本文实例讲述了android编程获取系统隐藏服务实现锁屏的方法。分享给大家供大家参考,具体如下:
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:
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<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:
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<?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:
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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:
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/* ** ** copyright 2010, the android open source project ** ** 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. * {@hide} */ 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(); } |
希望本文所述对大家android程序设计有所帮助。