见下例：
File path = mContext.getCacheDir();
path.getAbsolutePath(); // /data/data/packagename/cache
List<PackageInfo> packs = mContext.getPackageManager().getInstalledPackages(0);
for (PackageInfo pkInfo : packs) { //只举一例，如下：
pkInfo.packageName; // com.google.android.location
pkInfo.applicationInfo.publicSourceDir; // /system/app/NetworkLocation.apk
pkInfo.applicationInfo.dataDir; // /data/data/com.google.android.location
pkInfo.applicationInfo.sourceDir; // /system/app/NetworkLocation.apk
}
<完>