GridView的回报只有一行 [英] Gridview return only one row

问题描述

我使用的是的GridView 在相对布局。我想在的GridView 显示 高达根据需要显示所有的行一样高。但是，我只看到 当设置一排（ layout_width = MATCH_PARENT 和） layout_height = WRAP_CONTENT 。如果我设置layout_height到大小 等于多张行，然后我看到这些行。

I am using a GridView in a Relative layout. I want the GridView to show up as tall as needed to show all the rows. However, I am seeing only one row when set (layout_width=MATCH_PARENT and) layout_height=WRAP_CONTENT. If I set layout_height to a size that equals mulitple rows, then I do see those rows.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
>

<RelativeLayout
    android:id="@+id/layout_month"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
     >

    <TextView
        android:id="@+id/textv_month_name"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:clickable="false"
        android:gravity="center_horizontal|center_horizontal"
        android:textColor="#ffffff"
        android:textSize="7dp" />

    <ImageView
        android:id="@+id/top_bar"
        android:layout_width="fill_parent"
        android:layout_height="15dp"
        android:layout_below="@+id/textv_month_name"
        android:background="@drawable/calendar_top_small"
        android:clickable="false" />

    <GridView
        android:id="@+id/gridv_inner"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/top_bar"
        android:layout_gravity="center"
        android:clickable="false"
        android:gravity="center"
        android:numColumns="7"
        android:stretchMode="columnWidth"
         >
    </GridView>

    <Button
        android:id="@+id/monthBtn"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:background="@android:color/transparent" />
</RelativeLayout>

</RelativeLayout>

任何帮助将AP preciable

Any Help will be appreciable

推荐答案

这是一个非常有用的答案。

This is a very useful answer.

的GridView的不喜欢它，当它被放置在垂直方向狭小的空间高度的WRAP_CONTENT;它仅表现的项目的单排（滚动在于单列的所有内容）。

The GridView didn’t like the wrap_content of its height when it was put in a vertically tight space; it only showed a single row of items (scrolling all content in that single row).

短的版本我修复包括子分级GridView和覆盖onMeasure方法。此修复程序的精髓集中在测量高度规范设置为一个大得离谱的数字。

The short version of my fix includes sub classing the GridView and overriding the onMeasure method. The essence of the fix focuses on setting the measured height spec to a ridiculously large number.

MyGridview.Java

MyGridview.Java

   package com.arun.calendar;

   import android.content.Context;
   import android.util.AttributeSet;
   import android.widget.GridView;

   public class MyGridView extends GridView {

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

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

    public MyGridView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

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

        if (getLayoutParams().height == LayoutParams.WRAP_CONTENT) {

            // The two leftmost bits in the height measure spec have
            // a special meaning, hence we can't use them to describe height.
            heightSpec = MeasureSpec.makeMeasureSpec(
                    Integer.MAX_VALUE >>2, MeasureSpec.AT_MOST);
        }
        else {
            // Any other height should be respected as is.
            heightSpec = heightMeasureSpec;
        }

        super.onMeasure(widthMeasureSpec, heightSpec);
    }
}

和新的XML文件

   <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center" >

<RelativeLayout
    android:id="@+id/layout_month"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <TextView
        android:id="@+id/textv_month_name"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:clickable="false"
        android:gravity="center_horizontal|center_horizontal"
        android:textColor="#ffffff"
        android:textSize="7dp" />

    <ImageView
        android:id="@+id/top_bar"
        android:layout_width="fill_parent"
        android:layout_height="15dp"
        android:layout_below="@+id/textv_month_name"
        android:background="@drawable/calendar_top_small"
        android:clickable="false" />

    <com.arun.calendar.MyGridView
        android:id="@+id/gridv_inner"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/top_bar"
        android:layout_gravity="center"
        android:clickable="false"
        android:gravity="center"
        android:numColumns="7"
        android:stretchMode="columnWidth" />
</RelativeLayout>

<Button
    android:id="@+id/monthBtn"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@android:color/transparent" />

</RelativeLayout>

和java中的文件

 MyGridView  viewHolder.gridView = (MyGridView) v.findViewById(R.id.gridv_inner);

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