GestureDetector手势识别--笔记

来源：互联网发布：fl网络语什么意思编辑：程序博客网时间：2024/05/17 21:38

public class MainActivity extends Activity {    private TextView tv;    private GestureDetector mGestureDetector;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        tv = (TextView) findViewById(R.id.id_imageview);        mGestureDetector = new GestureDetector(new MyGestrueListener());        tv.setOnTouchListener(new View.OnTouchListener() {            @Override//获取触摸屏幕发生的Event事件            public boolean onTouch(View v, MotionEvent event) {                mGestureDetector.onTouchEvent(event);                return true;            }        });    }    class MyGestrueListener extends GestureDetector.SimpleOnGestureListener {        @Override        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {            if (e1.getX() - e2.getX() > 50) {                Toast.makeText(MainActivity.this, "向左滑动", Toast.LENGTH_SHORT).show();            } else if ((e2.getX() - e1.getX() > 50)) {                Toast.makeText(MainActivity.this, "向右滑动", Toast.LENGTH_SHORT).show();            }            return super.onFling(e1, e2, velocityX, velocityY);        }    }}

0 0