解决handler在api30使用过程中内存泄露的问题

使用Handler（Looper，Handler.Callback）构造函数并显式指定循环器。

情景一：如果您希望代码在main/UI thread上运行

Handler handler = new Handler(Looper.getMainLooper(), new Handler.Callback() {

    @Override    public boolean handleMessage(@NonNullMessage message) {

        // Your code

          return true;

    }

});

情景二：如果你想让代码在后台运行thread

// Create a background thread that has a Looper

HandlerThread handlerThread = new HandlerThread("HandlerThread");

handlerThread.start();

// Using this handler to post tasks that running on a background thread.

Handler handler = new Handler(handlerThread.getLooper(), new Handler.Callback() {

    @Override    public boolean handleMessage(@NonNullMessage message) {

        // Your code

            return true;

    }

});

释放thread：handlerThread.quit();或者 handlerThread.quitSafely();

情景三：如果希望代码在后台thread上运行，并将结果返回main/UI thread

// Using this handler to post tasks that run on main/UI thread

Handler uiHandler = new Handler(Looper.getMainLooper());

// Create a background thread that has a LooperHandler

Thread handlerThread = new HandlerThread("HandlerThread");

handlerThread.start();

// Using this handler to post task that run on a background 

threadHandler handler = new Handler(handlerThread.getLooper(), new Handler.Callback() {

    @Override    

    public boolean handleMessage(@NonNullMessage message) {

        // Execute the code or pass the result back to main/UI thread        

            uiHandler.post(new Runnable() {

            @Override           

             public void run() {

            }

        });

        return true;

    }

});