Develop Reference

captured image quality is low in gridview

I am creating an android app in which the user can click the images which would be shown in grid view once the image is captured this part works fine but the quality of the image is very low and even if i take the image from the high resolution camera it shows the width and height of the image as 160 and 200 px respectively.
I would like to know is there any way to capture the image in original size than compress the image what we do in whatsapp. since i am a newbie to android i don't know what i have to do.
public class CamAct extends Activity implements OnClickListener {
Button captureBtn = null;
final int CAMERA_CAPTURE = 1;
private Uri picUri;
private DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
private GridView grid;
private List<String> listOfImagesPath;
public static final String GridViewDemo_ImagePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/GridViewDemo/";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.camlayout);
captureBtn = (Button)findViewById(R.id.capture_btn1);
captureBtn.setOnClickListener(this);
grid = ( GridView) findViewById(R.id.gridviewimg);
listOfImagesPath = null;
listOfImagesPath = RetriveCapturedImagePath();
if(listOfImagesPath!=null){
grid.setAdapter(new ImageListAdapter(this,listOfImagesPath));
}
}
#Override
public void onClick(View arg0) {
if (arg0.getId() == R.id.capture_btn1) {
try {
Intent captureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(captureIntent, CAMERA_CAPTURE);
} catch(ActivityNotFoundException anfe){
String errorMessage = "Whoops - your device doesn't support capturing images!";
Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
toast.show();
}
}
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if(requestCode == CAMERA_CAPTURE){
Bundle extras = data.getExtras();
Bitmap thePic = extras.getParcelable("data");
String imgcurTime = dateFormat.format(new Date());
File imageDirectory = new File(GridViewDemo_ImagePath);
imageDirectory.mkdirs();
String _path = GridViewDemo_ImagePath + imgcurTime+".jpg";
try {
FileOutputStream out = new FileOutputStream(_path);
thePic.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.close();
} catch (FileNotFoundException e) {
e.getMessage();
} catch (IOException e) {
e.printStackTrace();
}
listOfImagesPath = null;
listOfImagesPath = RetriveCapturedImagePath();
if(listOfImagesPath!=null){
grid.setAdapter(new ImageListAdapter(this,listOfImagesPath));
}
}
}
}
private List<String> RetriveCapturedImagePath() {
List<String> tFileList = new ArrayList<String>();
File f = new File(GridViewDemo_ImagePath);
if (f.exists()) {
File[] files=f.listFiles();
Arrays.sort(files);
for(int i=0; i<files.length; i++){
File file = files[i];
if(file.isDirectory())
continue;
tFileList.add(file.getPath());
}
}
return tFileList;
}
ImageAdapter:
public class ImageListAdapter extends BaseAdapter
{
private Context context;
private List<String> imgPic;
public ImageListAdapter(Context c, List<String> thePic)
{
context = c;
imgPic = thePic;
}
public int getCount() {
if(imgPic != null)
return imgPic.size();
else
return 0;
}
//---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;
BitmapFactory.Options bfOptions=new BitmapFactory.Options();
bfOptions.inDither=false; //Disable Dithering mode
bfOptions.inPurgeable=true; //Tell to gc that whether it needs free memory, the Bitmap can be cleared
bfOptions.inInputShareable=true; //Which kind of reference will be used to recover the Bitmap data after being clear, when it will be used in the future
bfOptions.inTempStorage=new byte[16 * 1024];
if (convertView == null) {
imageView = new ImageView(context);
imageView.setLayoutParams(new GridView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
imageView.setPadding(0, 0, 0, 0);
} else {
imageView = (ImageView) convertView;
}
FileInputStream fs = null;
Bitmap bm;
try {
fs = new FileInputStream(new File(imgPic.get(position).toString()));
if(fs!=null) {
bm=BitmapFactory.decodeFileDescriptor(fs.getFD(), null, bfOptions);
imageView.setImageBitmap(bm);
imageView.setId(position);
imageView.setLayoutParams(new GridView.LayoutParams(200, 160));
}
} catch (IOException e) {
e.printStackTrace();
} finally{
if(fs!=null) {
try {
fs.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return imageView;
}
}

