android: How to call the number by android application [duplicate]

Answer 1

Try this,

Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:123456789"));
startActivity(callIntent);

And remember add this CALL_PHONE permission to your manifest.xml:

<uses-permission android:name="android.permission.CALL_PHONE" />

This may helps you.

Answer 2

Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:123456789"));
startActivity(callIntent);

Edit: Must add <uses-permission android:name="android.permission.CALL_PHONE" /> in Manifest as well.