ApiDemos-----app----Activity---ToggleButton控件的学习
2012-10-18 14:39
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Android开发ToggleButton控件的学习
ToggleButton有两种状态:选中和未选择状态,并且需要为不同的状态设置不同的显示文本。首先先看一下效果:下面看一下ToggleButton的用法(相关的代码):
main.xml的布局文件
<?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">
<ImageView android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/bulb_off"
android:layout_gravity="center_horizontal" />
<ToggleButton android:id="@+id/toggleButton"
android:layout_width="140dip"
android:layout_height="wrap_content"
android:textOn="开灯"
android:textOff="关灯"
android:layout_gravity="center_horizontal" />
</LinearLayout>
ToggleButtonActivity类
package com.ljq.tb;
import android.app.Activity;
import android.os.Bundle;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.ToggleButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
public class ToggleButtonActivity extends Activity {
private ImageView imageView=null;
private ToggleButton toggleButton=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
imageView=(ImageView) findViewById(R.id.imageView);
toggleButton=(ToggleButton)findViewById(R.id.toggleButton);
toggleButton.setOnCheckedChangeListener(new OnCheckedChangeListener(){
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
toggleButton.setChecked(isChecked);
imageView.setImageResource(isChecked?R.drawable.bulb_on:R.drawable.bulb_off);
}
});
}
}
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