Try this:
captureBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if(subname.getText().toString().isEmpty()){
Snackbar.make(view, "Select Subject", Snackbar.LENGTH_LONG).show();
}else {
Intent intent = new Intent(
android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
ImagefileUri = Uri.fromFile(getFile());
intent.putExtra(MediaStore.EXTRA_OUTPUT, ImagefileUri);
startActivityForResult(intent, CAMERA_PIC_REQUEST);
}
}
});
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if(requestCode == CAMERA_PIC_REQUEST){
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int dw = size.x;
int dh = size.y;
// Load up the image's dimensions not the image itself
BitmapFactory.Options bmpFactoryOptions = new BitmapFactory.Options();
bmpFactoryOptions.inJustDecodeBounds = true;
Bitmap bmp = BitmapFactory.decodeFile(ImagefileUri.getPath(),
bmpFactoryOptions);
int heightRatio = (int) Math.ceil(bmpFactoryOptions.outHeight
/ (float) dh);
int widthRatio = (int) Math.ceil(bmpFactoryOptions.outWidth
/ (float) dw);
Log.v("HEIGHTRATIO", "" + heightRatio);
Log.v("WIDTHRATIO", "" + widthRatio);
if (heightRatio > 1 && widthRatio > 1) {
if (heightRatio > widthRatio) {
// Height ratio is larger, scale according to it
bmpFactoryOptions.inSampleSize = heightRatio;
} else {
// Width ratio is larger, scale according to it
bmpFactoryOptions.inSampleSize = widthRatio;
}
}
// Decode it for real
bmpFactoryOptions.inJustDecodeBounds = false;
bmp = BitmapFactory.decodeFile(ImagefileUri.getPath(),
bmpFactoryOptions);
InitilizeGridLayout();
// loading all image paths from SD card
imagePaths = utils.getFilePaths();
// Gridview adapter
adapter = new GridViewImageAdapter(Cam.this, imagePaths,
columnWidth);
// setting grid view adapter
gridView.setAdapter(adapter);
}
}else if (resultCode == RESULT_CANCELED) {
// user cancelled Image capture
Toast.makeText(getApplicationContext(),
"User cancelled image capture", Toast.LENGTH_SHORT).show();
} else {
// failed to capture image
Toast.makeText(getApplicationContext(),
"Sorry! Failed to capture image", Toast.LENGTH_SHORT)
.show();
}
}
It will capture the image as per the camera width and height so you will get the image in good quality as well as the image adapter you are using has an temp storage which can store only 5 or 6 images of high quality so change the grid view .To know more about displaying images from sdcard to gridview use the following link: Loading images from sdcard and display it in gridview
Hope this code helps you:)

share listview item (url image and text ) on facebook

I am fetching data from server and set it into listview. Each Listview item have photo ( url image ) and a text + share button . I have implemented all the code and working perfect.. But can any one help me.. How to implement facebook share intent when click on button of particular listview item.I want to share image and text
i ask from a way to the this
and thank you in advance

this is my code "MediaAdapter.java" :
public class MediaAdapter extends ArrayAdapter<Media> {
ArrayList<Media> mediaList;
Context context;
int Resource;
LayoutInflater vi;
ViewHolder holder;
ImageLoader imageLoader;
public MediaAdapter(Context context, int resource, ArrayList<Media> objects) {
super(context, resource, objects);
imageLoader = new ImageLoader(context);
vi = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
Resource = resource;
mediaList = objects;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
// convert view = design
View v = convertView;
v = vi.inflate(Resource, null);
holder = new ViewHolder();
int loader = R.drawable.ic_launcher;
//l url d image
holder.imageview = (ImageView) v.findViewById(R.id.urlImage);
// load image
imageLoader.DisplayImage(mediaList.get(position).getUrl(), loader, holder.imageview );
holder.titre = (TextView) v.findViewById(R.id.titre);
holder.titre.setText(mediaList.get(position).getTitre());
v.setTag(holder);
holder.button = (Button) v.findViewById(R.id.btnOne);
holder.button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//Toast.makeText(v.getContext(), "test",Toast.LENGTH_SHORT).show();
}
});
return v;
}
static class ViewHolder {
public ImageView imageview;
public TextView titre;
public Button button;
}
}

