Check if application is installed - Android

Question

I'm trying to install apps from the Google play. I can understand that on opening the google play store url, it opens the google play and when i press the back button, the activity resumes.

Intent marketIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(appURL));

marketIntent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);

startActivity(marketIntent);

When I went back to the activity, I tried calling this onResume() to check if the app is installed, but i receive an error:

@Override

protected void onResume() {

    super.onResume();

    boolean installed = false;

    while (!installed) {

        installed  =   appInstalledOrNot(APPPACKAGE);

        if (installed) {

             Toast.makeText(this, "App installed", Toast.LENGTH_SHORT).show();

        }

    }

}



private boolean appInstalledOrNot(String uri) {

  PackageManager pm = getPackageManager();

  boolean app_installed = false;

  try {

      pm.getPackageInfo(uri, PackageManager.GET_ACTIVITIES);

      app_installed = true;

  }

  catch (PackageManager.NameNotFoundException e) {

      app_installed = false;

  }

  return app_installed ;

}

The error is as follows:

E/AndroidRuntime(796): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.appinstaller/com.example.appinstaller.MainActivity}: android.content.ActivityNotFoundException:

No Activity found to handle Intent { act=android.intent.action.VIEW dat=market://details?id=com.package.name flg=0x40080000 }

I guess the activity is onPause(). Is there a better way to implement? I'm trying to check if the app has finished installing.

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Answer 1

Try this:

private boolean isPackageInstalled(String packagename, Context context) {
    PackageManager pm = context.getPackageManager();
    try {
        pm.getPackageInfo(packagename, PackageManager.GET_ACTIVITIES);
        return true;
    } catch (NameNotFoundException e) {
        return false;
    }
}

It attempts to fetch information about the package whose name you passed in. Failing that, if a NameNotFoundException was thrown, it means that no package with that name is installed, so we return false.

Note: we might want to pass in a PackageManager instead of a Context, so that the method is slightly more flexibly usable. You can now use the method without access to a Context instance, as long as you have a PackageManager instance.

private boolean isPackageInstalled(String packagename, PackageManager packageManager) {
    try {
        packageManager.getPackageInfo(packagename, PackageManager.GET_ACTIVITIES);
        return true;
    } catch (NameNotFoundException e) {
        return false;
    }
}

Use it like this:

public void someMethod() {
    // ...

    PackageManager pm = context.getPackageManager();
    boolean isInstalled = isPackageInstalled("com.somepackage.name", pm);

    // ...
}

Or maybe

public void someMethod(PackageManager pm) {
    // ...

    boolean isInstalled = isPackageInstalled("com.somepackage.name", pm);

    // ...
}

Check if application is installed - Android

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