Android-利用设备管理器来实现锁屏功能并可一键自我卸载

设备管理器操作步骤

<receiver
android:name="com.lmk.lockscreen.DeviceAdminSample"
android:description="@string/sample_device_admin_description"
android:label="@string/sample_device_admin"
android:permission="android.permission.BIND_DEVICE_ADMIN" >
<meta-data
android:name="android.app.device_admin"
android:resource="@xml/device_admin_sample" />

<intent-filter>
<action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
</intent-filter>
</receiver>

<string name="activity_sample_device_admin">设备管理员</string>
<string name="sample_device_admin_description">开启设备管理员，不开扣2000元</string>
<string name="sample_device_admin">管理员</string>

<device-admin xmlns:android="http://schemas.android.com/apk/res/android" >

<uses-policies>
<limit-password />
<watch-login />
<reset-password />
<force-lock />
<wipe-data />
<expire-password />
<encrypted-storage />
<disable-camera />
</uses-policies>

</device-admin>

现在我们利用设备管理器来进行对手机的锁屏功能

<span style="font-size:14px;">public void lockScreen(View v) {
// 没激活设备管理员就提醒
ComponentName who = new ComponentName(this, DeviceAdminSample.class);
DevicePolicyManager dpm = (DevicePolicyManager) getSystemService(DEVICE_POLICY_SERVICE);
if(dpm.isAdminActive(who)){

dpm.lockNow();
finish();
}else{
//帮助打开激活设备管理器的界面
// Launch the activity to have the user enable our admin.
Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, who);
intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION,
"设备管理器。。。");
startActivityForResult(intent, 1);
}
}</span>

<span style="font-size:14px;">public void RemoveApp(View v) {
DevicePolicyManager dpm = (DevicePolicyManager) getSystemService(DEVICE_POLICY_SERVICE);
ComponentName who=new ComponentName(this, DeviceAdminSample.class);
dpm.removeActiveAdmin(who);
// 调用卸载的页面，找卸载的意图
Intent intent = new Intent();
intent.setAction("android.intent.action.DELETE");
intent.addCategory("android.intent.category.DEFAULT");
intent.setData(Uri.parse("package:"+getPackageName()));
startActivityForResult(intent, 0);

}</span>