Change this in the code ....
First remove this line from the constructor
imageLoader = new ImageLoader(context);
Change it to
ImageLoader imageLoader = ImageLoader.getInstance();
Secondly remove this line from the code :
imageLoader.DisplayImage(mediaList.get(position).getUrl(), loader, holder.imageview );
Change it to
imageLoader.loadImage(mediaList.get(position).getUrl(), new SimpleImageLoadingListener() {
#Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
holder.button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent shareIntent = new Intent(Intent.ACTION_SEND);
shareIntent.setType("text/plain");
shareIntent.putExtra(Intent.EXTRA_TEXT,mediaList.get(position).getTitre());
shareIntent.setType("image/*");
shareIntent.putExtra(Intent.EXTRA_STREAM, getImageUri(context,loadedImage));
try {
context.startActivity(shareIntent);
} catch (Exception ex) {
Toast.makeText(context, ex.getMessage(),Toast.LENGTH_LONG).show();
}
}
});
}
});
Use this method to transform bitmap to uri:
public Uri getImageUri(Context inContext, Bitmap inImage) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
String path = Images.Media.insertImage(inContext.getContentResolver(),inImage, "Title", null);
return Uri.parse(path);
}
This will open the the share option for sharing to all the other apps including facebook. If facebook is selected by the user,then the image will be opened in the facebook app (if installed).Let me know if it working for you or not.

this is my new coode
it work like a charm
but i have a problem : but i have a problem when i click on share button of the item Number 2 ===== the content of the item number 3 is shared and note the Number 2 and vice-versa ????????????????
holder.button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Uri pictureUri = getLocalBitmapUri(holder.imageview);
if (pictureUri != null) {
// Construct a ShareIntent with link to image
String text = "image : "+mediaList.get(position).getTitre();
Intent shareIntent = new Intent();
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.putExtra(Intent.EXTRA_TEXT, text);
shareIntent.putExtra(Intent.EXTRA_STREAM, pictureUri);
shareIntent.setType("image/*");
// Launch sharing dialog for image
shareIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(shareIntent);
} else {
// ...sharing failed, handle error
}
///////////////////////////////////////////////////////////
private Uri getLocalBitmapUri(ImageView imageview) {
// TODO Auto-generated method stub
// Extract Bitmap from ImageView drawable
Drawable drawable =holder.imageview.getDrawable();
Bitmap bmp = null;
if (drawable instanceof BitmapDrawable){
bmp = ((BitmapDrawable) holder.imageview.getDrawable()).getBitmap();
} else {
return null;
}
// Store image to default external storage directory
Uri bmpUri = null;
try {
File file = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_DOWNLOADS), "share_image_" + System.currentTimeMillis() + ".png");
file.getParentFile().mkdirs();
FileOutputStream out = new FileOutputStream(file);
bmp.compress(Bitmap.CompressFormat.PNG, 90, out);
out.close();
bmpUri = Uri.fromFile(file);
} catch (IOException e) {
e.printStackTrace();
}
return bmpUri;
}

