SquareLinearLayout（高等于宽的自适应LinearLayout）

Android环境

GridView等场景，指定每行个数、行数，SquareLinearLayout就会自适应填满GridView

[1].[代码] 正方形 跳至 [1] [2] [3]

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public class SquareLinearLayout extends LinearLayout {
 
     public SquareLinearLayout(Context context) {
         super (context);
     }
 
     public SquareLinearLayout(Context context, AttributeSet attrs) {
         super (context, attrs);
     }
     
     @Override
     public void onMeasure( int widthMeasureSpec, int heightMeasureSpec) {
     
         super .onMeasure(widthMeasureSpec, widthMeasureSpec);
     }
     
}

[2].[代码] 自定义高宽比 跳至 [1] [2] [3]

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public class SquareLinearLayout extends LinearLayout {
 
     public SquareLinearLayout(Context context) {
         super (context);
     }
 
     public SquareLinearLayout(Context context, AttributeSet attrs) {
         super (context, attrs);
     }
     
     @Override
     public void onMeasure( int widthMeasureSpec, int heightMeasureSpec) {
         int width = MeasureSpec.getSize(widthMeasureSpec);
         int height = Math.round(width* 0 .9f);
         int mode = MeasureSpec.getMode(widthMeasureSpec);
         super .onMeasure(MeasureSpec.makeMeasureSpec(width, mode), MeasureSpec.makeMeasureSpec(height, mode));
     }
     
}

[3].[代码] girdview_item.xml 跳至 [1] [2] [3]

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<? xml version = "1.0" encoding = "utf-8" ?>
< com.custom.SquareLinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"
     android:layout_width = "match_parent"
     android:layout_height = "match_parent"
     android:gravity = "center"
     android:orientation = "vertical" >
 
     < LinearLayout
         android:layout_width = "fill_parent"
         android:layout_height = "fill_parent"
         android:gravity = "center"
         android:orientation = "vertical" >
 
         < TextView
             android:id = "@+id/name"
             android:layout_width = "wrap_content"
             android:layout_height = "wrap_content"
             android:textColor = "@android:color/black" />
 
         < ImageView
             android:id = "@+id/icon"
             android:layout_width = "wrap_content"
             android:layout_height = "wrap_content" />
 
     </ LinearLayout >
 
</ com.custom.SquareLinearLayout >

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