Android 跳轉應用市場評分

在Android的App中，經常會見到這樣的功能。從當前app跳轉到一個應用商店且顯示本軟件詳情的頁面，讓用戶給自己的App進行評分，從而提高App的排名。下面介紹該功能的實現。

/***
 * 跳轉應用市場評分
 * @author Lucasey
 */
public class ScoreUtils {
    /**
     * 獲取已安裝應用商店的包名列表
     * 
     * @param context
     * @return
     */
    public static ArrayList<String> InstalledAPPs(Context context) {
        ArrayList<String> pkgs = new ArrayList<String>();
        if (context == null)
            return pkgs;
        Intent intent = new Intent();
        intent.setAction("android.intent.action.MAIN");
        intent.addCategory("android.intent.category.APP_MARKET");
        PackageManager pm = context.getPackageManager();
        List<ResolveInfo> infos = pm.queryIntentActivities(intent, 0);
        if (infos == null || infos.size() == 0)
            return pkgs;
        int size = infos.size();
        for (int i = 0; i < size; i++) {
            String pkgName = "";
            try {
                ActivityInfo activityInfo = infos.get(i).activityInfo;
                pkgName = activityInfo.packageName;
            } catch (Exception e) {
                e.printStackTrace();
            }
            if (!TextUtils.isEmpty(pkgName))
                pkgs.add(pkgName);

        }
        return pkgs;
    }

    /**
     * 過濾出已經安裝的包名集合
     * @param context
     * @param pkgs
     *            待過濾包名集合
     * @return 已安裝的包名集合
     */
    public static ArrayList<String> SelectedInstalledAPPs(Context context,ArrayList<String> pkgs) {
        ArrayList<String> empty = new ArrayList<String>();
        if (context == null || pkgs == null || pkgs.size() == 0)
            return empty;
        PackageManager pm = context.getPackageManager();
        List<PackageInfo> installedPkgs = pm.getInstalledPackages(0);
        int li = installedPkgs.size();
        int lj = pkgs.size();
        for (int j = 0; j < lj; j++) {
            for (int i = 0; i < li; i++) {
                String installPkg = "";
                String checkPkg = pkgs.get(j);
                try {
                    installPkg = installedPkgs.get(i).applicationInfo.packageName;
                } catch (Exception e) {
                    e.printStackTrace();
                }
                if (TextUtils.isEmpty(installPkg))
                    continue;
                if (installPkg.equals(checkPkg)) {
                    empty.add(installPkg);
                    break;
                }

            }
        }
        return empty;
    }

    /**
     * 跳轉到app詳情界面
     * @param appPkg App的包名
     * @param marketPkg
     *  應用商店包名 ,如果爲""則由系統彈出應用商店列表供用戶選擇,否則調轉到目標市場的應用詳情界面，某些應用商店可能會失敗
     */
    public static void launchAppDetail(String appPkg, String marketPkg) {
        try {
            if (TextUtils.isEmpty(appPkg))
                return;
            Uri uri = Uri.parse("market://details?id=" + appPkg);
            Intent intent = new Intent(Intent.ACTION_VIEW, uri);
            if (!TextUtils.isEmpty(marketPkg))
                intent.setPackage(marketPkg);
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            MyUtils.getAppContext().startActivity(intent);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}