Class to open an installed application or launch the Play Store to download it.

OpenAppUtils.java

import com.tempos21.android.commons.utils.T21Log;

import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.net.Uri;

public class OpenAppUtils {

    /**
     * Open an application
     *
     * @param context       Context
     * @param applicationId Application Id we want open
     */
    public static void openApplication(Context context, String applicationId) {
        Intent launchIntent = context.getPackageManager()
                .getLaunchIntentForPackage(applicationId);
        context.startActivity(launchIntent);
    }

    /**
     * Check if an application is installed
     *
     * @param context       Context
     * @param applicationId Application Id we want check
     */
    public static boolean isApplicationInstalled(Context context, String applicationId) {
        PackageManager packageManager = context.getPackageManager();
        ApplicationInfo applicationInfo = null;
        try {
            applicationInfo = packageManager.getApplicationInfo(applicationId, 0);
        } catch (PackageManager.NameNotFoundException e) {
            T21Log.e(OpenAppUtils.class.getSimpleName(), e);
        }
        return applicationInfo != null;
    }

    /**
     * Open Google Play application or the web site
     *
     * @param context       Context
     * @param applicationId Application Id we want open
     */
    public static void openGooglePlay(Context context, String applicationId) {
        try {
            context.startActivity(
                    new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + applicationId)));
        } catch (android.content.ActivityNotFoundException anfe) {
            context.startActivity(
                    new Intent(Intent.ACTION_VIEW, Uri.parse("http://play.google.com/store/apps/details?id=" + applicationId)));
        } catch (Exception e) {
            T21Log.e(OpenAppUtils.class.getSimpleName(), e);
        }
    }
}