Develop Reference

Gridview of image from sdcard directory

I want show image in gridview from sdcard directory.i use this code.But when i load image by type : bitmap.getView in gridview adapter need Integer[] array.how i can fix it?
public class LoadPic extends Activity {
Integer[] imageIDs = {
R.drawable.user,
R.drawable.user,
R.drawable.user,
R.drawable.user,
R.drawable.user,
R.drawable.user,
R.drawable.user
};
int numberOfImages=0;
Bitmap[] m;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.load_pic);
Intent gett = getIntent();
String _area = gett.getStringExtra("area");
String _domain = gett.getStringExtra("domain");
String _block = gett.getStringExtra("block");
String _melk = gett.getStringExtra("melk");
String _build = gett.getStringExtra("build");
String _apar = gett.getStringExtra("apar");
String _senfi = gett.getStringExtra("senfi");
File dir = new File(Environment.getExternalStorageDirectory()
+ "/momayezi/"+_area+"-"+_domain+"-"+_block+"-"+_melk+"-"+_build+"-"+_apar+"-"+_senfi);
File[] files = dir.listFiles();
numberOfImages=files.length;
for (int i=1;i<=numberOfImages;i++)
{
File img = new File("/sdcard/momayezi/"+_area+"-"+_domain+"-"+_block+"-"+_melk+"-"+_build+"-"+_apar+"-"+_senfi+"/pic"+i+".png");
if(img.exists())
{
Bitmap bit = BitmapFactory.decodeFile(img.getAbsolutePath());
}
}
GridView gridView = (GridView) findViewById(R.id.gridview);
gridView.setAdapter(new ImageAdapter(this));
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent,
View v, int position, long id) {
Toast.makeText(getBaseContext(),
"pic" + (position + 1) + " selected",
Toast.LENGTH_SHORT).show();
}
});
}
public class ImageAdapter extends BaseAdapter
{
private Context context;
public ImageAdapter(Context c)
{
context = c;
}
//---returns the number of images---
public int getCount() {
return numberOfImages;
}
//---returns the ID of an item---
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
//---returns an ImageView view---
public View getView(int position, View convertView, ViewGroup parent)
{
ImageView imageView;
if (convertView == null) {
imageView = new ImageView(context);
imageView.setLayoutParams(new GridView.LayoutParams(185, 185));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(7, 7, 7, 7);
} else {
imageView = (ImageView) convertView;
}
/**/
imageView.setImageResource(imageIDs[position]);
/**/
return imageView;
}
}
}
please help how i can use image in this class(adapter).

If you want to show images from sdcard into your grid view use any imageloader library
Universal Image Loader
https://github.com/nostra13/Android-Universal-Image-Loader
then you need to create a string array or a model class instead of that integer array.
Please refer the below tutorials.
http://wptrafficanalyzer.in/blog/loading-thumbnail-images-in-a-gridview-and-opening-original-images-in-alertdialog-using-media-content-providers/

replace
public int getCount() {
return numberOfImages;
}
with
public int getCount() {
return imageIDs.length();
}

First properly explain what do want to set Drawable or Bitmap?
If Bitmap then this is how you should set bitmap(make a list of bitmaps and then):
imageView.setImageBitmap(bitmaps[position]);
if Drawable then(make list of drawable id's)
imageview.setImageResource(drawables[position]);
This is how make bitmap list:
ArrayList<Bitmap> bitmaps = new ArrayList<Bitmap>();
File dir = new File(Environment.getExternalStorageDirectory()
+ "/momayezi/"+_area+"-"+_domain+"-"+_block+"-"+_melk+"-"+_build+"-"+_apar+"-"+_senfi);
File[] files = dir.listFiles();
numberOfImages=files.length;
for (int i=1;i<=numberOfImages;i++)
{
File f = new File("/sdcard/momayezi/"+_area+"-"+_domain+"-"+_block+"-"+_melk+"-"+_build+"-"+_apar+"-"+_senfi+"/pic"+i+".png");
Bitmap bmp = BitmapFactory.decodeFile(f.getAbsolutePath());
if(bmp!=null){
bitmaps.add(bmp);
}
}

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()"

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

Application that contains gallery with images from sd card crashes onOrientation changed

i have the folowing custom adapter for a Gallery widget. everything works great except when i change screen orientation, the app crashes due to
12-03 12:45:48.897: ERROR/AndroidRuntime(3594): java.lang.OutOfMemoryError: bitmap size exceeds VM budget
i know that the maximum VM budget is 16 mb. but how did i pass it? is there a way to clear the memory that is not used or on orientation change? i know there is a recycle method for bitmaps but how do i use it in my case?
public class ImageAdapter extends BaseAdapter {
int mGalleryItemBackground;
private Context mContext;
private Uri[] mUrls;
String[] mFiles=null;
public ImageAdapter(Context c) {
mContext = c;
readImagesFromSd();
TypedArray a = c.obtainStyledAttributes(R.styleable.Gallery1);
mGalleryItemBackground = a.getResourceId(
R.styleable.Gallery1_android_galleryItemBackground, 0);
a.recycle();
}
public void readImagesFromSd(){
File images = new File(Environment.getExternalStorageDirectory().toString()+CameraView.FOLDER+"/");
images.mkdirs();
File[] imagelist = images.listFiles();
//Toast.makeText(mContext, String.valueOf(imagelist.length), Toast.LENGTH_LONG).show();
/*new FilenameFilter() {
#Override
public boolean accept(File dir, String name) {
return ((name.endsWith(".jpg")) || (name.endsWith(".png")));
}
});*/
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]);
}
}
public int getCount() {
// return mImageIds.length;
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.setImageResource(mImageIds[position]);
i.setImageURI(mUrls[position]);
i.setLayoutParams(new Gallery.LayoutParams(150, 100));
i.setScaleType(ImageView.ScaleType.FIT_XY);
i.setBackgroundResource(mGalleryItemBackground);
return i;
}
}