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);
        }
    };