Android系统静默安装APK

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因为要在一款Android系统的产品上实现APK的自动升级功能，所以搜索了网上关于这方面的资料：http://blog.csdn.net/liufuliang163/article/details/73770589

在上述资料的基础上，结合我们的目标系统Android4.4.2，研究了一下相关代码

通过两种方式实现的需求，修改默认界面方式和不带界面方式

修改默认界面方式：

PackageInstallerActivity.java

因为是activity，首先看 onCreate 方法，

第一步先获得 intent 携带的信息，

// get intent information
final Intent intent = getIntent();
mPackageURI = intent.getData();
mOriginatingURI = intent.getParcelableExtra(Intent.EXTRA_ORIGINATING_URI);
mReferrerURI = intent.getParcelableExtra(Intent.EXTRA_REFERRER);
mPm = getPackageManager();

第二步，安装过程解析 mInstallFlowAnalytics = new InstallFlowAnalytics();

注意这步 boolean requestFromUnknownSource = isInstallRequestFromUnknownSource(intent); 为了能够安装未知来源的APP，此方法做了修改

第三步，intent 携带的参数检查

第四步，设置显示界面

//set view
setContentView(R.layout.install_start);
mInstallConfirm = findViewById(R.id.install_confirm_panel);
mInstallConfirm.setVisibility(View.INVISIBLE);
PackageUtil.initSnippetForNewApp(this, as, R.id.app_snippet);

第五步，初始化安装信息 initiateInstall();

我们改造的目标是吧由用户选择的地方都由程序自动完成，主要修改下面提到的几个方法，具体请参考代码资源

startInstallConfirm -> appInstall

InstallAppProgress->mHandler->handleMessage

不带界面方式：

主要添加了两个类 PackageInstallerHideActivity UninstallerHideActivity

PackageInstallerHideActivity 静默安装

// lfl 20170623 add class PackageInstallObserver extends IPackageInstallObserver.Stub {        public void packageInstalled(String packageName, int returnCode) {//            Message msg = mHandler.obtainMessage(INSTALL_COMPLETE);//            msg.arg1 = returnCode;//            mHandler.sendMessage(msg);Intent result = new Intent();result.putExtra(Intent.EXTRA_INSTALL_RESULT, returnCode);setResult(returnCode == PackageManager.INSTALL_SUCCEEDED ? Activity.RESULT_OK: Activity.RESULT_FIRST_USER, result);finish();         }    }//lfl 20170623 add startprivate void installAPK(){int installFlags = 0;String packageName = mPkgInfo.packageName;PackageManager pm = getPackageManager();try{    PackageInfo pi = pm.getPackageInfo(packageName,PackageManager.GET_UNINSTALLED_PACKAGES);    if(pi != null)    {installFlags |= PackageManager.INSTALL_REPLACE_EXISTING;    }}catch (NameNotFoundException e){}String installerPackageName = getIntent().getStringExtra(Intent.EXTRA_INSTALLER_PACKAGE_NAME);PackageInstallObserver observer = new PackageInstallObserver();pm.installPackage(mPackageURI, observer, installFlags,installerPackageName);}//lfl 20170623 add end

UninstallerHideActivity 静默卸载APP

在oncrete 方法中添加

//lfl add 20170626        if(mAppInfo == null || errFlag) {            Log.e(TAG, "Invalid packageName or componentName in " + packageURI.toString());            setResult(Activity.RESULT_FIRST_USER);            finish();        } else {            PackageDeleteObserver observer = new PackageDeleteObserver();            getPackageManager().deletePackage(mAppInfo.packageName, observer, 0);        }//lfl add 20170626

添加内部类

//lfl add 20170626class PackageDeleteObserver extends IPackageDeleteObserver.Stub {public void packageDeleted(String packageName, int returnCode) {Intent result = new Intent();result.putExtra(Intent.EXTRA_INSTALL_RESULT, returnCode);setResult(returnCode == PackageManager.DELETE_SUCCEEDED ? Activity.RESULT_OK: Activity.RESULT_FIRST_USER, result);finish();}}

相关代码：http://download.csdn.net/detail/liufuliang163/9881675

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