androidimageviewandroid-custom-viewcustom-adapterandroid-viewholder
CustomAdapter is not displaying ArrayList Item: ImageView
In my CheckOutMemo.class I can set any title and content as shown in picture.
MainActivity.class then retrieves this title and content without any problems and displays a custom row. Like in this picture:
Title = Header
Content = bodyText
But the problem is: When I take a picture - I can't display it on my custom row. (That little dog in my MainActivity is there by default). I don't know what the problem is.
I can preview my captured image as an Bitmap in my CheckOutMemo.class's contentView. I can successfully save it to my External Storage. But I can't display it on my MainActivity.
MAINACTIVITY.CLASS
public class MainActivity extends AppCompatActivity implements AdapterView.OnItemLongClickListener, AdapterView.OnItemClickListener {
public ImageView view;
private String[] mPermission = {Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA};
private static final int REQUEST_CODE_PERMISSION = 5;
CustomAdapter customAdapter;
ListView listView;
Intent intent;
final Context context = this;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
customAdapter = new CustomAdapter();
listView = (ListView) findViewById(R.id.myListView);
listView.setAdapter(customAdapter);
listView.setOnItemLongClickListener(this);
listView.setOnItemClickListener(this);
view = (ImageView) this.findViewById(R.id.imageIcon);
if (ActivityCompat.checkSelfPermission(MainActivity.this, mPermission[0])
!= MockPackageManager.PERMISSION_GRANTED ||
ActivityCompat.checkSelfPermission(MainActivity.this, mPermission[1])
!= MockPackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this,
mPermission, REQUEST_CODE_PERMISSION);
}
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Memo memo = customAdapter.getItem(position);
intent = new Intent(getApplicationContext(), CheckOutMemo.class);
intent.putExtra("header", memo.header);
intent.putExtra("bodyText", memo.bodyText);
intent.putExtra("position", position);
// launches edit request and saving existing item.
startActivityForResult(intent, CheckOutMemo.EDIT_REQUEST_CODE);
}
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view, final int position, long id) {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);
alertDialogBuilder.setTitle("Confirm Delete");
alertDialogBuilder.setMessage("Delete memo?");
alertDialogBuilder.setCancelable(false);
alertDialogBuilder.setPositiveButton("Delete", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
customAdapter.delete(position);
customAdapter.notifyDataSetChanged();
}
});
alertDialogBuilder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.cancel();
}
});
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
return true;
}
public void addNewNote(View view) {
Intent intent = new Intent(getApplicationContext(), CheckOutMemo.class);
//Adding new listItem to the ArrayList.
startActivityForResult(intent, CheckOutMemo.ADD_REQUEST_CODE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode != Activity.RESULT_OK) {
return;
}
if (requestCode == CheckOutMemo.ADD_REQUEST_CODE) {
String header = data.getStringExtra("header");
String bodyText = data.getStringExtra("bodyText");
if (getIntent().hasExtra("byteArray")) {
Bitmap bitmap = BitmapFactory.decodeByteArray(
getIntent().getByteArrayExtra("byteArray"), 0, getIntent().getByteArrayExtra("byteArray").length);
view.setImageBitmap(bitmap);
}
Memo memo = new Memo(header, bodyText, view);
customAdapter.add(memo);
customAdapter.notifyDataSetChanged();
}
if (requestCode == CheckOutMemo.EDIT_REQUEST_CODE) {
int position = data.getIntExtra("position", 0);
Memo memo = customAdapter.getItem(position);
memo.header = data.getStringExtra("header");
memo.bodyText = data.getStringExtra("bodyText");
customAdapter.notifyDataSetChanged();
}
}
}
CHECKOUTMEMO.CLASS
public class CheckOutMemo extends AppCompatActivity {
public static final int ADD_REQUEST_CODE = 1;
public static final int EDIT_REQUEST_CODE = 2;
public static final int REQUEST_IMAGE_CAPTURE = 1337;
public String fileName;
public Bitmap bitmap;
private int position;
EditText editableTitle;
EditText editableContent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_detail);
Intent intent = getIntent();
editableTitle = (EditText) findViewById(R.id.editHeader);
editableContent = (EditText) findViewById(R.id.editBodyText);
editableTitle.setText(intent.getStringExtra("header"));
editableContent.setText(intent.getStringExtra("bodyText"));
checkIfUserChangedOrWroteAnyText();
//Declaring keyword and default position.
