ADD week 5
This commit is contained in:
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package androidx.viewpager2.widget;
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import android.animation.LayoutTransition;
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import android.view.View;
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import android.view.ViewGroup;
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import androidx.recyclerview.widget.LinearLayoutManager;
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import java.lang.reflect.Array;
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import java.util.Arrays;
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import java.util.Comparator;
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/* loaded from: classes.dex */
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final class AnimateLayoutChangeDetector {
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private static final ViewGroup.MarginLayoutParams ZERO_MARGIN_LAYOUT_PARAMS;
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private LinearLayoutManager mLayoutManager;
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static {
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ViewGroup.MarginLayoutParams marginLayoutParams = new ViewGroup.MarginLayoutParams(-1, -1);
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ZERO_MARGIN_LAYOUT_PARAMS = marginLayoutParams;
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marginLayoutParams.setMargins(0, 0, 0, 0);
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}
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AnimateLayoutChangeDetector(LinearLayoutManager linearLayoutManager) {
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this.mLayoutManager = linearLayoutManager;
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}
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boolean mayHaveInterferingAnimations() {
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return (!arePagesLaidOutContiguously() || this.mLayoutManager.getChildCount() <= 1) && hasRunningChangingLayoutTransition();
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}
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private boolean arePagesLaidOutContiguously() {
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int top;
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int i;
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int bottom;
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int i2;
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int childCount = this.mLayoutManager.getChildCount();
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if (childCount == 0) {
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return true;
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}
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boolean z = this.mLayoutManager.getOrientation() == 0;
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int[][] iArr = (int[][]) Array.newInstance((Class<?>) Integer.TYPE, childCount, 2);
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for (int i3 = 0; i3 < childCount; i3++) {
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View childAt = this.mLayoutManager.getChildAt(i3);
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if (childAt == null) {
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throw new IllegalStateException("null view contained in the view hierarchy");
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}
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ViewGroup.LayoutParams layoutParams = childAt.getLayoutParams();
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ViewGroup.MarginLayoutParams marginLayoutParams = layoutParams instanceof ViewGroup.MarginLayoutParams ? (ViewGroup.MarginLayoutParams) layoutParams : ZERO_MARGIN_LAYOUT_PARAMS;
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int[] iArr2 = iArr[i3];
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if (z) {
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top = childAt.getLeft();
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i = marginLayoutParams.leftMargin;
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} else {
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top = childAt.getTop();
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i = marginLayoutParams.topMargin;
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}
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iArr2[0] = top - i;
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int[] iArr3 = iArr[i3];
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if (z) {
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bottom = childAt.getRight();
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i2 = marginLayoutParams.rightMargin;
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} else {
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bottom = childAt.getBottom();
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i2 = marginLayoutParams.bottomMargin;
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}
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iArr3[1] = bottom + i2;
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}
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Arrays.sort(iArr, new Comparator<int[]>() { // from class: androidx.viewpager2.widget.AnimateLayoutChangeDetector.1
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@Override // java.util.Comparator
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public int compare(int[] iArr4, int[] iArr5) {
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return iArr4[0] - iArr5[0];
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}
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});
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for (int i4 = 1; i4 < childCount; i4++) {
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if (iArr[i4 - 1][1] != iArr[i4][0]) {
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return false;
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}
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}
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int[] iArr4 = iArr[0];
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int i5 = iArr4[1];
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int i6 = iArr4[0];
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return i6 <= 0 && iArr[childCount - 1][1] >= i5 - i6;
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}
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private boolean hasRunningChangingLayoutTransition() {
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int childCount = this.mLayoutManager.getChildCount();
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for (int i = 0; i < childCount; i++) {
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if (hasRunningChangingLayoutTransition(this.mLayoutManager.getChildAt(i))) {
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return true;
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}
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}
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return false;
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}
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private static boolean hasRunningChangingLayoutTransition(View view) {
