未安裝的程序經過apk文件獲取icon

public class ApkTools {
	public static Drawable geTApkIcon(Context context, String Path) {
		// 未安裝的程序經過apk文件獲取icon
		String apkPath = Path; // apk 文件所在的路徑
		String PATH_PackageParser = "android.content.pm.PackageParser";
		String PATH_AssetManager = "android.content.res.AssetManager";
		try {
			Class<?> pkgParserCls = Class.forName(PATH_PackageParser);
			Class<?>[] typeArgs = { String.class };
			Constructor<?> pkgParserCt = pkgParserCls.getConstructor(typeArgs);
			Object[] valueArgs = { apkPath };
			Object pkgParser = pkgParserCt.newInstance(valueArgs);
			DisplayMetrics metrics = new DisplayMetrics();
			metrics.setToDefaults();
			typeArgs = new Class<?>[] { File.class, String.class,
			DisplayMetrics.class, int.class };
			Method pkgParser_parsePackageMtd = pkgParserCls.getDeclaredMethod(
			"parsePackage", typeArgs);
			valueArgs = new Object[] { new File(apkPath), apkPath, metrics, 0 };
			Object pkgParserPkg = pkgParser_parsePackageMtd.invoke(pkgParser,
			valueArgs);
			Field appInfoFld = pkgParserPkg.getClass().getDeclaredField(
			"applicationInfo");
			ApplicationInfo info = (ApplicationInfo) appInfoFld
			.get(pkgParserPkg);
			Class<?> assetMagCls = Class.forName(PATH_AssetManager);
			Object assetMag = assetMagCls.newInstance();
			typeArgs = new Class[1];
			typeArgs[0] = String.class;
			Method assetMag_addAssetPathMtd = assetMagCls.getDeclaredMethod(
			"addAssetPath", typeArgs);
			valueArgs = new Object[1];
			valueArgs[0] = apkPath;
			assetMag_addAssetPathMtd.invoke(assetMag, valueArgs);
			Resources res = context.getResources();
			typeArgs = new Class[3];
			typeArgs[0] = assetMag.getClass();
			typeArgs[1] = res.getDisplayMetrics().getClass();
			typeArgs[2] = res.getConfiguration().getClass();
			Constructor<Resources> resCt = Resources.class
			.getConstructor(typeArgs);
			valueArgs = new Object[3];
			valueArgs[0] = assetMag;
			valueArgs[1] = res.getDisplayMetrics();
			valueArgs[2] = res.getConfiguration();
			res = (Resources) resCt.newInstance(valueArgs);
			if (info != null) {
				if (info.icon != 0) {
					Drawable icon = res.getDrawable(info.icon);
					return icon;
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;

	}
}