0

我的应用程序中有一个 GridView，它在几乎所有设备上都非常棒，但是......我给一些朋友测试，他们说我的应用程序在 GridView 上崩溃了。. 应用程序崩溃或者他们真的必须滚动它小心。有朋友说GridView还可以（还有我的——HTC Wildfire、三星Galaxy Mini），但是我有三星Galaxy S3、S4的朋友却说它崩溃了。我的网格视图：

public static List<Item> items = new ArrayList<Item>();

...

GridView gridView = (GridView) findViewById(R.id.gridview);
        items.clear();
//add all items to list

    gridView.setAdapter(new ImageAdapter(this, items));
            gridView.setOnItemClickListener(new OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> parent, View v,
                        int position, long id) {
                    Intent i = new Intent(getApplicationContext(), SecondActivity.class);
                    i.putExtra("id", position);
                    startActivity(i);

                }
            });

图像适配器：

public class ImageAdapter extends BaseAdapter {

    private List<Item> items = new ArrayList<Item>();
    private LayoutInflater inflater;

    public ImageAdapter(Context context, List<Item> items) {
        inflater = LayoutInflater.from(context);
        this.items = items;
    }

    @Override
    public int getCount() {
        return items.size();
    }

    @Override
    public Object getItem(int i) {
        return items.get(i);
    }

    @Override
    public long getItemId(int i) {
        return items.get(i).drawable;
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        View v = view;
        ImageView picture;
        TextView name;

        if (v == null) {
            v = inflater.inflate(R.layout.squareimageview, viewGroup, false);
            v.setTag(R.id.picture, v.findViewById(R.id.picture));
            v.setTag(R.id.text, v.findViewById(R.id.text));
        }

        picture = (ImageView) v.getTag(R.id.picture);
        name = (TextView) v.getTag(R.id.text);

        Item item = (Item) items.get(i);

        picture.setImageResource(item.getDrawable());
        name.setText(item.name);

        return v;

    }

}

我的 SquareImageView 类，它将我的 GridView 的元素大小设置为 2 列并在多个屏幕上看起来不错：

public class SquareImageView extends ImageView {
    public SquareImageView(Context context) {
        super(context);
    }

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

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

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        setMeasuredDimension(getMeasuredWidth(), getMeasuredWidth()); //Snap to width
    }

}
4

1 回答 1

2

来自setImageResource()的文档。（强调是我的）

这会在UI 线程上进行位图读取和解码，这可能会导致延迟中断。如果这是一个问题，请考虑改用 setImageDrawable(android.graphics.drawable.Drawable) 或 setImageBitmap(android.graphics.Bitmap) 和 BitmapFactory。

我强烈建议您使用Picasso库来显示图像。将库添加到项目后，调用以下函数getView()：

Picasso.with(context).load(item.getDrawable()).into(picture);

就是这样。

public class ImageAdapter extends BaseAdapter {

    private List<Item> items = new ArrayList<Item>();
    private LayoutInflater inflater;

    private Context context; 

    public ImageAdapter(Context context, List<Item> items) {
        inflater = LayoutInflater.from(context);
        this.items = items;
        this.context = context;
    }
    .
    .
    .
    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        View v = view;
        ImageView picture;
        TextView name;

        if (v == null) {
            v = inflater.inflate(R.layout.squareimageview, viewGroup, false);
            v.setTag(R.id.picture, v.findViewById(R.id.picture));
            v.setTag(R.id.text, v.findViewById(R.id.text));
        }

        picture = (ImageView) v.getTag(R.id.picture);
        name = (TextView) v.getTag(R.id.text);

        Item item = (Item) items.get(i);

        Picasso.with(context).load(item.getDrawable()).into(picture);
        name.setText(item.name);

        return v; 
    }
}
于 2013-12-02T15:53:11.617 回答