handler

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public Handler mHandler = new Handler() {    public void handleMessage(Message msg) {        switch (msg.what) {            case 1:               //ui主界面做处理                break;            default:                break;        }        super.handleMessage(msg);    }};

 public void test(View v) {          Thread thread = new Thread(new Runnable() {            @Override            public void run() {                //自己代码。耗时操作。通知ui主线程                Message message = new Message();                message.what = 1;                mHandler.sendMessage(message);            }        });        thread.start();    }

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