Develop Reference

Can't open PDF from asset from list button

I have 2 apps that I have PDFs in the asset folders. In app A the code works perfectly fine but in app B it doesn't work. I don't get any errors. When clicking the button in app B it opens adobe acrobat but I get a toast saying "This file could not be accessed. check the location or network and try again". I even put the PDF in app A to make sure nothing was wrong with this PDF file. It opened fine in app A.
Here is my code for app B. I'm trying to open it via a button in a list.
[CODE]
public class InteractiveArrayAdapter extends ArrayAdapter<String> {
private final Context context;
private final String[] values;
static final String TAG = InteractiveArrayAdapter.class.getSimpleName();
String ta = "helen.pdf";
GPXParser mParser = new GPXParser();
public InteractiveArrayAdapter(Context context, String[] values) {
super(context, R.layout.rowbuttonlayout, values);
this.context = context;
this.values = values;
}
static class ViewHolder {
protected TextView text,header, number, web;
protected ImageButton web_pic, imageView;
ImageView bike, atv, utv;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
if (convertView == null) {
LayoutInflater inflator = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflator.inflate(R.layout.rowbuttonlayout, null);
final ViewHolder viewHolder = new ViewHolder();
viewHolder.header = (TextView) view.findViewById(R.id.header);
viewHolder.text = (TextView) view.findViewById(R.id.label);
viewHolder.bike = (ImageView) view.findViewById(R.id.bike);
viewHolder.atv = (ImageView) view.findViewById(R.id.atv);
viewHolder.utv = (ImageView) view.findViewById(R.id.utv);
viewHolder.web_pic = (ImageButton) view.findViewById(R.id.web_pic);
viewHolder.imageView = (ImageButton) view.findViewById(R.id.check);
view.setTag(viewHolder);
viewHolder.imageView.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent myIntent = new Intent(context, MapActivity.class);
context.startActivity(myIntent);
}
});
viewHolder.web_pic.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
copyReadAssets();
}
});
}
ViewHolder holder = (ViewHolder) view.getTag();
holder.header.setText(values[position]);
holder.imageView.setImageResource(R.drawable.map1);
holder.web_pic.setImageResource(R.drawable.pdf);
holder.bike.setImageResource(R.drawable.bike);
holder.atv.setImageResource(R.drawable.atv_2);
holder.utv.setImageResource(R.drawable.utv);
if (position == 0) {
holder.text.setText("17.82 mi");
}
if (position == 1) {
holder.text.setText("29.09 mi");
}
if (position == 2) {
holder.text.setText("11.06 mi");
}
return view;
}
private void copyReadAssets() {
AssetManager assetManager =context. getAssets();
InputStream in = null;
OutputStream out = null;
File file = new File(context.getFilesDir(), ta);
try {
in = assetManager.open(ta);
out = context.openFileOutput(file.getName(), Context.MODE_WORLD_READABLE);
copyFile(in, out);
in.close();
in = null;
out.flush();
out.close();
out = null;
} catch (Exception e) {
Log.e("tag", e.getMessage());
}
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(
Uri.parse("file://" +context. getFilesDir() + "/"+ta),
"application/pdf");
context. startActivity(intent);
}
private void copyFile(InputStream in, OutputStream out) throws IOException {
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
}
}
[CODE/]

Try below code to open PDF,
in = assetManager.open(ta);
String out= Environment.getExternalStorageDirectory().getAbsolutePath() +"/"+ ta);
File outFile = new File(out, ta);
FileOutputStream oStream = new FileOutputStream(outFile);
copyFile(in, oStream);

