Android11.0系统中实现静默安装并启动App以及静默卸载

• 静默安装并启动App以及静默卸载
• • 修改PackageInstaller
  • 第三方App请求静默安装及卸载

    静默安装并启动App以及静默卸载

    本文描述Android11中通过修改系统PackageInstaller应用支持静默安装App，并启动安装的App。

    修改PackageInstaller

    PackageInstaller是系统中专门负责app安装的App，静默安装逻辑添加到此应用中，应用所在路径 /frameworks/base/packages/PackageInstaller/src/com/android/packageinstaller/

    1. 添加SilenceInstallManager，路径为 /frameworks/base/packages/PackageInstaller/src/com/android/packageinstaller/SilenceInstallManager.java；

    package com.android.packageinstaller;
    import android.annotation.SuppressLint;
    import android.app.PendingIntent;
    import android.content.Context;
    import android.content.Intent;
    import android.content.pm.PackageInfo;
    import android.content.pm.PackageInstaller;
    import android.content.pm.PackageManager;
    import android.content.pm.PackageParser;
    import android.content.pm.ResolveInfo;
    import android.os.AsyncTask;
    import android.os.Handler;
    import android.os.Message;
    import android.util.ArrayMap;
    import android.util.Log;
    import androidx.annotation.NonNull;
    import com.android.internal.content.PackageHelper;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.OutputStream;
    import java.util.List;
    import android.content.pm.IPackageDeleteObserver;
    final class SilenceInstallManager {
        private static final String TAG = "SilenceInstallManager";
        private static final int MSG_WHAT_INSTALL_FINISH_SUCCESS = 0;
        private static final int MSG_WHAT_INSTALL_FINISH_FAIL = 1;
        private static final int MSG_WHAT_UNINSTALL_COMPLETE = 2;
        private Context mContext;
        @SuppressLint("NewApi")
        private ArrayMap InstallAppInfoMap = new ArrayMap<>();
        private static volatile SilenceInstallManager INSTANCE;
        private SilenceInstallManager(Context context) {
            mContext = context;
        }
        public static SilenceInstallManager getInstance(Context context) {
            if (null == INSTANCE) {
                synchronized (SilenceInstallManager.class) {
                    if (null == INSTANCE) {
                        INSTANCE = new SilenceInstallManager(context.getApplicationContext());
                    }
                }
            }
            return INSTANCE;
        }
        @SuppressLint("NewApi")
        private PackageInstaller.SessionCallback mSessionCallback = new PackageInstaller.SessionCallback() {
            @Override
            public void onCreated(int sessionId) {
                Log.d(TAG, "onCreated---->" + sessionId);
            }
            @Override
            public void onBadgingChanged(int sessionId) {
    //            Log.w(TAG, "SilenceInstallReceiver onBadgingChanged---->" + sessionId);
            }
            @Override
            public void onActiveChanged(int sessionId, boolean active) {
    //            Log.w(TAG, "SilenceInstallReceiver onActiveChanged---->" + sessionId + "  active--->" + active);
            }
            @Override
            public void onProgressChanged(int sessionId, float progress) {
    //            Log.w(TAG, "SilenceInstallReceiver onProgressChanged---->" + sessionId + "  progress--->" + progress);
            }
            @Override
            public void onFinished(int sessionId, boolean success) {
                Log.d(TAG, "onFinished---->" + sessionId + "  success--->" + success);
                Message msg = Message.obtain();
                msg.what = MSG_WHAT_INSTALL_FINISH_SUCCESS;
                msg.arg1 = sessionId;
                msg.obj = success;
                mHandler.sendMessage(msg);
            }
        };
        @SuppressLint("HandlerLeak")
        private Handler mHandler = new Handler() {
            @Override
            public void dispatchMessage(@NonNull Message msg) {
                mContext.getPackageManager().getPackageInstaller().unregisterSessionCallback(mSessionCallback);
                if (msg.what == MSG_WHAT_INSTALL_FINISH_SUCCESS) {
                    boolean result = (boolean) msg.obj;
                    int sessionId = msg.arg1;
                    InstallAppInfo info = InstallAppInfoMap.remove(sessionId);
                    if (result) {
                        Log.d(TAG, "install success");
                        if (null != info) {
                            if (info.isLaunch && null != info.info && null != info.info.packageName && !"".equals(info.info.packageName)) {
                                launchApp(info.info.packageName);
                            }
                            File f = new File(info.filePath);
                            if (f.exists()) {
                                f.delete();
                            }
                        }
                    } else {
                        Log.d(TAG, "install fail");
                    }
                } else if (msg.what == MSG_WHAT_INSTALL_FINISH_FAIL) {
                    int sessionId = msg.arg1;
                    if (sessionId != -1) {
                        InstallAppInfoMap.remove(sessionId);
                    }
                    Log.d(TAG, "install fail");
                } else if (msg.what == MSG_WHAT_UNINSTALL_COMPLETE) {
                    Log.d(TAG, "uninstall complete--->" + msg.arg1);
                    if (msg.arg1 == PackageManager.DELETE_SUCCEEDED) {
                        Log.d(TAG, "delete succeeded");
                    } else {
                        Log.d(TAG, "delete fail");
                    }
                }
            }
        };
        public void silenceInstall(String appFilePath, boolean launch) {
            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
                mContext.getPackageManager().getPackageInstaller().registerSessionCallback(mSessionCallback);
                PackageInstaller.SessionParams params = new PackageInstaller.SessionParams(
                        PackageInstaller.SessionParams.MODE_FULL_INSTALL);
                params.setInstallAsInstantApp(false);
                params.setInstallReason(PackageManager.INSTALL_REASON_USER);
                File file = new File(appFilePath);
                if (!file.exists()) {
                    sendFailMsg(-1);
                    return;
                }
                try {
                    PackageParser.PackageLite pkg = PackageParser.parsePackageLite(file, 0);
                    params.setAppPackageName(pkg.packageName);
                    params.setInstallLocation(pkg.installLocation);
                    params.setSize(
                            PackageHelper.calculateInstalledSize(pkg, false, params.abiOverride));
                } catch (PackageParser.PackageParserException e) {
                    Log.e(TAG, "Cannot parse package " + file + ". Assuming defaults.");
                    Log.e(TAG,
