I have a gallery that is displaying thumbnail images in custom directories. The gallery displays fine, but I am unable to open the full image by clicking the thumbnail. My [non functioning] click listener is below
try {
if (LoadImageFiles() == true) {
GridView imgGallery = (GridView) findViewById(R.id.gallery);
final ImageAdapter ia = new ImageAdapter(PersonMedia.this);
imgGallery.setAdapter(ia);
// Set up a click listener
imgGallery.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
String imgPath = paths.get(position);
Intent intent = new Intent(getApplicationContext(), ViewImage.class);
intent.putExtra("filename", imgPath);
startActivity(intent);
}
});
}
} catch (Exception ex) {
Log.e("PersonMedia.LoadPictures", ex.getMessage());
}
Here is how the gallery is populated
//Declare a module level hashtable
private Hashtable<Integer, String> paths;
private boolean LoadImageFiles() {
try{
mySDCardImages = new Vector<ImageView>();
paths = new Hashtable<Integer, String>();
fileCount = 0;
sdDir = new File(imageDirectory);
sdDir.mkdir();
if (sdDir.listFiles() != null)
{
File[] sdDirFiles = sdDir.listFiles();
if (sdDirFiles.length > 0)
{
for (File singleFile : sdDirFiles)
{
Bitmap bmap = decodeFile(singleFile);
BitmapDrawable pic = new BitmapDrawable(bmap);
ImageView myImageView = new ImageView(PersonMedia.this);
myImageView.setImageDrawable(pic);
myImageView.setId(mediaCount);
paths.put(fileCount, singleFile.getAbsolutePath());
mySDCardImages.add(myImageView);
mediaCount++;
fileCount ++;
}
}
}
}
catch(Exception ex){ Log.e("LoadImageFiles", ex.getMessage()); }
return (fileCount > 0);
}
I was able to resolve this by using a hashtable to store the position and path of the images when the thumbnails are loaded. Below are the 2 pertinent code snippets
//Where the gallery is populated and the onclick is defined
private void PopulateGallery() {
try {
if (LoadImageFiles() == true) {
GridView imgGallery = (GridView) findViewById(R.id.gallery);
imgGallery.setAdapter(new ImageAdapter(PersonMedia.this));
// Set up a click listener
imgGallery.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
String imgPath = paths.get(position);
Intent intent = new Intent(getApplicationContext(), ViewImage.class);
intent.putExtra("filename", imgPath);
startActivity(intent);
}
});
}
} catch (Exception ex) {
Log.e("PersonMedia.LoadPictures", ex.getMessage());
}
}
//Where the images are loaded. You'll need to create a module level hashtable
private Hashtable<Integer, String> paths;
private boolean LoadImageFiles() {
try{
mySDCardImages = new Vector<ImageView>();
paths = new Hashtable<Integer, String>();
fileCount = 0;
sdDir = new File(imageDirectory);
sdDir.mkdir();
if (sdDir.listFiles() != null)
{
File[] sdDirFiles = sdDir.listFiles();
if (sdDirFiles.length > 0)
{
for (File singleFile : sdDirFiles)
{
Bitmap bmap = decodeFile(singleFile);
BitmapDrawable pic = new BitmapDrawable(bmap);
ImageView myImageView = new ImageView(PersonMedia.this);
myImageView.setImageDrawable(pic);
myImageView.setId(mediaCount);
paths.put(fileCount, singleFile.getAbsolutePath());
mySDCardImages.add(myImageView);
mediaCount++;
fileCount ++;
}
}
}
}
catch(Exception ex){ Log.e("LoadImageFiles", ex.getMessage()); }
return (fileCount > 0);
}
Do your images have extensions, such as .jpg or .png? I'm not quite sure but it looks like you are looking for an image that is string version of your personId, without any file extension.
Please correct me if I'm wrong.
Also please post more details, such as the errors you are getting.
Updated answer below.
Use View.setTag(Object), when you are adding items to your ListView (I am guessing). You can call something like the following.
view.setTag("imgFile.jpg");
And then from inside of your onClickListener, just do this:
String img = (String) getTag();
Related
I have a Gridview in my App...
The Gridview shows all the available files in a particular folder, lets say 'Sample Folder'...
