Android普通应用升系统应用系统权限 Android普通应用升级为系统应用并获取系统权限的操作
Mr.Jonas 人气:0有时候使用某些api需要使用系统权限,如调用PackageInstaller的相关接口,需要android.permission.INSTALL_PACKAGES权限,该权限系统只会授权给系统应用,此时可以考虑将我们的应用升级为系统应用,升级为系统应用有两种方法:
1、将apk放到/system/app目录下,重启手机即可,此方法比较粗暴,而且需要修改/system目录的读写权限,因此需要root,而且随着Android系统版本对权限管理越来越严,root和修改读写权限更繁琐和复杂
2、添加sharedUserId="android.uid.system"配置,同时使用系统签名对apk进行重签名,安装后即有系统权限,此方法需要获取到系统签名,但通常厂商开发的rom都不会公开签名,因此如果针对某些自己集成系统的需求,可以使用此方案。
下面针对第2种方案进行讲解。
1、首先需要在menifest文件中添加sharedUserId="android.uid.system"配置,如下
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.google.example" android:sharedUserId="android.uid.system">
2、添加需要的使用的系统权限,如
<uses-permission android:name="android.permission.INSTALL_PACKAGES" />
3、使用系统签名对apk进行签名,首先需要打未签名的包,Android Studio环境下点击右侧Gradle按钮,弹出目录,打开Tasks->build->assemble...,其中assemble开头的几项即是打包任务,双击相应项即可获取相应的包
接着要获取系统签名,找到系统签名文件“platform.pk8”和“platform.x509.pem”,在系统源码路径下
签名文件路径:android/build/target/product/security/
准备好签名工具:“signapk.jar”
位置:android/prebuilts/sdk/tools/lib
将未签名的apk、签名文件和签名工具放在同一路径下,开启终端,cd到该目录,运行如下命令即可得到带系统签名的apk
java -jar signapk.jar platform.x509.pem platform.pk8 Demo.apk signedDemo.apk
以上的方法相对还是比较繁琐,而且不便于调试,可以将系统签名打入keystore,使用该keystore即可在Android Studio环境下生成带系统签名的apk
1、首先需要生成keystore文件,生成过程在此省略,可自行百度
2、下载keytool-importkeypair,https://github.com/getfatday/keytool-importkeypair/
3、该操作需要linux系统,并安装jdk,win10环境下可以开启“基于Lunix的Windows子系统”,不需要去折腾安装虚拟机或者系统。当如,如果兄dei你已经有Linux系统或者是mac,那么恭喜你,省了很多需要折腾的步骤
4、将keystore、platform.pk8、platform.x509.pem、keytool-importkeypair放在同一目录下,开启终端,cd到此目录,运行如下命令即可将系统签名打入keystore
/keytool-importkeypair -k ./demo.keystore -p password -pk8 platform.pk8 -cert platform.x509.pem -alias demoAlias
解释:-P后接keystore密码,-alias后接key alias
5、运行结束即会在当前目录下生成带有系统签名的keystore,使用此keystore安装Android Studio打包流程打包即可得到带系统权限的apk
补充知识:Android 系统级应用守护进程
我就废话不多说了,还是直接看代码吧!
--- a/frameworks/base/packages/SystemUI/src/com/android/systemui/SystemUIApplication.java +++ b/frameworks/base/packages/SystemUI/src/com/android/systemui/SystemUIApplication.java @@ -16,24 +16,51 @@ package com.android.systemui; +import android.app.ActivityManager; +import android.app.ActivityManager.RunningAppProcessInfo; import android.app.Application; import android.app.Instrumentation; import android.content.BroadcastReceiver; import android.content.Context; +import android.content.ComponentName; import android.content.Intent; import android.content.IntentFilter; import android.content.res.Configuration; +import android.database.ContentObserver; +import android.net.Uri; +import android.os.Build; +import android.os.Handler; import android.os.Process; import android.os.PowerManager; import android.os.SystemClock; import android.os.SystemProperties; import android.os.UserHandle; import android.util.Log; - +import java.util.List; +import java.util.Calendar; import com.android.systemui.stackdivider.Divider; import java.util.HashMap; import java.util.Map; +import java.util.Objects; +import java.io.BufferedReader; +import java.io.File; +import java.io.FileReader; +import java.io.FileWriter; +import java.io.IOException; +import java.text.SimpleDateFormat; +import java.util.Date; +import java.util.Locale; + +import java.io.FileInputStream; +import java.io.FileNotFoundException; +import java.io.FileOutputStream; +import java.io.InputStream; +import java.io.PrintWriter; +import java.math.BigInteger; +import java.security.MessageDigest; +import java.security.NoSuchAlgorithmException; +import java.util.Random; /** * Application class for SystemUI. @@ -42,6 +69,8 @@ public class SystemUIApplication extends Application { private static final String TAG = "SystemUIService"; private static final boolean DEBUG = false; + + private Context mContext; /** * The classes of the stuff to start. @@ -86,6 +115,8 @@ public class SystemUIApplication extends Application { // application theme in the manifest does only work for activities. Keep this in sync with // the theme set there. setTheme(R.style.systemui_theme); + + mContext = getApplicationContext(); SystemUIFactory.createFromConfig(this); @@ -143,6 +174,7 @@ public class SystemUIApplication extends Application { private static final String SETTING_SYSTEM = "tchip.provider.setting.system"; private static final String SETTING_SECURE = "tchip.provider.setting.secure"; private static final String SETTING_GLOBAL = "tchip.provider.setting.global"; + private static final String BROADCAST_SCREENSHOT = "rk.android.screenshot.action"; private String valueContent = "0"; private MainReceiver mainReceiver; @@ -150,6 +182,10 @@ public class SystemUIApplication extends Application { android.util.Log.i("AZ", log); } + private void LDLog(String log) { + android.util.Log.i("LD", log); + } + public class MainReceiver extends BroadcastReceiver { @Override @@ -225,6 +261,18 @@ public class SystemUIApplication extends Application { intentDown.putExtra("android.intent.extra.KEY_CONFIRM", false); intentDown.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); context.startActivity(intentDown); + } else if (BROADCAST_SCREENSHOT.equals(action)) { + Intent intentScreenShot = new Intent("android.intent.action.SCREENSHOT"); + intentScreenShot.putExtra("path", intentScreenShot.getExtras().getString("path")); + intentScreenShot.putExtra("name", intentScreenShot.getExtras().getString("name")); + context.sendBroadcast(intentScreenShot); + } else if (BROADCAST_TIMETICK.equals(action)) { + //checkLaidianAppAlive(); + try{ + mHandler.removeCallbacks(laidianAppR); + }catch(Exception e){ + } + mHandler.postDelayed(laidianAppR, 1000); } } } @@ -326,4 +374,82 @@ public class SystemUIApplication extends Application { public SystemUI[] getServices() { return mServices; } + + + Handler mHandler = new Handler(); + private int laidianAppCheckTime = 3000; + Runnable laidianAppR = new Runnable(){ + + @Override + public void run() { + checkAppAlive(pkgName", "clsName"); + mHandler.postDelayed(laidianAppR, laidianAppCheckTime); + } + + }; + + private void checkAppAlive(String pkgName, String clsName){ + long startTime = System.currentTimeMillis(); + if(!isAppAlive(pkgName)){ + LDLog("checkAppAlive.start to start app... "); + try{ + ComponentName componentName = new ComponentName(pkgName, clsName); + Intent intent = new Intent(); + intent.setComponent(componentName); + intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); + mContext.startActivity(intent); + }catch(Exception e){ + + } + }else{ + LDLog("checkAppAlive.app is running... "); + } + LDLog("checkAppAlive.used time : " + (System.currentTimeMillis() - startTime)); + } + + public boolean isAppAlive(String packageName){ + //boolean isAlive = false; + //String command = "ps | grep " + packageName/* + " | busybox awk '{print $2}'"*/; + //String[] result = ExecCmd.getPackagePID(command); + //for(String str :result){ + // if(!"-1".equals(str)){ + // isAlive = true; + // } + //} + //return isAlive; + + // 获取正在运行的进程 + /*ActivityManager activityManager = (ActivityManager) mContext.getSystemService(Context.ACTIVITY_SERVICE); + List<RunningAppProcessInfo> appProcesses = activityManager.getRunningAppProcesses(); + + for (RunningAppProcessInfo appProcess : appProcesses) { + String[] pkgList = appProcess.pkgList; + for (String pckName : pkgList) { + if(packageName.equals(pckName)){ + return true; + } + + } + }*/ + ActivityManager am = (ActivityManager) mContext.getSystemService(Context.ACTIVITY_SERVICE); + List<ActivityManager.RecentTaskInfo> recentTasks = am.getRecentTasks(30, ActivityManager.RECENT_IGNORE_UNAVAILABLE + | ActivityManager.RECENT_INCLUDE_PROFILES); + + for (ActivityManager.RecentTaskInfo recentInfo : recentTasks){ + //if (recentInfo.origActivity != null) { + String pckName = recentInfo.baseIntent.getComponent().getPackageName(); + LDLog("isAppAlive.packageName=" + pckName); + if(packageName.equals(pckName)){ + return true; + } + //} + } + return false; + } + }
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