代码之家 › 专栏 › 技术社区 › rayman

使用管理员权限安装时出错

android

rayman · 技术社区 · 15 年前

我在一家手机公司工作,我们的手机基于Android(SDK 1.5),我们可以在手机中签署应用程序并授予其固件权限,例如:

在使用PackageManager时安装外部应用程序。(SDK 1.5)

我就是这么做的:

 File src = context.getFileStreamPath(fileName);
 Uri mPackageURI = Uri.parse(src.getAbsolutePath());    
PackageManager pm = context.getPackageManager();

int installFlags = 0;

try {
  PackageInfo pi = pm.getPackageInfo(packageName,
    PackageManager.GET_UNINSTALLED_PACKAGES);

  if (pi != null) {
    Log.debug(TAG, TAG + ":replacing  " + fileName);

    installFlags |= PackageManager.REPLACE_EXISTING_PACKAGE;
  }

} catch (NameNotFoundException e) { }

try {
    PackageInstallObserver observer = new PackageInstallObserver();
    pm.installPackage(mPackageURI, observer, installFlags);

} catch (SecurityException e) {
  //if the app is not signed by the manufacture it will get here a security exception
}


class PackageInstallObserver extends IPackageInstallObserver.Stub {
  public void packageInstalled(String packageName, int returnCode) {
  }
}

因为我们是人,所以在执行的时候不会有任何异常安装包(mPackageURI,observer,installFlags);

因为我们已经用管理员权限签署了我们的应用程序。

但我们得到的是这个疯狂的结果和手机重新启动。

threadid=21: thread exiting with uncaught exception (group=0x4000fe70)

07-11 16:29:38.493: ERROR/AndroidRuntime(2561): Uncaught handler: thread PackageManager exiting due to uncaught exception

07-11 16:29:38.493: ERROR/AndroidRuntime(2561): *** EXCEPTION IN SYSTEM PROCESS.  System will crash.

07-11 16:29:38.493: ERROR/AndroidRuntime(2561): java.lang.NullPointerException

07-11 16:29:38.493: ERROR/AndroidRuntime(2561):     at 
com.android.server.PackageManagerService.installPackageLI(PackageManagerService.java:3634)

07-11 16:29:38.493: ERROR/AndroidRuntime(2561):     at com.android.server.PackageManagerService.access$1500(PackageManagerService.java:120)

07-11 16:29:38.493: ERROR/AndroidRuntime(2561):     at com.android.server.PackageManagerService$5.run(PackageManagerService.java:3253)

07-11 16:29:38.493: ERROR/AndroidRuntime(2561):     at android.os.Handler.handleCallback(Handler.java:587)

07-11 16:29:38.493: ERROR/AndroidRuntime(2561):     at android.os.Handler.dispatchMessage(Handler.java:92)

07-11 16:29:38.493: ERROR/AndroidRuntime(2561):     at android.os.Looper.loop(Looper.java:123)

07-11 16:29:38.493: ERROR/AndroidRuntime(2561):     at android.os.HandlerThread.run(HandlerThread.java:60)

第二种方式: 我也试过这种方法,但得到了不同的例外:

*与第一种方式非常相似,只是主要区别在于:

 String src = String.format("file:///data/data/com.mirs.agentcore/files/%s", fileName);

 Uri mPackageURI = Uri.parse(src);

 PackageManager pm = context.getPackageManager();



 String src = String.format("file:///data/data/com.mirs.agentcore/files/%s", fileName);

 Uri mPackageURI = Uri.parse(src);

 PackageManager pm = context.getPackageManager();

 int installFlags = 0;

  .... //the rest of the code is the same as the First way(mention above)

执行此代码(第二种方式)后,手机会正常继续,但我发现以下异常:

09-12 12:10:16.484:错误/PackageManager(6601):无法将包文件复制到临时文件。

1 回复 | 直到 15 年前

Rob 15 年前

 try {
    fd = mContext.getContentResolver().openFileDescriptor(pPackageURI, "r");
 } 
 catch (FileNotFoundException e) {
    Log.e(TAG, "Couldn't open file descriptor from download service.");
    res.returnCode = PackageManager.INSTALL_FAILED_INSUFFICIENT_STORAGE;

    // This break statement was line 3634.
    break main_flow;
 }

这个 documentation for ContentResolver.openFileDescriptor 说:

如果没有,则抛出FileNotFoundException 无效。

fileName 和 Uri.parse(src.getAbsolutePath()) .