安卓下 按钮监听重复开启线程

public void onClick(View arg0) {if(isRun)handler.removeCallbacks(thread);else{thread = new Thread(new Runnable() {@Overridepublic void run() {String json = UrlHtmlUtil.getHtmlJsonByUrl(uri);Message m = handler.obtainMessage();Bundle bundle = new Bundle();bundle.putString("jsondata", json);m.setData(bundle);m.what = 0x11;handler.sendMessage(m);}});cityName = et.getText().toString();thread.start();//bt.setEnabled(false);}

<span style="font-size:24px;">定义一个Boolean变量isRun来判断线程是否已经开启。如开启则抛出线程。</span>