Android 各View的Touch事件

如果所示布局一个Layout跟Textview：

 1 package com.domo.touch;
 2 
 3 import android.app.Activity;
 4 import android.os.Bundle;
 5 import android.util.Log;
 6 import android.view.MotionEvent;
 7 import android.view.View;
 8 import android.view.View.OnTouchListener;
 9 import android.widget.TextView;
10 
11 public class TestTouchActivity extends Activity {
12     /** Called when the activity is first created. */
13     @Override
14     public void onCreate(Bundle savedInstanceState) {
15         super.onCreate(savedInstanceState);
16         setContentView(R.layout.main);
17 
18         TextView textView = (TextView) findViewById(R.id.textview);
19         textView.setOnTouchListener(new OnTouchListener() {
20 
21             public boolean onTouch(View v, MotionEvent event) {
22                 // TODO Auto-generated method stub
23                 switch (event.getAction()) {
24                 case MotionEvent.ACTION_DOWN:
25                     Log.v("TAG", "TextView: ACTION_DOWN" + MotionEvent.ACTION_DOWN);
26                     break;
27                 case MotionEvent.ACTION_UP:
28                     Log.v("TAG", "TextView : ACTION_UP" + MotionEvent.ACTION_UP);
29                     break;
30                 default:
31                     break;
32                 }
33                 
34                 return false;
35             }
36         });
37     }
38 
39     @Override
40     public boolean dispatchTouchEvent(MotionEvent ev) {
41         // TODO Auto-generated method stub
42         switch (ev.getAction()) {
43         case MotionEvent.ACTION_DOWN:
44             Log.v("TAG", "Activity_dis: ACTION_DOWN" + MotionEvent.ACTION_DOWN);
45             break;
46         case MotionEvent.ACTION_UP:
47             Log.v("TAG", "Activity_dis: ACTION_UP" + MotionEvent.ACTION_UP);
48             break;
49         default:
50             break;
51         }
52         Log.v("TAG", "Activity_dis: " + super.dispatchTouchEvent(ev));
53         return super.dispatchTouchEvent(ev);
54     }
55 
56 }

代码图如上：
当dispatchTouchEvent的返回值为super.dispatchTouchEvent(ev)时，获取到super.dispatchTouchEvent(ev)为False；点击Textview的显示的结果为：

1 04-28 01:09:32.978: V/TAG(5733): Activity_dis: ACTION_DOWN0
2 04-28 01:09:32.978: V/TAG(5733): TextView: ACTION_DOWN0
3 04-28 01:09:32.978: V/TAG(5733): Activity_dis: false
4 04-28 01:09:32.978: V/TAG(5733): TextView: ACTION_DOWN0     TextView只能获取到Down事件
5 04-28 01:09:33.068: V/TAG(5733): Activity_dis: false
6 04-28 01:09:33.088: V/TAG(5733): Activity_dis: ACTION_UP1
7 04-28 01:09:33.088: V/TAG(5733): Activity_dis: false

当dispatchTouchEvent的返回值为false时；点击Textview的显示的结果为：

    public boolean dispatchTouchEvent(MotionEvent ev) {
        // TODO Auto-generated method stub
        switch (ev.getAction()) {
        case MotionEvent.ACTION_DOWN:
            Log.v("TAG", "Activity_dis: ACTION_DOWN" + MotionEvent.ACTION_DOWN);
            break;
        case MotionEvent.ACTION_UP:
            Log.v("TAG", "Activity_dis: ACTION_UP" + MotionEvent.ACTION_UP);
            break;
        default:
            break;
        }
        Log.v("TAG", "Activity_dis: " + super.dispatchTouchEvent(ev));
        return false;  //即这里改为False时
    }

1 04-28 01:14:25.467: V/TAG(5884): Activity_dis: ACTION_DOWN0
2 04-28 01:14:25.467: V/TAG(5884): TextView: ACTION_DOWN0         只能获取到一次Down事件
3 04-28 01:14:25.467: V/TAG(5884): Activity_dis: false
4 04-28 01:14:25.571: V/TAG(5884): Activity_dis: ACTION_UP1
5 04-28 01:14:25.571: V/TAG(5884): Activity_dis: false

当dispatchTouchEvent的返回值为true时；点击Textview的显示的结果为：

1 04-28 01:17:00.398: V/TAG(5995): Activity_dis: ACTION_DOWN0
2 04-28 01:17:00.398: V/TAG(5995): TextView: ACTION_DOWN0                效果没见发生变化
3 04-28 01:17:00.398: V/TAG(5995): Activity_dis: false
4 04-28 01:17:00.418: V/TAG(5995): Activity_dis: ACTION_UP1
5 04-28 01:17:00.418: V/TAG(5995): Activity_dis: false