What I am trying is to pass the ACTION_VIEW Intent on item click but I am not able to set its Data and Type...
Most of the files are either image or videos...
Here's the code for Activity -
public class Downloaded extends AppCompatActivity {
// Declare variables
private String[] FilePathStrings;
private String[] FileNameStrings;
private File[] listFile;
GridView grid;
GridViewAdapter adapter;
File file;
TextView empty;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gallery);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
// Check for SD Card
if (!Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
Toast.makeText(Downloaded.this, "Error! No SDCARD Found!", Toast.LENGTH_LONG)
.show();
} else {
// Locate the image folder in your SD Card
file = new File(Environment.getExternalStorageDirectory()
+ File.separator + "Sample");
file.mkdirs();
}
if (file.isDirectory()) {
listFile = file.listFiles();
// Create a String array for FilePathStrings
FilePathStrings = new String[listFile.length];
// Create a String array for FileNameStrings
FileNameStrings = new String[listFile.length];
for (int i = 0; i < listFile.length; i++) {
// Get the path of the image file
FilePathStrings[i] = listFile[i].getAbsolutePath();
// Get the name image file
FileNameStrings[i] = listFile[i].getName();
}
}
// Locate the GridView in gridview_main.xml
grid = (GridView) findViewById(R.id.gridview);
empty = (TextView) findViewById(R.id.empty);
empty.setText("You haven't saved any Pic yet...!");
grid.setEmptyView(empty);
// Pass String arrays to LazyAdapter Class
adapter = new GridViewAdapter(Downloaded.this, FilePathStrings, FileNameStrings);
// Set the LazyAdapter to the GridView
grid.setAdapter(adapter);
// Capture gridview item click
grid.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent i = new Intent(android.content.Intent.ACTION_VIEW);
//Don't Know what to Do Here :(
File n = new File(Environment.getExternalStorageDirectory()+ File.separator + "Sample/" + FileNameStrings);
i.setDataAndType(Uri.fromFile(n), "*/*");
startActivity(Intent.createChooser(i, "Choose an App"));
}
});
}
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId()){
case android.R.id.home:
onBackPressed();
break;
}
return true;
}
}
And here's the Adapter -
public class GridViewAdapter extends BaseAdapter {
// Declare variables
private Activity activity;
String[] filepath;
String[] filename;
Context mContext;
private static LayoutInflater inflater = null;
public GridViewAdapter( Context c ) {
mContext = c ;
}
public GridViewAdapter(Activity a, String[] fpath, String[] fname) {
activity = a;
this.filepath = fpath;
filename = fname;
inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
return this.filepath.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
View vi = convertView;
if (convertView == null)
vi = inflater.inflate(R.layout.gridview_item, null);
// Locate the ImageView in gridview_item.xml
ImageView img = (ImageView) vi.findViewById(R.id.image);
// Set file name to the TextView followed by the position
TextView txt = (TextView) vi.findViewById(R.id.name);
// Decode the filepath with BitmapFactory followed by the position
// Set the decoded bitmap into ImageView
Glide.with(activity)
.load(filepath[position])
.into(img);
txt.setText(filename[position]);
return vi;
}
}
Any help would be appreciated... :)
Try like this
Intent i = new Intent(android.content.Intent.ACTION_VIEW);
// No need to set both Type & Data. if you set one itself enough
File n = new File(Environment.getExternalStorageDirectory()+ File.separator + "Sample/" + FileNameStrings);
i.setType(MimeTypeMap.getFileExtensionFromUrl(n.getAbsolutePath()));
startActivity(Intent.createChooser(i, "Choose an App"));
Updated
Try this for open file
MimeTypeMap myMime = MimeTypeMap.getSingleton();
Intent newIntent = new Intent(Intent.ACTION_VIEW);
String mimeType = myMime.getMimeTypeFromExtension(fileExt(file).substring(1));
newIntent.setDataAndType(Uri.fromFile(file),mimeType);
newIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
try {
context.startActivity(newIntent);
} catch (ActivityNotFoundException e) {
Toast.makeText(context, "No handler for this type of file.", Toast.LENGTH_LONG).show();
}
private String fileExt(String url) {
if (url.indexOf("?") > -1) {
url = url.substring(0, url.indexOf("?"));
}
if (url.lastIndexOf(".") == -1) {
return null;
} else {
String ext = url.substring(url.lastIndexOf(".") + 1);
if (ext.indexOf("%") > -1) {
ext = ext.substring(0, ext.indexOf("%"));
}
if (ext.indexOf("/") > -1) {
ext = ext.substring(0, ext.indexOf("/"));
}
return ext.toLowerCase();
}
}
I have a listview that is able to delete a specific image via onLongClick, but it isn't working so far. When testing, the dialog appears If i want to delete or not, i press Yes/Ok and the toast appears saying Item deleted, however the item is still there.
