下面给出实现的截图对比：

下面给出本实例的源代码：

package irdc.ex07_20;

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

public class EX07_20 extends Activity
{
private TextView myText1;
private TextView myText2;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
/* 加载main.xml Layout */
setContentView(R.layout.main);
/* TextView初始化 */
myText1=(TextView)findViewById(R.id.text1);
myText2=(TextView)findViewById(R.id.text2);
}

/* 重写onTouchEvent() */
@Override
public boolean onTouchEvent(MotionEvent event)
{
/* 显示触碰点的数量 */
myText2.setText(""+event.getPointerCount());

/* event的Action 断 */
switch(event.getAction())
{
/* 触碰事件发生 */
case MotionEvent.ACTION_DOWN:
myText1.setText(getResources().getString(R.string.act1));
break;
/* 触碰事件结束 */
case MotionEvent.ACTION_UP:
myText1.setText(getResources().getString(R.string.act2));
/* 显示点数为0 */
myText2.setText("0");
break;
/* 第1个触碰点被按下 */
case MotionEvent.ACTION_POINTER_1_DOWN:
myText1.setText(getResources().getString(R.string.act3));
break;
/* 第1个触碰点被移除 */
case MotionEvent.ACTION_POINTER_1_UP:
myText1.setText(getResources().getString(R.string.act4));
break;
/* 第2个触碰点被按下 */
case MotionEvent.ACTION_POINTER_2_DOWN:
myText1.setText(getResources().getString(R.string.act5));
break;
/* 第2个触碰点被移除 */
case MotionEvent.ACTION_POINTER_2_UP:
myText1.setText(getResources().getString(R.string.act6));
break;
default:
break;
}
return super.onTouchEvent(event);
}
}