                            "Cannot calculate installed size " + file + ". Try only apk size.");
                    params.setSize(file.length());
                } catch (IOException e) {
                    Log.e(TAG,
                            "Cannot calculate installed size " + file + ". Try only apk size.");
                    params.setSize(file.length());
                }
                try {
                    PackageInfo mPkgInfo = PackageUtil.getPackageInfo(mContext, file, PackageManager.GET_PERMISSIONS);
                    int mSessionId = mContext.getPackageManager().getPackageInstaller().createSession(params);
                    InstallAppInfo installAppInfo = new InstallAppInfo(mSessionId, appFilePath, mPkgInfo, launch);
                    InstallAppInfoMap.put(mSessionId, installAppInfo);
                    InstallingAsyncTask mInstallingTask = new InstallingAsyncTask(mContext, appFilePath, mSessionId);
                    mInstallingTask.execute();
                } catch (IOException e) {
                    e.printStackTrace();
                    sendFailMsg(-1);
                }
            }
        }
        private void sendFailMsg(int sessionId) {
            Message msg = Message.obtain();
            msg.what = MSG_WHAT_INSTALL_FINISH_FAIL;
            msg.arg1 = sessionId;
            mHandler.sendMessage(msg);
        }
        @SuppressLint("NewApi")
        private final class InstallingAsyncTask extends AsyncTask {
            private Context mContext;
            private String mAppPath;
            private int mSessionId;
            public InstallingAsyncTask(Context context, String appPath, int sessionId) {
                mContext = context;
                mAppPath = appPath;
                mSessionId = sessionId;
            }
            @Override
            protected PackageInstaller.Session doInBackground(Void... params) {
                PackageInstaller.Session session;
                try {
                    session = mContext.getPackageManager().getPackageInstaller().openSession(mSessionId);
                } catch (IOException e) {
                    return null;
                }
                session.setStagingProgress(0);
                try {
                    File file = new File(mAppPath);
                    try (InputStream in = new FileInputStream(file)) {
                        long sizeBytes = file.length();
                        try (OutputStream out = session
                                .openWrite("PackageInstaller", 0, sizeBytes)) {
                            byte[] buffer = new byte[1024 * 1024];
                            while (true) {
                                int numRead = in.read(buffer);
                                if (numRead == -1) {
                                    session.fsync(out);
                                    break;
                                }
                                if (isCancelled()) {
                                    session.close();
                                    break;
                                }
                                out.write(buffer, 0, numRead);
                                if (sizeBytes > 0) {
                                    float fraction = ((float) numRead / (float) sizeBytes);
                                    session.addProgress(fraction);
                                }
                            }
                        }
                    }
                    return session;
                } catch (IOException | SecurityException e) {
                    Log.e(TAG, "Could not write package", e);
                    session.close();
                    return null;
                }
            }
            @Override
            protected void onPostExecute(PackageInstaller.Session session) {
                if (session != null) {
                    Intent broadcastIntent = new Intent();
                    PendingIntent pendingIntent = PendingIntent.getBroadcast(
                            mContext,
                            1,
                            broadcastIntent,
                            PendingIntent.FLAG_UPDATE_CURRENT);
                    session.commit(pendingIntent.getIntentSender());
                    session.close();
                    Log.d(TAG, "send install PendingIntent----->");
                } else {
                    mContext.getPackageManager().getPackageInstaller().abandonSession(mSessionId);
                    sendFailMsg(mSessionId);
                    File f = new File(mAppPath);
                    if (f.exists()) {
                        f.delete();
                    }
                    Log.e(TAG, "copy fail delete file----->");
                }
                mContext = null;
                mAppPath = "";
                mSessionId = -1;
            }
        }
        private class InstallAppInfo {
            private int sessionId;
            private String filePath;
            private PackageInfo info;
            private boolean isLaunch;
            public InstallAppInfo(int sessionId, String filePath, PackageInfo info, boolean isLaunch) {
                this.sessionId = sessionId;
                this.filePath = filePath;
                this.info = info;
                this.isLaunch = isLaunch;
            }
            public int getSessionId() {
                return sessionId;
            }
            public String getFilePath() {
                return filePath;
            }
            public PackageInfo getInfo() {
                return info;
            }
            public boolean isLaunch() {
                return isLaunch;
            }
        }
        private void launchApp(String appPackageName) {
            Intent mLaunchIntent = mContext.getPackageManager().getLaunchIntentForPackage(appPackageName);
            if (mLaunchIntent != null) {
                List list = mContext.getPackageManager().queryIntentActivities(mLaunchIntent, 0);
                if (list != null && list.size() > 0) {
                    Log.d(TAG, "launch app--->");
                    mContext.startActivity(mLaunchIntent);
                }
            }
        }
        public void silenceUninstall(String packageName) {
            Log.i(TAG, "silenceUninstall--->" + packageName);
            PackageDeleteObserver observer = new PackageDeleteObserver();
            mContext.getPackageManager().deletePackage(packageName, observer, PackageManager.DELETE_ALL_USERS);
        }
        private class PackageDeleteObserver extends IPackageDeleteObserver.Stub {
            public void packageDeleted(String packageName, int returnCode) {
                Message msg = mHandler.obtainMessage(MSG_WHAT_UNINSTALL_COMPLETE);
                msg.arg1 = returnCode;
                msg.obj = packageName;
                mHandler.sendMessage(msg);
            }
        }
    }
    

