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这已被讨论过很多次，但它仍然是我真正的痛苦。TextView更新崩溃应用程序
问题：应用程序崩溃时，我尝试更新它的文本TextView的
背景：使用蓝牙的应用程序的多线程林。 “侦听”线程（ConnectedThread）在获得新消息时发送Handler。该处理程序然后在初始化TextView的主Activity中解析。
我曾尝试/ CHECKED至今：
- 我想我不会从不同的活动更新的TextView /线程
- TextView的的setContentView（R.layout.main）之后进行初始化; （当然，在其他岗位，这是造成麻烦）
CODE：（简称）
主要活动
public class BluetoothActivity extends Activity {
private TextView mDisplay;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
.....
..
}
private void setupApp() {
// Initialize the BluetoothService to perform bluetooth connections
// This is where the Handler is passed to "ConnectedThread" (it is part of
mService)
mService = new BluetoothService(this, mHandler);
}
// The Handler that gets information back from the BluetoothService
private final Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
......
case MESSAGE_READ:
byte[] readBuf = (byte[]) msg.obj;
// construct a string from the valid bytes in the buffer
String readMessage = new String(readBuf, 0, msg.arg1);
if(D) Log.d(TAG, "Received: " + readMessage);
mDisplay.setText(readMessage); <----- THIS IS THE ISSUE
break;
.......
....
}
}
};
连螺纹
private class ConnectedThread extends Thread {
......
public void run() {
byte[] buffer = new byte[1024];
int bytes;
// Keep listening to the InputStream while connected
while (true) {
try {
// Read from the InputStream
bytes = mmInStream.read(buffer);
// Send the obtained bytes to the UI Activity
mHandler.obtainMessage(BluetoothActivity.MESSAGE_READ, bytes, -1, buffer)
.sendToTarget();
} catch ...
}
}
}
这主要是该功能可以显示收到的消息
Toast.makeText(getApplicationContext(), "Received: " + readMessage,
Toast.LENGTH_SHORT).show();