直截了当 - 由于一些神秘的原因我的应用程序在接收InputStream时丢失了部分数据(String)。我在这里谈论蓝牙连接。大多数时候,我收到正确的字符串,但一旦进入缩短状态。这里最奇怪的是我将每个InputStream打印到我的ScrollView中,我可以告诉整个字符串都在那里......不过这里是代码:
@Override
public void run() {
InputStream inputStream;
try {
inputStream = mBTSocket.getInputStream();
while (!bStop) {
byte[] buffer = new byte[256];
int bytes;
if (inputStream.available() > 0) {
bytes = inputStream.read(buffer);
final String strInput = new String(buffer, 0, bytes);;
mTxtReceive.post(new Runnable() {
@Override
public void run() {
mTxtReceive.append(strInput);
int txtLength = mTxtReceive.getEditableText().length();
if (txtLength > mMaxChars) {
mTxtReceive.getEditableText().delete(0, txtLength - mMaxChars);
}
scrollView.post(new Runnable() {
@Override
public void run() {
scrollView.fullScroll(View.FOCUS_DOWN);
}
});
}
});
runOnUiThread(new Runnable() {
@Override
public void run() {
weather = strInput.split(",");
mTxtHumidity.setText(weather[0]);
mTxtTemperatureDHT.setText(weather[1]);
mTxtPressure.setText(weather[2]);
mTxtLux.setText(weather[3]);
mTxtRainMM.setText(weather[4]);
mTxtRainDaily.setText(weather[5]);
mTxtWSKPH.setText(weather[6]);
mTxtWGKPH.setText(weather[7]);
mTxtWSAVG2.setText(weather[8]);
mTxtWGAVG10.setText(weather[9]);
}
});
}
Thread.sleep(500);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
这里的问题是数组weather
上的空异常,因为根据我的应用程序,我有时会访问超出边界的项目(weather
长度大多数时间是6/7/8一旦出错)。应用程序在10%的时间内崩溃。
背后的原因是什么?
编辑:有时接收InputStream而不是接收56个字节,我得到33和22个
答案 0 :(得分:0)
答案可以在这里找到:Android InputStream dropping first two bytes (modified BluetoothChat)
添加
try {
Thread.sleep(100);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
仅解决由于sleep
方法导致Android和Arduino之间的非动态数据交换。事实证明,即使sleep(50)
也适用于这种情况。由于某种原因,这个短sleep
缓冲区永远不会被分割也不会丢失。如果编码不好,请在downvoting之前解释。