android Button的应用

import android.view.View;
import android.widget.Button;

private Button mButton1;

mButton1 =(Button) findViewById(R.id.myButton1);
mButton1.setOnClickListener(new Button.OnClickListener()
{
@Override
public void onClick(View v)
{
// TODO Auto-generated method stub
mTextView1.setText("Hi, Everyone!!");
}
});

//-----------------------------------------简洁的写法1-----------------------------------------
1.调用：
mButton1.setOnClickListener(myShowProgressBar);

2.实现：
Button.OnClickListener myShowProgressBar = new Button.OnClickListener()
{
public void onClick(View arg0)
{

}
};

//-----------------------------------------简洁的写法2-----------------------------------------
//创建一个按钮监听事件，然后设置每一个按钮的监听事件函数
1.在main.xml布局文件中定义3个按钮.

2.在main.java中添加监听事件的函数
OnClickListener listener;
listener = new OnClickListener() {

public void onClick(View arg0) {
// TODO Auto-generated method stub
myOnClick(arg0);
}
};

3.按钮绑定响应事件
findViewById(R.id.Button01).setOnClickListener(listener);
findViewById(R.id.Button02).setOnClickListener(listener);
findViewById(R.id.Button03).setOnClickListener(listener);
findViewById(R.id.Button04).setOnClickListener(listener);

4.监听事件的实现
private void myOnClick(View arg0) {
switch (arg0.getId()) {
case R.id.Button01:
Toast.makeText(this, "11111", Toast.LENGTH_LONG).show();
break;
case R.id.Button02:
Toast.makeText(this, "22222", Toast.LENGTH_LONG).show();
break;
case R.id.Button03:
Toast.makeText(this, "33333", Toast.LENGTH_LONG).show();
break;
case R.id.Button04:
Toast.makeText(this, "44444", Toast.LENGTH_LONG).show();
break;

default:
break;
}
}

//-----------------------------------------添加背景的图片-----------------------------------------
1.在drawable中添加两张图片 iconempty.png和iconfull.png

2.在drawable中添加btnstyle.xml文件，文件内容如下
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_focused="false" android:state_pressed="false"
android:drawable="@drawable/iconempty"></item>
<item android:state_focused="false" android:state_pressed="true"
android:drawable="@drawable/iconfull"></item>
</selector>

3.在main.xml中定义的Button
<Button android:id="@+id/ImageButton01"
android:background="@drawable/btnstyle"
android:layout_width="128px"
android:layout_height="128px"
android:text="颜色" >
</Button>

//-----------------------------------------让按钮失效-----------------------------------------
mButton1.setEnabled(false);

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