我已经开发了一个应用程序,它以系统权限运行(它内置于AOSP的映像中),并具有INSTALL_PACKAGES权限。
我的目标是在后台静默安装APK,而无需用户交互。我读过关于stackoverflow的不同方法,但它们中的大多数要么过时了,要么根本不起作用。
例如,如果我试图使用PackageManager (无论是通过反射还是通过在我的应用程序中作为外壳命令运行),我会得到以下错误,这就是我当前遇到的问题。
11-20 19:06:10.999 4965 4965 D AndroidRuntime: >>>>>> START
com.android.internal.os.RuntimeInit uid 10039 <<<<<<
11-20 19:06:11.199 4965 4965 D AndroidRuntime: Calling main entry com.android.commands.pm.Pm
11-20 19:06:11.268 4965 4965 E Pm : Error
11-20 19:06:11.268 4965 4965 E Pm : java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.AppOpsManager.checkPackage(int, java.lang.String)' on a null object reference
11-20 19:06:11.268 4965 4965 E Pm : at android.os.Parcel.readException(Parcel.java:2010)
11-20 19:06:11.268 4965 4965 E Pm : at android.os.Parcel.readException(Parcel.java:1950)
11-20 19:06:11.268 4965 4965 E Pm : at android.content.pm.IPackageInstaller$Stub$Proxy.createSession(IPackageInstaller.java:254)
11-20 19:06:11.268 4965 4965 E Pm : at com.android.commands.pm.Pm.doCreateSession(Pm.java:607)
11-20 19:06:11.268 4965 4965 E Pm : at com.android.commands.pm.Pm.runInstall(Pm.java:431)
11-20 19:06:11.268 4965 4965 E Pm : at com.android.commands.pm.Pm.run(Pm.java:150)
11-20 19:06:11.268 4965 4965 E Pm : at com.android.commands.pm.Pm.main(Pm.java:107)
11-20 19:06:11.268 4965 4965 E Pm : at com.android.internal.os.RuntimeInit.nativeFinishInit(Native Method)
11-20 19:06:11.268 4965 4965 E Pm : at com.android.internal.os.RuntimeInit.main(RuntimeInit.java:285)
11-20 19:06:11.270 4965 4965 I app_process: System.exit called, status: 1
11-20 19:06:11.270 4965 4965 I AndroidRuntime: VM exiting with result code 1.
谁能告诉我为什么会发生这个错误,或者是其他解决方案,或者是用INSTALL_PACKAGES静默安装APKS的“现代”方式?
感谢您的帮助。
编辑:
对于将其标记为空指针异常的副本的人,您如何创建将是副本的连接?我特别询问它背后的原因,而不是关于空指针异常本身。你重复的建议完全没有意义。
EDIT 2:
我尝试安装APK的代码(从AOSP源代码的安装包应用程序复制):
public boolean install(Context context) {
Log.d(TAG, "Start Installation");
String packageName = "com.spotify.music";
String apkPath = Environment.getExternalStorageDirectory().toString() + "/APKs/spotify.apk";
PackageInstaller.Session session;
int sessionId;
PackageInstaller.SessionParams params = new PackageInstaller.SessionParams(PackageInstaller.SessionParams.MODE_FULL_INSTALL);
params.setAppPackageName(packageName);
try {
sessionId = context.getPackageManager().getPackageInstaller().createSession(params);
session = context.getPackageManager().getPackageInstaller().openSession(sessionId);
} catch (IOException e) {
Log.w(TAG, "Error creating/opening the installing session", e);
return false;
}
try {
File file = new File(apkPath);
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;
}
out.write(buffer, 0, numRead);
if (sizeBytes > 0) {
float fraction = ((float) numRead / (float) sizeBytes);
Log.d(TAG, "Install progress: " + fraction);
}
}
}
}
Log.d(TAG, "Install finished");
session.commit(PendingIntent.getBroadcast(context, sessionId, new Intent("android.intent.action.MAIN"), 0).getIntentSender());
return true;
} catch (IOException | SecurityException e) {
Log.e(TAG, "Could not write package", e);
session.close();
return false;
}
}
发布于 2018-06-05 04:24:55
我们使用以下代码:
Uri apkUri = Uri.fromFile(apkFile);
IPackageInstallObserver observer = null;
String installerPackageName = "MyInstaller";
getPackageManager().installPackage(apkUri, observer, PackageManager.INSTALL_REPLACE_EXISTING, installerPackageName);
它已被弃用,但即使在Android 8.1上也能正常工作。
https://stackoverflow.com/questions/50614646
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