How to share an image on social sites from a folder

I am saving some images in a folder of internal memory and displaying these all saved images on a button click . now i want to share current open image on social site as facebook, gmail etc.I m able to share text but not image.
Code for saving image is...
RelativeLayout content = (RelativeLayout) findViewById(R.id.relative);
content.setDrawingCacheEnabled(true);
Bitmap bitmap = content.getDrawingCache();
File myDir=new File("/sdcard/MyCollection");
myDir.mkdirs();
Random generator = new Random();
int n = 10000;
n = generator.nextInt(n);
String fname = "Image-"+ n +".jpg";
File file = new File (myDir, fname);
if (file.exists ()) file.delete ();
FileOutputStream outStream;
try {
outStream = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, outStream);
outStream.flush();
outStream.close();
}
catch (FileNotFoundException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
code for image access is .......
ImageButton sharingButton = new ImageButton(this);
sharingButton.setLayoutParams(new ViewGroup.LayoutParams(RadioGroup.LayoutParams.WRAP_CONTENT, RadioGroup.LayoutParams.WRAP_CONTENT));
sharingButton.setImageResource(R.drawable.alert);
getFromfolder();
String[] projection = {MediaStore.Images.Thumbnails._ID};
cursor = managedQuery( MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI,
projection,
null,
null,
MediaStore.Images.Thumbnails.IMAGE_ID);
columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID);
GridView sdcardImages = (GridView) findViewById(R.id.gridview);
sdcardImages.setAdapter(new ImageAdapter());
sdcardImages.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView parent, View v, int position, long id) {
String[] projection = {MediaStore.Images.Media.DATA};
cursor = managedQuery( MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
projection,
null,
null,
null);
columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToPosition(position);
String imagePath = cursor.getString(columnIndex);
}
});
}
public void getFromfolder()
{
File file= new File(android.os.Environment.getExternalStorageDirectory(),"MyCollection");
if (file.isDirectory())
{
listFile = file.listFiles();
for (int i = 0; i < listFile.length; i++)
{
f.add(listFile[i].getAbsolutePath());
}
}
}
public class ImageAdapter extends BaseAdapter {
private LayoutInflater mInflater;
public ImageAdapter() {
mInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
return f.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(
R.layout.gelleryitem, null);
holder.imageview = (ImageView) convertView.findViewById(R.id.thumbImage);
convertView.setTag(holder);
}
else {
holder = (ViewHolder) convertView.getTag();
}
Bitmap myBitmap = BitmapFactory.decodeFile(f.get(position));
holder.imageview.setImageBitmap(myBitmap);
return convertView;
}
}
class ViewHolder {
ImageView imageview;
}

First you have to fetch the image as a bitmap from the file path. Then you can pass the image to other applications through an intent. If you want a string to passed along with the image, you can pass it through the intent as EXTRA_TEXT. Add WRITE_EXTERNAL_STORAGE in the permissions. Try this:
File imgFile = new File(imagePath);
if(imgFile.exists()){
Bitmap icon = BitmapFactory.decodeFile(imagePath);
Intent share = new Intent(Intent.ACTION_SEND);
share.setType("image/jpeg");
ContentValues values = new ContentValues();
values.put(Images.Media.TITLE, "title");
values.put(Images.Media.MIME_TYPE, "image/jpeg");
Uri uri = getContentResolver().insert(Media.EXTERNAL_CONTENT_URI,
values);
OutputStream outstream;
try {
outstream = getContentResolver().openOutputStream(uri);
icon.compress(Bitmap.CompressFormat.JPEG, 100, outstream);
outstream.close();
} catch (Exception e) {
System.err.println(e.toString());
}
//text
share.putExtra(Intent.EXTRA_TEXT, "Text that has to be shared");
//image
share.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(share, "Share Image"));
}

To add the image as an email attachment look here, at the Intent.EXTRA_STREAM section: https://developer.android.com/guide/components/intents-common.html#Email
For Facebook look here: https://developers.facebook.com/docs/sharing/android

How to attach image from drawable to gmail?

