Gridview无法在较低版本的android中正确显示图像

Question

我正在尝试在运行时从assets文件夹加载图像后在网格视图中显示图像。目录中的所有图像具有不同的尺寸和大小。在Android 2.3的较低版本中，图像无法正确呈现。在运行较旧Android版本的设备中，图像重叠，大图像被裁剪。我尝试过给出不同的布局参数，但它仍然不起作用。在较新版本的android中，如kitkat（4.4）和棒棒糖（5.0），图像显示完美。有什么问题？这是我的代码。

newselectframe.java     public class newselectframe扩展了Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_newselectframe);
    View header = findViewById(R.id.textView);
    header.setVisibility(View.VISIBLE);

    final GridView gridView = ((GridView)(findViewById(R.id.layout1)));
    Context context = getApplicationContext();
    gridView.setAdapter(new ImageAdapter(this));

}

ImageAdapter.java

public class ImageAdapter extends BaseAdapter {
private Context context;
private String[] list;

public ImageAdapter(Context c) {
    context = c;
    try {
        list = context.getAssets().list("frames");

    } catch (IOException e) {
        e.printStackTrace();
    }
}

public int getCount() {
    return list.length;
}

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

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

public View getView(int position, View convertView, ViewGroup parent) {
    ImageView img;

    if (convertView == null) {

        img = new ImageView(context);
        LinearLayout.LayoutParams params = new      LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,   ViewGroup.LayoutParams.WRAP_CONTENT);
        img.setLayoutParams(new GridView.LayoutParams(params));
        img.setScaleType(ImageView.ScaleType.CENTER);
        img.setPadding(8, 8, 8, 8);

    } else {

        img = (ImageView) convertView;
    }
    try {

        InputStream ims = context.getAssets().open("frames/" + list[position]);

        //Drawable d = Drawable.createFromStream(ims, null);
        Bitmap bitmap = BitmapFactory.decodeStream(ims);
        img.setImageBitmap(bitmap);

    } catch (IOException e) {
        e.printStackTrace();
    }
    return img;
}

}