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if (view instanceof ViewGroup) {
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ViewGroup viewGroup = (ViewGroup) view;
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LayoutTransition layoutTransition = viewGroup.getLayoutTransition();
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if (layoutTransition != null && layoutTransition.isChangingLayout()) {
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return true;
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}
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int childCount = viewGroup.getChildCount();
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for (int i = 0; i < childCount; i++) {
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if (hasRunningChangingLayoutTransition(viewGroup.getChildAt(i))) {
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return true;
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}
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}
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}
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return false;
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}
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}
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@ -0,0 +1,64 @@
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package androidx.viewpager2.widget;
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import androidx.viewpager2.widget.ViewPager2;
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import java.util.ArrayList;
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import java.util.ConcurrentModificationException;
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import java.util.Iterator;
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import java.util.List;
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/* loaded from: classes.dex */
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final class CompositeOnPageChangeCallback extends ViewPager2.OnPageChangeCallback {
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private final List<ViewPager2.OnPageChangeCallback> mCallbacks;
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CompositeOnPageChangeCallback(int i) {
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this.mCallbacks = new ArrayList(i);
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}
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void addOnPageChangeCallback(ViewPager2.OnPageChangeCallback onPageChangeCallback) {
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this.mCallbacks.add(onPageChangeCallback);
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}
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void removeOnPageChangeCallback(ViewPager2.OnPageChangeCallback onPageChangeCallback) {
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this.mCallbacks.remove(onPageChangeCallback);
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}
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@Override // androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
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public void onPageScrolled(int i, float f, int i2) {
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try {
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Iterator<ViewPager2.OnPageChangeCallback> it = this.mCallbacks.iterator();
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while (it.hasNext()) {
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it.next().onPageScrolled(i, f, i2);
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}
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} catch (ConcurrentModificationException e) {
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throwCallbackListModifiedWhileInUse(e);
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}
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}
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@Override // androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
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public void onPageSelected(int i) {
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try {
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Iterator<ViewPager2.OnPageChangeCallback> it = this.mCallbacks.iterator();
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while (it.hasNext()) {
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it.next().onPageSelected(i);
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}
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} catch (ConcurrentModificationException e) {
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throwCallbackListModifiedWhileInUse(e);
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}
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}
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@Override // androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
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public void onPageScrollStateChanged(int i) {
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try {
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Iterator<ViewPager2.OnPageChangeCallback> it = this.mCallbacks.iterator();
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while (it.hasNext()) {
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it.next().onPageScrollStateChanged(i);
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}
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} catch (ConcurrentModificationException e) {
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throwCallbackListModifiedWhileInUse(e);
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}
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}
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private void throwCallbackListModifiedWhileInUse(ConcurrentModificationException concurrentModificationException) {
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throw new IllegalStateException("Adding and removing callbacks during dispatch to callbacks is not supported", concurrentModificationException);
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}
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}
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@ -0,0 +1,28 @@
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package androidx.viewpager2.widget;
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import android.view.View;
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import androidx.viewpager2.widget.ViewPager2;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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/* loaded from: classes.dex */
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public final class CompositePageTransformer implements ViewPager2.PageTransformer {
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private final List<ViewPager2.PageTransformer> mTransformers = new ArrayList();
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public void addTransformer(ViewPager2.PageTransformer pageTransformer) {
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this.mTransformers.add(pageTransformer);
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}
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public void removeTransformer(ViewPager2.PageTransformer pageTransformer) {
