崩潰和展開動畫問題android

當我第一次點擊這個動畫時，崩潰並突然自我展開，之後當點擊時它會很好。問題是爲什麼這個動畫第一次自我展開。這裏有專家嗎？崩潰和展開動畫問題android

這是我的XML代碼

<TextView 
     android:drawableRight="@drawable/ic_arrow_down" 
     android:background="#FFF12222" 
     android:textColor="#060606" 
     android:textSize="20sp" 
     android:text="Required Field" 
     android:id="@+id/section_required_field" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content"/> 

    <LinearLayout 
     android:orientation="vertical" 
     android:id="@+id/layout_required_fields" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content"> 

     <TextView 
      android:layout_marginTop="10dp" 
      android:id="@+id/tile_head" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="Title" 
      android:textSize="16sp" 
      android:textColor="#060606"/> 

     <EditText 
      android:id="@+id/title" 
      android:layout_width="270sp" 
      android:layout_height="wrap_content" 
      android:text="abcd" 
      android:layout_marginTop="2dp" 
      android:background="@drawable/rounded_edittext" 
      android:textSize="15sp"/> 

     <TextView 
      android:id="@+id/description_head" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_marginTop="20sp" 
      android:text="Description" 
      android:textSize="15sp" 
      android:textColor="#060606"/> 

     <EditText 
      android:id="@+id/video_description" 
      android:layout_width="270sp" 
      android:layout_height="wrap_content" 
      android:layout_marginTop="2sp" 
      android:text="abcd" 
      android:background="@drawable/rounded_edittext" 
      android:textSize="15sp"/> 

     <TextView 
      android:id="@+id/category_head" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_marginTop="20sp" 
      android:text="Category" 
      android:textSize="15sp" 
      android:textColor="#060606"/> 

     <TextView 
      android:id="@+id/video_category" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_marginTop="2sp" 
      android:text="abcd" 
      android:textSize="15sp" 
      android:textColor="#060606"/> 

     <TextView 
      android:id="@+id/tags_head" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_marginTop="20sp" 
      android:text="Tags" 
      android:textSize="15sp" 
      android:textColor="#060606"/> 

     <EditText 
      android:id="@+id/tags" 
      android:layout_width="270sp" 
      android:layout_height="wrap_content" 
      android:layout_marginTop="2sp" 
      android:text="abcd" 
      android:textSize="15sp" 
      android:background="@drawable/rounded_edittext" 
      android:textColor="#060606"/> 

    </LinearLayout>

這是我的java類動畫

public class AnimationUtils { 

    public static void expand(final View v) { 
     v.measure(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); 
     final int targetHeight = v.getMeasuredHeight(); 

     // Older versions of android (pre API 21) cancel animations for views with a height of 0. 
     v.getLayoutParams().height = 1; 
     v.setVisibility(View.VISIBLE); 
     Animation a = new Animation() 
     { 
      @Override 
      protected void applyTransformation(float interpolatedTime, Transformation t) { 
       v.getLayoutParams().height = interpolatedTime == 1 
         ? ViewGroup.LayoutParams.WRAP_CONTENT 
         : (int)(targetHeight * interpolatedTime); 
       v.requestLayout(); 
      } 

      @Override 
      public boolean willChangeBounds() { 
       return true; 
      } 
     }; 

     // 1dp/ms 
     a.setDuration((int)(targetHeight/v.getContext().getResources().getDisplayMetrics().density)); 
     v.startAnimation(a); 
    } 

    public static void collapse(final View v) { 
     final int initialHeight = v.getMeasuredHeight(); 

     Animation a = new Animation() 
     { 
      @Override 
      protected void applyTransformation(float interpolatedTime, Transformation t) { 
       if(interpolatedTime == 1){ 
        v.setVisibility(View.GONE); 
       }else{ 
        v.getLayoutParams().height = initialHeight - (int)(initialHeight * interpolatedTime); 
        v.requestLayout(); 
       } 
      } 

      @Override 
      public boolean willChangeBounds() { 
       return true; 
      } 
     }; 

     // 1dp/ms 
     a.setDuration((int)(initialHeight/v.getContext().getResources().getDisplayMetrics().density)); 
     v.startAnimation(a); 
    } 
}

，這是我的java類代碼

tvRequiredField = (TextView) findViewById(R.id.section_required_field); 
     requiredFieldsLayout = (LinearLayout) findViewById(R.id.layout_required_fields); 
     tvRequiredField.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if (v.isSelected()) { 
        AnimationUtils.collapse(requiredFieldsLayout); 
        v.setSelected(false); 
       } 
       else { 
        AnimationUtils.expand(requiredFieldsLayout); 
        v.setSelected(true); 
       } 
      } 
     });

來源

2016-10-26 iam john

我得到了我的錯誤

tvRequiredField = (TextView) findViewById(R.id.section_required_field); 
     requiredFieldsLayout = (LinearLayout) findViewById(R.id.layout_required_fields); 
     tvRequiredField.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if (v.isSelected()) {//this should be expand instead of collapse 
        AnimationUtils.collapse(requiredFieldsLayout); 
        v.setSelected(false); 
       } 
       else {//this should be collapse instead of expand 
        AnimationUtils.expand(requiredFieldsLayout); 
        v.setSelected(true); 
       } 
      } 
     });

來源

2016-10-26 17:46:44

崩潰和展開動畫問題android

回答

相關問題