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。
