Android解析SD卡上的APK文件

public void parseApk(Context context, String apkFilePath){
    PackageManager packageManager = context.getPackageManager();
    PackageInfo packageInfo = packageManager.getPackageArchiveInfo(apkFilePath, 0);
    if(packageInfo != null){
        packageInfo.applicationInfo.sourceDir = apkFilePath;
        packageInfo.applicationInfo.publicSourceDir = apkFilePath;
        String name = packageInfo.applicationInfo.loadLabel(packageManager).toString();
        String packageName = packageInfo.packageName;
        String versionName = packageInfo.versionName;
        int versionCode = packageInfo.versionCode;
        Drawable iconDrawable = packageInfo.applicationInfo.loadIcon(packageManager);
    }
}

需要注意的是在得到packageInfo后必须要设置applicationInfo的sourceDir和publicSourceDir，否则你在读取label的时候会输出如下错误信息并抛出异常
Failure retrieving text 0x7f050000 in package com.taskkiller.demo

你读icon的时候会输出如下错误信息并抛出异常
Failure retrieving icon 0x7f020005 in package com.sample.radio

这是因为label和icon都是在资源里面的，不设置sourceDir和publicSourceDir就不能读取资源里面的信息