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this.mTransformers.remove(pageTransformer);
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}
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@Override // androidx.viewpager2.widget.ViewPager2.PageTransformer
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public void transformPage(View view, float f) {
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Iterator<ViewPager2.PageTransformer> it = this.mTransformers.iterator();
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while (it.hasNext()) {
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it.next().transformPage(view, f);
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}
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}
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}
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94
02-Easy5/E5/sources/androidx/viewpager2/widget/FakeDrag.java
Normal file
94
02-Easy5/E5/sources/androidx/viewpager2/widget/FakeDrag.java
Normal file
@ -0,0 +1,94 @@
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package androidx.viewpager2.widget;
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import android.os.SystemClock;
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import android.view.MotionEvent;
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import android.view.VelocityTracker;
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import android.view.ViewConfiguration;
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import androidx.recyclerview.widget.RecyclerView;
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/* loaded from: classes.dex */
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final class FakeDrag {
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private int mActualDraggedDistance;
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private long mFakeDragBeginTime;
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private int mMaximumVelocity;
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private final RecyclerView mRecyclerView;
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private float mRequestedDragDistance;
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private final ScrollEventAdapter mScrollEventAdapter;
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private VelocityTracker mVelocityTracker;
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private final ViewPager2 mViewPager;
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FakeDrag(ViewPager2 viewPager2, ScrollEventAdapter scrollEventAdapter, RecyclerView recyclerView) {
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this.mViewPager = viewPager2;
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this.mScrollEventAdapter = scrollEventAdapter;
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this.mRecyclerView = recyclerView;
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}
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boolean isFakeDragging() {
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return this.mScrollEventAdapter.isFakeDragging();
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}
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boolean beginFakeDrag() {
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if (this.mScrollEventAdapter.isDragging()) {
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return false;
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}
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this.mActualDraggedDistance = 0;
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this.mRequestedDragDistance = 0;
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this.mFakeDragBeginTime = SystemClock.uptimeMillis();
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beginFakeVelocityTracker();
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this.mScrollEventAdapter.notifyBeginFakeDrag();
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if (!this.mScrollEventAdapter.isIdle()) {
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this.mRecyclerView.stopScroll();
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}
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addFakeMotionEvent(this.mFakeDragBeginTime, 0, 0.0f, 0.0f);
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return true;
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}
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boolean fakeDragBy(float f) {
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if (!this.mScrollEventAdapter.isFakeDragging()) {
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return false;
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}
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float f2 = this.mRequestedDragDistance - f;
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this.mRequestedDragDistance = f2;
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int round = Math.round(f2 - this.mActualDraggedDistance);
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this.mActualDraggedDistance += round;
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long uptimeMillis = SystemClock.uptimeMillis();
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boolean z = this.mViewPager.getOrientation() == 0;
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int i = z ? round : 0;
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int i2 = z ? 0 : round;
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float f3 = z ? this.mRequestedDragDistance : 0.0f;
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float f4 = z ? 0.0f : this.mRequestedDragDistance;
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this.mRecyclerView.scrollBy(i, i2);
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addFakeMotionEvent(uptimeMillis, 2, f3, f4);
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return true;
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}
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boolean endFakeDrag() {
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if (!this.mScrollEventAdapter.isFakeDragging()) {
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return false;
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}
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this.mScrollEventAdapter.notifyEndFakeDrag();
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VelocityTracker velocityTracker = this.mVelocityTracker;
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velocityTracker.computeCurrentVelocity(1000, this.mMaximumVelocity);
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if (this.mRecyclerView.fling((int) velocityTracker.getXVelocity(), (int) velocityTracker.getYVelocity())) {
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return true;
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}
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this.mViewPager.snapToPage();
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return true;
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}
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private void beginFakeVelocityTracker() {
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VelocityTracker velocityTracker = this.mVelocityTracker;
