我试图通过蓝牙从Android应用程序发送加速器值到PC。我正在研究BluetoothChat演示应用程序。在Android应用程序中,我有一个名为onSensorChanged的方法,每次加速度更改时都会调用它。该方法看起来像下面:如何从java中的inputStream中读取每个字符串
@Override
public void onSensorChanged(SensorEvent e) {
// the work done when the accelerometer data changes
try {
Thread.sleep(25);
} catch (InterruptedException e1) {
e1.printStackTrace();
}
sensorX = e.values[0];
sensorY = e.values[1];
Toast.makeText(BluetoothChat.this, "x coordinate = " + sensorX + "y coordinate = " + sensorY Toast.LENGTH_SHORT).show();
BigDecimal sensorXDec = new BigDecimal(e.values[0]).setScale(2,BigDecimal.ROUND_HALF_UP);
BigDecimal sensorYDec = new BigDecimal(e.values[1]).setScale(2,BigDecimal.ROUND_HALF_UP);
String vals = String.valueOf(sensorXDec.toPlainString() + "," + sensorYDec.toPlainString());
mChatService.writeFromString(vals);
}
方法writeFromString
public void writeFromString(String temp){
// Create temporary object
ConnectedThread r;
// Synchronize a copy of the ConnectedThread
synchronized (this) {
if (mState != STATE_CONNECTED) return;
r = mConnectedThread;
}
// Perform the write unsynchronized
r.writeString(temp);
}
和writeString方法如下:
public void writeString(String out) {
try {
if(D) Log.d(TAG, "Sending File....AS STRING");
mmOutStream.write(out.getBytes(), 0, out.getBytes().length);
} catch (IOException e) {
Log.e(TAG, "Exception during write", e);
}
}
在下面的方法
予处理在PC端InputStream的
@Override
public void run() {
try {
// prepare to receive data
InputStream inputStream = mConnection.openInputStream();
System.out.println("waiting for input");
while (true) {
int command = inputStream.read();
if (command == EXIT_CMD)
{
System.out.println("finish process");
break;
}
processCommand(command);
}
} catch (Exception e) {
e.printStackTrace();
}
}
问题再次出现:我如何检索从Android应用程序发送的每组字符串?
检查这个(读/转换的InputStream为String):http://stackoverflow.com/questions/309424/read-convert-an-inputstream-to-a-string –