android之TextVIew与Button交互

public class EX03_13Activity extends Activity {
Button myButton;
TextView myTextView;
int num = 0;
int[] Textcolor = {Color.BLUE,Color.GREEN,Color.CYAN};
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

myTextView = (TextView)findViewById(R.id.textview1);
myButton = (Button)findViewById(R.id.button1);
myButton.setOnClickListener(new Button.OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub

if(num < Textcolor.length){
myTextView.setTextColor(Textcolor[num]);
num++;
}else{
num = 0;
}

}});
}
}