ToggleButton用于切换程序中的某种状态。
ToggleButton有三个XML属性:android:checked,设置该按钮是否被选中,对应的方法为setChecked(boolean);
android:textOff,设置当按钮没有被选中时显示的文本;
android:textOn,设置当按钮没有被选中时显示的文本。
下面的例子示范动态控制布局的例子,随着按钮状态的改变,界面布局在水平和垂直布局之间切换。
XML源代码:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".ToggleButton" >
<ToggleButton
android:id="@+id/togglebutton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:checked="true"
android:textOff="横向排列"
android:textOn="纵向排列" />
<LinearLayout
android:id="@+id/layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button 1"
android:textSize="11pt" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button 1"
android:textSize="11pt" />
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button 1"
android:textSize="11pt" />
</LinearLayout>
</LinearLayout>
Java源代码:
package com.example.togglebutton;
import android.os.Bundle;
import android.app.Activity;
import android.view.*;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.LinearLayout;
import android.widget.ToggleButton;
public class ToggleButtonTest extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_toggle_button);
ToggleButton toggleButton = (ToggleButton) findViewById(R.id.togglebutton);
final LinearLayout layout = (LinearLayout) findViewById(R.id.layout);
toggleButton.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
// TODO Auto-generated method stub
if (arg1)
layout.setOrientation(1);
else
layout.setOrientation(0);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_toggle_button, menu);
return true;
}
}