图片适配器动态添加ImageViews到GridView的无光标 [英] Image Adapter adding ImageViews dynamically to GridView without Cursor
问题描述
我想保持短期和简单。我设置了一个ImageAdapter到一个GridView。 Unfortunatley我工作不符合标准的图像路径，但也有一些，我对我自己创建的。
下面是我的ImageAdapter - 在视图中，您将看到-imageView.setImageBitmap（extractThumbnail（BM，10，10））; - 这条线只刷新当前图像显示...我怎么能为每个画面的图像视图用类似这样的循环下，构造器查看？ - 光标不工作对我来说，我认为，他们只能用pre定义的内容处理URI的
。我会很高兴有一定的帮助。坦克提前
私有类ImageAdapter扩展了BaseAdapter {
私人语境mContext;
公共ImageAdapter（上下文C）{
mContext = C;
}
公众诠释getCount将（）{
返回1;
}
公共对象的getItem（INT位置）{
返回null;
}
众长getItemId（INT位置）{
返回0;
}
//创建由适配器引用的每个项目的新的ImageView
公共查看getView（INT位置，查看convertView，ViewGroup中父）{
ImageView的ImageView的;
如果（convertView == NULL）{//如果它不回收，初始化一些属性
ImageView的=新ImageView的（mContext）;
imageView.setLayoutParams（新GridView.LayoutParams（85，85））;
imageView.setScaleType（ImageView.ScaleType.CENTER_CROP）;
imageView.setPadding（8,8，8,8）;
} 其他 {
ImageView的=（ImageView的）convertView;
}
文件F =新的文件（IMAGE_DIRECTORY）;
文件[]文件= f.listFiles（）;
imageView.setImageURI（Uri.parse（Environment.getExternalStorageDirectory（）+/ MYDIR /））;
的for（int i = 0; I＆LT; files.length;我++）{
位图BM = BitmapFactory.de codeFILE（IMAGE_DIRECTORY +文件分割符+文件[I] .getName（））;
imageView.setImageBitmap（extractThumbnail（宽多重峰，10，10））;
}
返回ImageView的;
}
}
我有同样的问题，解决了这种方式。我希望帮助。
公共类ImageAdapter扩展了BaseAdapter {
私人语境mContext;
私人位图[] mis_fotos;
公共ImageAdapter（上下文C）{
mContext = C; }
公众诠释getCount将（）{
get_images（）;
返回mis_fotos.length;
}
公共对象的getItem（INT位置）{
返回null; }
众长getItemId（INT位置）{
返回0; }
公共查看getView（INT位置，查看convertView，ViewGroup中父）{
ImageView的ImageView的;
如果（convertView == NULL）{
ImageView的=新ImageView的（mContext）;
imageView.setLayoutParams（新GridView.LayoutParams（200，150））;
imageView.setScaleType（ImageView.ScaleType.CENTER_CROP）;
imageView.setPadding（0，0，0，0）;
} 其他 {
ImageView的=（ImageView的）convertView;
}
imageView.setImageBitmap（mis_fotos [位置]）;
返回ImageView的;
}
私人无效get_images（）{
文件目录=新的文件（Variables.PATH_FOTOS）;
文件[] archivos = directory.listFiles（）;
mis_fotos =新的位图[archivos.length]
对于（INT CONT = 0;续＆LT; archivos.length;续++）{
文件imgFile =新的文件（archivos [续]的ToString（））;
mis_fotos [续] = BitmapFactory.de codeFILE（imgFile.getAbsolutePath（））;
}
}
}
I want to keep it short and simple. I have set up an ImageAdapter to a Gridview. Unfortunatley i am working not with the standard picture paths but with some that i created on my own.
Here is my ImageAdapter - under view you will see -imageView.setImageBitmap(extractThumbnail(bm, 10, 10)); - this line only refreshes the current image view... how can i create an image view for each picture with a loop like under Contructor View? - Cursor dont work for me I think, they only can deal with the pre defined content URI's.
I would be glad for some help. Tank you in Advance
private class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return 1;
}
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;
}
File f = new File(IMAGE_DIRECTORY);
File[] files = f.listFiles();
imageView.setImageURI(Uri.parse(Environment.getExternalStorageDirectory()+"/MyDir/"));
for(int i=0; i<files.length; i++){
Bitmap bm = BitmapFactory.decodeFile(IMAGE_DIRECTORY + File.separator + files[i].getName());
imageView.setImageBitmap(extractThumbnail(bm, 10, 10));
}
return imageView;
}
}
I had the same problem and solved it this way. I hope that helps.
public class ImageAdapter extends BaseAdapter {
private Context mContext;
private Bitmap[]mis_fotos;
public ImageAdapter(Context c) {
mContext = c; }
public int getCount() {
get_images();
return mis_fotos.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 imageView;
if (convertView == null) {
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(200, 150));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(0, 0, 0, 0);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageBitmap(mis_fotos[position]);
return imageView;
}
private void get_images(){
File directory = new File(Variables.PATH_FOTOS);
File[] archivos =directory.listFiles();
mis_fotos= new Bitmap[archivos.length];
for (int cont=0; cont<archivos.length;cont++){
File imgFile = new File(archivos[cont].toString());
mis_fotos[cont] = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
}
}
}
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