Entry to android programming

Question

In the following program , when i try to run its getting error

textOut = (TextView) findViewById(R.id.tvGetInput);

in this line. Its showing error in tvGetInput. How can i fix it ?

package was.thebasics;
import android.app.Activity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class mymenu extends Activity {
 TextView textOut;
 EditText GetInput;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 // TODO Auto-generated method stub
 super.onCreate(savedInstanceState);
 setContentView(R.layout.main);
 textOut = (TextView) findViewById(R.id.tvGetInput);
 GetInput = (EditText) findViewById(R.id.etInput);
 Button ok = (Button) findViewById(R.id.bOK);
 ok.setOnClickListener(new View.OnClickListener() {
 public void onClick(View v) {
 // TODO Auto-generated method stub
 textOut.setText(GetInput.getText());
 }
 });
 // set up the button sound
 final MediaPlayer mpButtonClick = MediaPlayer.create(this, R.raw.button);
 Button bTutorial1 = (Button) findViewById(R.id.tutorial1);
 bTutorial1.setOnClickListener(new View.OnClickListener() {
 public void onClick(View v) {
 // TODO Auto-generated method stub
 startActivity(new Intent("was.thebasics.tutorialOne"));
 mpButtonClick.start();
 }
 });
 }
 }

Answer 1

Please check in main.xml file Textview id is given like that that.

android:id="@+id/tvGetInput"

• Waseem: thank you brother.. i fixed.. if possible plz give some suggestion to understand easily the android basic concepts.. I know the different blocks used .. but i dont know why they are used..

Answer 2

check that the id is created in R.java file,under gen folder

• Waseem: thank you brother.. i fixed.. if possible plz give some suggestion to understand easily the android basic concepts.. I know the different blocks used .. but i dont know why they are used..