UPDATED ( I got the remove and delete function working thanks to user1140237)
UPDATED MAIN ACTIVITY
private String[] FilePathStrings;
private String[] FileNameStrings;
private File[] listFile;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_yearbook);
File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),"/CapturyGallery");
// Check for SD Card
if (!Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
Toast.makeText(this, "Error! No SDCARD Found!", Toast.LENGTH_LONG)
.show();
} else {
// Locate the image folder in your SD Card
file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),"/CapturyGallery");
// Create a new folder if no folder named CapturyGallery exist
file.mkdirs();
}
if (file.isDirectory())
{
listFile = file.listFiles();
// Create a String array for FilePathStrings
FilePathStrings = new String[listFile.length];
// Create a String array for FileNameStrings
FileNameStrings = new String[listFile.length];
for (int i = 0; i < listFile.length; i++)
{
//Get the path image file
FilePathStrings[i] = listFile[i].getAbsolutePath();
// Get the name image file
FileNameStrings[i] = listFile[i].getName();
}
}
Arrays.sort(listFile);
final ListAdapter listAdapter = new CustomAdapter(Yearbook.this, FilePathStrings, FileNameStrings);
ListView lv = (ListView) findViewById(R.id.ListingView);
lv.setAdapter(listAdapter);
final ArrayList<String> list = new ArrayList(Arrays.asList(FilePathStrings));
lv.setOnItemClickListener(this);
lv.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
#Override
public boolean onItemLongClick(AdapterView<?> parent, View view, final int position, long id) {
//Deletes item
AlertDialog.Builder adb=new AlertDialog.Builder(Yearbook.this);
adb.setTitle("Delete?");
adb.setMessage("Are you sure you want to delete " + FileNameStrings[position]);
final int positionToRemove = position;
adb.setNegativeButton("Cancel", null);
adb.setPositiveButton("Ok", new AlertDialog.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
File file = new File(list.get(positionToRemove));
if (file.delete()) {
list.remove(position);
((CustomAdapter) listAdapter).updateMyData(FilePathStrings, FileNameStrings);
Toast.makeText(getApplicationContext(), FileNameStrings[position] + " deleted", Toast.LENGTH_LONG).show();
}
}
});
adb.show();
return true;
}
});
}
CUSTOMADAPTER
public class CustomAdapter extends BaseAdapter {
private Activity activity;
private String[] filepath;
private String[] filename;
private static LayoutInflater inflater = null;
public CustomAdapter(Activity a, String[] fpath, String[] fname) {
activity = a;
filepath = fpath;
filename = fname;
inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public void updateMyData(String[] fpath, String[] fname) {
filepath = fpath;
filename = fname;
notifyDataSetChanged();
}
#Override
public int getCount() {
return filepath.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
class MyViewHolder {
ImageView myImage;
TextView timestamp;
TextView myName;
TextView myHeader;
MyViewHolder(View v) {
myImage = (ImageView) v.findViewById(R.id.PicView);
timestamp = (TextView) v.findViewById(R.id.timestamp);
myName = (TextView) v.findViewById(R.id.myName);
myHeader = (TextView) v.findViewById(R.id.textSeparator);
}
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View vi = convertView;
MyViewHolder holder = null;
if (vi == null) {
vi = inflater.inflate(R.layout.custom_row, null);
holder = new MyViewHolder(vi);
vi.setTag(holder);
} else {
holder = (MyViewHolder) vi.getTag();
}
Bitmap bmp = ThumbnailUtils.extractThumbnail(BitmapFactory.decodeFile(filepath[position]),100,100);
holder.myImage.setImageBitmap(bmp);
//PicImage.setScaleType(ImageView.ScaleType.CENTER_CROP);
holder.myImage.setPadding(8, 8, 8, 8);
//Set Title
holder.myName.setText(filename[position]);
ExifInterface intf = null;
try {
