Hi,
I was going to update the 'hello world' message in a edit text box by
java.util.Timer.
But it did not work as in a simple Java application.
Maybe the way in Android is to put the timer in a service.
But I'll like to know the reason: why does java.util.Timer not make
sense in Activity?
Thank you in advance.
package com.example.android.helloactivity;
import java.util.Timer;
import java.util.TimerTask;
import android.app.Activity;
import android.os.Bundle;
import android.widget.EditText;
/**
* A minimal "Hello, World!" application.
*/
public class HelloActivity extends Activity {
private Timer helloTimer = new Timer();
int seq = 0;
public HelloActivity() {
}
@Override
protected void onResume() {
sayHelloWorld();
helloTimer.schedule(new TimerTask() {
@Override
public void run() {
System.out.println("timer run");
sayHelloWorld();
}
}, 3000, 1000);
super.onResume();
}
@Override
protected void onPause() {
helloTimer.cancel();
super.onPause();
}
private void sayHelloWorld() {
EditText helloEditText = (EditText)findViewById(R.id.text);
helloEditText.setText("Hello world " + (++seq));
helloEditText.invalidate();
}
/**
* Called with the activity is first created.
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Set the layout for this activity. You can find it
// in res/layout/hello_activity.xml
setContentView(R.layout.hello_activity);
}
}
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