问题描述
我正在尝试将滑动功能与布局上的可点击视图结合起来。 我通过遵循 https://github.com/romannurik/Android-SwipeToDismiss
中的库实现来实现SwipedismisstouchListener
现在我有这个布局（如下），我可以向右或向左滑动它，但我注意到如果我的滑动起点在任何可点击的对象上，如（此处）TextView，我无法滑动整个视图。
我不知道如何才能同时做到：
- 当我滑动时 -> 当我的滑动起点在任何可点击对象上时向右滑动
- 当我点击 -> 点击
TextView
这是我的代码，MainActivity：
public class MainActivity extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ViewGroup parent = findViewById(R.id.parent);
ViewGroup container = findViewById(R.id.container);
TextView text1 = findViewById(R.id.text1);
text1.setonClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(v.getContext(),"Clicked on text1",Toast.LENGTH_SHORT).show();
}
});
container.setClickable(true);
container.setFocusable(false);
container.setonTouchListener(
new SwipedismisstouchListener(parent,new SwipedismisstouchListener.dismissCallbacks() {
@Override
public boolean candismiss() {
return true;
}
@Override
public void ondismiss(View view) {
parent.removeView(container);
}
}));
}
}
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ValueAnimator;
import android.view.MotionEvent;
import android.view.VeLocityTracker;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
public class SwipedismisstouchListener implements View.OnTouchListener {
// Cached ViewConfiguration and system-wide constant values
private int mSlop;
private int mMinFlingVeLocity;
private int mMaxFlingVeLocity;
private long mAnimationTime;
// Fixed properties
private View mView;
private dismissCallbacks mCallbacks;
private int mViewWidth = 1; // 1 and not 0 to prevent dividing by zero
// Transient properties
private float mDownX;
private float mDownY;
private boolean mSwiping;
private int mSwipingSlop;
private VeLocityTracker mVeLocityTracker;
private float mTranslationX;
public interface dismissCallbacks {
boolean candismiss();
void ondismiss(View view);
}
public SwipedismisstouchListener(View view,dismissCallbacks callbacks) {
ViewConfiguration vc = ViewConfiguration.get(view.getContext());
mSlop = vc.getScaledTouchSlop();
mMinFlingVeLocity = vc.getScaledMinimumFlingVeLocity() * 16;
mMaxFlingVeLocity = vc.getScaledMaximumFlingVeLocity();
mAnimationTime = view.getContext().getResources().getInteger(
android.R.integer.config_shortAnimTime);
mView = view;
mCallbacks = callbacks;
}
@Override
public boolean onTouch(View view,MotionEvent motionEvent) {
// offset because the view is translated during swipe
motionEvent.offsetLocation(mTranslationX,0);
// not sure what it is
if (mViewWidth < 2) {
mViewWidth = mView.getWidth();
}
switch (motionEvent.getActionMasked()) {
case MotionEvent.ACTION_DOWN: {
mDownX = motionEvent.getRawX();
mDownY = motionEvent.getRawY();
if (mCallbacks.candismiss()) {
mVeLocityTracker = VeLocityTracker.obtain();
mVeLocityTracker.addMovement(motionEvent);
}
return false;
}
case MotionEvent.ACTION_UP: {
if (mVeLocityTracker == null) {
break;
}
float deltaX = motionEvent.getRawX() - mDownX;
mVeLocityTracker.addMovement(motionEvent);
mVeLocityTracker.computeCurrentVeLocity(1000);
float veLocityX = mVeLocityTracker.getXVeLocity();
float absveLocityX = Math.abs(veLocityX);
float absveLocityY = Math.abs(mVeLocityTracker.getYVeLocity());
boolean dismiss = false;
boolean dismissRight = false;
if (Math.abs(deltaX) > mViewWidth / 2 && mSwiping) {
dismiss = true;
dismissRight = deltaX > 0;
} else if (mMinFlingVeLocity <= absveLocityX && absveLocityX <= mMaxFlingVeLocity
&& absveLocityY < absveLocityX
&& absveLocityY < absveLocityX && mSwiping) {
// dismiss only if flinging in the same direction as dragging
dismiss = (veLocityX < 0) == (deltaX < 0);
dismissRight = mVeLocityTracker.getXVeLocity() > 0;
}
if (dismiss) {
// dismiss
mView.animate()
.translationX(dismissRight ? mViewWidth : -mViewWidth)
.alpha(0)
.setDuration(mAnimationTime)
.setListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
performdismiss();
}
});
} else if (mSwiping) {
// cancel
mView.animate()
.translationX(0)
.alpha(1)
.setDuration(mAnimationTime)
.setListener(null);
}
mVeLocityTracker.recycle();
mVeLocityTracker = null;
mTranslationX = 0;
mDownX = 0;
mDownY = 0;
mSwiping = false;
break;
}
case MotionEvent.ACTION_CANCEL: {
if (mVeLocityTracker == null) {
break;
}
mView.animate()
.translationX(0)
.alpha(1)
.setDuration(mAnimationTime)
.setListener(null);
mVeLocityTracker.recycle();
mVeLocityTracker = null;
mTranslationX = 0;
mDownX = 0;
mDownY = 0;
mSwiping = false;
break;
}
case MotionEvent.ACTION_MOVE: {
if (mVeLocityTracker == null) {
break;
}
mVeLocityTracker.addMovement(motionEvent);
float deltaX = motionEvent.getRawX() - mDownX;
float deltaY = motionEvent.getRawY() - mDownY;
if (Math.abs(deltaX) > mSlop && Math.abs(deltaY) < Math.abs(deltaX) / 2) {
mSwiping = true;
mSwipingSlop = (deltaX > 0 ? mSlop : -mSlop);
view.getParent().requestdisallowInterceptTouchEvent(true);
// Cancel listview's touch
MotionEvent cancelEvent = MotionEvent.obtain(motionEvent);
cancelEvent.setAction(MotionEvent.ACTION_CANCEL |
(motionEvent.getActionIndex() <<
MotionEvent.ACTION_POINTER_INDEX_SHIFT));
view.onTouchEvent(cancelEvent);
cancelEvent.recycle();
}
if (mSwiping) {
mTranslationX = deltaX;
mView.setTranslationX(deltaX - mSwipingSlop);
// Todo: use an ease-out interpolator or such
mView.setAlpha(Math.max(0f,Math.min(1f,1f - 2f * Math.abs(deltaX) / mViewWidth)));
return true;
}
break;
}
}
return false;
}
private void performdismiss() {
final ViewGroup.LayoutParams lp = mView.getLayoutParams();
final int originalHeight = mView.getHeight();
ValueAnimator animator = ValueAnimator.ofInt(originalHeight,1).setDuration(mAnimationTime);
animator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
mCallbacks.ondismiss(mView);
// Reset view presentation
mView.setAlpha(1f);
mView.setTranslationX(0);
lp.height = originalHeight;
mView.setLayoutParams(lp);
}
});
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
lp.height = (Integer) valueAnimator.getAnimatedValue();
mView.setLayoutParams(lp);
}
});
animator.start();
}
}
activity_main.xml：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/root"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:baselineAligned="false"
android:orientation="horizontal">
<LinearLayout
android:id="@+id/parent"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="100dp"
android:background="#7CB342"
android:gravity="center"
android:orientation="vertical">
<TextView
android:id="@+id/text1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:background="#AEEA00"
android:gravity="center"
android:text="Test"
android:textStyle="bold" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
解决方法
阅读 onInterceptTouchEvent() 的文档：https://developer.android.com/training/gestures/viewgroup#intercept
提供的代码片段应涵盖您的确切用例。