intf = new ExifInterface(filepath[position]);
} catch(IOException e) {
e.printStackTrace();
}
if(intf != null) {
String dateString = intf.getAttribute(ExifInterface.TAG_DATETIME);
holder.timestamp.setText("Date Taken: " + dateString.toString());
}
return vi;
}
And so my last problem is, whenever i remove something from my listview it crashed. However, the file was indeed removed. Im not sure what is the error because i tested it on my mobile phone
You need to update list data in your custom adapter too. after removing than call notifydatasetchanged
Keep below method in you customadapter to udpate list data & after that call it in longpress
public void updateMyData(String[] fpath, String[] fname) {
filepath = fpath;
filename = fname;
notifyDataSetChanged();
}
You need to call this from longPress
list.remove(position);
((CustomAdapter )listAdapter).updateMyData( FilePathStrings, FileNameStrings); /// here in your case you need to define both array global sorry not time to clean up your code
Toast.makeText(getApplicationContext(), FileNameStrings[position] +" deleted",Toast.LENGTH_LONG).show();
UPDATED
To remove file from the mentioned dir & updating listview you need to delete file from that location first and than you need to update listview
File file = new File(list.get(position));
if (file.delete()) {// this will required permission in Manifest for Write_EXTERNAL_STORATE
// if file is deleted from SD CARD
list.remove(position);
((CustomAdapter )listAdapter).updateMyData( FilePathStrings, FileNameStrings); /// here in your case you need to define both array global sorry not time to clean up your code
Toast.makeText(getApplicationContext(), FileNameStrings[position] + " deleted", Toast.LENGTH_LONG).show();
}
*CustomAdapter *
public class CustomAdapter extends BaseAdapter {
private Activity activity;
private ArrayList<String> filepath;
private ArrayList<String> filename;
private JSONArray jListData;
private int size = 0;
public CustomAdapter(Activity a, JSONArray jListData) {
activity = a;
this.jListData = jListData;
if (filepath != null)
size = jListData.length();
}
public void updateMyData(JSONArray jListData) {
this.jListData = jListData;
size = jListData.length();
notifyDataSetChanged();
}
#Override
public int getCount() {
return size;
}
public JSONObject getItem(int position) {
try {
return (JSONObject) jListData.get(position);
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
public long getItemId(int position) {
return position;
}
class MyViewHolder {
ImageView myImage;
TextView timestamp;
TextView myName;
TextView myHeader;
MyViewHolder(View v) {
myImage = (ImageView) v.findViewById(R.id.PicView);
timestamp = (TextView) v.findViewById(R.id.timestamp);
myName = (TextView) v.findViewById(R.id.myName);
myHeader = (TextView) v.findViewById(R.id.textSeparator);
}
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View vi = convertView;
MyViewHolder holder = null;
try {
if (vi == null) {
vi = LayoutInflater.from(activity).inflate(R.layout.custom_row, parent, false);
holder = new MyViewHolder(vi);
vi.setTag(holder);
} else {
holder = (MyViewHolder) vi.getTag();
}
JSONObject rowObject = this.jListData.getJSONObject(position);
Bitmap bmp = ThumbnailUtils.extractThumbnail(BitmapFactory.decodeFile(rowObject.optString("filename")), 100, 100);
holder.myImage.setImageBitmap(bmp);
//PicImage.setScaleType(ImageView.ScaleType.CENTER_CROP);
holder.myImage.setPadding(8, 8, 8, 8);
//Set Title
holder.myName.setText(rowObject.optString("filename"));
ExifInterface intf = null;
try {
intf = new ExifInterface(rowObject.optString("filepath"));
} catch (IOException e) {
e.printStackTrace();
}
if (intf != null) {
String dateString = intf.getAttribute(ExifInterface.TAG_DATETIME);
holder.timestamp.setText("Date Taken: " + dateString.toString());
}
} catch (JSONException e) {
}
return vi;
}
}
ACTIVITY
private JSONArray jArrayFileData;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_yearbook);
File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "/CapturyGallery");
// Check for SD Card
if (!Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
Toast.makeText(this, "Error! No SDCARD Found!", Toast.LENGTH_LONG)
.show();
} else {
// Locate the image folder in your SD Card
file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "/CapturyGallery");
// Create a new folder if no folder named CapturyGallery exist
file.mkdirs();
}
jArrayFileData = new JSONArray();
if (file.isDirectory()) {
listFile = file.listFiles();
// Create a String array for FilePathStrings
FilePathStrings = new String[listFile.length];
// Create a String array for FileNameStrings
FileNameStrings = new String[listFile.length];
for (int i = 0; i < listFile.length; i++) {
JSONObject jObject = new JSONObject();
//Get the path image file
// FilePathStrings[i] = listFile[i].getAbsolutePath();
// Get the name image file
// FileNameStrings[i] = listFile[i].getName();
jObject.put("filepath", listFile[i].getAbsolutePath());
jObject.put("filename", listFile[i].getName());
jArrayFileData.put(jObject);
}
}
// Arrays.sort(listFile);
final ListAdapter listAdapter = new CustomAdapter(Yearbook.this, jArrayFileData);
ListView lv = (ListView) findViewById(R.id.ListingView);
lv.setAdapter(listAdapter);
// final ArrayList<String> list = new ArrayList(Arrays.asList(FilePathStrings));
lv.setOnItemClickListener(this);
lv.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
#Override
public boolean onItemLongClick(AdapterView<?> parent, View view, final int position, long id) {
//Deletes item
AlertDialog.Builder adb = new AlertDialog.Builder(Yearbook.this);
adb.setTitle("Delete?");
adb.setMessage("Are you sure you want to delete " + FileNameStrings[position]);
final int positionToRemove = position;
adb.setNegativeButton("Cancel", null);
adb.setPositiveButton("Ok", new AlertDialog.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
try {
File file = new File(list.get(positionToRemove));
if (file.delete()) {
Toast.makeText(getApplicationContext(), jArrayFileData.getJSONObject(position).optString("filename") + " deleted", Toast.LENGTH_LONG).show();
jArrayFileData.remove(position);
// list.remove(position);
((CustomAdapter) listAdapter).updateMyData(jArrayFileData);
}
} catch (JSONException e) {
}
}
});
adb.show();
return true;
}
});
}
Use Arraylist<String> for fpath and fname in your code: Then to delete data from your listview.
Use this:
fpath.remove(index_toDelete);
fpath.remove(index_toDelete);
customAdapter.notifyDataSetChanged();
My application is able to take pictures and to save and to show them in a list. They also can be deleted and the list is correctly updated.
However, if I close the application and then launch it again, the list is no more correct. In detail:
These are the list elements in the adapter after I take two pictures:
List[0] 20150603_042556
List[1] 20150603_042601
These pictures are correctly saved. However, if I close and open again the application, this is what happens:
Loaded selfie:﹕ 20150603_042556
List[0] 20150603_042556
Loaded selfie: 20150603_042601
List[0] 20150603_042601
List[1] 20150603_042601
This is the add function:
public void add(SelfieRecord listItem) {
list.add(listItem);
for(int k=0;k<list.size();k++)
Log.i("List: ", String.valueOf(k) + " " + list.get(k).getPicName());
notifyDataSetChanged();
}
This is how I load the saved pictures:
for (int ii = 0; ii < dirFiles.length; ii++) {
File file = dirFiles[ii];
String path = file.getAbsolutePath();
selfie.setPic(path);
selfie.setPicName(path.substring(path.indexOf("_") + 1, path.lastIndexOf("_")));
Log.i(TAG+" Loaded selfie: ",path);
mAdapter.add(selfie);
}
Can't figure out what happens.
EDIT: More code follows.
