AOSP - 在后台安装软件包而无需用户确认

Question

我正在为 Android 8.1 版构建 AOSP，我想实现自己的应用商店，因此需要在系统上安装 apk。

到目前为止，我看到的唯一方法是使用类似以下的方法：

val intent = Intent(Intent.ACTION_VIEW)
val file = File(Environment.getExternalStorageDirectory().toString() + "/APKs/" + "spotify.apk")
intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive")
intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK
startActivity(intent)

但是，这需要用户在安装每个软件包之前进行确认。如果应用程序是内置在图像中的系统应用程序，是否还有其他方法可以在没有用户确认的情况下实现此目的？另外，安装在后台有效地做什么？只是将 APK 文件移动到 /data/app 还是会发生什么？

Answer 1

看看runInstall()方法

https://android.googlesource.com/platform/frameworks/base/+/master/cmds/pm/src/com/android/commands/pm/Pm.java

所需权限：

<uses-permission android:name="android.permission.INSTALL_PACKAGES"/>
<uses-permission android:name="android.permission.INTERACT_ACROSS_USERS"/>
<uses-permission android:name="android.permission.INTERACT_ACROSS_USERS_FULL"/>

Answer 2

我是这样解决的：

先决条件：

如前所述，您的 APK 需要由系统签名。实现这一目标的一种方法是自己构建 AOSP 映像并将源代码添加到构建中。

代码：

作为系统应用安装后，您可以使用包管理器方法安装和卸载 APK，如下所示：

安装：

public boolean install(final String apkPath, final Context context) {
    Log.d(TAG, "Installing apk at " + apkPath);
    try {
        final Uri apkUri = Uri.fromFile(new File(apkPath));
        final String installerPackageName = "MyInstaller";
        context.getPackageManager().installPackage(apkUri, installObserver, PackageManager.INSTALL_REPLACE_EXISTING, installerPackageName);
        return true;
    } catch (Exception e) {
        e.printStackTrace();
        return false;
    }
}

卸载：

public boolean uninstall(final String packageName, final Context context) {
    Log.d(TAG, "Uninstalling package " + packageName);
    try {
        context.getPackageManager().deletePackage(packageName, deleteObserver, PackageManager.DELETE_ALL_USERS);
        return true;
    } catch (Exception e) {
        e.printStackTrace();
        return false;
    }
}

要在您的 APK 安装/卸载后进行回调，您可以使用这个：

/**
 * Callback after a package was installed be it success or failure.
 */
private class InstallObserver implements IPackageInstallObserver {

    @Override
    public void packageInstalled(String packageName, int returnCode) throws RemoteException {

        if (packageName != null) {
            Log.d(TAG, "Successfully installed package " + packageName);
            callback.onAppInstalled(true, packageName);
        } else {
            Log.e(TAG, "Failed to install package.");
            callback.onAppInstalled(false, null);
        }
    }

    @Override
    public IBinder asBinder() {
        return null;
    }
}

/**
 * Callback after a package was deleted be it success or failure.
 */
private class DeleteObserver implements IPackageDeleteObserver {

    @Override
    public void packageDeleted(String packageName, int returnCode) throws RemoteException {
        if (packageName != null) {
            Log.d(TAG, "Successfully uninstalled package " + packageName);
            callback.onAppUninstalled(true, packageName);
        } else {
            Log.e(TAG, "Failed to uninstall package.");
            callback.onAppUninstalled(false, null);
        }
    }

    @Override
    public IBinder asBinder() {
        return null;
    }
}

/**
 * Callback to give the flow back to the calling class.
 */
public interface InstallerCallback {
    void onAppInstalled(final boolean success, final String packageName);
    void onAppUninstalled(final boolean success, final String packageName);
}