Question

我在ListView上工作，每行有两个方形的imageViews。 drawable由url动态给出。问题是图片不适合屏幕。

来自网址的图片已经是正方形，但我想让图片向上或向下缩放以适合屏幕。

现在它看起来像第一个截图，但我希望它们看起来像第二个。

http://dev.ts.hs.kr/jjhoon713/images/b.png

http://dev.ts.hs.kr/jjhoon713/images/a.png

<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"

android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="1"
>

<ImageView 
    android:id="@+id/list_item_image1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:adjustViewBounds="true"
    android:scaleType="centerCrop"
    />


<ImageView 
    android:id="@+id/list_item_image2"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:adjustViewBounds="true"
    android:scaleType="centerCrop"
    />
</LinearLayout>

这是适配器

public class ListAdapter extends ArrayAdapter<ListItem>{

private ArrayList<ListItem> items;
private Activity context;
private static LayoutInflater inflater = null;
public ImageLoader imageLoader;



public ListAdapter(Activity context, int textViewResourceId, ArrayList<ListItem> items)
{
    super(context, textViewResourceId, items);
    this.items = items;
    this.context = context;
    inflater = (LayoutInflater)context.getLayoutInflater();

    imageLoader = new ImageLoader(context);
}

public static class ViewHolder{
    public ImageView image1;
    public ImageView image2;
}

@Override
public View getView(int position, View convertView, ViewGroup viewGroup) {
    View rowView = convertView;
    ViewHolder holder;

    if (rowView == null) {
        rowView = inflater.inflate(R.layout.list_item, null);
        holder = new ViewHolder();
        holder.image1 = (ImageView)rowView.findViewById(R.id.list_item_image1);
        holder.image2 = (ImageView)rowView.findViewById(R.id.list_item_image2);
        rowView.setTag(holder);
    }
    else 
        holder = (ViewHolder)rowView.getTag();

    imageLoader.DisplayImage("http://dev.ts.hs.kr/jjhoon713/images/1400023976194990.jpg", holder.image1);
    imageLoader.DisplayImage("http://dev.ts.hs.kr/jjhoon713/images/1400023976194990.jpg", holder.image2);
    return rowView;
}

}

Answer 1

尝试这样，

<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"

android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
>

<ImageView 
    android:id="@+id/list_item_image1"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:adjustViewBounds="true"
    android:layout_weight="1"
    android:scaleType="fitXY"
    />


<ImageView 
    android:id="@+id/list_item_image2"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:adjustViewBounds="true"
    android:layout_weight="1"
    android:scaleType="fitXY"
    />
</LinearLayout>

Answer 2

尝试使用以下代码：

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_margin="5dp"
    android:layout_width="fill_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:weightSum="2"
    >

    <ImageView
        android:id="@+id/list_item_image1"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher"
        android:scaleType="centerCrop"
        />


    <ImageView
        android:id="@+id/list_item_image2"
        android:layout_height="wrap_content"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:src="@drawable/ic_launcher"
        android:scaleType="centerCrop"
        />
</LinearLayout>

Answer 3

采用权重= 2的线性布局，并为每个图像视图分配1个权重，如下所示：

<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="wrap_content" // you can hardcode height if your view
  android:orientation="horizontal"
  android:weightSum="2">

<ImageView
    android:id="@+id/imageview1"
    android:layout_width="0dp"
    android:layout_weight="1"
    android:adjustViewBounds="true"
    android:layout_height="wrap_content" // can change to fill parent if you hardcode the height of your view
    android:src= ""// your image if static, else set dynamically
    android:scaleType="fitxy"/>


<ImageView
    android:id="@+id/imageview2"
    android:layout_height=""// can change to fill parent if you hardcode the height of your view
    android:layout_width="0dp"
    android:adjustViewBounds="true"
    android:layout_weight="1"
    android:src="wrap_content" // your image if static, else set dynamically
    android:scaleType="fitxy"/>
</LinearLayout>

Answer 4

我的问题是list_view.xml的布局宽度是换行内容。

因为列表项的父级是list_view所以权重没有用。

我将它们改为fill_parent，现在效果很好

Android系统。两个完美适合屏幕的imageViews

4 个答案: