爲什麼我的動畫沒有開始？

Question

對不起，這裏有新東西。

的問題是：

我有當應用程序試圖從一個RESTful servive取一些數據旋轉的可繪製的。

在MainActvity的onCreate（）方法中工作正常，但是，當AssycTask類無法獲取數據時，會向等待同步的處理程序發送消息，然後調用Handler（）。postDelayed（）用重置動畫和更新gui的方法。 UI已更新，但動畫不會再次啓動。

一些代碼：

OnCreate中（）運行OK：

Animation animation = AnimationUtils.loadAnimation(this, R.anim.rotate_view); 
    animation.setRepeatCount(1000); 
    animation.setRepeatMode(Animation.RESTART); 
    navHeaderLilCategoria.setAnimation(animation); 
    animation.start(); 

動畫/ rotateview：從AssyncTask嘗試連接的服務器

<?xml version="1.0" encoding="utf-8"?> 
<rotate xmlns:android="http://schemas.android.com/apk/res/android" 
    android:fromDegrees="0" 
    android:toDegrees="360" 
    android:pivotX="50%" 
    android:pivotY="50%" 
    android:duration="2000" 
    android:interpolator="@android:anim/linear_interpolator" 
/> 

處理程序接收到消息，其在一個單身人士控制應用程序。如果斜面獲取數據時，UI設置爲不連接狀態，則調度新嘗試postDelayed（）：

public void handleMessage(Message msg) { 
     if(msg.what == ResourceManagerStatusTypes.OPERATION_OK || msg.what == ResourceManagerStatusTypes.GETTING_DONE) 
     { 
      triesToGetVinculoAtivo=0; 
      rootActivity.updateVinculoChanged((Vinculo) msg.obj, false); 
     }else{ 
      triesToGetVinculoAtivo++; 
      new Handler(Looper.getMainLooper()).postDelayed(new Runnable() { 
       @Override 
       public void run() { 
        rootActivity.updateVinculoChanged(null,true); 
        vinculosManager.getVinculoAtivoPopulated(new HandlerForVinculoAtivoPopulated(false)); 
       } 
      },MILLIS_FOR_EACH_TRY_TO_GET_VINCULO_ATIVO*triesToGetVinculoAtivo); 
      rootActivity.updateVinculoChanged(vinculosManager.getVinculoAtivo(),false); 
     } 
    } 

