我在EditText上尝试显示文本，但没有显示任何问题，代码是这样的：
public void run()
{
String mensaje;
while(true)
{
try
{
mensaje = b.readLine();
Log.d("mensaje", mensaje);
_et_ip.setText(mensaje);
}
catch (IOException e){e.printStackTrace();}
}
}
主类实现了runnable
public class ClienteTcpAnroid extends Activity implements Runnable
和Log.d显示消息正确，但_et_ip.setText（mensaje）没有显示消息。
我正在使用android模拟器
非常感谢你
这是所有代码：
public class ClienteTcpAnroid extends Activity implements Runnable
{
private static String myIP;
private static String myPort;
String mensaje;
Thread threadProcesaAlarmas;
public TextView _tv_estado;
public EditText _et_ip;
public EditText _et_port;
public Button botonConectar;
BufferedReader b;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
_tv_estado = (TextView)findViewById(R.id.tv_estado);
_et_ip = (EditText)findViewById(R.id.et_ip);
_et_port = (EditText)findViewById(R.id.et_port);
botonConectar = (Button)findViewById(R.id.button1);
botonConectar.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
Socket mySocket;
PrintStream p;
try
{
mySocket = new Socket("192.168.1.35", 12345);
b = new BufferedReader(new InputStreamReader(mySocket.getInputStream()));
threadProcesaAlarmas = new Thread(ClienteTcpAnroid.this);
threadProcesaAlarmas.start();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
@Override
public void run()
{
String mensaje;
while(true)
{
try
{
mensaje = b.readLine();
Log.d("mensaje", mensaje);
_et_ip.setText(mensaje);
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
非常感谢你
这是日志：
11-03 20:01:08.507: D/mensaje(957): mensaje0
11-03 20:01:08.507: W/dalvikvm(957): threadid=9: thread exiting with uncaught exception (group=0x40015560)
11-03 20:01:08.536: E/AndroidRuntime(957): FATAL EXCEPTION: Thread-10
11-03 20:01:08.536: E/AndroidRuntime(957): android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
11-03 20:01:08.536: E/AndroidRuntime(957): at android.view.ViewRoot.checkThread(ViewRoot.java:2932)
11-03 20:01:08.536: E/AndroidRuntime(957): at android.view.ViewRoot.invalidateChild(ViewRoot.java:642)
11-03 20:01:08.536: E/AndroidRuntime(957): at android.view.ViewRoot.invalidateChildInParent(ViewRoot.java:668)
11-03 20:01:08.536: E/AndroidRuntime(957): at android.view.ViewGroup.invalidateChild(ViewGroup.java:2511)
11-03 20:01:08.536: E/AndroidRuntime(957): at android.view.View.invalidate(View.java:5255)
11-03 20:01:08.536: E/AndroidRuntime(957): at android.widget.TextView.invalidateCursor(TextView.java:3683)
11-03 20:01:08.536: E/AndroidRuntime(957): at android.widget.TextView.spanChange(TextView.java:6390)
11-03 20:01:08.536: E/AndroidRuntime(957): at android.widget.TextView$ChangeWatcher.onSpanAdded(TextView.java:6515)
11-03 20:01:08.536: E/AndroidRuntime(957): at android.text.SpannableStringBuilder.sendSpanAdded(SpannableStringBuilder.java:906)
11-03 20:01:08.536: E/AndroidRuntime(957): at android.text.SpannableStringBuilder.setSpan(SpannableStringBuilder.java:611)
11-03 20:01:08.536: E/AndroidRuntime(957): at android.text.SpannableStringBuilder.setSpan(SpannableStringBuilder.java:514)
11-03 20:01:08.536: E/AndroidRuntime(957): at android.text.Selection.setSelection(Selection.java:74)
11-03 20:01:08.536: E/AndroidRuntime(957): at android.text.Selection.setSelection(Selection.java:85)
11-03 20:01:08.536: E/AndroidRuntime(957): at android.text.method.ArrowKeyMovementMethod.initialize(ArrowKeyMovementMethod.java:268)
11-03 20:01:08.536: E/AndroidRuntime(957): at android.widget.TextView.setText(TextView.java:2712)
11-03 20:01:08.536: E/AndroidRuntime(957): at android.widget.TextView.setText(TextView.java:2592)
11-03 20:01:08.536: E/AndroidRuntime(957): at android.widget.EditText.setText(EditText.java:78)
11-03 20:01:08.536: E/AndroidRuntime(957): at android.widget.TextView.setText(TextView.java:2567)
11-03 20:01:08.536: E/AndroidRuntime(957): at packag.Android.ClienteTcpAnroid.run(ClienteTcpAnroid.java:80)
11-03 20:01:08.536: E/AndroidRuntime(957): at java.lang.Thread.run(Thread.java:1019)
11-03 20:01:08.566: W/ActivityManager(77): Force finishing activity packag.Android/.ClienteTcpAnroid
11-03 20:01:08.767: W/IInputConnectionWrapper(957): showStatusIcon on inactive InputConnection
谢谢凯文
答案 0 :(得分：1)
行。问题＃1，你正在吃你的例外。我很确定（虽然它可能会改变吗？）e.printStackTrace（）什么都不做。您需要使用Log记录它们，或者使用RuntimeException进行换行和抛出（我更喜欢失败而不是静静地忽略，所以我选择了后者）。
你有2种方法可以做到这一点（好吧，有几种，但我们将讨论2）。
1）在AsyncTask中执行背景内容。我会选择那个。比创建/管理自己的线程容易得多。
2）保留您的代码，但是当您更新UI时，请使用在UI线程中创建的处理程序来执行此操作。
public class ClienteTcpAnroid extends Activity implements Runnable
{
private static String myIP;
private static String myPort;
String mensaje;
Thread threadProcesaAlarmas;
public TextView _tv_estado;
public EditText _et_ip;
public EditText _et_port;
public Button botonConectar;
BufferedReader b;
private Handler handler;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
_tv_estado = (TextView) findViewById(R.id.tv_estado);
_et_ip = (EditText) findViewById(R.id.et_ip);
_et_port = (EditText) findViewById(R.id.et_port);
botonConectar = (Button) findViewById(R.id.button1);
botonConectar.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
Socket mySocket;
PrintStream p;
try
{
mySocket = new Socket("192.168.1.35", 12345);
b = new BufferedReader(new InputStreamReader(mySocket.getInputStream()));
threadProcesaAlarmas = new Thread(ClienteTcpAnroid.this);
threadProcesaAlarmas.start();
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
});
handler = new Handler();
}
@Override
public void run()
{
while (true)
{
try
{
final String mensaje = b.readLine();
Log.d("mensaje", mensaje);
handler.post(new Runnable()
{
public void run()
{
_et_ip.setText(mensaje);
}
});
}
catch (IOException e)
{
throw new RuntimeException(e);
}
}
}
}
我认为套接字读取是阻塞的。当然，你有一个“无限循环”，但这不是一个大问题，因为它阻止了。我唯一建议的是在onPause中找出如何切断它。
同样顺便说一下，忘了AsyncTask。直到现在才意识到你要做的确切事情。线程是要走的路。好吧，我认为服务是可行的方法，但这样可行。