Android 在xml布局配置文件中给Button按钮添加事件

【转】http://blog.csdn.net/sky123123/article/details/5954446

在Android里面，添加Listener，具体步骤如下：

1.首先在layout里面定义Button并指定响应的Listener

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="<a href="http://schemas.android.com/apk/res/android"">http://schemas.android.com/apk/res/android"</a>
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<Button
android:text="Button01"
android:id="@+id/Button01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="myClickH1"
/>
<Button
android:text="Button02"
android:id="@+id/Button02"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="myClick2"
/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
</LinearLayout>

其中以下这两行就是新增的特性：

android:onClick="myClick1"

android:onClick="myClick2"

2.在活动里面定义public的方法myClick1、和myClick2

import android.app.Activity;
import android.os.Bundle;
import android.view.View;

public class TestOnClickListener extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

}
public void myClickHandler01(View v){
setTitle("myClick1");
}
public void myClick2(View v){
setTitle("myClick2");
}
}

import android.app.Activity;
import android.os.Bundle;
import android.view.View;

public class TestOnClickListener extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

}
public void myClick1(View v){
setTitle("myClick1");
}
public void myClick2(View v){
setTitle("myClick2");
}
}

也可以采用这种写法，将两个按钮设置到同一个Listener 代码如下所示：

android:onClick="onClick"

import android.app.Activity;
import android.os.Bundle;
import android.view.View;

public class TestOnClickListener extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
public void myClickHandler(View v){
switch (v.getId()) {
case R.id.Button01:
setTitle("Click1");
break;
case R.id.Button2:
setTitle("Click2");
break;
}
}
}

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