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if (velocityTracker == null) {
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this.mVelocityTracker = VelocityTracker.obtain();
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this.mMaximumVelocity = ViewConfiguration.get(this.mViewPager.getContext()).getScaledMaximumFlingVelocity();
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} else {
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velocityTracker.clear();
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}
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}
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private void addFakeMotionEvent(long j, int i, float f, float f2) {
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MotionEvent obtain = MotionEvent.obtain(this.mFakeDragBeginTime, j, i, f, f2, 0);
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this.mVelocityTracker.addMovement(obtain);
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obtain.recycle();
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}
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}
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@ -0,0 +1,40 @@
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package androidx.viewpager2.widget;
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import android.view.View;
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import android.view.ViewParent;
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import androidx.core.util.Preconditions;
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import androidx.recyclerview.widget.RecyclerView;
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import androidx.viewpager2.widget.ViewPager2;
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/* loaded from: classes.dex */
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public final class MarginPageTransformer implements ViewPager2.PageTransformer {
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private final int mMarginPx;
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public MarginPageTransformer(int i) {
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Preconditions.checkArgumentNonnegative(i, "Margin must be non-negative");
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this.mMarginPx = i;
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}
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@Override // androidx.viewpager2.widget.ViewPager2.PageTransformer
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public void transformPage(View view, float f) {
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ViewPager2 requireViewPager = requireViewPager(view);
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float f2 = this.mMarginPx * f;
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if (requireViewPager.getOrientation() == 0) {
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if (requireViewPager.isRtl()) {
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f2 = -f2;
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}
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view.setTranslationX(f2);
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return;
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}
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view.setTranslationY(f2);
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}
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private ViewPager2 requireViewPager(View view) {
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ViewParent parent = view.getParent();
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ViewParent parent2 = parent.getParent();
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if ((parent instanceof RecyclerView) && (parent2 instanceof ViewPager2)) {
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return (ViewPager2) parent2;
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}
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throw new IllegalStateException("Expected the page view to be managed by a ViewPager2 instance.");
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}
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}
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@ -0,0 +1,47 @@
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package androidx.viewpager2.widget;
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import android.view.View;
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import androidx.recyclerview.widget.LinearLayoutManager;
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import androidx.viewpager2.widget.ViewPager2;
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import java.util.Locale;
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/* loaded from: classes.dex */
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final class PageTransformerAdapter extends ViewPager2.OnPageChangeCallback {
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private final LinearLayoutManager mLayoutManager;
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private ViewPager2.PageTransformer mPageTransformer;
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ViewPager2.PageTransformer getPageTransformer() {
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return this.mPageTransformer;
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}
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|
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@Override // androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
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public void onPageScrollStateChanged(int i) {
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}
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@Override // androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
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public void onPageSelected(int i) {
|
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}
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void setPageTransformer(ViewPager2.PageTransformer pageTransformer) {
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this.mPageTransformer = pageTransformer;
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}
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PageTransformerAdapter(LinearLayoutManager linearLayoutManager) {
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this.mLayoutManager = linearLayoutManager;
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}
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@Override // androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
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public void onPageScrolled(int i, float f, int i2) {
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if (this.mPageTransformer == null) {
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return;
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}
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float f2 = -f;
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for (int i3 = 0; i3 < this.mLayoutManager.getChildCount(); i3++) {
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View childAt = this.mLayoutManager.getChildAt(i3);
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if (childAt == null) {
