android - 如何增加 GridView 中的图像大小？

Question

我有一个数组，它成功地将 15 个图像放入 GridView。然而，当在网格中显示时，图像都非常小。我该如何改变它们的大小？我尝试将 GridView.LayoutParams 更改为 (100, 100) 但似乎没有任何变化。

public View getView(int position, View convertView, ViewGroup parent) {
    ImageView imageView = new ImageView(mContext);
    imageView.setImageResource(mThumbIds[position]);
    imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
    imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
    return imageView;

Answer 1

您可以尝试根据设备或模拟器的像素密度进行调整

DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
switch(metrics.densityDpi){
     case DisplayMetrics.DENSITY_LOW:
                imageView.setLayoutParams(new GridView.LayoutParams(lowVal, lowVal));
                break;
     case DisplayMetrics.DENSITY_MEDIUM:
                imageView.setLayoutParams(new GridView.LayoutParams(medVal, medVal));
                break;
     case DisplayMetrics.DENSITY_HIGH:
                 imageView.setLayoutParams(new GridView.LayoutParams(highVal, highVal));
                 break;
}