Android 在XML文件中添加View点击事件的监听:OnClickListener

在 SDK1.6 之后，Android就支持在XML文件中直接设置View点击时间的监听，这样又能少写一些代码咯，还能统一管理点击事件！！

下面是Android文档的说明：

XML Attributes

android:onClick
Since:
API Level

Name of the method in this View's context to invoke when the view is clicked. This name must correspond to a public method that takes exactly one parameter of type View. For instance, if you specify

android:onClick="sayHello"

,
you must declare a

public void sayHello(View v)

method of your context (typically, your Activity).

Must be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character.

This may also be a reference to a resource (in the form"

@[package:]type:name

") ortheme attribute (in the form"

?[package:][type:]name

")containing
a value of this type.

This corresponds to the global attribute resource symbolonClick.

看下具体的实现：

1.main.xml文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
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="ButtonTest"
android:id="@+id/Button01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="myClickListener"
/>
</LinearLayout>

2. MyOnClickListener.java文件

package com.ray.test;

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

public class MyOnClickListener extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
public void myClickListener(View target){
switch (target.getId()) {
case R.id.ButtonTest:
setTitle("ButtonTest");
break;
}
}
}