Android ToggleButton:狀态切換的Button
Android ToggleButton和Android Button類似,但是ToggleButton提供了一種選擇機制,可以表達Button處于何種狀态,比如常見的WiFi打開或者關閉狀态等等這種類似與非門的狀态機。
标準的Android ToggleButton樣式簡單,如果要實作自定義的、表達力豐富的ToggleButton,其中一個方式就是寫selector.xml檔案作為ToggleButton的background,現在寫一個例子。
布局檔案activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
tools:context="zhangphil.demo.MainActivity">
<ToggleButton
android:id="@+id/toggleButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:checked="true"
android:textOff="關閉"
android:textOn="打開"
android:background="@drawable/selector"/>
</RelativeLayout>
activity_main.xml需要的、位于drawable目錄下的selector.xml檔案:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@android:color/darker_gray" android:state_checked="false" />
<item android:drawable="@android:color/holo_green_light" android:state_checked="true" />
</selector>
上層Java代碼:
package zhangphil.demo;
import android.app.Activity;
import android.os.Bundle;
import android.widget.CompoundButton;
import android.widget.Toast;
import android.widget.ToggleButton;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ToggleButton mToggleButton = (ToggleButton) findViewById(R.id.toggleButton);
mToggleButton.setOnCheckedChangeListener(mOnCheckedChangeListener);
}
private ToggleButton.OnCheckedChangeListener mOnCheckedChangeListener = new ToggleButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
String s="";
if(isChecked)
s="打開";
else
s="關閉";
Toast.makeText(getApplication(),s,Toast.LENGTH_SHORT).show();
}
};
}
代碼運作結果如圖:
附錄文章:
1,《Android Segmented RadioButton》連結位址:
http://blog.csdn.net/zhangphil/article/details/514416772,《Android選項切換條SHSegmentControl》連結位址:
http://blog.csdn.net/zhangphil/article/details/49720805