Android开发之onClick事件的三种写法(转)

 1 package a.a;
 2
 3 import android.app.Activity;
 4 import android.os.Bundle;
 5 import android.view.View;
 6 import android.widget.Button;
 7 import android.widget.EditText;
 8
 9 public class AActivity extends Activity {
10     /** Called when the activity is first created. */
11
12     EditText Ev1;
13
14     @Override
15     public void onCreate(Bundle savedInstanceState) {
16         super.onCreate(savedInstanceState);
17         setContentView(R.layout.main);
18
19         Ev1 = (EditText)findViewById(R.id.editText1);
20
21         //第一种方式
22         Button Btn1 = (Button)findViewById(R.id.button1);//获取按钮资源
23         Btn1.setOnClickListener(new Button.OnClickListener(){//创建监听
24             public void onClick(View v) {
25                 String strTmp = "点击Button01";
26                 Ev1.setText(strTmp);
27             }
28
29         });
30
31         //第二种方式
32         Button Btn2 = (Button) findViewById(R.id.button2);//获取按钮资源
33         Btn2.setOnClickListener(listener);//设置监听
34
35     }
36
37     Button.OnClickListener listener = new Button.OnClickListener(){//创建监听对象
38         public void onClick(View v){
39             String strTmp="点击Button02";
40             Ev1.setText(strTmp);
41         }
42
43     };
44
45
46     //第三种方式(Android1.6版本及以后的版本中提供了)
47     public void Btn3OnClick(View view){
48         String strTmp="点击Button03";
49         Ev1.setText(strTmp);
50
51     }
52 }

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="fill_parent"
 4     android:layout_height="fill_parent"
 5     android:orientation="vertical" >
 6
 7     <TextView
 8         android:layout_width="fill_parent"
 9         android:layout_height="wrap_content"
10         android:text="@string/hello" />
11
12     <Button
13         android:id="@+id/button1"
14         android:layout_width="wrap_content"
15         android:layout_height="wrap_content"
16         android:text="Button1" />
17
18     <Button
19         android:id="@+id/button2"
20         android:layout_width="wrap_content"
21         android:layout_height="wrap_content"
22         android:text="Button2" />
23
24  <Button
25         android:id="@+id/button3"
26         android:layout_width="wrap_content"
27         android:layout_height="wrap_content"
28         android:text="Button3"
29         android:onClick="Btn3OnClick"/>
30
31  <EditText
32      android:id="@+id/editText1"
33      android:layout_width="match_parent"
34      android:layout_height="wrap_content" >
35
36      <requestFocus />
37  </EditText>
38
39 </LinearLayout>