，更新其爲NavigationView的報頭內的UI的方法：

public void updateVinculoChanged(Vinculo vinculoAtivo, boolean syncAgain) { 
    navHeaderLilCategoria.clearAnimation(); 
    if(!syncAgain) { 
     if (vinculoAtivo != null) { 
      Imovel currentImovel = vinculoAtivo.getImovel(); 
      if (currentImovel != null) { 
       String categoria = currentImovel.getCategoria(); 
       if (categoria == null || categoria.trim().equals("")) { 
        navHeaderImvCategoria.setImageResource(R.mipmap.ic_error_icon); 
       } else if (categoria.equals(getString(R.string.imovel_categoria_residencial))) { 
        navHeaderImvCategoria.setImageResource(R.mipmap.ic_home); 
       } else if (categoria.equals(getString(R.string.imovel_categoria_comercial))) { 
        navHeaderImvCategoria.setImageResource(R.mipmap.ic_commerce); 
       } else { 
        navHeaderImvCategoria.setImageResource(R.mipmap.ic_industry); 
       } 
       if (vinculoAtivo.getDocType() == Vinculo.CPF) 
        navHeaderTxvDocumento.setText(FrazoUtils.maskToCPF(vinculoAtivo.getDocumento(), this)); 
       else if (vinculoAtivo.getDocType() == Vinculo.CNPJ) { 
        navHeaderTxvDocumento.setText(FrazoUtils.maskToCNPJ(vinculoAtivo.getDocumento(), this)); 
       } else { 
        navHeaderTxvDocumento.setText(vinculoAtivo.getDocumento()); 
       } 
       navHeaderTxvMatricula.setText(String.valueOf(vinculoAtivo.getMatricula())); 
       navHeaderTxvNome.setTextColor(ContextCompat.getColor(this, R.color.white)); 
       navHeaderTxvNome.setText(currentImovel.getNome()); 
       navHeaderTxvNome.setTextColor(ContextCompat.getColor(this, R.color.white)); 
       navHeaderTxvEndereco.setText(FrazoUtils.extractEnderecoFromImovel(currentImovel)); 
       navigationView.getMenu().setGroupEnabled(R.id.nav_menu_grp_com_matricula,true); 
      } else { 
       navHeaderImvCategoria.setImageResource(R.mipmap.ic_no_conection); 
       if (vinculoAtivo.getDocType() == Vinculo.CPF) 
        navHeaderTxvDocumento.setText(FrazoUtils.maskToCPF(vinculoAtivo.getDocumento(), this)); 
       else if (vinculoAtivo.getDocType() == Vinculo.CNPJ) { 
        navHeaderTxvDocumento.setText(FrazoUtils.maskToCNPJ(vinculoAtivo.getDocumento(), this)); 
       } else { 
        navHeaderTxvDocumento.setText(vinculoAtivo.getDocumento()); 
       } 
       navHeaderTxvMatricula.setText(String.valueOf(vinculoAtivo.getMatricula())); 
       navHeaderTxvNome.setTextColor(ContextCompat.getColor(this, R.color.red)); 
       navHeaderTxvNome.setText(getResources().getString(R.string.no_conection)); 
       navHeaderTxvEndereco.setTextColor(ContextCompat.getColor(this, R.color.red)); 
       navHeaderTxvEndereco.setText(getResources().getString(R.string.no_conection)); 
       navigationView.getMenu().setGroupEnabled(R.id.nav_menu_grp_com_matricula,false); 
      } 
     } else { 
      navHeaderImvCategoria.setImageResource(R.mipmap.ic_error_icon); 
      navHeaderTxvDocumento.setText(getResources().getString(R.string.ative_um_vinculo)); 
      navHeaderTxvMatricula.setText(getResources().getString(R.string.sem_dados)); 
      navHeaderTxvNome.setTextColor(ContextCompat.getColor(this, R.color.white)); 
      navHeaderTxvNome.setText(getResources().getString(R.string.sem_dados)); 
      navHeaderTxvEndereco.setTextColor(ContextCompat.getColor(this, R.color.white)); 
      navHeaderTxvEndereco.setText(getResources().getString(R.string.sem_dados)); 
      navigationView.getMenu().setGroupEnabled(R.id.nav_menu_grp_com_matricula,false); 
     } 
    }else 
    { 
     navHeaderImvCategoria.setImageResource(R.mipmap.ic_sync); 
     Animation animation = AnimationUtils.loadAnimation(this, R.anim.rotate_view); 
     animation.setRepeatCount(1000); 
     animation.setRepeatMode(Animation.RESTART); 
     navHeaderLilCategoria.setAnimation(animation); 
     animation.startNow(); 
     navHeaderTxvDocumento.setText(getResources().getString(R.string.sincronizando)); 
     navHeaderTxvMatricula.setText(getResources().getString(R.string.sincronizando)); 
     navHeaderTxvNome.setTextColor(ContextCompat.getColor(this, R.color.white)); 
     navHeaderTxvNome.setText(getResources().getString(R.string.sincronizando)); 
     navHeaderTxvEndereco.setTextColor(ContextCompat.getColor(this, R.color.white)); 
     navHeaderTxvEndereco.setText(getResources().getString(R.string.sincronizando)); 
     navigationView.getMenu().setGroupEnabled(R.id.nav_menu_grp_com_matricula,false); 
    } 
} 

對不起，我的英語不好，和壞的代碼，請幫我...

也許有用的信息： 其上的應用程序只運行一個活動，我只是改變一個佈局內的活動，爲了澄清，我請撥打以下方法：

public boolean onNavigationItemSelected(MenuItem item) { 
    // Handle navigation view item clicks here. 
    int id = item.getItemId(); 

    if(id == R.id.nav_menu_vinculos) 
    { 
     if(currentViewId!=R.layout.layout_vinculos) { 
      changeCurrentView(R.layout.layout_vinculos,new VinculosViewController(this)); 
     } 
    } 
    if(id == R.id.nav_2_via) 
    { 
     if(currentViewId!=R.layout.layout_list_vinculos_row) { 
      changeCurrentView(R.layout.layout_list_vinculos_row,null); 
     } 
    } 
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.main_layout); 
    drawer.closeDrawer(GravityCompat.START); 
    return true; 
} 

和：

public ViewGroup changeCurrentView(int newViewId, GUIController guiController) 
{ 
    removeGoneInvisible(currentView); 
    TransitionManager.beginDelayedTransition(rootChangeableLayout); 
    rootChangeableLayout.removeView(currentView); 
    currentViewId = newViewId; 
    currentView = (ViewGroup) getLayoutInflater().inflate(newViewId, null); 
    ViewGroup.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT); 
    rootChangeableLayout.addView(currentView, params); 
    if(guiController!=null) { 
     guiController.control(currentView); 
    } 
    rootChangeableLayout.invalidate(); 
    return currentView; 
} 

Answer 1

設置你的下面的代碼的onResume（）

Animation animation = AnimationUtils.loadAnimation(this, R.anim.rotate_view); 
animation.setRepeatCount(1000); 
animation.setRepeatMode(Animation.RESTART); 
navHeaderLilCategoria.setAnimation(animation); 
animation.start();