    2. 添加SilenceInstallReceiver，路径为 /frameworks/base/packages/PackageInstaller/src/com/android/packageinstaller/SilenceInstallReceiver.java；

    package com.android.packageinstaller;
    import android.content.BroadcastReceiver;
    import android.content.Context;
    import android.content.Intent;
    import android.net.Uri;
    public class SilenceInstallReceiver extends BroadcastReceiver {
        public static final String SILENCE_INSTALL_APP = "com.android.packageinstaller.ACTION_SILENCE_INSTALL";
        public static final String SILENCE_INSTALL_KEY = "silence_install";
        public static final String IS_LAUNCH_KEY = "is_launch";
        public static final String APP_URI_KEY = "app_uri";
        @Override
        public void onReceive(Context context, Intent intent) {
            if (SILENCE_INSTALL_APP.equals(intent.getAction())) {
                Uri uri = intent.getParcelableExtra(APP_URI_KEY);
                boolean isLaunch = intent.getBooleanExtra(IS_LAUNCH_KEY, false);
                SilenceInstallManager.getInstance(context).silenceInstall(uri.getPath(), isLaunch);
            }
        }
    }
    

    3. InstallStart是PackageInstaller程序安装app的入口activity，修改InstallStart，添加静默安装逻辑分支，路径为 /frameworks/base/packages/PackageInstaller/src/com/android/packageinstaller/InstallStart.java；