OnClick goto new Activity in GridView Android

I take a photo from the camera and store them in a GridView, now when i view them there is no OnClick function to Enlarge or Goto new Activity to Enlarge the selected image, Here's the code:
Where to implement the OnClick method to take the selected image to a new Activity and enlarge it
package com.example.veeresh.myphotogallery;
public class Photo_1 extends AppCompatActivity implements OnClickListener {
Button captureBtn = null;
final int CAMERA_CAPTURE = 1;
private Uri picUri;
private DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
private GridView grid;
private List<String> listOfImagesPath;
private String path;
private String pathMusic;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_photo);
int pos = 0;
path = " ";
pathMusic = getIntent().getStringExtra("Store to Music");
if(pathMusic != null)
{
path = pathMusic;
}
captureBtn = (Button) findViewById(R.id.capture_btn1);
captureBtn.setOnClickListener(this);
grid = (GridView) findViewById(R.id.gridviewimg);
listOfImagesPath = null;
listOfImagesPath = RetriveCapturedImagePath();
if (listOfImagesPath != null) {
grid.setAdapter(new ImageListAdapter(this, listOfImagesPath));
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if (arg0.getId() == R.id.capture_btn1) {
try {
//use standard intent to capture an image
Intent captureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
//we will handle the returned data in onActivityResult
Toast.makeText(this, "Launching Camera", Toast.LENGTH_SHORT).show();
startActivityForResult(captureIntent, CAMERA_CAPTURE);
} catch (ActivityNotFoundException anfe) {
//display an error message
String errorMessage = "Whoops - your device doesn't support capturing images!";
Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
toast.show();
}
}
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
//user is returning from capturing an image using the camera
if (requestCode == CAMERA_CAPTURE) {
Bundle extras = data.getExtras();
Bitmap thePic = extras.getParcelable("data");
String imgcurTime = dateFormat.format(new Date());
File imageDirectory = new File(path);
imageDirectory.mkdirs();
String _path = path + imgcurTime + ".jpg";
try {
FileOutputStream out = new FileOutputStream(_path);
thePic.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.close();
} catch (FileNotFoundException e) {
e.getMessage();
} catch (IOException e) {
e.printStackTrace();
}
listOfImagesPath = null;
listOfImagesPath = RetriveCapturedImagePath();
if (listOfImagesPath != null) {
grid.setAdapter(new ImageListAdapter(this, listOfImagesPath));
}
}
}
}
private List<String> RetriveCapturedImagePath() {
List<String> tFileList = new ArrayList<String>();
File f = new File(path);
if (f.exists()) {
File[] files = f.listFiles();
Arrays.sort(files);
for (int i = 0; i < files.length; i++) {
File file = files[i];
if (file.isDirectory())
continue;
tFileList.add(file.getPath());
}
}
return tFileList;
}
public class ImageListAdapter extends BaseAdapter {
private Context context;
private List<String> imgPic;
public ImageListAdapter(Context c, List<String> thePic) {
context = c;
imgPic = thePic;
}
public int getCount() {
if (imgPic != null)
return imgPic.size();
else
return 0;
}
//---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;
BitmapFactory.Options bfOptions = new BitmapFactory.Options();
bfOptions.inDither = false; //Disable Dithering mode
bfOptions.inPurgeable = true; //Tell to gc that whether it needs free memory, the Bitmap can be cleared
bfOptions.inInputShareable = true; //Which kind of reference will be used to recover the Bitmap data after being clear, when it will be used in the future
bfOptions.inTempStorage = new byte[32 * 1024];
if (convertView == null) {
imageView = new ImageView(context);
imageView.setLayoutParams(new GridView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
imageView.setPadding(0, 0, 0, 0);
} else {
imageView = (ImageView) convertView;
}
FileInputStream fs = null;
Bitmap bm;
try {
fs = new FileInputStream(new File(imgPic.get(position).toString()));
if (fs != null) {
bm = BitmapFactory.decodeFileDescriptor(fs.getFD(), null, bfOptions);
imageView.setImageBitmap(bm);
imageView.setId(position);
imageView.setLayoutParams(new GridView.LayoutParams(300, 600));
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (fs != null) {
try {
fs.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return imageView;
}
}
}

Use setOnItemClickListener of girdview.
grid = (GridView) findViewById(R.id.gridviewimg);
grid.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
Toast.makeText(this, "you clicked at : " + position, Toast.LENGTH_LONG).show();
// put your intent here to open activity
}
});

put this code inside your onCreate(...) method.
grid.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
// do your stuff.
}
});

