某些设备上的 ImageView 黑色背景

Question

我有一个包含图像（每行）的 ListView，每个图像的宽度为 match_parent，高度约为宽度的 0.4。

现在一切正常，除了在大屏幕设备上（如 nexus 7...），而不是我看到的黑色背景图像

这是我的 ListView 适配器

public class Adapter extends ArrayAdapter<String>{
    int width = 0;

    private final Activity context;
    private final String[] title;
    private final int[] img;

    public PlansAdapter(Activity context,
                        String[] title, int[] img) {
        super(context, R.layout.listsingle, title);
        this.context = context;
        this.title = title;
        this.img = img;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = context.getLayoutInflater();
        convertView = inflater.inflate(R.layout.listsingle, null, true);
        TextView Title = (TextView) convertView.findViewById(R.id.text);
        Title.setText(title[position]);
        ImageView Img = (ImageView) convertView.findViewById(R.id.img);
        Img.setImageResource(img[position]);
        width = ((Activity) getContext()).getWindowManager().getDefaultDisplay().getWidth();
        double a = (double) 44/96;

        Img.getLayoutParams().height = (int) (a*width);

        RelativeLayout bghover = (RelativeLayout )convertView.findViewById(R.id.bghover);
        bghover.getLayoutParams().height = (int) (a*width);


        return convertView;
    }
}

在接下来的activity中，我使用相同的代码并看到了图像。

width = getWindowManager().getDefaultDisplay().getWidth();
double a = (double) 44/96;
Img.getLayoutParams().height = (int) (a*width);

我认为设备内存不够大，无法显示所有图像

这是logcat

eglSurfaceAttrib not implemented

Dropping event due to no window focus: KeyEvent { action=ACTION_DOWN, keyCode=KEYCODE_ALT_RIGHT, scanCode=100, metaState=META_ALT_ON|META_ALT_RIGHT_ON, flags=0x8, repeatCount=497, eventTime=242910, downTime=216396, deviceId=1, source=0x301 }

Dropping event due to no window focus: KeyEvent { action=ACTION_DOWN, keyCode=KEYCODE_ALT_RIGHT, scanCode=100, metaState=META_ALT_ON|META_ALT_RIGHT_ON, flags=0x8, repeatCount=498, eventTime=242960, downTime=216396, deviceId=1, source=0x301 }

GC_FOR_ALLOC freed 1461K, 8% free 18275K/19844K, paused 6ms, total 6ms

Answer 1

我认为设备内存不足或类似问题。我已经让照片在后台加载，现在一切正常。

某些设备上的 ImageView 黑色背景

ImageView black background on some devices

android

listview

imageview