    //********省略代码******
      protected void onCreate(@Nullable Bundle savedInstanceState) {
            //********省略代码******
            if (isSessionInstall) {
                nextActivity.setClass(this, PackageInstallerActivity.class);
            } else {
                Uri packageUri = intent.getData();
                if (packageUri != null && packageUri.getScheme().equals(
                        ContentResolver.SCHEME_CONTENT)) {
                    // [IMPORTANT] This path is deprecated, but should still work. Only necessary
                    // features should be added.
                    // Copy file to prevent it from being changed underneath this process
                    nextActivity.setClass(this, InstallStaging.class);
                } else if (packageUri != null && packageUri.getScheme().equals(
                        PackageInstallerActivity.SCHEME_PACKAGE)) {
                    nextActivity.setClass(this, PackageInstallerActivity.class);
                } else {
                    Intent result = new Intent();
                    result.putExtra(Intent.EXTRA_INSTALL_RESULT,
                            PackageManager.INSTALL_FAILED_INVALID_URI);
                    setResult(RESULT_FIRST_USER, result);
                    nextActivity = null;
                }
            }
           //安装请求中如果带静默安装标识，执行静默安装操作
            if (intent.getBooleanExtra(SilenceInstallReceiver.SILENCE_INSTALL_KEY, false)) {
                StagingAsyncAppTask mStagingTask = new StagingAsyncAppTask(intent.getBooleanExtra(SilenceInstallReceiver.IS_LAUNCH_KEY, false));
                mStagingTask.execute(getIntent().getData());
                return;
            }
            if (nextActivity != null) {
                startActivity(nextActivity);
            }
            finish();
    }
        @SuppressLint("NewApi")
        private final class StagingAsyncAppTask extends AsyncTask {
            private boolean mIsLaunch;
            public StagingAsyncAppTask(boolean isLaunch){
                mIsLaunch = isLaunch;
            }
            @Override
            protected File doInBackground(Uri... params) {
                Log.d(LOG_TAG, "copy file from user app start");
                if (params == null || params.length <= 0) {
                    return null;
                }
                Uri packageUri = params[0];
                try (InputStream in = getContentResolver().openInputStream(packageUri)) {
                    // Despite the comments in ContentResolver#openInputStream the returned stream can
                    // be null.
                    if (in == null) {
                        return null;
                    }
                    File mStagedFile = TemporaryFileManager.getStagedFile(InstallStart.this);
                    try (OutputStream out = new FileOutputStream(mStagedFile)) {
                        byte[] buffer = new byte[1024 * 1024];
                        int bytesRead;
                        while ((bytesRead = in.read(buffer)) >= 0) {
                            // Be nice and respond to a cancellation
                            out.write(buffer, 0, bytesRead);
                        }
                    }
                    return mStagedFile;
                } catch (IOException | SecurityException | IllegalStateException e) {
                    Log.w(LOG_TAG, "Error staging apk from content URI", e);
                }
                return null;
            }
            @Override
            protected void onPostExecute(File installFile) {
                if (null != installFile) {
                    // Now start the installation again from a file
                    Log.d(LOG_TAG, "copy file from user app finish");
                    Intent installIntent = new Intent(SilenceInstallReceiver.SILENCE_INSTALL_APP);
                    installIntent.putExtra(SilenceInstallReceiver.APP_URI_KEY, Uri.fromFile(installFile));
                    installIntent.putExtra(SilenceInstallReceiver.IS_LAUNCH_KEY, mIsLaunch);
                    installIntent.addFlags(Intent.FLAG_RECEIVER_INCLUDE_BACKGROUND);
                    installIntent.setPackage("com.android.packageinstaller");
                    sendBroadcast(installIntent);
                    Log.d(LOG_TAG, "send to install");
                } else {
                    Log.d(LOG_TAG, "copy file from user app fail");
                }
                finish();
            }
        }
    //********省略代码******
    

    4. UninstallerActivity是PackageInstaller程序卸载app的入口activity，修改UninstallerActivity，添加静默卸载逻辑分支，路径为 /frameworks/base/packages/PackageInstaller/src/com/android/packageinstaller/UninstallerActivity.java；

    //********省略代码******
    public void onCreate(Bundle icicle){
             //********省略代码******
            
            //添加静默卸载逻辑
            if (intent.getBooleanExtra(SilenceInstallReceiver.SILENCE_INSTALL_KEY, false)) {
                SilenceInstallManager.getInstance(this).silenceUninstall(mPackageName);
                return;
            }
            showConfirmationDialog();
    }
    //********省略代码******
    

    4. 修改PackageInstallerApplication，路径为 /frameworks/base/packages/PackageInstaller/src/com/android/packageinstaller/PackageInstallerApplication.java；

    //********省略代码******
    public class PackageInstallerApplication extends Application {
        @Override
        public void onCreate() {
            super.onCreate();
            PackageItemInfo.forceSafeLabels();
    		//添加管理类初始化
            SilenceInstallManager.getInstance(this);
        }
    }
    //********省略代码******
    

    5. 修改AndroidManifest.xml，路径为 /frameworks/base/packages/PackageInstaller/AndroidManifest.xml；

    //********省略代码******
    //添加后台启动activity权限
    
    //********省略代码******
    
                
                    
                
            