Android custom adapter list view images showing randomly while scroll

Hi i am a noob to android, I am trying to load some data to a ListView using custom adapter. I am using the following code for loading data. First time, it working well. But while I am trying to load more, then data loads and image is showing random while scrolling. After showing some random images in that list finally shows the correct image. It is repeating on the next scroll also
Here is my getView code
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
final ViewHolder holder;
if (v == null) {
LayoutInflater vi =
(LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.review_list_m, null);
v.setMinimumHeight(height);
holder = new ViewHolder();
holder.item1 = (TextView) v.findViewById(R.id.name);
holder.image = (ImageView) v.findViewById(R.id.posterView);
v.setTag(holder);
}
else
holder=(ViewHolder)v.getTag();
int colorPos = position % colors.length;
v.setBackgroundColor(Color.parseColor(colors[colorPos]));
final Custom custom = entries.get(position);
if (custom != null) {
holder.image.setBackgroundColor(Color.parseColor(colors[colorPos]));
holder.image.setLayoutParams(new LinearLayout.LayoutParams(height-10,width-10));
String imgUrl=custom.getImage();
AsyncHttpClient client = new AsyncHttpClient();
String[] allowedContentTypes = new String[] { "image/png", "image/jpeg" };
client.get(imgUrl, new BinaryHttpResponseHandler(allowedContentTypes) {
#Override
public void onSuccess(byte[] fileData) {
// Do something with the file
ByteArrayInputStream inputStream = new ByteArrayInputStream(fileData);
Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
holder.image.setImageBitmap(bitmap);
}
});
holder.item1.setHeight(height/3);
Log.v("PATH",custom.getcustomBig());
holder.item1.setText(custom.getcustomBig());
}
return v;
}
Any idea ? Please help
UPDATE
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
final ViewHolder holder;
if (v == null) {
LayoutInflater vi =
(LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.review_list_m, null);
v.setMinimumHeight(height);
holder = new ViewHolder();
holder.item1 = (TextView) v.findViewById(R.id.name);
holder.image = (ImageView) v.findViewById(R.id.posterView);
v.setTag(holder);
}
else
holder=(ViewHolder)v.getTag();
int colorPos = position % colors.length;
v.setBackgroundColor(Color.parseColor(colors[colorPos]));
final Custom custom = entries.get(position);
if (custom != null) {
holder.image.setBackgroundColor(Color.parseColor(colors[colorPos]));
holder.image.setLayoutParams(new LinearLayout.LayoutParams(height-10,width-10));
final String imgUrl=custom.getImage();
holder.image.setTag(imgUrl);
holder.image.setImageBitmap(null);
Bitmap cachedBitmap = cache.get(imgUrl);
if( cachedBitmap == null) {
Log.v("HERE","DOWNLOADING");
AsyncHttpClient client = new AsyncHttpClient();
String[] allowedContentTypes = new String[] { "image/png", "image/jpeg" };
client.get(imgUrl, new BinaryHttpResponseHandler(allowedContentTypes) {
#Override
public void onSuccess(byte[] fileData) {
// Do something with the file
ByteArrayInputStream inputStream = new ByteArrayInputStream(fileData);
Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
holder.image.setImageBitmap(bitmap);
}
});
}
else
{
holder.image.setImageBitmap(cachedBitmap);
}
holder.item1.setHeight(height/3);
//Log.v("PATH",custom.getcustomBig());
holder.item1.setText(custom.getcustomBig());
}

Problably you should set null bitmap to holder.image if v != null. Otherwise Android can show bitmap from other cell until new image is downloaded via async http request.
Example code (for problem with redownload images), it wasn't testes, but should give you idea how should it looks:
HashMap<String, Bitmap> cache = new HashMap<String, Bitmap>();
#Override
public View getView(int position, View convertView, ViewGroup parent) {
//....
final Custom custom = entries.get(position);
if (custom != null) {
holder.image.setBackgroundColor(Color.parseColor(colors[colorPos]));
holder.image.setLayoutParams(new LinearLayout.LayoutParams(height-10,width-10));
String imgUrl=custom.getImage();
Bitmap cachedBitmap = cache.get(imgUrl);
if( cachedBitmap == null) {
AsyncHttpClient client = new AsyncHttpClient();
String[] allowedContentTypes = new String[] { "image/png", "image/jpeg" };
client.get(imgUrl, new BinaryHttpResponseHandler(allowedContentTypes) {
#Override
public void onSuccess(byte[] fileData) {
// Do something with the file
ByteArrayInputStream inputStream = new ByteArrayInputStream(fileData);
Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
holder.image.setImageBitmap(bitmap);
cache.add( imgUrl, bitmap );
}
});
}
else
{
holder.image.setImageBitmap(cachedBitmap);
}
holder.item1.setHeight(height/3);
Log.v("PATH",custom.getcustomBig());
holder.item1.setText(custom.getcustomBig());
}

