I knew there was something that I missed. Thanks to all who shed
light on this thread. Here's the final code for those newbies who may
have the same problem.
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
// declare tv object by findViewByID
final TextView tv = (TextView) findViewById(R.id.TextView01);
// set TextView's text property to a new string upon launch of
app
tv.setText("This is sample.");
// declare button object by findViewByID
Button button = (Button) findViewById(R.id.Button01);
// Method if you click the button
button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// this is a pop up message then goes away
after a short period of
time
Toast.makeText(Hello.this, "Hello World",
Toast.LENGTH_SHORT).show();
// this changes the text in the TextView object
to the said string
tv.setText("Button Clicked");
}
});
}
}
On Sep 1, 2:26 am, Filip Havlicek <havlicek.fi...@gmail.com> wrote:
> You still need to specify the tv variable type (of course, think about
> it!!!).
>
> TextView tv = (TextView) findViewById(R.id.TextView01);
>
> Best regards,
> Filip Havlicek
>
> 2010/9/1 rb <rbs...@gmail.com>
>
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