Android一键锁屏开发全过程…

16lz 2023-05-28

原文地址：Android一键锁屏开发全过程【源码】【附图】 作者：狼毒花转载： http://smallsmile.iteye.com/blog/1374823

1、主程序代码：

Java代码

privateDevicePolicyManagerpolicyManager;
privateComponentNamecomponentName;
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.locklayout);
//获取设备管理服务
policyManager=(DevicePolicyManager)getSystemService(Context.DEVICE_POLICY_SERVICE);
//AdminReceiver继承自DeviceAdminReceiver
componentName=newComponentName(this,AdminReceiver.class);
mylock();
//killMyself，锁屏之后就立即kill掉我们的Activity，避免资源的浪费;
android.os.Process.killProcess(android.os.Process.myPid());
}

2、其中，mylock()为：

Java代码

privatevoidmylock(){
booleanactive=policyManager.isAdminActive(componentName);
if(!active){//若无权限
activeManage();//去获得权限
policyManager.lockNow();//并锁屏
}
if(active){
policyManager.lockNow();//直接锁屏
}
}

3、activeManage()代码为：

Java代码

privatevoidactiveManage(){
//启动设备管理(隐式Intent)-在AndroidManifest.xml中设定相应过滤器
Intentintent=newIntent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
//权限列表
intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN,componentName);
//描述(additionalexplanation)
intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION,"------其他描述------");
startActivityForResult(intent,0);
}

4、AndroidManifest.xml

Java代码 " quality="high" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer">

<?xmlversion="1.0"encoding="utf-8"?>
<manifestxmlns:android="http://schemas.android.com/apk/res/android"
package="cn.hnu"
android:versionCode="1"
android:versionName="1.0">
<applicationandroid:icon="@drawable/icon"android:label="@string/app_name">
<activityandroid:name=".LockFirst"
android:label="@string/app_name">
<intent-filter>
<actionandroid:name="android.intent.action.MAIN"/>
<categoryandroid:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<receiverandroid:name=".AdminReceiver"
android:label="@string/app_name"
android:description="@string/app_name"
android:permission="android.permission.BIND_DEVICE_ADMIN">
<meta-dataandroid:name="android.app.device_admin"
android:resource="@xml/lock_screen"/>
<intent-filter>
<action
android:name="android.app.action.DEVICE_ADMIN_ENABLED"/>
</intent-filter>
</receiver>
</application>
</manifest>

5、其中lock_screen.xml（lock_screen.xml文件放在res/xml文件夹下）代码为：

Java代码 " quality="high" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer">

<?xmlversion="1.0"encoding="UTF-8"?>
<device-admin
xmlns:android="http://schemas.android.com/apk/res/android">
<uses-policies>
<force-lock/>
<wipe-data/>
<reset-password/>
<limit-password/>
<watch-login/>
</uses-policies>
</device-admin>

请求权限界面

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