EDITed answer
Validate your imageview's tag hasn't change before you set the Bitmap.
You could try:
/**
* Caches an image (or a group of them) async.
* #author
*
*/
public static class ImageCacher extends AsyncTask<String, String, Integer>{
Context context;
ImageView iv;
Bitmap b;
public ImageCacher(Context context, ImageView iv){
this.context = context;
this.iv = iv;
}
#Override
protected Integer doInBackground(String... params) {
for(final String param:params){
//check if already CACHED
String filename = String.format("%d", param.hashCode());
File file = new File(context.getFilesDir(), filename);
if(file.exists()){
try {
b = BitmapFactory.decodeFile(file.getAbsolutePath());
} catch (Exception e) {
}
if(b != null){
if(iv != null){
iv.post(new Runnable() {
public void run() {
String tag = (String) iv.getTag();
if(tag != null){
if(tag.matches(param))
iv.setImageBitmap(b);
}
}
});
}
return 0;
}else{
file.delete();
}
}
//download
file = new File(context.getFilesDir(), filename);
b = saveImageFromUrl(context, param);
if(b != null){
if(iv != null){
iv.post(new Runnable() {
public void run() {
String tag = (String) iv.getTag();
if(tag != null){
if(tag.matches(param))
iv.setImageBitmap(b);
}
}
});
}
}
}
return 0;
}
}
/**
* Gets an image given its url
* #param param
*/
public static Bitmap saveImageFromUrl(Context context, String fullUrl) {
Bitmap b = null;
try {
URL url = new URL(fullUrl);
URLConnection conn = url.openConnection();
conn.setDoInput(true);
conn.connect();
//save bitmap to file
InputStream is = conn.getInputStream();
String filename = String.format("%d", fullUrl.hashCode());
File file = new File(context.getFilesDir(), filename);
if(file.exists()){
//delete
file.delete();
file=null;
}
file = new File(context.getFilesDir(), filename);
FileOutputStream out = new FileOutputStream(file);
byte buffer[] = new byte[256];
while(true){
int cnt = is.read(buffer);
if(cnt <=0){
break;
}
out.write(buffer,0, cnt);
}
out.flush();
out.close();
is.close();
b = BitmapFactory.decodeFile(file.getAbsolutePath());
} catch (Exception e) {
e.printStackTrace();
}
return b;
}
/**
* Gets an already cached photo
*
* #param context
* #param fullUrl
* #return
*/
public static Bitmap getCachedPhoto(Context context, String fullUrl){
System.gc();
String filename = String.format("%d", fullUrl.hashCode());
File file = new File(context.getFilesDir(), filename);
if(file.exists()){
try {
Bitmap b = BitmapFactory.decodeFile(file.getAbsolutePath());
return b;
} catch (Exception e) {
}
}
return null;
}
And then, to set the image in the adapter, you can do like:
//set info
vh.iv.setTag("");
String foto = your_url_goes_here;
vh.iv.setImageResource(R.drawable.fotodefault_2x);
if(!TextUtils.isEmpty(foto)){
vh.iv.setTag(foto);
Bitmap b = getCachedPhoto(context, foto);
if(b != null){
vh.iv.setImageBitmap(b);
}else{
new ImageCacher(context, vh.iv).execute(foto);
}
}
Don't forget to correctly encapsulate the class and methods.
Hope it helps.

I had this random pictures problem with my arrayAdapter. Then I used Picasso which takes care of imageView reusing in listview: http://square.github.io/picasso/
Example of code:
Picasso.with(mContext)
.load(url)
.resize(size, size)
.centerCrop()
.placeholder(R.drawable.image_holder)
.into(holder.imgDefaultImage);

Check when onClick is checked only?

