问题描述
1.但是一直得不到数据……
代码大致如下：这个是接受数据线程
private class ConnectedThread extends Thread {private final BluetoothSocket socket;private final InputStream inputStream;private final OutputStream outputStream;public ConnectedThread(BluetoothSocket socket) { this.socket = socket; InputStream input = null; OutputStream output = null; try {input = socket.getInputStream();output = socket.getOutputStream(); } catch (IOException e) {e.printStackTrace(); } this.inputStream = input; this.outputStream = output;}public void run() { byte[] buff = new byte[20]; int bytes; while (true) {try { bytes = inputStream.read(buff); String str = new String(buff, 'ISO-8859-1'); str = str.substring(0, bytes); Log.e('recv', str); System.out.println('**log:'+str); Message message=handler_accept.obtainMessage(); message.obj=str; handler_accept.sendMessage(message);} catch (IOException e) { e.printStackTrace(); break;} }}public void write(byte[] bytes) { try {outputStream.write(bytes); } catch (IOException e) {e.printStackTrace(); }}public void cancel() { try {socket.close(); } catch (IOException e) {e.printStackTrace(); }} }
---这个是handler
Handler handler_accept=new Handler(){@Overridepublic void handleMessage(Message msg) { String s= (String) msg.obj; timeStr=timeStr+s;//数据 } } } };
popupwindows，这个显示调用方法是在按钮的点击事件中
private void showPopupWindow(View view) {try { Thread.sleep(2000);} catch (InterruptedException e) { e.printStackTrace();}// 一个自定义的布局，作为显示的内容View contentView = LayoutInflater.from(Zhuye_Activity.this).inflate(R.layout.layout_timeupdate, null);// 设置按钮的点击事件final PopupWindow popupWindow = new PopupWindow(contentView,LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT, true);WindowManager manager=(WindowManager) getSystemService(Context.WINDOW_SERVICE);popupWindow.setTouchable(true);int xpos=manager.getDefaultDisplay().getWidth()/2-popupWindow.getWidth()/2;//xoff,yoff基于anchor的左下角进行偏移。TextView textView1 = (TextView) contentView.findViewById(R.id.textView_xiugai);TextView textView2 = (TextView) contentView.findViewById(R.id.textView_quxiao);final TextView textView_shebeitime= (TextView) contentView.findViewById(R.id.textView_shebeitime);textView_shebeitime.setText(textView1_neiyong.getText().toString());TextView textView_nowtime= (TextView) contentView.findViewById(R.id.textView_nowtime);SimpleDateFormat sDateFormat=new SimpleDateFormat('yyyy-MM-dd HH:mm:ss');String date=sDateFormat.format(new java.util.Date());textView_nowtime.setText(date);textView2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { popupWindow.dismiss(); }});textView1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { screenshot();String s=Utils.Timeform();try { outStream.write(s.getBytes()); outStream.write('rn'.getBytes());} catch (IOException e) { e.printStackTrace();} }});popupWindow.setTouchInterceptor(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) {return false;// 这里如果返回true的话，touch事件将被拦截// 拦截后 PopupWindow的onTouchEvent不被调用，这样点击外部区域无法dismiss }});*斜体文字*
那么问题来了。我一点击显示popupwindows，数据一直是null，有什么办法能让pop得到数据呢，本来我加个了sleep，结果不行、对这些还是不了解，sleep时，是不是接受线程停止了，有什么办法能显示数据？求助
问题解答
回答1：有的看不懂逻辑，outStream是怎么来的，假如你想把线程中的数据实时显示到popupWindow上，用handle抛出数据是正确的，但是为什么popupWindow的显示会跟流有关，不是只需要在popupWindow上重新设置值就可以了吗？（类似把handle里面的数据直接给popupWindow的textView.setText()）
回答2：主线程更新ui ,获取数据,通过回调由主线程更新ui
