从sdcard文件中获取apk信息

Question

        String apkPath = apk.getAbsolutePath();
        Log.i(getClass().getName(), "addApk(): apkPath = " + apkPath);
        PackageInfo localPackageInfo = pm.getPackageArchiveInfo(apkPath, 0);
        localPackageInfo.applicationInfo.sourceDir = apkPath;//! null point exception

无法得到apk的图标，名字，版本等。我也尝试了魔术数字8192而不是0，但也不起作用。有人有什么建议吗？提前行动！

我把我的代码改为：

        PackageInfo pi = pm.getPackageArchiveInfo(apkPath, PackageManager.GET_ACTIVITIES);
        if (pi != null) {
            ApplicationInfo ai = pi.applicationInfo;
            Drawable appIcon = pm.getApplicationIcon(ai);
            String appName = pm.getApplicationLabel(ai).toString();
            String appVersion = pi.versionName;
            String pkgName = ai.packageName;

            Log.i(getClass().getName(), "pkgName = " + pkgName + ", appName = " + appName + ", appVersion = " + appVersion);
            adapter.add(new InstallItem(pkgName, appIcon, appName, appVersion));
        }

得到了这样的输出：

pkgName = com.chaozh.iReaderFree，appName = com.chaozh.iReaderFree，appVersion = 1.3.2.0 .

正如您在这里看到的，我无法获得应用程序名称，它的图标总是默认相同的图标。我厌倦了市场上的其他安装程序，它们工作得很好，所以有人告诉我怎么做？谢谢。

Answer 1

这是正确的答案，有一些窍门(SDK>8!)：

public Drawable getApkIcon(String path){      
    PackageManager pm = getPackageManager();      
    PackageInfo info = pm.getPackageArchiveInfo(path, PackageManager.GET_ACTIVITIES);      
    if(info != null){      
        ApplicationInfo appInfo = info.applicationInfo;

        if(Build.VERSION.SDK_INT >= 8){
            appInfo.sourceDir = path;
            appInfo.publicSourceDir = path;
        }

        return appInfo.loadIcon(pm);
    }           
    return null;
}

Answer 2

最简单的方法只是使用它的packageName获取任何应用程序的图标

public static final Drawable getIconOfAppUsingPackageName(Context context,String packageName)
{
 Drawable icon = context.getPackageManager().getApplicationIcon(packageName);
 imageView.setImageDrawable(icon);
 return icon;
}