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throw new IllegalStateException(String.format(Locale.US, "LayoutManager returned a null child at pos %d/%d while transforming pages", Integer.valueOf(i3), Integer.valueOf(this.mLayoutManager.getChildCount())));
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}
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this.mPageTransformer.transformPage(childAt, (this.mLayoutManager.getPosition(childAt) - i) + f2);
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}
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}
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}
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@ -0,0 +1,353 @@
|
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package androidx.viewpager2.widget;
|
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|
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import android.view.View;
|
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import android.view.ViewGroup;
|
||||
import androidx.recyclerview.widget.LinearLayoutManager;
|
||||
import androidx.recyclerview.widget.RecyclerView;
|
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import androidx.viewpager2.widget.ViewPager2;
|
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import java.util.Locale;
|
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|
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/* loaded from: classes.dex */
|
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final class ScrollEventAdapter extends RecyclerView.OnScrollListener {
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private static final int NO_POSITION = -1;
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private static final int STATE_IDLE = 0;
|
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private static final int STATE_IN_PROGRESS_FAKE_DRAG = 4;
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private static final int STATE_IN_PROGRESS_IMMEDIATE_SCROLL = 3;
|
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private static final int STATE_IN_PROGRESS_MANUAL_DRAG = 1;
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private static final int STATE_IN_PROGRESS_SMOOTH_SCROLL = 2;
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private int mAdapterState;
|
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private ViewPager2.OnPageChangeCallback mCallback;
|
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private boolean mDataSetChangeHappened;
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private boolean mDispatchSelected;
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private int mDragStartPosition;
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private boolean mFakeDragging;
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private final LinearLayoutManager mLayoutManager;
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private final RecyclerView mRecyclerView;
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private boolean mScrollHappened;
|
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private int mScrollState;
|
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private ScrollEventValues mScrollValues;
|
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private int mTarget;
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private final ViewPager2 mViewPager;
|
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private boolean isInAnyDraggingState() {
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int i = this.mAdapterState;
|
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return i == 1 || i == 4;
|
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}
|
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|
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int getScrollState() {
|
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return this.mScrollState;
|
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}
|
||||
|
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boolean isDragging() {
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return this.mScrollState == 1;
|
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}
|
||||
|
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boolean isFakeDragging() {
|
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return this.mFakeDragging;
|
||||
}
|
||||
|
||||
boolean isIdle() {
|
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return this.mScrollState == 0;
|
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}
|
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|
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void notifyDataSetChangeHappened() {
|
||||
this.mDataSetChangeHappened = true;
|
||||
}
|
||||
|
||||
void setOnPageChangeCallback(ViewPager2.OnPageChangeCallback onPageChangeCallback) {
|
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this.mCallback = onPageChangeCallback;
|
||||
}
|
||||
|
||||
ScrollEventAdapter(ViewPager2 viewPager2) {
|
||||
this.mViewPager = viewPager2;
|
||||
RecyclerView recyclerView = viewPager2.mRecyclerView;
|
||||
this.mRecyclerView = recyclerView;
|
||||
this.mLayoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
|
||||
this.mScrollValues = new ScrollEventValues();
|
||||
resetState();
|
||||
}
|
||||
|
||||
private void resetState() {
|
||||
this.mAdapterState = 0;
|
||||
this.mScrollState = 0;
|
||||
this.mScrollValues.reset();
|
||||
this.mDragStartPosition = -1;
|
||||
this.mTarget = -1;
|
||||
this.mDispatchSelected = false;
|
||||
this.mScrollHappened = false;
|
||||
this.mFakeDragging = false;
|
||||
this.mDataSetChangeHappened = false;
|
||||
}
|
||||
|
||||
@Override // androidx.recyclerview.widget.RecyclerView.OnScrollListener
|
||||
public void onScrollStateChanged(RecyclerView recyclerView, int i) {
|
||||
if ((this.mAdapterState != 1 || this.mScrollState != 1) && i == 1) {
|
||||
startDrag(false);
|
||||
return;
|
||||
}
|
||||
if (isInAnyDraggingState() && i == 2) {
|
||||
if (this.mScrollHappened) {
|
||||
dispatchStateChanged(2);
|
||||
this.mDispatchSelected = true;
|
||||
return;
|
||||
}
|
||||
return;
|
||||
}
|
||||
if (isInAnyDraggingState() && i == 0) {
|
||||
updateScrollEventValues();
|
||||
if (!this.mScrollHappened) {
|
||||
if (this.mScrollValues.mPosition != -1) {
|
||||
dispatchScrolled(this.mScrollValues.mPosition, 0.0f, 0);
|
||||
}
|
||||
} else if (this.mScrollValues.mOffsetPx == 0) {
|
||||
if (this.mDragStartPosition != this.mScrollValues.mPosition) {
|
||||
dispatchSelected(this.mScrollValues.mPosition);
|
||||
}
|
||||
}
|
||||
dispatchStateChanged(0);
|
||||
resetState();
|
||||
}
|
||||
if (this.mAdapterState == 2 && i == 0 && this.mDataSetChangeHappened) {
|
||||
updateScrollEventValues();
|
||||
if (this.mScrollValues.mOffsetPx == 0) {
|
||||
if (this.mTarget != this.mScrollValues.mPosition) {
|
||||
dispatchSelected(this.mScrollValues.mPosition == -1 ? 0 : this.mScrollValues.mPosition);
|
||||
}
|
||||
dispatchStateChanged(0);
|
||||
resetState();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* JADX WARN: Code restructure failed: missing block: B:9:0x001d, code lost:
|
||||
|
||||
if ((r5 < 0) == r3.mViewPager.isRtl()) goto L12;
|
||||
*/
|
||||
/* JADX WARN: Removed duplicated region for block: B:14:0x0035 */
|
||||
@Override // androidx.recyclerview.widget.RecyclerView.OnScrollListener
|
||||
/*
|
||||
Code decompiled incorrectly, please refer to instructions dump.
