Handler倒計時跳轉1v

Activity

private int time=5;

private Handler hand=new Handler(){
    @Override
    public void handleMessage(Message msg) {
        if(msg.what==0){
            if(time>0){
                time--;
                hand.sendEmptyMessageDelayed(0,1000);
            }else{
                Intent inte=new Intent(MainActivity.this,Main2Activity.class);
                startActivity(inte);
                finish();
            }
        }
    }
};

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

    //去除title
    ActionBar actionBar = getSupportActionBar();
    //ActionBar actionBar = getActionBar();
    actionBar.hide();
    //去掉Activity上面的狀態欄
    getWindow().setFlags(WindowManager.LayoutParams. FLAG_FULLSCREEN , WindowManager.LayoutParams. FLAG_FULLSCREEN);

    hand.sendEmptyMessageDelayed(0,0);
}

public void btn(View v){
    hand.removeCallbacksAndMessages(null);
    Intent inte=new Intent(MainActivity.this,Main2Activity.class);
    startActivity(inte);
    finish();
}