    //********省略代码******
    

    6. Android10开始，系统限制在没有用户交互的情况下在后台启动Activity，会输出如下信息

    Background activity start [callingPackage: com.android.packageinstaller; callingUid: 10069; isCallingUidForeground: false; callingUidHasAnyVisibleWindow: false; callingUidProcState: CACHED_EMPTY; isCallingUidPersistentSystemProcess: false; realCallingUid: 10069; isRealCallingUidForeground: false; realCallingUidHasAnyVisibleWindow: false; realCallingUidProcState: CACHED_EMPTY; isRealCallingUidPersistentSystemProcess: false; originatingPendingIntent: null; isBgStartWhitelisted: false; intent: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 pkg=com.qiyi.video cmp=com.qiyi.video/.WelcomeActivity }; callerApp: ProcessRecord{ba2b2ca 2471:com.android.packageinstaller/u0a69}]
    Abort background activity starts from 10069
    

    当开发的App切换到后台后，就无法进行应用安装请求，ActivityStarter.java中的shouldAbortBackgroundActivityStart()方法在判断是否能够启动activity，在这里添加修改逻辑处理，路径为 /frameworks/base/services/core/java/com/android/server/wm/ActivityStarter.java；

    //********省略代码******
    boolean shouldAbortBackgroundActivityStart(int callingUid, int callingPid,
                final String callingPackage, int realCallingUid, int realCallingPid,
                WindowProcessController callerApp, PendingIntentRecord originatingPendingIntent,
                boolean allowBackgroundActivityStart, Intent intent) {
    //********省略代码******
            // don't abort if the callingUid has SYSTEM_ALERT_WINDOW permission
            if (mService.hasSystemAlertWindowPermission(callingUid, callingPid, callingPackage)) {
                Slog.w(TAG, "Background activity start for " + callingPackage
                        + " allowed because SYSTEM_ALERT_WINDOW permission is granted.");
                return false;
            }
            
            //添加判断逻辑，通过allowed_Background标识决定是能够启动
            if (intent.getBooleanExtra("allowed_Background", false)) {
                Slog.w(TAG, "allowed_Background.");
                return false;
            }
        
           //********省略代码******
    }
    //********省略代码******
    

    第三方App请求静默安装及卸载

    1. 在开发的app中使用下面方法请求安装

        private void installTest() {
            String appPath = getExternalFilesDir(null).getAbsolutePath() + File.separator + "aiqiyi.apk";
            File appFile = new File(appPath);
            if (!appFile.exists()) {
                showToast("请在" + getExternalFilesDir(null).getAbsolutePath() + File.separator + "目录中放置升级文件");
                return;
            }
            Uri uri = FileProvider.getUriForFile(getApplicationContext(), getPackageName() + ".file_provider", appFile);
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                Intent installApkIntent = new Intent();
                installApkIntent.setAction(Intent.ACTION_VIEW);
                installApkIntent.addCategory(Intent.CATEGORY_DEFAULT);
                installApkIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                installApkIntent.setDataAndType(uri, "application/vnd.android.package-archive");
                installApkIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
                //设置静默安装标识
                installApkIntent.putExtra("silence_install", true);
                //设置安装完成是否启动标识
                installApkIntent.putExtra("is_launch", true);
                //设置后台中启动activity标识
                installApkIntent.putExtra("allowed_Background", true);
                if (getPackageManager().queryIntentActivities(installApkIntent, 0).size() > 0) {
                    startActivity(installApkIntent);
                }
            }
        }
    

    2. 在开发的app中使用下面方法请求卸载

        public boolean requestSilenceUninstall(Context context, String packageName) {
            if (null == packageName || "".equals(packageName)) {
                return false;
            }
            try {
                PackageInfo packinfo = context.getPackageManager().getPackageInfo(context.getPackageName(), PackageManager.GET_PERMISSIONS);
                String[] list = packinfo.requestedPermissions;
                boolean hasPermission = false;
                if (null != list) {
                    for (int i = 0; i < list.length; i++) {
                        if (Manifest.permission.QUERY_ALL_PACKAGES.equals(list[i])) {
                            hasPermission = true;
                            break;
                        }
                    }
                }
                if (!hasPermission) {
                    throw new RuntimeException("need permission " + Manifest.permission.QUERY_ALL_PACKAGES);
                }
            } catch (PackageManager.NameNotFoundException e) {
                throw new RuntimeException(e);
            }
            if (!checkExistForApp(context, packageName)) {
                return false;
            }
            Intent intent = new Intent(Intent.ACTION_DELETE);
            intent.setData(Uri.parse("package:" + packageName));
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            intent.putExtra("allowed_Background", true);
            intent.putExtra("silence_install", true);
            context.startActivity(intent);
            return true;
        }
    

     
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