Android ToggleButton:状态切换的Button



Android ToggleButton:状态切换的Button

Android ToggleButton和Android Button类似,但是ToggleButton提供了一种选择机制,可以表达Button处于何种状态,比如常见的WiFi打开或者关闭状态等等这种类似与非门的状态机。
标准的Android ToggleButton样式简单,如果要实现自定义的、表达力丰富的ToggleButton,其中一个方式就是写selector.xml文件作为ToggleButton的background,现在写一个例子。
布局文件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="关闭"
        android:textOn="打开"
        android:background="@drawable/selector"/>
</RelativeLayout>


activity_main.xml需要的、位于drawable目录下的selector.xml文件:

<?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>


上层Java代码:

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="打开";
            else
                s="关闭";

            Toast.makeText(getApplication(),s,Toast.LENGTH_SHORT).show();
        }
    };
}


代码运行结果如图:


附录文章:

1,《Android Segmented RadioButton》链接地址:http://blog.csdn.net/zhangphil/article/details/51441677
2,《Android选项切换条SHSegmentControl》链接地址:http://blog.csdn.net/zhangphil/article/details/49720805

posted on 2016-06-20 14:38  疯子123  阅读(693)  评论(0编辑  收藏  举报

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