Android6.0关于预置三方app卸载（二） 调用接口安装

之前的博客也分析过如何安装三方app，是在第一次开机时将system/third-app下面的apk文件copy到data/app下。这样apk卸载后，恢复出厂设置又能安装上。但是会低概率的出现有的app安装有问题，不知道什么原因，具体是应用启动的时候加载资源出了问题，后续我们再深入资源系统研究下，这里先给出一个临时方案。

就是模仿installPackageAsUser接口来安装应用，就是先copy apk到data/app下，然后再装载到PKMS中。

我们再PKMS的systemReady方法最后添加如下代码，第一次开机调用installThirdApps方法

        if(isFirstBoot()){           Log.v(TAG, "It's first boot, install the third apps");           installThirdApps();        }

installThirdApps，就是扫描system/third_app下的apk文件，调用startInstall安装

    private void installThirdApps(){        //the source directory not exists        File storeDir = new File("/system/third_app");        if(!storeDir.exists()){            Log.e(TAG,"/system/third_app is not exist");            return;        }        //get the apk files in /system/third_app        String apkDirFilesNames[] = storeDir.list();        if(apkDirFilesNames == null){            Log.e(TAG,"apk file name is null");            return;        }        for(int i = 0; i < apkDirFilesNames.length; i++){            File srcFileDir = new File("/system/third_app", apkDirFilesNames[i]);            Log.v(TAG,"srcFile=" + srcFileDir);            String srcFileNames[] = srcFileDir.list();            for(int j = 0; j < srcFileNames.length; j++) {                File srcFile = new File(srcFileDir, srcFileNames[j]);                startInstall(srcFile);            }        }    }

startInstall函数就是模仿installPackageAsUser接口，来发送msg_copy消息，将apk复制到data/app下面，然后开始装载apk到PKMS中。

    private void startInstall(File originFile) {        //String originPath = "/system/third_app/MOffice/MOffice.apk";        VerificationParams verificationParams = new VerificationParams(null,            null, null, VerificationParams.NO_UID, null);        int callingUid = UserHandle.getCallingUserId();        verificationParams.setInstallerUid(callingUid);        UserHandle user = new UserHandle(callingUid);                                //final File originFile = new File(originPath);        final OriginInfo origin = OriginInfo.fromUntrustedFile(originFile);        final Message msg_copy = mHandler.obtainMessage(INIT_COPY);        InstallParams installParams = new InstallParams(origin, null, null, 0, null,                null, verificationParams, user, null, null);        msg_copy.obj = installParams;        mHandler.sendMessage(msg_copy);    }