I have a checkbox, that when checked, makes a bitmap and then saves that bitmap to internal storage. Then, in a gridView adapter, I have it check for the bitmap from internal storage with FileInputstream.
The issue is that the checkbox's onClick method is also in a class that extends baseadapter.
With the way it is now, when I start my app, it automatically checks for the bitmap and then returns a FileNotFound exception and then the onClick of the checkbox doesn't do anything.
I thought about this and realized that the reason it checks for it is that it is creating the gridView when I first open my app (which it is supposed to). In other words, it checks for the file because it is in the getView() method of my gridView adapter:
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// Try to reuse the views
ImageView view = (ImageView) convertView;
// if convert view is null then create a new instance else reuse it
if (view == null) {
view = new ImageView(Context);
Log.d("GridViewAdapter", "new imageView added");
}
try {
Bitmap bitmapA = null;
FileInputStream in = Context.openFileInput("bitmapA");
bitmapA = BitmapFactory.decodeStream(in);
in.close();
/*BufferedInputStream buf = new BufferedInputStream(in);
byte[] bitMapA = new byte[buf.available()];
buf.read(bitMapA);
Bitmap bM = BitmapFactory.decodeByteArray(bitMapA, 0, bitMapA.length);
*/view.setImageBitmap(bitmapA);
if (in != null) {
in.close();
}
/*if (buf != null) {
buf.close();
}*/
} catch (Exception e) {
e.printStackTrace();
}
view.setImageResource(drawables.get(position));
view.setScaleType(ImageView.ScaleType.CENTER_CROP);
view.setLayoutParams(new android.widget.GridView.LayoutParams(70, 70));
view.setTag(String.valueOf(position));
return view;
}
Is there a way that I can make it check internal storage ONLY IF the checkbox is checked?
Please note that the onClick method of the checkbox is in one class while I am getting the bitmap in another.
Here are my two full classes:
AppInfoAdapter (the one with the onClick method---I will only post the needed coding here):
package com.example.awesomefilebuilderwidget;
IMPORTS
public class AppInfoAdapter extends BaseAdapter {
private Context mContext;
private List<ResolveInfo> mListAppInfo;
private PackageManager mPackManager;
private List<ResolveInfo> originalListAppInfo;
private Filter filter;
private String fname;
public AppInfoAdapter(Context c, List<ResolveInfo> listApp,
PackageManager pm) {
mContext = c;
this.originalListAppInfo = this.mListAppInfo = listApp;
mPackManager = pm;
Log.d("AppInfoAdapter", "top");
}
#Override
public int getCount() {
Log.d("AppInfoAdapter", "getCount()");
return mListAppInfo.size();
}
#Override
public Object getItem(int position) {
Log.d("AppInfoAdapter", "getItem");
return mListAppInfo.get(position);
}
#Override
public long getItemId(int position) {
Log.d("AppInfoAdapter", "getItemId");
return position;
}
public static Bitmap scaleDownBitmap(Bitmap default_b, int newHeight, Context c) {
final float densityMultiplier = c.getResources().getDisplayMetrics().density;
int h= (int) (100*densityMultiplier);
int w= (int) (h * default_b.getWidth()/((double) default_b.getHeight()));
default_b=Bitmap.createScaledBitmap(default_b, w, h, true);
// TO SOLVE LOOK AT HERE:http://stackoverflow.com/questions/15517176/passing-bitmap-to-other-activity-getting-message-on-logcat-failed-binder-transac
return default_b;
}
public void SaveImage(Bitmap default_b) {
String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/saved_images");
myDir.mkdirs();
Random generator = new Random();
int n = 100000;
n = generator.nextInt(n);
String fname = "Image-" + n +".png";
File file = new File (myDir, fname);
Log.i("AppInfoAdapter", "" + file);
if (file.exists()) file.delete();
try {
// File f = new File(Environment.getExternalStorageDirectory().getAbsolutePath()
// + "/" + fname + ".png");
FileOutputStream out = mContext.getApplicationContext().openFileOutput("bitmapA", Context.MODE_WORLD_WRITEABLE);
// FileOutputStream out = new FileOutputStream(file);
default_b.compress(Bitmap.CompressFormat.PNG, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
// get the selected entry
final ResolveInfo entry = (ResolveInfo) mListAppInfo.get(position);
// reference to convertView
View v = convertView;
// inflate new layout if null
if (v == null) {
LayoutInflater inflater = LayoutInflater.from(mContext);
v = inflater.inflate(R.layout.layout_appinfo, null);
Log.d("AppInfoAdapter", "New layout inflated");
}
// load controls from layout resources
ImageView ivAppIcon = (ImageView) v.findViewById(R.id.ivIcon);
TextView tvAppName = (TextView) v.findViewById(R.id.tvName);
TextView tvPkgName = (TextView) v.findViewById(R.id.tvPack);
final CheckBox addCheckbox = (CheckBox) v
.findViewById(R.id.addCheckbox);
Log.d("AppInfoAdapter", "Controls from layout Resources Loaded");
// set data to display
ivAppIcon.setImageDrawable(entry.loadIcon(mPackManager));
tvAppName.setText(entry.activityInfo.loadLabel(mPackManager));
