58 lines
2.0 KiB
Java
58 lines
2.0 KiB
Java
package androidx.swiperefreshlayout.widget;
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import android.content.Context;
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import android.util.AttributeSet;
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import android.view.MotionEvent;
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import android.view.ViewConfiguration;
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public class ViewPagerSwipeRefreshLayout extends SwipeRefreshLayout {
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private float startY;
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private float startX;
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// 记录viewPager是否拖拽的标记
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private boolean mIsVpDragger;
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private final int mTouchSlop;
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public ViewPagerSwipeRefreshLayout(Context context, AttributeSet attrs) {
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super(context, attrs);
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mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
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}
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@Override
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public boolean onInterceptTouchEvent(MotionEvent ev) {
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int action = ev.getAction();
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switch (action) {
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case MotionEvent.ACTION_DOWN:
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// 记录手指按下的位置
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startY = ev.getY();
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startX = ev.getX();
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// 初始化标记
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mIsVpDragger = false;
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break;
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case MotionEvent.ACTION_MOVE:
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// 如果viewpager正在拖拽中，那么不拦截它的事件，直接return false；
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if(mIsVpDragger) {
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return false;
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}
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// 获取当前手指位置
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float endY = ev.getY();
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float endX = ev.getX();
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float distanceX = Math.abs(endX - startX);
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float distanceY = Math.abs(endY - startY);
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// 如果X轴位移大于Y轴位移，那么将事件交给viewPager处理。
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if(distanceX > mTouchSlop && distanceX > distanceY) {
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mIsVpDragger = true;
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return false;
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}
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break;
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case MotionEvent.ACTION_UP:
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case MotionEvent.ACTION_CANCEL:
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// 初始化标记
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mIsVpDragger = false;
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break;
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}
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// 如果是Y轴位移大于X轴，事件交给swipeRefreshLayout处理。
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return super.onInterceptTouchEvent(ev);
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}
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} |