I am trying to attach image from my gridview to gmail or facebook,but whenever i tried to attach my app got crash,and i am getting following error with nullpointer exception,following is my code with gridview image selection,can any one help?
public class Free_Cover_Activity extends AppCompatActivity
{
GridView grid;
int[] imageId = {
R.drawable.discovercover,
R.drawable.burpresswordfree,
R.drawable.flyfree,
R.drawable.cantmovefree,
R.drawable.cantmovewordfree,
R.drawable.chalkthisfree,
R.drawable.fivehundredmetersfree,
R.drawable.freeexercise,
R.drawable.gym_smilie,
R.drawable.hundredcalrairesfree,
R.drawable.injuryfree,
R.drawable.jumpropefree,
R.drawable.nicesnathcfree,
R.drawable.personglrecordfree,
R.drawable.posefree,
R.drawable.pushupfree,
R.drawable.shoulder,
R.drawable.timewordfree,
R.drawable.unbrokernfree,
R.drawable.weightbeltfree
};
private Bitmap mBitmap;
private Intent email;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.free_cover_gridview);
android.support.v7.app.ActionBar abar = getSupportActionBar();
ColorDrawable colorDrawable = new ColorDrawable(Color.parseColor("#D64365"));
abar.setBackgroundDrawable(colorDrawable);
abar.hide();
CustomGridFreeCover adapter =
new CustomGridFreeCover(Free_Cover_Activity.this, imageId);
grid=(GridView)findViewById(R.id.freecover_grid);
grid.setAdapter(adapter);
grid.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
try
{
Bitmap largeIcon =
BitmapFactory.decodeResource(getResources(), R.drawable.discovercover);
/*
replace "R.drawable.bubble_green" with the image resource
you want to share from drawable
*/
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
largeIcon.compress(Bitmap.CompressFormat.JPEG, 40, bytes);
//you can create a new file name "test.jpg" in sdcard folder.
File f =
new File(Environment.getExternalStorageDirectory() + File.separator + "test.jpg");
f.createNewFile();
//write the bytes in file
FileOutputStream fo = new FileOutputStream(f);
fo.write(bytes.toByteArray());
//remember close de FileOutput
fo.close();
} catch (IOException e) {
//TODO Auto-generated catch block
e.printStackTrace();
}
Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND);
shareIntent.setType("image/jpeg");
//set your subject
shareIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Hi");
//set your message
shareIntent.putExtra(android.content.Intent.EXTRA_TEXT, "How are you");
String imagePath = Environment.getExternalStorageDirectory()
+ File.separator + "test.jpg";
File imageFileToShare = new File(imagePath);
Uri uri = Uri.fromFile(imageFileToShare);
shareIntent.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(shareIntent, "Share Image"));
}
});
}
public class CustomGridFreeCover extends BaseAdapter
{
private Context mContext;
//private final String[] web;
private final int[] Imageid;
public CustomGridFreeCover(Context c,int[] Imageid )
{
mContext = c;
this.Imageid = Imageid;
//this.web = web;
}
#Override
public int getCount()
{
//TODO Auto-generated method stub
return Imageid.length;
}
#Override
public Object getItem(int position) {
//TODO Auto-generated method stub
return null;
}
#Override
public long getItemId(int position) {
//TODO Auto-generated method stub
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent)
{
//TODO Auto-generated method stub
View grid;
LayoutInflater inflater = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null)
{
grid = new View(mContext);
grid = inflater.inflate(R.layout.free_cover_griditem, null);
//TextView textView = (TextView) grid.findViewById(R.id.grid_text);
ImageView imageView = (ImageView)grid.findViewById(R.id.grid_image_freecover);
//textView.setText(web[position]);
imageView.setImageResource(Imageid[position]);
} else {
grid = (View) convertView;
}
return grid;
}
}
}

Here is the working code which you need:
Firstly save image from Drawable to SD Card here is the code:
try{
Bitmap largeIcon = BitmapFactory.decodeResource(getResources(), R.drawable.bubble_green);
//replace "R.drawable.bubble_green" with the image resource you want to share from drawable
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
largeIcon.compress(Bitmap.CompressFormat.JPEG, 40, bytes);
// you can create a new file name "test.jpg" in sdcard folder.
File f = new File(Environment.getExternalStorageDirectory() + File.separator + "test.jpg");
f.createNewFile();
// write the bytes in file
FileOutputStream fo = new FileOutputStream(f);
fo.write(bytes.toByteArray());
// remember close de FileOutput
fo.close();
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Then get the saved image from SD card and attach in the email intent like this:
Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND);
shareIntent.setType("image/jpeg");
shareIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Hi"); //set your subject
shareIntent.putExtra(android.content.Intent.EXTRA_TEXT, "How are you"); //set your message
String imagePath = Environment.getExternalStorageDirectory() + File.separator + "test.jpg";
File imageFileToShare = new File(imagePath);
Uri uri = Uri.fromFile(imageFileToShare);
shareIntent.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(shareIntent, "Share Image"));

This is what worked for me perfectly.
Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND);
shareIntent.setType("image/jpeg");
shareIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, getResources().getString(R.string.share_subject));
shareIntent.putExtra(android.content.Intent.EXTRA_TEXT, getResources().getString(R.string.share_message));
shareIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse("android.resource://" + C.PROJECT_PATH + "/drawable/" + R.drawable.image_to_share);
startActivity(Intent.createChooser(shareIntent, "Share Image"));
But I will always recommend to decode a Bitmap from this resource, save it as a File in the storage and then use that file. A more reliable way this directly using from the resources.

roman thing is you are passing a null bitmap object
Bitmap icon = mBitmap;
you need to assign bitmap first then the code will start work
for more info you can have a look on to below links :-
https://github.com/codepath/android_guides/wiki/Sharing-Content-with-Intents
http://developer.android.com/training/sharing/send.html

First Convert your drwable to image and store it on SDCard
Store Drawable to SD card
Then
private void shareImage() {
Intent share = new Intent(Intent.ACTION_SEND);
// setType("image/png"); OR for jpeg: setType("image/jpeg");
share.setType("image/*");
// Make sure you put example png image named yourImg.png in your
// directory
String imagePath = Environment.getExternalStorageDirectory()
+ "/yourImg.png";
File imageFileToShare = new File(imagePath);
Uri uri = Uri.fromFile(imageFileToShare);
share.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(share, "Share Image!"));
}

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!