ImageView中的StartAnimation未在AlertDialog中調用

Question

我在StartAnimation方法中遇到問題。當我試圖在AlertDialog.Builder中的ImageView上啓動動畫（使用佈局膨脹）時，動畫開始正確，但在第一個「幀」之後，它不會繼續他的cicle。 這是我的代碼：

LayoutInflater inflater = (LayoutInflater) context 
      .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 

    View layout = inflater.inflate(R.layout.loading_dialog, null); 

    AlertDialog.Builder builder = new AlertDialog.Builder(context); 
    builder.setView(layout); 


    ImageView img = (ImageView) layout.findViewById(R.id.imgLoadingDialog); 
    Animation shake = AnimationUtils.loadAnimation(context, R.anim.shake_animation); 
    img.startAnimation(shake); 

    return new AlertDialog.Builder(context) 
      .setView(layout); 

這是我animation.xml

<?xml version="1.0" encoding="utf-8"?> 
<rotate xmlns:android="http://schemas.android.com/apk/res/android" 
    android:duration="100" 
    android:fromDegrees="-20" 
    android:pivotX="50%" 
    android:pivotY="50%" 
    android:repeatCount="infinite" 
    android:repeatMode="reverse" 
    android:toDegrees="20" /> 

Answer 1

如果您使用的是DialogFragment，你將不得不重寫onCreateDialog而不是onCreateView如下：

@Override 
    public Dialog onCreateDialog(Bundle savedInstanceState) { 
     AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); 
     View layout = getActivity().getLayoutInflater().inflate(R.layout.list_item, null); 
     builder.setView(layout); 
     ImageView img = (ImageView) layout.findViewById(R.id.iv); 
     Animation anim = AnimationUtils.loadAnimation(getActivity(), R.anim.shake); 
     img.startAnimation(anim); 
     return builder.create(); 
}