public class MainActivity extends Activity {
private TextView textview;
private Button but1;
private int count=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textview=(TextView)findViewById(R.id.mytextview);
but1=(Button)findViewById(R.id.but1);
But1 b=new But1();
but1.setOnClickListener(b);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
class But1 implements OnClickListener{
@Override
public void onClick(View v) {
new CountDownTimer(30000,1000) {
@Override
public void onTick(long millisUntilFinished) {
textview.setText("请等待30秒(" + millisUntilFinished / 1000 + ")...");
}
@Override
public void onFinish() {
Toast.makeText(getApplicationContext(), "倒计时结束",
Toast.LENGTH_SHORT).show();
}
}.start();
}
}
}
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