In the main activity:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// setup notifications
setNotifications();
mListView = (ListView)findViewById(R.id.selfieList);
mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(MainActivity.this, ViewActivity.class);
SelfieRecord record = (SelfieRecord) mAdapter.getItem(position);
intent.putExtra(SELFIE_KEY, record.getPic());
startActivity(intent);
}
});
mAdapter = new SelfieAdapter(getApplicationContext());
mListView.setAdapter(mAdapter);
// load selfies
if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()) && mAdapter.getCount()==0) {
// gets the files in the directory
File fileDirectory = new File(getExternalFilesDir(Environment.DIRECTORY_PICTURES).getAbsolutePath());
if (!fileDirectory.exists()) {
fileDirectory.mkdirs();
}
// lists all the files into an array
File[] dirFiles = fileDirectory.listFiles();
if (dirFiles.length != 0) {
SelfieRecord selfie = new SelfieRecord();
// loops through the array of files, outputing the name to console
for (int ii = 0; ii < dirFiles.length; ii++) {
File file = dirFiles[ii];
String path = file.getAbsolutePath();
selfie.setPic(path);
selfie.setPicName(path.substring(path.indexOf("_") + 1, path.lastIndexOf("_")));
Log.i(TAG+" Loaded selfie: ",path);
mAdapter.add(selfie);
}
}
}
registerForContextMenu(mListView);
}
In the Adapter:
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View newView = convertView;
ViewHolder holder;
SelfieRecord curr = list.get(position);
Log.i("List: ", String.valueOf(position)+" "+list.get(position).getPicName());
if (null == convertView) {
holder = new ViewHolder();
newView = inflater.inflate(R.layout.list_record, parent, false);
holder.pic = (ImageView) newView.findViewById(R.id.pic);
holder.name = (TextView) newView.findViewById(R.id.pic_name);
newView.setTag(holder);
} else {
holder = (ViewHolder) newView.getTag();
}
//setPic(holder.pic, curr.getPic());
holder.name.setText(curr.getPicName());
mImageView = holder.pic;
new BitmapLoader().execute(curr.getPic());
Log.i("Loader: ", String.valueOf(position) + " " + curr.getPicName());
return newView;
}
static class ViewHolder {
ImageView pic;
TextView name;
}
public void add(SelfieRecord listItem) {
list.add(listItem);
for(int k=0;k<list.size();k++)
Log.i("List: ", String.valueOf(k) + " " + list.get(k).getPicName());
notifyDataSetChanged();
}
public void remove(int position) {
list.remove(position);
notifyDataSetChanged();
}
Bitmap Loader:
public class BitmapLoader extends AsyncTask<String,Integer,Bitmap> {
#Override
protected Bitmap doInBackground(String... resId) {
// Get the dimensions of the View
int targetW = Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 160, mContext.getResources().getDisplayMetrics()));
int targetH = Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 120, mContext.getResources().getDisplayMetrics()));
// Get the dimensions of the bitmap
BitmapFactory.Options bmOptions = new BitmapFactory.Options();
bmOptions.inJustDecodeBounds = true;
BitmapFactory.decodeFile(resId[0], bmOptions);
int photoW = bmOptions.outWidth;
int photoH = bmOptions.outHeight;
// Determine how much to scale down the image
int scaleFactor = Math.min(photoW/targetW, photoH/targetH);
// Decode the image file into a Bitmap sized to fill the View
bmOptions.inJustDecodeBounds = false;
bmOptions.inSampleSize = scaleFactor;
bmOptions.inPurgeable = true;
Bitmap bitmap = BitmapFactory.decodeFile(resId[0], bmOptions);
return bitmap;
}
#Override
protected void onPostExecute(Bitmap result) {
mImageView.setImageBitmap(result);
}
}
I believe the problem is when I put the elements in the adapter after recovered them from storage:
Loaded selfie:﹕ 20150603_042556
List[0] 20150603_042556
Loaded selfie: 20150603_042601
List[0] 20150603_042601
List[1] 20150603_042601
The second call to the adapter's add method overwrite the first element. Why?
Solved by changing the for loop in on Create:
if (dirFiles.length != 0) {
// loops through the array of files, outputing the name to console
for (int ii = 0; ii < dirFiles.length; ii++) {
File file = dirFiles[ii];
String path = file.getAbsolutePath();
SelfieRecord selfie = new SelfieRecord();
selfie.setPic(path);
selfie.setPicName(path.substring(path.indexOf("_") + 1, path.lastIndexOf("_")));
Log.i(TAG+" Loaded selfie: ",path);
mAdapter.add(selfie);
}
}
Must pass a different SelfieRecord Object to the add method.
i have create an app in which i am reading the files from phone memory it can read any of the file but when i am reading .vcf file.but when it is smaller than 1 mb ,give correct result,if it is greater than 1 mb,it return nothing.how can i read the data from file.please suggest something.