position = intent.getIntExtra("position", 0);
}
public void capturePhoto(View view) {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// Ensure that there's a camera activity to handle the intent
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
// Create the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
// Error occurred while creating the File
}
// Continue only if the File was successfully created
if (photoFile != null) {
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(photoFile));
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data){
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
try {
loadImageFromFile();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public void loadImageFromFile() throws IOException {
ImageView view = (ImageView)this.findViewById(R.id.primeImage);
view.setVisibility(View.VISIBLE);
int targetW = view.getWidth();
int targetH = view.getHeight();
// Get the dimensions of the bitmap
BitmapFactory.Options bmOptions = new BitmapFactory.Options();
bmOptions.inJustDecodeBounds = true;
BitmapFactory.decodeFile(fileName, 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;
bitmap = BitmapFactory.decodeFile(fileName, bmOptions);
view.setImageBitmap(bitmap);
}
public void createImageFromBitmap(){
if(bitmap!=null) {
Intent i = new Intent(this, MainActivity.class);
ByteArrayOutputStream bs = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 20, bs);
i.putExtra("byteArray", bs.toByteArray());
startActivity(i);
} else {
Toast.makeText(CheckOutMemo.this, "Bitmap is null", Toast.LENGTH_SHORT).show();
}
}
public void onSaveClick(View view){
String editableContentString = editableContent.getText().toString();
String editableTitleString = editableTitle.getText().toString();
if(TextUtils.isEmpty(editableContentString) && TextUtils.isEmpty(editableTitleString)) {
finish();
Toast.makeText(CheckOutMemo.this, "No content to save, note discarded", Toast.LENGTH_SHORT).show();
}
else {
if ((TextUtils.isEmpty(editableTitleString))) {
editableTitleString.equals(editableContentString);
Intent intent = new Intent();
createImageFromBitmap();
intent.putExtra("header", editableContent.getText().toString());
intent.putExtra("position", position);
//Sending userInput back to MainActivity.
setResult(Activity.RESULT_OK, intent);
finish();
} else {
Intent intent = new Intent();
createImageFromBitmap();
intent.putExtra("header", editableTitle.getText().toString());
intent.putExtra("bodyText", editableContent.getText().toString());
intent.putExtra("position", position);
//Sending userInput back to MainActivity.
setResult(Activity.RESULT_OK, intent);
finish();
}
}
}
public void cancelButtonClickedAfterEdit() {
Button button = (Button) findViewById(R.id.bigCancelButton);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(final View v) {
openDialogFragment(v);
}
});
}
public File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
String folder_main = "DNote";
String path = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES).toString() + File.separator + folder_main;
File storageDir = new File(path);
if (!storageDir.exists()) {
storageDir.mkdir();
}
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
fileName = image.getAbsolutePath();
MediaScannerConnection.scanFile(getApplicationContext(), new String[]{image.getPath()}, null,
new MediaScannerConnection.OnScanCompletedListener() {
@Override
public void onScanCompleted(String path, Uri uri) {
// Log.i(TAG, "Scanned " + path);
}
});
return image;
}
@Override
public void onBackPressed() {
openDialogFragment(null);
}
public void onCancelClick(View view){
finish();
}
}
CUSTOMADAPTER.CLASS
public class CustomAdapter extends BaseAdapter {
ArrayList<Memo> memos = new ArrayList<>();
public void add(Memo memo) {
this.memos.add(memo);
}
public void delete(int position) {
memos.remove(position);
}
@Override
public Memo getItem(int position) {
return memos.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public int getCount() {
return memos.size();
}
