Android 倒计时跳转页面之handler的详细运用

这是完整的一段代码 当然其中的按钮还需自己创建引用，希望能帮人帮己

public class MainActivity extends AppCompatActivity {

int count = 3;
 Button btn_skip;
 @Override
 protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

 getWindow().getDecorView().setSystemUiVisibility(View.GONE);//隐藏状态栏

 setContentView(R.layout.activity_main);

 btn_skip = (Button)findViewById(R.id.btn_skip);
 btn_skip.setText(count+"s");

 Message message = handler.obtainMessage(1);
 handler.sendMessageDelayed(message,1000);

 }

final Handler handler = new Handler(){
@Override
 public void handleMessage(Message msg) {
switch(msg.what){
case 1:
count--;
 btn_skip.setText(count+"s");

 if (count > 0){
                        Message message = handler.obtainMessage(1);
 handler.sendMessageDelayed(message,1000);
 }else{
                        Intent intent = new Intent(MainActivity.this,Main2Activity.class);
 startActivity(intent);
 }
            }

super.handleMessage(msg);
 }
    };