File_Explore
public class File_Explorer extends Activity {
// Stores names of traversed directories
ArrayList<String> str = new ArrayList<String>();
// Check if the first level of the directory structure is the one showing
private Boolean firstLvl = true;
String aDataRow = "";
static StringBuilder aBuffer = new StringBuilder();
String aBuffer1="";
private static final String TAG = "F_PATH";
private Item[] fileList;
private File path = new File(Environment.getExternalStorageDirectory().getAbsolutePath());
private String chosenFile;
private static final int DIALOG_LOAD_FILE = 0;
static String fileExtension="";
ListAdapter adapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
loadFileList();
showDialog(DIALOG_LOAD_FILE);
Log.d(TAG, path.getAbsolutePath());
}
private void loadFileList() {
try {
path.mkdirs();
} catch (SecurityException e) {
Log.e(TAG, "unable to write on the sd card ");
}
// Checks whether path exists
if (path.exists()) {
FilenameFilter filter = new FilenameFilter() {
#Override
public boolean accept(File dir, String filename) {
File sel = new File(dir, filename);
// Filters based on whether the file is hidden or not
return (sel.isFile() || sel.isDirectory())
&& !sel.isHidden();
}
};
String[] fList = path.list(filter);
fileList = new Item[fList.length];
for (int i = 0; i < fList.length; i++) {
fileList[i] = new Item(fList[i], R.drawable.ic_launcher);
// Convert into file path
File sel = new File(path, fList[i]);
// Set drawables
if (sel.isDirectory()) {
fileList[i].icon = R.drawable.ic_launcher;
Log.d("DIRECTORY", fileList[i].file);
} else {
Log.d("FILE", fileList[i].file);
}
}
if (!firstLvl) {
Item temp[] = new Item[fileList.length + 1];
for (int i = 0; i < fileList.length; i++) {
temp[i + 1] = fileList[i];
}
temp[0] = new Item("Back", R.drawable.ic_launcher);
fileList = temp;
}
} else {
Log.e(TAG, "path does not exist");
}
adapter = new ArrayAdapter<Item>(this,
android.R.layout.select_dialog_item, android.R.id.text1,
fileList) {
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// creates view
View view = super.getView(position, convertView, parent);
TextView textView = (TextView) view
.findViewById(android.R.id.text1);
// put the image on the text view
textView.setCompoundDrawablePadding(
fileList[position].icon);
return view;
}
};
}
private class Item {
public String file;
public int icon;
public Item(String file, Integer icon) {
this.file = file;
this.icon = icon;
}
#Override
public String toString() {
return file;
}
}
#Override
protected Dialog onCreateDialog(int id) {
Dialog dialog = null;
AlertDialog.Builder builder = new Builder(this);
if (fileList == null) {
Log.e(TAG, "No files loaded");
dialog = builder.create();
return dialog;
}
switch (id) {
case DIALOG_LOAD_FILE:
builder.setTitle("Choose your file");
builder.setAdapter(adapter, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
chosenFile = fileList[which].file;
File sel = new File(path + "/" + chosenFile);
if (sel.isDirectory()) {
firstLvl = false;
// Adds chosen directory to list
str.add(chosenFile);
fileList = null;
path = new File(sel + "");
loadFileList();
removeDialog(DIALOG_LOAD_FILE);
showDialog(DIALOG_LOAD_FILE);
Log.d(TAG, path.getAbsolutePath());
}
// Checks if 'up' was clicked
else if (chosenFile.equalsIgnoreCase("Back") && !sel.exists()) {
// present directory removed from list
String s = str.remove(str.size() - 1);
// path modified to exclude present directory
path = new File(path.toString().substring(0,
path.toString().lastIndexOf(s)));
fileList = null;
// if there are no more directories in the list, then
// its the first level
if (str.isEmpty()) {
firstLvl = true;
}
loadFileList();
removeDialog(DIALOG_LOAD_FILE);
showDialog(DIALOG_LOAD_FILE);
Log.d(TAG, path.getAbsolutePath());
}
// File picked
else {
// Perform action with file picked
fileExtension
= MimeTypeMap.getFileExtensionFromUrl(sel.toString());
