Java Android SetText funktioniert nicht

Question

Meine Client-Klasse sollte die Werte von x_atual, y_atual usw. geben ... Ich habe versucht, den Code zu debuggen, indem Sie die letzten zwei Zeilen des Codes kommentieren und der Settext funktioniert überhaupt nicht. Die TextViews haben immer noch den gleichen Defeult-Text.

public class SecondActivity extends AppCompatActivity { 

TextView x_atual,y_atual,x_desejado,y_desejado,ola; 
Cliente myClient; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_second); 

    x_atual = (TextView) findViewById(R.id.x_atual); 
    y_atual = (TextView) findViewById(R.id.y_atual); 
    x_desejado = (TextView) findViewById(R.id.x_desej); 
    y_desejado = (TextView) findViewById(R.id.y_desej); 
    ola = (TextView) findViewById(R.id.textView12); 

    x_atual.setText("0"); 
    y_atual.setText("0"); 
    x_desejado.setText("0"); 
    y_desejado.setText("0"); 
    ola.setText("ola"); 

    myClient = new Cliente(x_atual,y_atual,x_desejado,y_desejado); 
    myClient.execute(); 
} 


} 

Ich habe mehrere Fragmente, aber ich denke nicht, dass es das ist.

public class Cliente extends AsyncTask<Void,String,Void> { 

    String dstAddress; 
    int dstPort; 
    TextView x_atual,y_atual,x_desejado,y_desejado; 
    Scanner r; 
    String[] valores = new String[4]; 

    public Cliente(String addr, int port) { 
     //super(); 
     dstAddress = addr; 
     dstPort = port; 
    } 

    public Cliente(TextView x_atual,TextView y_atual, TextView x_desejado, TextView y_desejado) { 
     //super(); 
     this.x_atual = x_atual; 
     this.y_atual = y_atual; 
     this.x_desejado = x_desejado; 
     this.y_desejado = y_desejado; 
    } 

    @Override 
    protected Void doInBackground(Void... params) { 

     Socket socket = null; 

     try { 
      socket = new Socket(dstAddress, dstPort); 

      r = new Scanner(new InputStreamReader(socket.getInputStream())); 

     } catch (UnknownHostException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

     valores[0] = r.nextLine(); 
     valores[1] = r.nextLine(); 
     valores[2] = r.nextLine(); 
     valores[3] = r.nextLine(); 
     publishProgress(valores[0],valores[1],valores[2],valores[3]); 
try { 
    Thread.sleep(60); 
} catch (InterruptedException e) { 
    e.printStackTrace(); 
} 
     return null; 
    } 

    @Override 
    protected void onPostExecute(Void result) { 
     x_atual.setText(valores[0]); 
     y_atual.setText(valores[1]); 
     x_desejado.setText(valores[2]); 
     y_desejado.setText(valores[3]); 
     super.onPostExecute(result); 
    } 

} 

Answer 1

Das liegt daran, dass beim Aufruf von setText die View-Creations noch nicht fertig sind.

x_atual.post(new Runnable() { 
     @Override 
     public void run() { 
      x_atual.setText("hi!"); 
     } 
    }); 

Tun Sie dies für jeden einzelnen.

Dies wartet, bis die Ansicht beendet ist, und dann wird Text gesetzt.