检测Android中触摸屏手势的动作与坐标

最新推荐文章于 2021-05-26 09:20:55 发布

最新推荐文章于 2021-05-26 09:20:55 发布 · 308 阅读

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#Android #UP #OS

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很小很简单的程序，但很有用：

package com.ray.touch;

import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.widget.TextView;
import android.widget.Toast;

public class TouchPaint extends Activity {
    TextView tv;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        tv = (TextView) findViewById(R.id.tv);
    }

	@Override
	public boolean onTouchEvent(MotionEvent event) {
		float x = event.getX();
		float y = event.getY();
		switch(event.getAction()){
			case MotionEvent.ACTION_DOWN: tv.setText("down"+"("+x+","+y+")");break;
			case MotionEvent.ACTION_UP: tv.setText("up"+"("+x+","+y+")");break;
			case MotionEvent.ACTION_MOVE:tv.setText("move"+"("+x+","+y+")");break;
		}
		return super.onTouchEvent(event);
	}
}