12-18 21:09:15.104: ERROR/AndroidRuntime(4368): 
android.view.ViewRoot$CalledFromWrongThreadException: Only the original 
thread that created a view hierarchy can touch its views.
i am using google translate api to practice.when i write a new thread,and 
use setText() in this thread, error turn out.where i can set text to 
TextView. my code is as follow:

public class TranslateApp extends Actitvity{

   EditText mEditText;
   TextView mTextView;
   Button btn;

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

mEditText = (EditText) findViewById(R.id.question);
 mTextView = (TextView) findViewById(R.id.answer);
         }

@Override
public void onClick(View arg0) {
Log.i(TAG, "translate begins...");
new Thread(){
public void run(){
 try {
String result = Translator.translate(mEditText.getText());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
 } catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
 }
Log.i(TAG, "translate ends.");
mTextView.setText(result);
}
}.start();
 }

}

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