java - 未安装应用程序的应用程序信息

Question

我正在尝试从未安装的应用程序中获取一些信息(名称和图标)。基本上 o 得到了 apk 文件，我还没有安装它，但我想在列表中显示它的名称和图标。

我正在尝试这样做:

public void getReceivedApps() {
    packageManager = getPackageManager();
    System.out.println("TRANSFER-RECORDActivityThe received filePath is : " + receivedFilePath);

    PackageInfo packageInfo = packageManager.getPackageArchiveInfo(receivedFilePath, PackageManager.GET_GIDS);
    System.out.println("TRANSFER RECORD ACTIVYT : O TO STRING TO PACKAGE INFO : " + packageInfo.toString());
    ApplicationInfo applicationInfo = packageInfo.applicationInfo;
    Log.d(this.getClass().getName(), "packaginf0 : " + applicationInfo.toString());
    String appName = applicationInfo.loadLabel(packageManager).toString();

    System.out.println("TRANSFER RECORD ACTIVITY  : THE APPNAME IS : " + appName);
    Drawable icon = packageManager.getPackageArchiveInfo(receivedFilePath, PackageManager.GET_GIDS).applicationInfo.loadIcon(packageManager);
    //then add it to a list.
}

问题是它在 loadIcon 和 loadLabel 指令中给我一个 nullpointerexception。

顺便说一句，receivedFilePath 字符串具有该 apk 文件的文件路径(即

Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/"+getIntent().getStringExtra("receivedFilePath"); ) 

并且这个作为字符串发送的 receivedFilePath 具有文件的名称(不是应用程序)

Answer 1

发现了一个类似的问题，希望对你有帮助:

String APKFilePath = "mnt/sdcard/myapkfile.apk"; //For example...

PackageManager pm = getPackageManager();
PackageInfo    pi = pm.getPackageArchiveInfo(APKFilePath, 0);

// the secret are these two lines....
pi.applicationInfo.sourceDir       = APKFilePath;
pi.applicationInfo.publicSourceDir = APKFilePath;
//

Drawable APKicon = pi.applicationInfo.loadIcon(pm);
String   AppName = (String)pi.applicationInfo.loadLabel(pm);

编号:Get apk file icon, version, name