phone call in android

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Mobile

Android

The following code is used to call a number through android app.But in real it is not calling a number.is there any problem in it.can any one run it and give me the real changes that i have to do to run it properly in real android device.what are the settings that I have to do to run the app in mobile device or through bluestacks in pc.

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class Phonecall extends Activity {
    /** Called when the activity is first created. */
	 EditText edittext1;  
	 Button button1;  
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        edittext1=(EditText)findViewById(R.id.editText1);  
        button1=(Button)findViewById(R.id.button1);  
        
        button1.setOnClickListener(new OnClickListener(){  
        	  
            @Override  
            public void onClick(View arg0) {  
                String number=edittext1.getText().toString();  
                Intent callIntent = new Intent(Intent.ACTION_CALL);  
                callIntent.setData(Uri.parse("tel:9550053947"+number));  
                startActivity(callIntent);  
            }  
              
        });  
    }
}