Android RadioButton学习笔记

package com.ldci.lesson7_buttondemo;


import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.RadioButton;
import android.widget.TextView;


public class MainActivity extends Activity implements OnClickListener{


private RadioButton r1;
private RadioButton r2;
private TextView tv1;


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

tv1 = (TextView)findViewById(R.id.textView1);
r1 = (RadioButton)findViewById(R.id.r0);
r2 = (RadioButton)findViewById(R.id.r1);
r1.setOnClickListener(this);
r2.setOnClickListener(this);

}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}


@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.r0:
tv1.setText("ttttttttttttttttt");
break;
case R.id.r1:
tv1.setText("nnnnnnnnnnnnnnnnnnnnnnn");
break;
case R.id.r2:
tv1.setText("nnnnnnnnnnnnnnnnnnnnnnn");
break;


default:
break;
}

}


}