|
||||
To view partially-correct add '--show-bad-code' argument
|
||||
*/
|
||||
public void onScrolled(androidx.recyclerview.widget.RecyclerView r4, int r5, int r6) {
|
||||
/*
|
||||
r3 = this;
|
||||
r4 = 1
|
||||
r3.mScrollHappened = r4
|
||||
r3.updateScrollEventValues()
|
||||
boolean r0 = r3.mDispatchSelected
|
||||
r1 = -1
|
||||
r2 = 0
|
||||
if (r0 == 0) goto L39
|
||||
r3.mDispatchSelected = r2
|
||||
if (r6 > 0) goto L1f
|
||||
if (r6 != 0) goto L2b
|
||||
if (r5 >= 0) goto L16
|
||||
r5 = 1
|
||||
goto L17
|
||||
L16:
|
||||
r5 = 0
|
||||
L17:
|
||||
androidx.viewpager2.widget.ViewPager2 r6 = r3.mViewPager
|
||||
boolean r6 = r6.isRtl()
|
||||
if (r5 != r6) goto L2b
|
||||
L1f:
|
||||
androidx.viewpager2.widget.ScrollEventAdapter$ScrollEventValues r5 = r3.mScrollValues
|
||||
int r5 = r5.mOffsetPx
|
||||
if (r5 == 0) goto L2b
|
||||
androidx.viewpager2.widget.ScrollEventAdapter$ScrollEventValues r5 = r3.mScrollValues
|
||||
int r5 = r5.mPosition
|
||||
int r5 = r5 + r4
|
||||
goto L2f
|
||||
L2b:
|
||||
androidx.viewpager2.widget.ScrollEventAdapter$ScrollEventValues r5 = r3.mScrollValues
|
||||
int r5 = r5.mPosition
|
||||
L2f:
|
||||
r3.mTarget = r5
|
||||
int r6 = r3.mDragStartPosition
|
||||
if (r6 == r5) goto L47
|
||||
r3.dispatchSelected(r5)
|
||||
goto L47
|
||||
L39:
|
||||
int r5 = r3.mAdapterState
|
||||
if (r5 != 0) goto L47
|
||||
androidx.viewpager2.widget.ScrollEventAdapter$ScrollEventValues r5 = r3.mScrollValues
|
||||
int r5 = r5.mPosition
|
||||
if (r5 != r1) goto L44
|
||||
r5 = 0
|
||||
L44:
|
||||
r3.dispatchSelected(r5)
|
||||
L47:
|
||||
androidx.viewpager2.widget.ScrollEventAdapter$ScrollEventValues r5 = r3.mScrollValues
|
||||
int r5 = r5.mPosition
|
||||
if (r5 != r1) goto L4f
|
||||
r5 = 0
|
||||
goto L53
|
||||
L4f:
|
||||
androidx.viewpager2.widget.ScrollEventAdapter$ScrollEventValues r5 = r3.mScrollValues
|
||||
int r5 = r5.mPosition
|
||||
L53:
|
||||
androidx.viewpager2.widget.ScrollEventAdapter$ScrollEventValues r6 = r3.mScrollValues
|
||||
float r6 = r6.mOffset
|
||||
androidx.viewpager2.widget.ScrollEventAdapter$ScrollEventValues r0 = r3.mScrollValues
|
||||
int r0 = r0.mOffsetPx
|
||||
r3.dispatchScrolled(r5, r6, r0)
|
||||
androidx.viewpager2.widget.ScrollEventAdapter$ScrollEventValues r5 = r3.mScrollValues
|
||||
int r5 = r5.mPosition
|
||||
int r6 = r3.mTarget
|
||||
if (r5 == r6) goto L68
|
||||
if (r6 != r1) goto L78
|
||||
L68:
|
||||
androidx.viewpager2.widget.ScrollEventAdapter$ScrollEventValues r5 = r3.mScrollValues
|
||||
int r5 = r5.mOffsetPx
|
||||
if (r5 != 0) goto L78
|
||||
int r5 = r3.mScrollState
|
||||
if (r5 == r4) goto L78
|
||||
r3.dispatchStateChanged(r2)
|
||||
r3.resetState()
|
||||
L78:
|
||||
return
|
||||
*/
|
||||
throw new UnsupportedOperationException("Method not decompiled: androidx.viewpager2.widget.ScrollEventAdapter.onScrolled(androidx.recyclerview.widget.RecyclerView, int, int):void");
