Android(安卓)OnTouchListener 触摸事件 & GestureDetector 手势识别类
16lz
2021-12-19
OnTouchListener 触摸事件 & GestureDetector 手势识别类
package com.example.gesturedetector;import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.view.GestureDetector;import android.view.GestureDetector.SimpleOnGestureListener;import android.view.Menu;import android.view.MenuItem;import android.view.MotionEvent;import android.view.View;import android.view.View.OnTouchListener;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;/* * GestureDetector 手势识别类 */public class MainActivity extends Activity { private ImageView img0; private GestureDetector myGestureDetector; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); myGestureDetector = new GestureDetector(this, new MyOnGestureListener()); img0 = (ImageView) findViewById(R.id.img0); img0.setOnTouchListener(new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { Log.e("AAA", "abc"); myGestureDetector.onTouchEvent(event); return true; } }); } class MyOnGestureListener extends SimpleOnGestureListener{ @Override public boolean onSingleTapUp(MotionEvent e) { Log.e("AAA", "轻击屏幕-----" + getActionName(e.getAction())); return false; } @Override public void onLongPress(MotionEvent e) { Log.e("AAA", "长按触摸屏-----" + getActionName(e.getAction())); } @Override public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { Log.e("AAA","拖动屏幕-----" + getActionName(e2.getAction()) + ",(" + e1.getX() + "," + e1.getY() + ") ,("+ e2.getX() + "," + e2.getY() + ")"); return false; } // e1 代表手指第一次触摸屏幕的事件 // e2 代表手指离开屏幕一瞬间的事件 // velocityX 水平方向的速度 单位 pix/s // velocityY 竖直方向的速度 @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { Log.e("AAA","滑屏-----" + getActionName(e2.getAction()) + ",(" + e1.getX() + "," + e1.getY() + ") ,("+ e2.getX() + "," + e2.getY() + ")"); return false; } @Override public void onShowPress(MotionEvent e) { Log.e("AAA", "按下短时间-----" + getActionName(e.getAction())); } @Override public boolean onDown(MotionEvent e) { Log.e("AAA", "按下屏幕触发-----" + getActionName(e.getAction())); return false; } @Override public boolean onDoubleTap(MotionEvent e) { Log.e("AAA", "双击的第二下-----" + getActionName(e.getAction())); return false; } @Override public boolean onDoubleTapEvent(MotionEvent e) { Log.e("AAA","双击的手势中的事件down、up和move-----" + getActionName(e.getAction())); return false; } @Override public boolean onSingleTapConfirmed(MotionEvent e) { Log.e("AAA", "用来判定该次点击是SingleTap而不是DoubleTap-----" + getActionName(e.getAction())); return false; } } private String getActionName(int action) { String name = ""; switch (action) { case MotionEvent.ACTION_DOWN: { name = "ACTION_DOWN"; break; } case MotionEvent.ACTION_MOVE: { name = "ACTION_MOVE"; break; } case MotionEvent.ACTION_UP: { name = "ACTION_UP"; break; } default: break; } return name; }}更多相关文章
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