在GridView中修复微小图像？ [英] Fixing tiny images in GridView?

问题描述

我正在尝试按照Android开发人员指南/教程实现基本的GridView库。

I'm trying to implement a basic GridView gallery as per the Android Developer Guide/Tutorial.

我的网格中的ImageViews是从用户的相机中获取的位图。

The ImageViews inside my grid are Bitmaps taken from a user's camera.

除了我的图像非常小这一事实外，这种方法很好。

This works fine except for the fact that my images are incredibly small.

我的xml：

<LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

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

</LinearLayout>

我的 ImageAdapter

public class ImageAdapter extends BaseAdapter {
    private Context mContext;
    private ArrayList<Bitmap> imgs;

    public ImageAdapter(Context c, ArrayList<Bitmap> arrayList) {
        mContext = c;
        imgs = arrayList;
    }

    public int getCount() {
        return imgs.size();
    }

    public Object getItem(int position) {
        return null;
    }

    public long getItemId(int position) {
        return 0;
    }

    // create a new ImageView for each item referenced by the Adapter
    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView;
        if (convertView == null) {
            // if it's not recycled, initialize some attributes
            imageView = new ImageView(mContext);
            imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setPadding(8, 8, 8, 8);
        } else {
            imageView = (ImageView) convertView;
        }

        imageView.setImageBitmap(imgs.get(position));
        return imageView;
    }

}

我尝试了各种各样的事情修复此问题，但唯一似乎有效的是将ImageView的布局参数调整为大量数字（例如 GridView.LayoutParams（300,300））。
然而，即使我这样做，我的图像仍然相对较小（即无处接近300dp x 300dp）。

I've tried various things to fix this issue, but the only one that seems to work is adjusting the ImageView's layout params to enormous numbers (e.g. GridView.LayoutParams(300, 300)). However, even if I do this, my images are still relatively small (i.e. nowhere near 300dp x 300dp).

知道我做错了什么？

推荐答案

将我的适配器中的布局参数设置为 GridView.LayoutParams（LayoutParams.WRAP_CONTENT，LayoutParams.WRAP_CONTENT ））设法解决问题。

Setting layout params in my adapter to GridView.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)) managed to fix the issue.

在 GridView项目太小--Android

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