|
||||
}
|
||||
|
||||
private void updateScrollEventValues() {
|
||||
int top;
|
||||
ScrollEventValues scrollEventValues = this.mScrollValues;
|
||||
scrollEventValues.mPosition = this.mLayoutManager.findFirstVisibleItemPosition();
|
||||
if (scrollEventValues.mPosition == -1) {
|
||||
scrollEventValues.reset();
|
||||
return;
|
||||
}
|
||||
View findViewByPosition = this.mLayoutManager.findViewByPosition(scrollEventValues.mPosition);
|
||||
if (findViewByPosition == null) {
|
||||
scrollEventValues.reset();
|
||||
return;
|
||||
}
|
||||
int leftDecorationWidth = this.mLayoutManager.getLeftDecorationWidth(findViewByPosition);
|
||||
int rightDecorationWidth = this.mLayoutManager.getRightDecorationWidth(findViewByPosition);
|
||||
int topDecorationHeight = this.mLayoutManager.getTopDecorationHeight(findViewByPosition);
|
||||
int bottomDecorationHeight = this.mLayoutManager.getBottomDecorationHeight(findViewByPosition);
|
||||
ViewGroup.LayoutParams layoutParams = findViewByPosition.getLayoutParams();
|
||||
if (layoutParams instanceof ViewGroup.MarginLayoutParams) {
|
||||
ViewGroup.MarginLayoutParams marginLayoutParams = (ViewGroup.MarginLayoutParams) layoutParams;
|
||||
leftDecorationWidth += marginLayoutParams.leftMargin;
|
||||
rightDecorationWidth += marginLayoutParams.rightMargin;
|
||||
topDecorationHeight += marginLayoutParams.topMargin;
|
||||
bottomDecorationHeight += marginLayoutParams.bottomMargin;
|
||||
}
|
||||
int height = findViewByPosition.getHeight() + topDecorationHeight + bottomDecorationHeight;
|
||||
int width = findViewByPosition.getWidth() + leftDecorationWidth + rightDecorationWidth;
|
||||
if (this.mLayoutManager.getOrientation() == 0) {
|
||||
top = (findViewByPosition.getLeft() - leftDecorationWidth) - this.mRecyclerView.getPaddingLeft();
|
||||
if (this.mViewPager.isRtl()) {
|
||||
top = -top;
|
||||
}
|
||||
height = width;
|
||||
} else {
|
||||
top = (findViewByPosition.getTop() - topDecorationHeight) - this.mRecyclerView.getPaddingTop();
|
||||
}
|
||||
scrollEventValues.mOffsetPx = -top;
|
||||
if (scrollEventValues.mOffsetPx < 0) {
|
||||
if (new AnimateLayoutChangeDetector(this.mLayoutManager).mayHaveInterferingAnimations()) {
|
||||
throw new IllegalStateException("Page(s) contain a ViewGroup with a LayoutTransition (or animateLayoutChanges=\"true\"), which interferes with the scrolling animation. Make sure to call getLayoutTransition().setAnimateParentHierarchy(false) on all ViewGroups with a LayoutTransition before an animation is started.");
|
||||
}
|
||||
throw new IllegalStateException(String.format(Locale.US, "Page can only be offset by a positive amount, not by %d", Integer.valueOf(scrollEventValues.mOffsetPx)));
|
||||
}
|
||||
scrollEventValues.mOffset = height == 0 ? 0.0f : scrollEventValues.mOffsetPx / height;
|
||||
}
|
||||
|
||||
private void startDrag(boolean z) {
|
||||
this.mFakeDragging = z;
|
||||
this.mAdapterState = z ? 4 : 1;
|
||||
int i = this.mTarget;
|
||||
if (i != -1) {
|
||||
this.mDragStartPosition = i;
|
||||
this.mTarget = -1;
|
||||
} else if (this.mDragStartPosition == -1) {
|
||||
this.mDragStartPosition = getPosition();
|
||||
}
|
||||
dispatchStateChanged(1);
|
||||
}
|
||||
|
||||
void notifyProgrammaticScroll(int i, boolean z) {
|
||||
this.mAdapterState = z ? 2 : 3;
|
||||
this.mFakeDragging = false;
|
||||
boolean z2 = this.mTarget != i;
|
||||
this.mTarget = i;
|
||||
dispatchStateChanged(2);
|
||||
if (z2) {
|
||||
dispatchSelected(i);
|
||||
}
|
||||
}
|
||||
|
||||
void notifyBeginFakeDrag() {
|
||||
this.mAdapterState = 4;
|
||||
startDrag(true);
|
||||
}
|
||||
|
||||
void notifyEndFakeDrag() {
|
||||
if (!isDragging() || this.mFakeDragging) {
|
||||
this.mFakeDragging = false;
|
||||
updateScrollEventValues();
|
||||
if (this.mScrollValues.mOffsetPx == 0) {
|
||||
if (this.mScrollValues.mPosition != this.mDragStartPosition) {
|
||||
dispatchSelected(this.mScrollValues.mPosition);
|
||||
}
|
||||
dispatchStateChanged(0);
|
||||
resetState();
|
||||
return;
|
||||
}
|
||||
dispatchStateChanged(2);
|
||||
}
|
||||
}
|
||||
|
||||
double getRelativeScrollPosition() {
|
||||
updateScrollEventValues();
|
||||
return this.mScrollValues.mPosition + this.mScrollValues.mOffset;
|
||||
}
|
||||
|
||||
private void dispatchStateChanged(int i) {
|
||||
if ((this.mAdapterState == 3 && this.mScrollState == 0) || this.mScrollState == i) {
|
||||
return;
|
||||
}
|
||||
this.mScrollState = i;
|
||||
ViewPager2.OnPageChangeCallback onPageChangeCallback = this.mCallback;
|
||||
if (onPageChangeCallback != null) {
|
||||
onPageChangeCallback.onPageScrollStateChanged(i);
|
||||
}
|
||||
}
|
||||
|
||||
private void dispatchSelected(int i) {
|
||||
ViewPager2.OnPageChangeCallback onPageChangeCallback = this.mCallback;
|
||||
if (onPageChangeCallback != null) {
|
||||
onPageChangeCallback.onPageSelected(i);
|
||||
}
|
||||
}
|
||||
|
||||
private void dispatchScrolled(int i, float f, int i2) {
|
||||
ViewPager2.OnPageChangeCallback onPageChangeCallback = this.mCallback;
|
||||
if (onPageChangeCallback != null) {
|
||||
onPageChangeCallback.onPageScrolled(i, f, i2);
|
||||
}
|
||||
}
|
||||
|
||||
private int getPosition() {
|
||||
return this.mLayoutManager.findFirstVisibleItemPosition();
|
||||
}
|
||||
|
||||
private static final class ScrollEventValues {
|
||||
float mOffset;
|
||||
int mOffsetPx;
|
||||
int mPosition;
|
||||
|
||||
void reset() {
|
||||
this.mPosition = -1;
|
||||
this.mOffset = 0.0f;
|
||||
this.mOffsetPx = 0;
|
||||
}
|
||||
|
||||
ScrollEventValues() {
|
||||
}
|
||||
}
|
||||
}
|
||||
1122
02-Easy5/E5/sources/androidx/viewpager2/widget/ViewPager2.java
Normal file
1122
02-Easy5/E5/sources/androidx/viewpager2/widget/ViewPager2.java
Normal file
File diff suppressed because it is too large
Load Diff
Reference in New Issue
Block a user