How to know if a particular application is installed or not on the device?

Question

I want to check whether an app is installed on the device or not. I am using code below :

PackageManager pm = context.getPackageManager();
        List

        

Answer 1

like whatsapp

shareImage("com.whatsapp", "Whatsapp");

call

public void shareImage(String pkgname, String appname) {
  String path = null;
  try {
    path = MediaStore.Images.Media.insertImage(getContentResolver(),
    arrImagePath.get(slidePager.getCurrentItem()), "Title", null);
  } catch (FileNotFoundException e1) {
    e1.printStackTrace();
  }
  Uri uri = Uri.parse(path);
  Intent share = new Intent(Intent.ACTION_SEND);
  share.setPackage(pkgname);
  share.putExtra(Intent.EXTRA_STREAM, uri);
  share.setType("image/*");
  share.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
  startActivity(Intent.createChooser(share, "Share image File");
}