class MyViewHolder {
public TextView header, bodyText;
public ImageView imageView;
public MyViewHolder(View view) {
header = (TextView) view.findViewById(R.id.header);
bodyText = (TextView) view.findViewById(R.id.bodyText);
imageView = (ImageView) view.findViewById(R.id.primeImage);
}
}
@Override
public View getView(final int position, View convertView, ViewGroup parent){
MyViewHolder viewHolder;
if(null == convertView){
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
convertView = inflater.inflate(R.layout.custom_row, parent, false);
viewHolder = new MyViewHolder(convertView);
viewHolder.header.setTag(position);
convertView.setTag(viewHolder);
}
else{
viewHolder = (MyViewHolder) convertView.getTag();
}
Memo memo = getItem(position);
viewHolder.header.setText(memo.header);
viewHolder.bodyText.setText(memo.bodyText);
CheckOutMemo checkOutMemo = new CheckOutMemo();;
if(checkOutMemo.bitmap!=null) {
viewHolder.imageView.setImageBitmap(checkOutMemo.bitmap);
}
return convertView;
}
}
MEMO.CLASS
public class Memo {
public String header, bodyText;
public ImageView imageView;
public Memo(String header, String bodyText, ImageView imageView){
this.header = header;
this.bodyText = bodyText;
this.imageView = imageView;
}
}
I've been working on this for over 2 months every day. Any help would be appreciated!!
Solution
Ok here is the minimal viable solution to get what you want. I just fixed it enough so an image is returned to your main activity. The rest of your issues are for you to fix. The only class I haven't touched is your Memo class. But that being said I highly recommend you update it to store a String with the path to the image instead of an ImageView.
But if for you what you want to do here are your files edited to work:
First custom adapter:
I've changed the lines where you get the image from memo, to check it's image view for a bitmap drawable and transfer that bitmap to the row's image view. There was no need to instantiate that CheckoutMemo activity here.
public class CustomAdapter extends BaseAdapter {
ArrayList<Memo> memos = new ArrayList<>();
public void add(Memo memo) {
this.memos.add(memo);
}
public void delete(int position) {
memos.remove(position);
}
@Override
public Memo getItem(int position) {
return memos.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public int getCount() {
return memos.size();
}
class MyViewHolder {
public TextView header, bodyText;
public ImageView imageView;
public MyViewHolder(View view) {
header = (TextView) view.findViewById(R.id.header);
bodyText = (TextView) view.findViewById(R.id.bodyText);
imageView = (ImageView) view.findViewById(R.id.primeImage);
}
}
@Override
public View getView(final int position, View convertView, ViewGroup parent){
MyViewHolder viewHolder;
if(null == convertView){
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
convertView = inflater.inflate(R.layout.custom_row, parent, false);
viewHolder = new MyViewHolder(convertView);
viewHolder.header.setTag(position);
convertView.setTag(viewHolder);
}
else{
viewHolder = (MyViewHolder) convertView.getTag();
}
Memo memo = getItem(position);
viewHolder.header.setText(memo.header);
viewHolder.bodyText.setText(memo.bodyText);
if (memo.imageView.getDrawable() instanceof BitmapDrawable) {
BitmapDrawable bitmapDrawable = (BitmapDrawable) memo.imageView.getDrawable();
viewHolder.imageView.setImageBitmap(bitmapDrawable.getBitmap());
}
return convertView;
}
}
Next your CheckoutMemo:
I've changed how your setResult methods work. I've also deleted the method createImageFromBitmap. It was problematic, and also caused confusion. That one was a doozy. The createImageFromBitmap method was creating another MainActivity... confused me for a bit why onActivityResult wasn't being called. It wasn't being called because you were creating another activity =/
Anyways in your intent you create with your results, you'll notice I am also adding the file path string to the image created. So that main activity can use it to get the image!