// Toast.makeText(getApplication(), fileExtension, Toast.LENGTH_LONG).show();
try{
// ArrayList<String> MyFiles = new ArrayList<String>();
FileInputStream fIn = new FileInputStream(sel);
BufferedReader myReader = new BufferedReader(
new InputStreamReader(fIn));
while ((aDataRow = myReader.readLine()) != null) {
aBuffer.append(aDataRow.toString()).append("\n");
}
// aBuffer1 = aBuffer.toString();
myReader.close();
}catch (FileNotFoundException e)
{e.printStackTrace();}
catch (IOException e) {
e.printStackTrace();
}
// Toast.makeText(getApplicationContext(),aBuffer,Toast.LENGTH_LONG).show();
Intent returnIntent = new Intent();
returnIntent.putExtra("name", aBuffer.toString());
setResult(RESULT_OK, returnIntent);
finish();
}
aBuffer.delete(0, aBuffer.length());
// aBuffer1=null;
}
}
);
break;
}
dialog = builder.show();
return dialog;
}
#Override
public void onBackPressed() {
// TODO Auto-generated method stub
super.onBackPressed();
Intent i= new Intent(this, File_Selecter.class);
startActivity(i);
}
}
If you do not need whole 1MB (capital B by the way) read (which is usually the case), then read only the part you need. And if you do not know where the part you need is (so you cannot seek()), read in smaller chunks unless you find what you need to read from the file.
I'm trying to emplement a file explorer with sliding pane interface. But when i scroll the grid view i have my genymotion device display like (http://www.mediafire.com/?kui3x2l7u6ykgx3)
and this is when the app first start (http://www.mediafire.com/?45cg12uk5wadiui)
could any one tell me where shouls i look up or how to fix this?
The images are in the link, sorry for this because i don't have enough reputation to attract image in my post.
and here is my code
this is the fragment which content the gridview
public class ContentFragment extends Fragment{
public static ArrayList<FileItem> listFileItem = new ArrayList<FileItem>();
public static FileGridAdapter fileGridAdapter = null;
public static int clickTimes = 0;
ArrayList<String> str = new ArrayList<String>();
private Boolean firstLvl = true;
private File path = new File(Environment.getExternalStorageDirectory() + "");
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
loadFiles();
View rootView = inflater.inflate(R.layout.fragment_content, container, false);
fileGridAdapter = new FileGridAdapter(getActivity(), android.R.layout.activity_list_item, listFileItem);
GridView gridView = (GridView) rootView.findViewById(R.id.fileGridView);
gridView.setAdapter(fileGridAdapter);
gridView.setOnItemClickListener( new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
FileItem fileItem = fileGridAdapter.getItem(arg2);
if(fileItem.fileIcon == "folder") {
if(fileItem.fileName == "up") {
path = new File(path.toString().substring(0,
path.toString().lastIndexOf("/")));
if(path.toString() == (new File(Environment.getExternalStorageDirectory() + "")).toString())
firstLvl = true;
} else {
File selectedFolder = new File(path + "/" + fileItem.fileName);
path = new File(selectedFolder + "");
firstLvl = false;
}
loadFiles();
fileGridAdapter.notifyDataSetChanged();
} else {
FileGridItem fileGridItem = (FileGridItem) arg1;
fileGridItem.checkBox.setChecked(true);
}
}
});
return rootView;
}
private void loadFiles() {
listFileItem.clear();
try {
path.mkdirs();
} catch (SecurityException e) {
}
if (path.exists()) {
FilenameFilter filter = new FilenameFilter() {
#Override
public boolean accept(File dir, String filename) {
File sel = new File(dir, filename);
// Filters based on whether the file is hidden or not
return (sel.isFile() || sel.isDirectory())
&& !sel.isHidden();
}
};
String[] fList = path.list(filter);
listFileItem = new ArrayList<FileItem>();
for (int i = 0; i < fList.length; i++) {
listFileItem.add(new FileItem(fList[i], path.getPath()));
}
if (!firstLvl) {
listFileItem.add(new FileItem("up", path.getPath()));
}
} else {
}
}
}