子元素溢出自定義RelativeLayout

我做了一個自定義視圖，它擴展了PercentRelativeLayout並強制視圖是二次的。這個視圖的子元素應該匹配他們父母的大小（高度和寬度）。如果我將孩子的layout_width或layout_height設置爲match_parent或fill_parent，它們會覆蓋父視圖（如您在圖片的右半部分所看到的）。子元素在自定義佈局外不可見，但我無法通過相對大小正確對齊子元素。子元素溢出自定義RelativeLayout

該自定義視圖：

public class QuadraticPercentRelativeLayout extends PercentRelativeLayout { 

    public QuadraticPercentRelativeLayout(Context context) { 
     super(context); 
    } 

    public QuadraticPercentRelativeLayout(Context context, AttributeSet attrs) { 
     super(context, attrs); 
    } 

    public QuadraticPercentRelativeLayout(Context context, AttributeSet attrs, int defStyleAttr) { 
     super(context, attrs, defStyleAttr); 
    } 

    @Override 
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
     super.onMeasure(widthMeasureSpec, heightMeasureSpec); 

     int width = getMeasuredWidth(); 
     int height = getMeasuredHeight(); 
     int size = width < height ? width : height; 
     setMeasuredDimension(size, size); 
    } 
}

這裏是我的佈局（簡化）：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
       xmlns:app="http://schemas.android.com/apk/res-auto" 
       xmlns:tools="http://schemas.android.com/tools" 
       android:layout_width="match_parent" 
       android:layout_height="match_parent" 
       android:paddingBottom="@dimen/activity_vertical_margin" 
       android:paddingLeft="@dimen/activity_horizontal_margin" 
       android:paddingRight="@dimen/activity_horizontal_margin" 
       android:paddingTop="@dimen/activity_vertical_margin"> 

    <QuadraticPercentRelativeLayout 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true" 
     android:layout_below="@+id/progress_bar"> 

     <ImageView 
      android:id="@+id/page_view" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:layout_centerHorizontal="true" 
      android:scaleType="fitCenter" 
      app:srcCompat="@drawable/package_stock"/> 

     <ImageView 
      android:id="@+id/next_view" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:layout_alignBottom="@+id/page_view" 
      android:layout_alignParentEnd="true" 
      android:layout_alignParentRight="true" 
      app:layout_widthPercent="35%" 
      app:srcCompat="@color/ColorPrimaryDark"/> 

     <ImageView 
      android:id="@+id/previous_view" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:layout_alignBottom="@+id/page_view" 
      android:layout_alignParentLeft="true" 
      android:layout_alignParentStart="true" 
      app:layout_widthPercent="35%" 
      app:srcCompat="@color/ColorPrimaryDark"/> 

    </QuadraticPercentRelativeLayout> 

</RelativeLayout>

這對兒童瀏覽標準的行爲嗎？我怎樣才能改變它使孩子符合父母的大小？

來源

2016-11-08 Basti Destruction

我固定在QuadraticPercentRelativeLayout類的onMeasure方法：

@Override 
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
    int width = MeasureSpec.getSize(widthMeasureSpec); 
    int height = MeasureSpec.getSize(heightMeasureSpec); 
    int size = Math.min(width, height); 
    int measureSpec = MeasureSpec.makeMeasureSpec(size, MeasureSpec.EXACTLY); 
    super.onMeasure(measureSpec, measureSpec); 
}

來源

2016-11-08 21:54:03

子元素溢出自定義RelativeLayout

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