我試圖通過下面的代碼獲取存儲在SD卡中的所有圖像以顯示在圖庫視圖中。但是當我使用ImageFilter時什麼也沒有顯示,只是一個沒有任何錯誤的空白屏幕。任何建議?嘗試從SD卡中獲取所有圖像以顯示在圖庫視圖
public class Galmix extends Activity {
/** Called when the activity is first created. */
private Gallery g;
private ImageView imv;
private Uri[] mUrls;
String[] mFiles=null;
class ImageFilter implements FilenameFilter
{
public boolean accept(File dir, String name)
{
return (name.endsWith(".JPG"));
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
File images = new File("/sdcard/");
File[] imagelist = images.listFiles(new ImageFilter());
// File[] imagelist = images.listFiles();
// File[] imagelist = images.listFiles(new FilenameFilter(){
// @Override
// public boolean accept(File dir, String name){
// return ((name.endsWith(".JPG")));
// }
// });
// File images = new File(Environment.getExternalStorageDirectory().toString());
// images.mkdirs();
// File[] imagelist = images.listFiles();
mFiles = new String[imagelist.length];
for(int i= 0 ; i< imagelist.length; i++){
mFiles[i] = imagelist[i].getAbsolutePath();
}
mUrls = new Uri[mFiles.length];
for(int i=0; i < mFiles.length; i++){
mUrls[i] = Uri.parse(mFiles[i]);
}
// i = (ImageView)findViewById(R.id.ImageView01);
// i.setImageResource(mImageIds[0]);
g = (Gallery) findViewById(R.id.gallery);
g.setAdapter(new ImageAdapter(this));
g.setFadingEdgeLength(40);
// g.setOnItemClickListener(new OnItemClickListener() {
// public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
// imv.setImageURI(mUrls[position]);
// }
// });
}
public class ImageAdapter extends BaseAdapter {
int mGalleryItemBackground;
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
TypedArray a = obtainStyledAttributes(R.styleable.HelloGallery);
mGalleryItemBackground = a.getResourceId(R.styleable.HelloGallery_android_galleryItemBackground, 0);
a.recycle();
}
public int getCount() {
return mUrls.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView i = new ImageView(mContext);
i.setImageURI(mUrls[position]);
i.setLayoutParams(new Gallery.LayoutParams(150, 100));
i.setScaleType(ImageView.ScaleType.FIT_XY);
i.setBackgroundResource(mGalleryItemBackground);
return i;
}
}
}
沒有發生時,我添加登錄,甚至我改文件中的圖像= Environment.getExternalStorageDirectory()來了; 但是當我沒有使用過濾器像File [] imagelist = images.listFiles();我的應用程序將顯示一個包含圖像的圖庫的空白框。 而另一個是我只關注一個文件夾,如文件圖像=新文件(「/ sdcard/TestPics」);它恰好在圖庫視圖中顯示圖像。 你有什麼建議嗎? 非常感謝。 – 2011-04-25 06:31:25
@Lumluk也許你有混合的圖像與小寫和大寫擴展?嘗試上面的添加。 – Aleadam 2011-04-25 15:48:30