Develop Reference

loading images from folder into gallery view in android

i am not able to access my folder Diary in which images are saved,
i want to display all the images from this folder into gallery,
please give some suggestion how to do it
//get the gallery view---------------------------------------------------------------------
Gallery g = (Gallery) findViewById(R.id.gallery);
g.setAdapter(new ImageAdapter(this, SDCard()));
//displaying first image on image view
Bitmap bm = BitmapFactory.decodeFile( ((List<String>) tFileList).get(0).toString());
picView.setImageBitmap(bm);
msg="first image of gallry";
showToastMessage(msg);
g.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent, View v, int position, long id)
{
Bitmap bm = BitmapFactory.decodeFile( ((List<String>) tFileList).get(position).toString());
picView.setImageBitmap(bm);
}
});
}
private List<String> SDCard()
{
tFileList = new ArrayList<String>();
try
{
File dir = Environment.getExternalStorageDirectory();
File f = new File( dir, "/Diary/");
File[] files=f.listFiles();
for(int i=0; i<files.length; i++)
{
File file = files[i];
tFileList.add(file.getPath());
}
}
catch(Exception e)
{
e.printStackTrace();
msg="Folder Not Found";
showToastMessage(msg);
}
return tFileList;
}
public class ImageAdapter extends BaseAdapter
{
int mGalleryItemBackground;
private Context mContext;
private List<String> FileList;
public ImageAdapter(Context c, List<String> fList)
{
mContext = c;
FileList = fList;
TypedArray a = obtainStyledAttributes(R.styleable.Gallery1);
mGalleryItemBackground = a.getResourceId(
R.styleable.Gallery1_android_galleryItemBackground,0);
a.recycle();
}
public int getCount()
{
return FileList.size();
}
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);
Bitmap bm = BitmapFactory.decodeFile(
FileList.get(position).toString());
i.setImageBitmap(bm);
i.setLayoutParams(new Gallery.LayoutParams(70,50));
i.setScaleType(ImageView.ScaleType.FIT_XY);
i.setBackgroundResource(mGalleryItemBackground);
return i;
}
}
what to do in this case,where i am going wrong

Unable to display the image selected in gallery view

I have an issue with showing the preview of image selected in the gallery view. I have a gallery of images from sd card, on clicking an image its preview should be shown below the gallery view(Not in seperate activity via intent). I am able to show the gallery with images but nothing is happening on clicking image.
public class NewActivity extends Activity {
GalleryBaseAdapter myGalleryBaseAdapter;
Gallery myPhotoGallery;
int[] mFiles = null;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myPhotoGallery = (Gallery)findViewById(R.id.photogallery);
myGalleryBaseAdapter = new GalleryBaseAdapter(this);
String ExternalStorageDirectoryPath = Environment.getExternalStorageDirectory().getAbsolutePath();
String path = ExternalStorageDirectoryPath;
String files;
File folder = new File (path);
final File[] listOfFiles = folder.listFiles();
for (int i = 0; i < listOfFiles.length; i++)
{
if (listOfFiles[i].isFile())
{
files = listOfFiles[i].getName();
System .out.println(files);
}
}
for (File file : listOfFiles) {
myGalleryBaseAdapter.add(file.getPath());
}
myPhotoGallery.setAdapter(myGalleryBaseAdapter);
myPhotoGallery.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView parent, View v, int position, long id) {
mFiles = new int[listOfFiles.length];
ImageView imageview = (ImageView)findViewById(R.id.imageView1);
Bitmap bitmapImage = BitmapFactory.decodeFile("/sdcard/" + mFiles[position]);
imageview.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageview.setImageBitmap(bitmapImage);
}
});
}
public class GalleryBaseAdapter extends BaseAdapter {
ArrayList<String> GalleryFileList;
Context context;
GalleryBaseAdapter(Context cont){
context = cont;
GalleryFileList = new ArrayList<String>();
}
#Override
public int getCount() {
return GalleryFileList.size();
}
#Override
public Object getItem(int position) {
return GalleryFileList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
Bitmap bm = BitmapFactory.decodeFile(GalleryFileList.get(position));
LinearLayout layout = new LinearLayout(context);
layout.setLayoutParams(new Gallery.LayoutParams(150, 150));
layout.setGravity(Gravity.CENTER);
ImageView imageView = new ImageView(context);
imageView.setLayoutParams(new Gallery.LayoutParams(200, 200));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setImageBitmap(bm);
layout.addView(imageView);
return layout;
}
public void add(String newitem){
GalleryFileList.add(newitem);
}
}
}
Can anybody please tell me what is the mistake in my code. Thanks in advance.

Wait but.... your mFiles variable in onItemClick is an array of int empty !?! You are trying to decode a path which is a concatenation between "/sdcard" and a mFiles'row, but... where are you populating that array ? I think you have to specify file path like "listOfFiles[position].getPath()"

Loading images from web into image gallery

I am using the following to code make an image gallery, but I would like to use images from the web instead of from the SD card. Is there a way to do this? Currently the code requires and integer value for the image. Or do I have to download the images to the SD first?
public class viewimages extends Activity {
private Gallery gallery;
private ImageView imgView;
private Integer[] Imgid = {
R.drawable.a_1, R.drawable.a_2, R.drawable.a_3, R.drawable.a_4
};
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.viewimages);
imgView = (ImageView)findViewById(R.id.ImageView01);
imgView.setImageResource(Imgid[0]);
gallery = (Gallery) findViewById(R.id.examplegallery);
gallery.setAdapter(new AddImgAdp(this));
gallery.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView parent, View v, int position, long id) {
imgView.setImageResource(Imgid[position]);
}
});
}
public class AddImgAdp extends BaseAdapter {
int GalItemBg;
private Context cont;
public AddImgAdp(Context c) {
cont = c;
TypedArray typArray = obtainStyledAttributes(R.styleable.GalleryTheme);
GalItemBg = typArray.getResourceId(R.styleable.GalleryTheme_android_galleryItemBackground, 0);
typArray.recycle();
}
public int getCount() {
return Imgid.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 imgView = new ImageView(cont);
imgView.setImageResource(Imgid[position]);
imgView.setLayoutParams(new Gallery.LayoutParams(80, 70));
imgView.setScaleType(ImageView.ScaleType.FIT_XY);
imgView.setBackgroundResource(GalItemBg);
return imgView;
}
}
}

You can do something like this:
URL url = new URL("http://www.website.com/image.jpg");
Bimtap bmp = BitmapFactory.decodeStream(url.openConnection()
.getInputStream());
Then you'll need to change where you're doing "setImageResource" to "setImageBitmap" and supply the 'bmp' object once it has been downloaded and loaded up.
[Edit]
It's also important to make sure your android manifest has internet permissions.
<uses-permission android:name="android.permission.INTERNET" />
[Edit for comment question]
If you want to do this for multiple images, and the images aren't based on an id_number (basically if the images aren't something like 0001.jpg, 0002.jpg, etc.) create a string ArrayList that will hold the names of all the items, and then iterate through it. E.g.,
List<String> imageNames = new ArrayList<String>();
imageNames.add("image.jpg");
imageNames.add("thisPhoto.jpg");
//etc. until you've added all images
for (int i = 0; i < imageNames.size(); i++){
URL url = new URL("http://www.website.com/" + imageNames.get(i));
Bimtap bmp = BitmapFactory.decodeStream(url.openConnection()
.getInputStream());
}
Hope that helps

