Инициализация значения для просмотров в ActionBar Вкладка framents в android во время onCreate of Tab Activity

Question

В моем приложении используются фрагменты вкладки ActionBar для создания/изменения сведений об устройстве. Свойства устройства подразделяются на разные фрагменты. Я хочу инициализировать каждый фрагмент в OnCreate из Tab Activity. В каждом фрагменте вкладки есть SetValues ​​ метод, который инициализирует значения для просмотра в фрагменте. Я заметил, что фрагмент создается, когда я нажал на конкретную вкладку.

Tab активность

public class CameraDetails extends Activity { 
private CameraData camera = new CameraData(); 

Fragment network = new NetworkFragment(); 
Fragment remoteUser = new RemoteUserFragment(); 

private G.Interface mNetworkInterface = null; 
private G.Interface mRemoteUserInterface = null;  

/** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.cameradetails); 

    ActionBar actionBar = getActionBar(); 
    actionBar.setDisplayShowHomeEnabled(false); 
    actionBar.setDisplayShowTitleEnabled(false); 
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); 

    // network tab 
    ActionBar.Tab tab = actionBar.newTab(); 
    tab.setText("Network"); 
    tab.setIcon(R.drawable.ic_launcher); 
    tab.setTabListener(new TabListener(network)); 
    actionBar.addTab(tab); 

    // remote user tab 
    tab = actionBar.newTab(); 
    tab.setText("Remote User"); 
    tab.setIcon(R.drawable.ic_launcher); 
    tab.setTabListener(new TabListener(remoteUser)); 
    actionBar.addTab(tab); 

    final Handler handler = new Handler(); 
    handler.postDelayed(new Runnable() { 
     @Override 
     public void run() { 
      init(); 
     } 
    }, 1000); 
} 

public void init(){ 
    try{ 
     byte[] by = new byte[512]; 
     String extStorageDirectory = Environment.getExternalStorageDirectory().toString(); 
     File file = new File(extStorageDirectory, "dump.hex"); 
     BufferedInputStream in = new BufferedInputStream(new FileInputStream(file)); 
     in.read(by); 
     in.close(); 
     camera.set(by); 

     mNetworkInterface.SetValues(); 
     mRemoteUserInterface.SetValues();   

    } catch(Exception e){ 
     e.printStackTrace(); 
    } 

} 

public CameraData getCameraData(){ 
    return camera; 
} 

public void setNetworkListener(G.Interface Interface){ 
    this.mNetworkInterface = Interface; 
} 

public void setRemoteUserListener(G.Interface Interface){ 
    this.mRemoteUserInterface = Interface; 
} 
} 

один из вкладки фрагмента

public class NetworkFragment extends Fragment implements G.Interface { 
View rootView; 
Activity mActivity; 
CameraData camera; 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
    rootView = inflater.inflate(R.layout.network_layout, container, false); 
    Log.i("NetworkFragment", "CreateView"); 
    return rootView; 
} 

@Override 
public void onAttach(Activity activity) { 
    mActivity = activity; 
    ((CameraDetails)mActivity).setNetworkListener(this); 
    camera = ((CameraDetails)mActivity).getCameraData(); 
    Log.i("NetworkFragment", "Activity Attached"); 
    super.onAttach(activity); 
} 

@Override 
public void SetValues() { 
    try { 
     // ip address 
     EditText et = (EditText)rootView.findViewById(R.id.cd_ip_address); 
     et.setText(camera.mNetwork.IPAddress); 

     // subnet mask 
     et = (EditText)rootView.findViewById(R.id.cd_subnetmask); 
     et.setText(camera.mNetwork.SubnetMask); 

     // gateway 
     et = (EditText)rootView.findViewById(R.id.cd_gateway); 
     et.setText(camera.mNetwork.Gateway); 

     // com port 
     et = (EditText)rootView.findViewById(R.id.cd_comm_port); 
     et.setText(""+camera.mNetwork.CommPort); 

     // mimg port 
     et = (EditText)rootView.findViewById(R.id.cd_mimg_port); 
     et.setText(""+camera.mNetwork.MImgPort); 

     // webserver port 
     et = (EditText)rootView.findViewById(R.id.cd_web_server_port); 
     et.setText(""+camera.mNetwork.WebServerPort); 

     // wifi id 
     et = (EditText)rootView.findViewById(R.id.cd_wifi_id); 
     et.setText(camera.mNetwork.WiFiId); 

     // wifi password 
     et = (EditText)rootView.findViewById(R.id.cd_wifi_pwd); 
     et.setText(camera.mNetwork.WiFiPassword); 

     // wifi mode 
     Spinner sp = (Spinner)rootView.findViewById(R.id.cd_wifi_mode); 
     sp.setSelection(camera.mNetwork.WiFiMode, true);    

     Log.i("NetworkFragment", "SetValues OK"); 

    } catch(Exception e){ 

    } 
} 
} 

Иниц метод вкладки активности инициализирует значения в фрагменте NetworkFragment и RemoteUserFragment. Значения инициализируются для NetworkFragment. Но NullPointerException для RemoteUserFragment.