下面在Activity中添加onThouchEvent事件详细代码见下面：

 1 package com.domo.touch;
 2 
 3 import android.app.Activity;
 4 import android.os.Bundle;
 5 import android.util.Log;
 6 import android.view.MotionEvent;
 7 import android.view.View;
 8 import android.view.View.OnTouchListener;
 9 import android.widget.TextView;
10 
11 public class TestTouchActivity extends Activity {
12     /** Called when the activity is first created. */
13     @Override
14     public void onCreate(Bundle savedInstanceState) {
15         super.onCreate(savedInstanceState);
16         setContentView(R.layout.main);
17 
18         TextView textView = (TextView) findViewById(R.id.textview);
19         textView.setOnTouchListener(new OnTouchListener() {
20 
21             public boolean onTouch(View v, MotionEvent event) {
22                 // TODO Auto-generated method stub
23                 switch (event.getAction()) {
24                 case MotionEvent.ACTION_DOWN:
25                     Log.v("TAG", "TextView: ACTION_DOWN" + MotionEvent.ACTION_DOWN);
26                     break;
27                 case MotionEvent.ACTION_UP:
28                     Log.v("TAG", "TextView : ACTION_UP" + MotionEvent.ACTION_UP);
29                     break;
30                 default:
31                     break;
32                 }
33                 
34                 return false;
35             }
36         });
37     }
38 
39     @Override
40     public boolean dispatchTouchEvent(MotionEvent ev) {
41         // TODO Auto-generated method stub
42         switch (ev.getAction()) {
43         case MotionEvent.ACTION_DOWN:
44             Log.v("TAG", "Activity_dis: ACTION_DOWN" + MotionEvent.ACTION_DOWN);
45             break;
46         case MotionEvent.ACTION_UP:
47             Log.v("TAG", "Activity_dis: ACTION_UP" + MotionEvent.ACTION_UP);
48             break;
49         default:
50             break;
51         }
52         Log.v("TAG", "Activity_dis: " + super.dispatchTouchEvent(ev));
53         return true;
54     }
55 
56     @Override
57     public boolean onTouchEvent(MotionEvent event) {
58         // TODO Auto-generated method stub
59         switch (event.getAction()) {
60         case MotionEvent.ACTION_DOWN:
61             Log.v("TAG", "onTouchEvent: ACTION_DOWN" + MotionEvent.ACTION_DOWN);
62             break;
63         case MotionEvent.ACTION_UP:
64             Log.v("TAG", "onTouchEvent: ACTION_UP" + MotionEvent.ACTION_UP);
65             break;
66         default:
67             break;
68         }
69         Log.v("TAG", "onTouchEvent: " + super.onTouchEvent(event));
70         return super.onTouchEvent(event);
71     }
72     
73 }

点击Textview结果：

1 04-28 01:22:11.957: V/TAG(6152): Activity_dis: ACTION_DOWN0
2 04-28 01:22:11.957: V/TAG(6152): TextView: ACTION_DOWN0
3 04-28 01:22:11.957: V/TAG(6152): onTouchEvent: ACTION_DOWN0          还是只有一次
4 04-28 01:22:11.957: V/TAG(6152): onTouchEvent: false
5 04-28 01:22:11.957: V/TAG(6152): Activity_dis: false
6 04-28 01:22:12.047: V/TAG(6152): Activity_dis: ACTION_UP1
7 04-28 01:22:12.047: V/TAG(6152): onTouchEvent: ACTION_UP1
8 04-28 01:22:12.058: V/TAG(6152): onTouchEvent: false
9 04-28 01:22:12.058: V/TAG(6152): Activity_dis: false

把return super.onTouchEvent(event);改为 return false;

点击Textview结果：

04-28 01:25:17.378: V/TAG(6152): Activity_dis: ACTION_DOWN0
04-28 01:25:17.378: V/TAG(6152): TextView: ACTION_DOWN0 依然只有一次
04-28 01:25:17.378: V/TAG(6152): onTouchEvent: ACTION_DOWN0
04-28 01:25:17.378: V/TAG(6152): onTouchEvent: false
04-28 01:25:17.378: V/TAG(6152): Activity_dis: false
04-28 01:25:17.468: V/TAG(6152): Activity_dis: ACTION_UP1
04-28 01:25:17.468: V/TAG(6152): onTouchEvent: ACTION_UP1
04-28 01:25:17.468: V/TAG(6152): onTouchEvent: false
04-28 01:25:17.468: V/TAG(6152): Activity_dis: false

再把public boolean dispatchTouchEvent(MotionEvent ev) { 也返回 return false;

04-28 01:27:16.178: V/TAG(6304): Activity_dis: ACTION_DOWN0
04-28 01:27:16.178: V/TAG(6304): TextView: ACTION_DOWN0 依然只有一次

04-28 01:27:16.178: V/TAG(6304): onTouchEvent: ACTION_DOWN0
04-28 01:27:16.178: V/TAG(6304): onTouchEvent: false
04-28 01:27:16.178: V/TAG(6304): Activity_dis: false
04-28 01:27:16.298: V/TAG(6304): Activity_dis: ACTION_UP1
04-28 01:27:16.298: V/TAG(6304): onTouchEvent: ACTION_UP1
04-28 01:27:16.298: V/TAG(6304): onTouchEvent: false
04-28 01:27:16.298: V/TAG(6304): Activity_dis: false

textView.setOnTouchListener(new OnTouchListener() {

   public boolean onTouch(View v, MotionEvent event) {
    // TODO Auto-generated method stub
    switch (event.getAction()) {
    case MotionEvent.ACTION_DOWN:
     Log.v("TAG", "TextView: ACTION_DOWN" + MotionEvent.ACTION_DOWN);
     break;
    case MotionEvent.ACTION_UP:
     Log.v("TAG", "TextView : ACTION_UP" + MotionEvent.ACTION_UP);
     break;
    default:
     break;
    }

    return true; 把这里改成ture Textview才能监听到 TextView: ACTION_DOWN0及TextView : ACTION_UP1的动作。

04-28 01:36:26.057: V/TAG(6628): Activity_dis: ACTION_DOWN0
04-28 01:36:26.057: V/TAG(6628): TextView: ACTION_DOWN0
04-28 01:36:26.057: V/TAG(6628): Activity_dis: true
04-28 01:36:26.148: V/TAG(6628): Activity_dis: ACTION_UP1
04-28 01:36:26.148: V/TAG(6628): TextView : ACTION_UP1
04-28 01:36:26.148: V/TAG(6628): Activity_dis: true

详细也可以看下这

http://www.apkbus.com/forum.php?mod=viewthread&tid=44296

总结：

posted on 2012-04-28 01:06 simpleceo 阅读(809) 评论(0) 编辑收藏举报

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Android 各View的Touch事件

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