Android获取系统掩藏服务实现锁屏_Android

Android获取系统隐藏服务实现锁屏

实现原理：当按锁屏键时，会发出一个广播，当界面接收到一个广播就可以实现锁频。我们可以调用IDevicePolicyManager服务中的lockNow方法来发送一个广播实现锁屏。

IDevicePolicyManager是被系统隐藏掉的，需要通过反射还获取此服务。

?步骤：

1.创建MyAdmin的广播接收者继承DeviceAdminReceiver

2.通过反射 ,获取IDevicePolicyManager服务，IDevicePolicyManager通过AIDL来获取出来。

3.注册广播接收者为admin设备

4.获取服务中的方法

效果图：

????

注册MyAdmin广播接收者：

[html]?view plaincopy

<receiver?android:name=".MyAdmin">??
????<meta-data?android:name="android.app.device_admin"??
????????android:resource="@xml/my_admin"?/>??
????<intent-filter>??
????????<action?android:name="android.app.action.DEVICE_ADMIN_ENABLED"?/>??
????</intent-filter>??
</receiver>??

my_admin.xml：

[html]?view plaincopy

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

反射获取服务、注册权限、实现锁屏：

[java]?view plaincopy

public?class?LockActivity?extends?Activity?{??
????IDevicePolicyManager?mService;??
????@Override??
????public?void?onCreate(Bundle?savedInstanceState)?{??
????????super.onCreate(savedInstanceState);??
????????setContentView(R.layout.main);??
????}??
????//锁屏???
????public?void?lock(View?view){??
????????try?{??
????????????//通过反射获取到sdk隐藏的服务???
????????????Method?method?=?Class.forName("android.os.ServiceManager")??
????????????????????.getMethod("getService",?String.class);??
????????????IBinder?binder?=?(IBinder)?method.invoke(null,//激活服务??
????????????????????new?Object[]?{?Context.DEVICE_POLICY_SERVICE?});??
?????????????mService?=?IDevicePolicyManager.Stub.asInterface(binder);??
???????????????
?????????????//定义组件的名字???
?????????????ComponentName?mAdminName?=?new?ComponentName(this,?MyAdmin.class);??
??????????????
?????????????//注册权限??
?????????????if?(mService?!=?null)?{??
????????????????????//判断自定义的广播接受者?是不是被注册成?deviceadmin的权限???
????????????????????if?(!mService.isAdminActive(mAdminName))?{??
????????????????????????????????Intent?intent?=?new?Intent(??
????????????????????????????????DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);??
????????????????????????????????intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN,??
????????????????????????????????????????mAdminName);??
????????????????????????????????startActivity(intent);??
????????????????????????????}??
????????????????????//调用服务实现锁屏???
????????????????????mService.lockNow();??
????????????????????//设置解锁密码??
????????????????????mService.resetPassword("123",?0);??
?????????????}??
????????}?catch?(Exception?e)?{??
????????????e.printStackTrace();??
????????}???
????}??
}??

AIDL:

[java]?view plaincopy

/*?
**?
**?
**?Licensed?under?the?Apache?License,?Version?2.0?(the?"License");?
**?you?may?not?use?this?file?except?in?compliance?with?the?License.?
**?You?may?obtain?a?copy?of?the?License?at?
**?
**?????http://www.apache.org/licenses/LICENSE-2.0?
**?
**?Unless?required?by?applicable?law?or?agreed?to?in?writing,?software?
**?distributed?under?the?License?is?distributed?on?an?"AS?IS"?BASIS,?
**?WITHOUT?WARRANTIES?OR?CONDITIONS?OF?ANY?KIND,?either?express?or?implied.?
**?See?the?License?for?the?specific?language?governing?permissions?and?
**?limitations?under?the?License.?
*/??
??
package?android.app.admin;??
??
import?android.content.ComponentName;??
/**?
?*?Internal?IPC?interface?to?the?device?policy?service.?
[email protected]}?
?*/??
interface?IDevicePolicyManager?{??
????void?setPasswordQuality(in?ComponentName?who,?int?quality);??
????int?getPasswordQuality(in?ComponentName?who);??
??????
????void?setPasswordMinimumLength(in?ComponentName?who,?int?length);??
????int?getPasswordMinimumLength(in?ComponentName?who);??
??????
????boolean?isActivePasswordSufficient();??
????int?getCurrentFailedPasswordAttempts();??
??????
????void?setMaximumFailedPasswordsForWipe(in?ComponentName?admin,?int?num);??
????int?getMaximumFailedPasswordsForWipe(in?ComponentName?admin);??
??????
????boolean?resetPassword(String?password,?int?flags);??
??????
????void?setMaximumTimeToLock(in?ComponentName?who,?long?timeMs);??
????long?getMaximumTimeToLock(in?ComponentName?who);??
??????
????void?lockNow();??
??????
????void?wipeData(int?flags);??
??????
????void?setActiveAdmin(in?ComponentName?policyReceiver);??
????boolean?isAdminActive(in?ComponentName?policyReceiver);??
????List<ComponentName>?getActiveAdmins();??
????boolean?packageHasActiveAdmins(String?packageName);??
????void?removeActiveAdmin(in?ComponentName?policyReceiver);??
??????
????void?setActivePasswordState(int?quality,?int?length);??
????void?reportFailedPasswordAttempt();??
????void?reportSuccessfulPasswordAttempt();??
}??