Android ToggleButton Example--开关按钮
Android ToggleButton Example
在 Android 中, “android.widget.ToggleButton” 是个特殊的类,可以渲染出一个“开关按钮” ,顾名思义,此“开关按钮”有“开”和“关”两种状态。
本教程将展现,将使用 xml 创建两个“开关按钮”和一个“普通按钮”,当用户点击“普通按钮”时,将展现两个“开关按钮”的当前状态。
1. Custom String
File : res/values/strings.xml
<?xml version="1.0" encoding="utf-8"?> <resources> <string name="app_name">ToggleButtonDemo</string> <string name="action_settings">Settings</string> <string name="toggle_turn_on">Turn On打开</string> <string name="toggle_turn_off">Turn Off关闭</string> <string name="btn_display">Display</string> </resources>
2. 开关按钮--ToggleButton
打开 “res/layout/activity_main.xml” 文件, 在“线性布局”中添加两个“开关按钮” 和一个“普通按钮”。
File : res/layout/activity_main.xm
<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" tools:context=".MainActivity" android:orientation="vertical"> <ToggleButton android:id="@+id/toggleButton1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="ToggleButton开关按钮" /> <ToggleButton android:id="@+id/toggleButton2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textOn="@string/toggle_turn_on" android:textOff="@string/toggle_turn_off" android:checked="true" /> <Button android:id="@+id/btnDisplay" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/btn_display" /> </LinearLayout>
注: toggleButton2 默认为选中状态,android:checked ="true"
3. Code Code
Inside activity “onCreate()” method, attach a click listeners on a normal button,
to display the current state of the toggle button.
File : MainActivity.java
package com.jiangge.togglebuttondemo; import android.os.Bundle; import android.app.Activity; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast; import android.widget.ToggleButton; public class MainActivity extends Activity { private ToggleButton toggleButton1,toggleButton2; private Button btnDisplay; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); addListenerOnButton(); } private void addListenerOnButton() { toggleButton1 = (ToggleButton) findViewById(R.id.toggleButton1); toggleButton2 = (ToggleButton) findViewById(R.id.toggleButton2); btnDisplay = (Button) findViewById(R.id.btnDisplay); btnDisplay.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { StringBuffer result = new StringBuffer(); result.append("toggleButton1 : ").append(toggleButton1.getText()); result.append("\ntoggleButton2 : ").append(toggleButton2.getText()); Toast.makeText(MainActivity.this, result.toString(), Toast.LENGTH_SHORT).show(); } }); } }
4、运行结果:
①、
②、
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再来一个例子:官方文档。
a ToggleButton with the android:onClick 属性:
<ToggleButton android:id="@+id/togglebutton" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textOn="Vibrate on" android:textOff="Vibrate off" android:onClick="onToggleClicked"/>
处理单击事件:
public void onToggleClicked(View view) { // Is the toggle on? boolean on = ((ToggleButton) view).isChecked(); if (on) { // Enable vibrate } else { // Disable vibrate } }
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参考文献:
1、官方文档
2、