tvPkgName.setText(entry.activityInfo.packageName);
Log.d("AppInfoAdapter", "Data Set To Display");
addCheckbox
.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (addCheckbox.isChecked()) {
System.out.println("Checked");
PackageManager pm = mContext.getPackageManager();
Drawable icon = null;
try {
icon = pm
.getApplicationIcon(entry.activityInfo.packageName);
} catch (NameNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Drawable default_icon = pm.getDefaultActivityIcon();
if (icon instanceof BitmapDrawable
&& default_icon instanceof BitmapDrawable) {
BitmapDrawable icon_bd = (BitmapDrawable) icon;
Bitmap icon_b = icon_bd.getBitmap();
BitmapDrawable default_bd = (BitmapDrawable) pm
.getDefaultActivityIcon();
Bitmap default_b = default_bd.getBitmap();
if (icon_b == default_b) {
// It's the default icon
scaleDownBitmap(default_b, 100, v.getContext());
Log.d("AppInfoAdapter", "Scale Bitmap Chosen");
SaveImage(default_b);
Log.d("AppInfoAdapter", "Scaled BM saved to External Storage");
Intent intent = new Intent(v.getContext(), GridViewAdapter.class);
// intent.hasExtra("bitmapA");
v.getContext().startActivity(intent);
Log.d("AppInfoAdapter", "Intent started to send Bitmap");
}
}
} else {
System.out.println("Un-Checked");
}
}
});
// return view
return v;
}
GridViewAdapter:
package com.example.awesomefilebuilderwidget;
IMPORTS
public class GridViewAdapter extends BaseAdapter {
private Context Context;
// Keep all Images in array list
public ArrayList<Integer> drawables = new ArrayList<Integer>();
// Constructor
public GridViewAdapter(Context c){
Context = c;
Log.d("GridViewAdapter", "Constructor is set");
drawables.add(R.drawable.pattern1);
Log.d("GridViewAdapter", "pattern1 added");
drawables.add(R.drawable.pattern2);
Log.d("GridViewAdapter", "pattern2 added");
drawables.add(R.drawable.trashcan);
Log.d("GridViewAdapter", "trashcan added");
drawables.add(R.drawable.ic_launcher);
Log.d("GridViewAdapter", "ic_launcher added");
Bitmap default_b = BitmapFactory.decodeFile("picture");
}
#Override
// How many items are in the data set represented by this Adapter
public int getCount() {
return drawables.size();
}
#Override
// Get the data item associated with the specified position in the
// data set
public Object getItem(int position) {
return drawables.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// Try to reuse the views
ImageView view = (ImageView) convertView;
// if convert view is null then create a new instance else reuse it
if (view == null) {
view = new ImageView(Context);
Log.d("GridViewAdapter", "new imageView added");
}
try {
Bitmap bitmapA = null;
FileInputStream in = Context.openFileInput("bitmapA");
bitmapA = BitmapFactory.decodeStream(in);
in.close();
/*BufferedInputStream buf = new BufferedInputStream(in);
byte[] bitMapA = new byte[buf.available()];
buf.read(bitMapA);
Bitmap bM = BitmapFactory.decodeByteArray(bitMapA, 0, bitMapA.length);
*/view.setImageBitmap(bitmapA);
if (in != null) {
in.close();
}
/*if (buf != null) {
buf.close();
}*/
} catch (Exception e) {
e.printStackTrace();
}
view.setImageResource(drawables.get(position));
view.setScaleType(ImageView.ScaleType.CENTER_CROP);
view.setLayoutParams(new android.widget.GridView.LayoutParams(70, 70));
view.setTag(String.valueOf(position));
return view;
}
}
FURTHER UPDATED CODING:
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// Try to reuse the views
ImageView view = (ImageView) convertView;
boolean checked = (mCheckBox==null)?false:(((CheckBox) mCheckBox).isChecked());
// if convert view is null then create a new instance else reuse it
if (view == null) {
view = new ImageView(Context);
Log.d("GridViewAdapter", "new imageView added");
}
if(checked = true){
try {
Bitmap bitmapA = null;
FileInputStream in = Context.openFileInput("bitmapA");
bitmapA = BitmapFactory.decodeStream(in);
in.close();
/*BufferedInputStream buf = new BufferedInputStream(in);
byte[] bitMapA = new byte[buf.available()];
buf.read(bitMapA);
Bitmap bM = BitmapFactory.decodeByteArray(bitMapA, 0, bitMapA.length);
*/view.setImageBitmap(bitmapA);
if (in != null) {
in.close();
}
/*if (buf != null) {
buf.close();
}*/
} catch (Exception e) {
e.printStackTrace();
}}
PLUS I ADDED THIS METHOD:
public void setCheckBox(CheckBox checkbox){
mCheckBox=checkbox;
}
AND THIS VARIABLE:
CheckBox mCheckBox=null;

You dont need to listen to the onClick event in the adapter.
Instead, you can read the checkbox status.
for this, in your adapter, you add a field and a setter:
CheckBox mCheckBox=null;
public void setCheckBox( CheckBox checkbox){
mCheckBox=checkbox;
}
and then, in the getView(), you add thiss line at the begining;
boolean checked = (mCheckBox==null)?false:(((CheckBox) mCheckBox).isChecked());
UPDATE
then in your activity, i suppose you have something like
GridViewAdapter mGridViewAdapter= new GridViewAdapter(this);
so, below you have to add:
CheckBox mCheckBox = findViewById(R,id.YOURCHECKBOXID);
mGridViewAdapter.setCheckBox(mCheckBox);
And that's it!