android中handler 轮询数据变化使用WeakReference防止内存泄露

自己项目有个传感器传数据，需要一直监听，刷新页面操作，一直刷新页面才出现内存泄露

泄露的原因
Java 的强引用、弱引用、软引用、虚引用

考进项目里面直接用
方法

    private Runnable timerRun = new Runnable() {        @Override        public void run() {            mOperationHandler.sendEmptyMessage(1);        }    };

 private OperationHandler mOperationHandler = new OperationHandler(new WeakReference            <>(this));

  /**     * 执行定时任务固定数量线程池     */    private ScheduledExecutorService timerThreads = Executors.newScheduledThreadPool(1);

 timerThreads.scheduleAtFixedRate(timerRun, 1500, 100, TimeUnit.MILLISECONDS);

 private static class OperationHandler extends Handler {        WeakReference mWeakReference;        OperationHandler(WeakReference weakReference) {            this.mWeakReference = weakReference;        }        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            OperationActivity activity = mWeakReference.get();            if (activity != null) {                if (msg.what == 1) {                    activity._handleWeightChanged();                    自己做页面的操作                }            }        }    }

   @Override    protected void onDestroy() {        super.onDestroy();        timerThreads.shutdownNow();        mOperationHandler.removeCallbacksAndMessages(null);    }

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