android - 图像裁剪以适合 GridView

Question

我需要在 GridView 中显示三列 ImageView 并且我想对图像进行平方以避免这种影响https://www.dropbox.com/s/hjc55ijbf8cdkao/SC20130430-194230.png

这是我的 xml 代码：

<?xml version="1.0" encoding="utf-8"?>

<GridView 
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/grid_view"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:numColumns="3"
  android:columnWidth="90dp"
  android:horizontalSpacing="10dp"
  android:verticalSpacing="10dp"
  android:gravity="center"
  android:stretchMode="columnWidth" >  

</GridView>

和适配器：

public class PhotoListAdapter extends ArrayAdapter<Photo> {

Context context;

// Constructor
public PhotoListAdapter(Context context, ArrayList<Photo> mPhotoList) {
    super(context, R.layout.item_album_detail, mPhotoList);
    this.context = context;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    // Inflating
    LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    convertView = inflater.inflate(R.layout.item_album_detail, parent, false);

    // Linking view by id
    ImageView pic = (ImageView) convertView.findViewById(R.id.current_img);

    // Get current item
    Photo item = getItem(position);

    // Set widget
    pic.setScaleType(ImageView.ScaleType.CENTER_CROP);
    ImageDownloader imgd = new ImageDownloader(pic);
    imgd.execute(item.getPhoto_m());

    return convertView;
}

}

在 item_album_detail.xml 中只有一个 ImageView

<ImageView
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:contentDescription="@string/desc"
  android:id="@+id/current_img"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:adjustViewBounds="true" />

我希望得到这个https://www.dropbox.com/s/i5gimy1lcwyavui/SC20130430-195710.png

Answer 1

更改比例类型将解决您的问题。但图像可能看起来很拉伸。

pic.setScaleType(ImageView.ScaleType.FIT_XY);

Answer 2

您可以尝试以编程方式更改相对布局中图像视图的大小。我必须这样做才能获得瓷砖（相同尺寸）

    DisplayMetrics displaymetrics = new DisplayMetrics();
    mActivity.getWindowManager().getDefaultDisplay()
            .getMetrics(displaymetrics);
    int height = displaymetrics.heightPixels / 2
            - (int) convertDpToPixel(1);
    int width = displaymetrics.widthPixels / 2 - (int) convertDpToPixel(1);

    iv1.setLayoutParams(new RelativeLayout.LayoutParams(width,
            height));
    iv2.setLayoutParams(new RelativeLayout.LayoutParams(width,
            height));
    iv3.setLayoutParams(new RelativeLayout.LayoutParams(width,
            height));
    iv4.setLayoutParams(new RelativeLayout.LayoutParams(width,
            height));