LogCat

06-11 12:06:38.161: W/System.err(677): java.lang.NullPointerException 
    06-11 12:06:38.201: W/System.err(677): at com.mtxlabs.cameraviewer.CameraDetails.init(CameraDetails.java:114) 
    06-11 12:06:38.201: W/System.err(677): at com.mtxlabs.cameraviewer.CameraDetails$1.run(CameraDetails.java:98) 
    06-11 12:06:38.201: W/System.err(677): at android.os.Handler.handleCallback(Handler.java:615) 
    06-11 12:06:38.211: W/System.err(677): at android.os.Handler.dispatchMessage(Handler.java:92) 
    06-11 12:06:38.211: W/System.err(677): at android.os.Looper.loop(Looper.java:137) 
    06-11 12:06:38.211: W/System.err(677): at android.app.ActivityThread.main(ActivityThread.java:4745) 
    06-11 12:06:38.211: W/System.err(677): at java.lang.reflect.Method.invokeNative(Native Method) 
    06-11 12:06:38.211: W/System.err(677): at java.lang.reflect.Method.invoke(Method.java:511) 
    06-11 12:06:38.211: W/System.err(677): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 
    06-11 12:06:38.211: W/System.err(677): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
    06-11 12:06:38.211: W/System.err(677): at dalvik.system.NativeStart.main(Native Method) 

Как я могу решить эту проблему или Есть другой метод используется, чтобы сделать это.

Заранее спасибо

Answer 1

Я назвал SetValues ​​ метод onCreateView фрагмента. Наконец я решил проблему

Основная деятельность

public class CameraDetails extends Activity { 
    private CameraData camera = new CameraData(); 

    Fragment network = new NetworkFragment(); 
    Fragment remoteUser = new RemoteUserFragment(); 
    Fragment rtsp = new RTSPFragmentTab(); 
    Fragment video = new VideoFragmentTab(); 
    Fragment record = new RecordFragmentTab(); 
    Fragment alarm = new AlarmFragmentTab(); 
    Fragment productinfo = new ProductInfoFragmentTab(); 

    private G.Interface mNetworkInterface = null; 
    private G.Interface mRemoteUserInterface = null;  

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.cameradetails); 

     initCameraData(); 

     ActionBar actionBar = getActionBar(); 
     actionBar.setDisplayShowHomeEnabled(false); 
     actionBar.setDisplayShowTitleEnabled(false); 
     actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); 

     // network tab 
     ActionBar.Tab tab = actionBar.newTab(); 
     tab.setText("Network"); 
     tab.setIcon(R.drawable.ic_launcher); 
     tab.setTabListener(new TabListener(network)); 
     actionBar.addTab(tab); 

     // remote user tab 
     tab = actionBar.newTab(); 
     tab.setText("Remote User"); 
     tab.setIcon(R.drawable.ic_launcher); 
     tab.setTabListener(new TabListener(remoteUser)); 
     actionBar.addTab(tab);   
    } 

    public void initCameraData(){ 
     try{ 
      byte[] by = new byte[512]; 
      String extStorageDirectory = Environment.getExternalStorageDirectory().toString(); 
      File file = new File(extStorageDirectory, "dump.hex"); 
      BufferedInputStream in = new BufferedInputStream(new FileInputStream(file)); 
      in.read(by); 
      in.close(); 
      camera.set(by);   
     } catch(Exception e){ 
      e.printStackTrace(); 
     } 

    } 

    public void onClick(View v){ 
     getActionBar().setSelectedNavigationItem(0); 
     if(!mNetworkInterface.Validate()) 
      return; 

     getActionBar().setSelectedNavigationItem(1); 
     if(!mRemoteUserInterface.Validate()) 
      return; 

     try{ 
      byte[] bytes = camera.get(); 
      String extStorageDirectory = Environment.getExternalStorageDirectory().toString(); 
      File file = new File(extStorageDirectory, "dump.hex"); 
      BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(file, false)); 
      out.write(bytes); 
      out.close(); 
      Log.v("Data", "Setup data updated"); 
     } catch (Exception e) { 
      e.printStackTrace(); 
      return ; 
     } 
    } 

    public CameraData getCameraData(){ 
     return camera; 
    } 

    public void setNetworkListener(G.Interface Interface){ 
     this.mNetworkInterface = Interface; 
    } 

    public void setRemoteUserListener(G.Interface Interface){ 
     this.mRemoteUserInterface = Interface; 
    } 

} 

сети Фрагмент

public class NetworkFragment extends Fragment implements G.Interface { 
    View rootView; 
    Activity mActivity; 
    CameraData camera; 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     rootView = inflater.inflate(R.layout.network_layout, container, false); 
     Log.i("NetworkFragment", "CreateView"); 
     SetValues(); 
     return rootView; 
    } 

    @Override 
    public void onAttach(Activity activity) { 
     mActivity = activity; 
     ((CameraDetails)mActivity).setNetworkListener(this); 
     camera = ((CameraDetails)mActivity).getCameraData(); 
     Log.i("NetworkFragment", "Activity Attached"); 
     super.onAttach(activity); 
    } 

    @Override 
    public boolean Validate() { 
     try { 
      String s; 
      int i; 

      // ip address 
      camera.mNetwork.IPAddress = G.GetIPText(rootView, R.id.cd_ip_address); 
      if(camera.mNetwork.IPAddress.isEmpty()){ 
       Toast.makeText(mActivity, "Please enter a valid ip address", Toast.LENGTH_SHORT).show(); 
       return false; 
      } 

      // subnet mask 
      camera.mNetwork.SubnetMask = G.GetIPText(rootView, R.id.cd_subnetmask); 
      if(camera.mNetwork.SubnetMask.isEmpty()){ 
       Toast.makeText(mActivity, "Please enter a valid subnetmask", Toast.LENGTH_SHORT).show(); 
       return false; 
      } 


      // gateway 
      camera.mNetwork.Gateway = G.GetIPText(rootView, R.id.cd_gateway); 
      if(camera.mNetwork.Gateway.isEmpty()){ 
       Toast.makeText(mActivity, "Please enter a valid gateway", Toast.LENGTH_SHORT).show(); 
       return false; 
      } 

      // com port 
      camera.mNetwork.CommPort = G.GetInteger(rootView, R.id.cd_comm_port); 
      if(camera.mNetwork.CommPort < 0){ 
       Toast.makeText(mActivity, "Please enter a valid Communication Port", Toast.LENGTH_SHORT).show(); 
       return false; 
      } 

      // mimg port 
      camera.mNetwork.MImgPort = G.GetInteger(rootView, R.id.cd_mimg_port); 
      if(camera.mNetwork.MImgPort < 0){ 
       Toast.makeText(mActivity, "Please enter a valid MIMG Port", Toast.LENGTH_SHORT).show(); 
       return false; 
      } 

      // webserver port 
      camera.mNetwork.WebServerPort = G.GetInteger(rootView, R.id.cd_web_server_port); 
      if(camera.mNetwork.WebServerPort < 0){ 
       Toast.makeText(mActivity, "Please enter a valid webserver Port", Toast.LENGTH_SHORT).show(); 
       return false; 
      } 

      // wifi id 
      camera.mNetwork.WiFiId = G.GetText(rootView, R.id.cd_wifi_id); 
      if(camera.mNetwork.WiFiId.isEmpty()){ 
       Toast.makeText(mActivity, "Please enter a valid WiFi Id", Toast.LENGTH_SHORT).show(); 
       return false; 
      } 

      // wifi password 
      camera.mNetwork.WiFiPassword = G.GetText(rootView, R.id.cd_wifi_pwd); 
      if(camera.mNetwork.WiFiPassword.isEmpty()){ 
       Toast.makeText(mActivity, "Please enter a valid WiFi Password", Toast.LENGTH_SHORT).show(); 
       return false; 
      } 

      // wifi mode 
      camera.mNetwork.WiFiMode = (byte)G.GetSpinnerOptions(rootView, R.id.cd_wifi_mode); 
      if(camera.mNetwork.WiFiMode == -1){ 
       Toast.makeText(mActivity, "Please select a valid wifi mode from list", Toast.LENGTH_SHORT).show(); 
       return false; 
      } 

      Log.i("NetworkFragment", "Validation OK"); 
     } catch(Exception e){ 
      e.printStackTrace(); 
     } 
     return true; 
    } 

    public void SetValues() { 
     try { 
      // ip address 
      EditText et = (EditText)rootView.findViewById(R.id.cd_ip_address); 
      et.setText(camera.mNetwork.IPAddress); 

      // subnet mask 
      et = (EditText)rootView.findViewById(R.id.cd_subnetmask); 
      et.setText(camera.mNetwork.SubnetMask); 

      // gateway 
      et = (EditText)rootView.findViewById(R.id.cd_gateway); 
      et.setText(camera.mNetwork.Gateway); 

      // com port 
      et = (EditText)rootView.findViewById(R.id.cd_comm_port); 
      et.setText(""+camera.mNetwork.CommPort); 

      // mimg port 
      et = (EditText)rootView.findViewById(R.id.cd_mimg_port); 
      et.setText(""+camera.mNetwork.MImgPort); 

      // webserver port 
      et = (EditText)rootView.findViewById(R.id.cd_web_server_port); 
      et.setText(""+camera.mNetwork.WebServerPort); 

      // wifi id 
      et = (EditText)rootView.findViewById(R.id.cd_wifi_id); 
      et.setText(camera.mNetwork.WiFiId); 

      // wifi password 
      et = (EditText)rootView.findViewById(R.id.cd_wifi_pwd); 
      et.setText(camera.mNetwork.WiFiPassword); 

      // wifi mode 
      Spinner sp = (Spinner)rootView.findViewById(R.id.cd_wifi_mode); 
      sp.setSelection(camera.mNetwork.WiFiMode, true); 


      Log.i("NetworkFragment", "SetValues OK"); 

     } catch(Exception e){ 
      e.printStackTrace(); 
     } 
    } 

} 

В любом случае спасибо @ cricket_007 помог мне понять работу Язычок фрагмент