Thanks for the suggestions San and Fllip. I have tried the example that San gave but still errors. Here's the revised code in the main.xml file:
package com.HelloWorld; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; public class Hello extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // start code here tv = (TextView) findViewById(R.id.TextView01); tv.setText("This is sample."); Button button = (Button) findViewById(R.id.Button01); button.setOnClickListener(new OnClickListener() { public void onClick(View v) { // TODO Auto-generated method stub Toast.makeText(Hello.this, "Hello World", Toast.LENGTH_SHORT).show(); tv.setText("Button Clicked"); } }); } } Errors are: for the line: tv = (TextView) findViewById(R.id.TextView01); -------- tv can not be resolved to a variable for the line: tv.setText("This is sample."); -------- tv can not be resolved for the line: tv.setText("Button Clicked"); -------- tv can not be resolved Any ideas why the errors? On Aug 31, 4:56 pm, San <sanees...@gmail.com> wrote: > As Havlicek said, create thetextviewusing findViewByID and set the > text when button is clicked. > > Sample code: > > tv = (TextView) findViewById(R.id.TextView01); > tv.setText("This is sample."); > Button button = (Button) findViewById(R.id.Button01); > button.setOnClickListener(new OnClickListener() { > public void onClick(View v) { > tv.setText("Button Clicked"); > > } > }); -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en