Adding Bitmaps dynamically to gridview in android

I am trying to add bitmap images in gridview but continuously getting exceptions. when i try to do this in layouts it works fine. I am unable to get it. Here is the code what i am doing is:
public class SampleActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
GridView gv=(GridView)this.findViewById(R.id.gv);
Bitmap src = BitmapFactory.decodeResource(getResources(), R.drawable.logo);
for (int i=0;i<3;i++)
{
for (int j=0;j<3;j++)
{
ImageView iv= new ImageView(this);
// iv.setId(i);
Bitmap bm=Bitmap.createBitmap(src,j*(src.getWidth()/2),j*(src.getHeight()/3),src.getWidth()/3,src.getHeight()/3);
iv.setImageBitmap(bm);
gv.addView(iv);
}
}
}
Kindly Any help is welcome :))

for adding data in Gridview, you have to set adapter
gridview.setAdapter(adapter);
see example http://developer.android.com/guide/tutorials/views/hello-gridview.html

Here is an idea. You can create a ImageAdapter and add a SetImages function. Then you add your ImageAdapter to the GridView, prepare the images and set the through the ImageAdapter.
For sample:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.grid);
GridView gridview=(GridView)this.findViewById(R.id.gridView);
Integer[] mThumbIds = {
R.drawable.logo, R.drawable.logo, R.drawable.logo,
R.drawable.logo, R.drawable.logo, R.drawable.logo,
R.drawable.logo, R.drawable.logo, R.drawable.logo,
R.drawable.logo, R.drawable.logo, R.drawable.logo
};
ImageAdapter myAdapter = new ImageAdapter(this);
myAdapter.SetImages(mThumbIds);
gridview.setAdapter(myAdapter);
}
public class ImageAdapter extends BaseAdapter {
private Context mContext;
private Integer[] pics;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return pics.length;
}
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);
//You can set some params here
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(pics[position]);
return imageView;
}
public void SetImages(Integer[] id){
pics = id.clone();
}
}
I don't know if this is the right approach but it works :D

public class ImageAdapter extends BaseAdapter
{
private Context context;
private List<String> path_images = new ArrayList<String>();
public ImageAdapter( Context context, List<String> path_images ){ this.context = context; this.path_images = path_images; }
#Override public int getCount ( ){ return images.size(); }
#Override public Object getItem (int i){ return BitmapFactory.decodeFile( path_images.get(i) ); }
#Override public long getItemId(int i){ return 0; }
#Override public View getView(int i, View convertView, ViewGroup parent)
{
ImageView imageView = new ImageView( context );
imageView.setImageBitmap( BitmapFactory.decodeFile( paht_images.get(i) ) );
imageView.setScaleType( ImageView.ScaleType.CENTER_CROP );
imageView.setLayoutParams(new GridView.LayoutParams( 145, 145 ));
return imageView;
}
}
private void present_all_images()
{
final String FS = File.separator;
final String directory = Environment.getExternalStorageDirectory().toString() + FS + "directory";
List<String> path_images = new ArrayList<String>();
path_images.add( directory + FS + "image01.png" );
path_images.add( directory + FS + "image02.png" );
path_images.add( directory + FS + "image03.png" );
grid_data = (GridView)findViewById(R.id.gallery_grid_data);
grid_data.setAdapter( new ImageAdapter( this, path_images ) );
grid_data.setOnItemClickListener(new OnItemClickListener(){ public void onItemClick(AdapterView<?> parent, View v, int position, long id)
{
}});
}

Try to get all image from sdcard to show in gallery view

I'm trying to get all of the image that stored in sdcard to show in a gallery view by the code below. But when I use ImageFilter nothing shows up, just a blank screen without any error. Any suggestion?
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;
}
}
}

I would suggest that u make use of MediaStore . Also check for permissions in ur manifest file

Did you check that File images = new File("/sdcard/"); is returning the actual sdcard root folder? Try using File images = Environment.getExternalStorageDirectory(); instead.
Also, add a line Log.d ("Galmix", mFiles[i]); after mFiles[i] = imagelist[i].getAbsolutePath(); so you know if you are getting the file list or not.
Also, try
return (name.toUpperCase().endsWith(".JPG"));

This might be helpful:
Drawable mImage;
// you can use loop over here
mImage = Drawable.createFromPath("pathName");
//create one Imageview & set its resource mImage