TimerTask 更新UI线程

有两种方式：

第一种：post给Handler

// 开启线程刷新
handler = new Handler();
 
timer = new Timer();
timer.schedule(new TimerTask() {
    @Override
    public void run() {
        handler.post(new Runnable() {
            @Override
            public void run() {
                mTextLat.setText(AppContext.getLatitude()+"");
                mTextLng.setText(AppContext.getLongitude()+"");
            }
        });
    }
},0,1*1000);

第二种：给Handler发信息

// 开启线程刷新
        handler = new Handler(){
            @Override
            public void handleMessage(Message msg) {
                switch (msg.what) {
                    case 1:
                        mTextLat.setText(AppContext.getLatitude()+"");
                        mTextLng.setText(AppContext.getLongitude()+"");
                }
                super.handleMessage(msg);
            }
        };
 
        timer = new Timer();
        timer.schedule(new TimerTask() {
            @Override
            public void run() {
                Message msg = new Message();
                msg.what = 1;
                handler.sendMessage(msg);
            }
        },0,1*1000);

参考链接：https://blog.csdn.net/zsg2063/article/details/40661397