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import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;
public class MainActivity extends Activity {
TextView textView;
Handler handler;
Runnable runnable;
boolean stop = true;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = (TextView) findViewById(R.id.text);
handler = new Handler();
runnable = new Runnable() {
@Override
public void run() {
int a = (int) (Math.random() * 10);
textView.setText(a + "");
handler.postDelayed(runnable, 50);
}
};
}
public void start(View view) {
if (stop) {
handler.postDelayed(runnable, 0);
stop = !stop;
} else {
handler.removeCallbacks(runnable);
stop = !stop;
}
}
}
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