public class CheckOutMemo extends AppCompatActivity {
public static final int ADD_REQUEST_CODE = 1;
public static final int EDIT_REQUEST_CODE = 2;
public static final int REQUEST_IMAGE_CAPTURE = 1337;
public String fileName;
public Bitmap bitmap;
private int position;
EditText editableTitle;
EditText editableContent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_detail);
Intent intent = getIntent();
editableTitle = (EditText) findViewById(R.id.editHeader);
editableContent = (EditText) findViewById(R.id.editBodyText);
editableTitle.setText(intent.getStringExtra("header"));
editableContent.setText(intent.getStringExtra("bodyText"));
//checkIfUserChangedOrWroteAnyText();
//Declaring keyword and default position.
position = intent.getIntExtra("position", 0);
}
public void capturePhoto(View view) {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// Ensure that there's a camera activity to handle the intent
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
// Create the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
// Error occurred while creating the File
}
// Continue only if the File was successfully created
if (photoFile != null) {
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(photoFile));
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data){
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
try {
loadImageFromFile();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public void loadImageFromFile() throws IOException {
ImageView view = (ImageView)this.findViewById(R.id.primeImage);
view.setVisibility(View.VISIBLE);
int targetW = view.getWidth();
int targetH = view.getHeight();
// Get the dimensions of the bitmap
BitmapFactory.Options bmOptions = new BitmapFactory.Options();
bmOptions.inJustDecodeBounds = true;
BitmapFactory.decodeFile(fileName, 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;
bitmap = BitmapFactory.decodeFile(fileName, bmOptions);
view.setImageBitmap(bitmap);
}
public void onSaveClick(View view){
String editableContentString = editableContent.getText().toString();
String editableTitleString = editableTitle.getText().toString();
if(TextUtils.isEmpty(editableContentString) && TextUtils.isEmpty(editableTitleString)) {
finish();
Toast.makeText(CheckOutMemo.this, "No content to save, note discarded", Toast.LENGTH_SHORT).show();
}
else {
if ((TextUtils.isEmpty(editableTitleString))) {
editableTitleString.equals(editableContentString);
Intent intent = new Intent();
//createImageFromBitmap();
intent.putExtra("header", editableContent.getText().toString());
intent.putExtra("position", position);
intent.putExtra("photo", fileName);
//Sending userInput back to MainActivity.
setResult(AppCompatActivity.RESULT_OK, intent);
finish();
} else {
Intent intent = new Intent();
//createImageFromBitmap();
intent.putExtra("header", editableTitle.getText().toString());
intent.putExtra("bodyText", editableContent.getText().toString());
intent.putExtra("photo", fileName);
intent.putExtra("position", position);
//Sending userInput back to MainActivity.
setResult(AppCompatActivity.RESULT_OK, intent);
finish();
}
}
}
public void cancelButtonClickedAfterEdit() {
Button button = (Button) findViewById(R.id.bigCancelButton);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(final View v) {
//openDialogFragment(v);
}
});
}
public File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
String folder_main = "DNote";
String path = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES).toString() + File.separator + folder_main;
File storageDir = new File(path);
if (!storageDir.exists()) {
storageDir.mkdir();
}
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
fileName = image.getAbsolutePath();
MediaScannerConnection.scanFile(getApplicationContext(), new String[]{image.getPath()}, null,
new MediaScannerConnection.OnScanCompletedListener() {
@Override
public void onScanCompleted(String path, Uri uri) {
// Log.i(TAG, "Scanned " + path);
}
});
return image;
}
@Override
public void onBackPressed() {
//openDialogFragment(null);
}
public void onCancelClick(View view){
finish();
}
}
Finally your MainActivity:
In on activity result if the photo path exists. Then I am adding it to the memo object's image view to later be retrieved by the adapters ImageView. This can be upgraded a bit hence my comments above to be a little less convoluted by just passing the file path ;)
public class MainActivity extends AppCompatActivity implements AdapterView.OnItemLongClickListener,
AdapterView.OnItemClickListener {
public ImageView view;
private String[] mPermission = {Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA};
private static final int REQUEST_CODE_PERMISSION = 5;
CustomAdapter customAdapter;
ListView listView;
Intent intent;
final Context context = this;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
customAdapter = new CustomAdapter();
listView = (ListView) findViewById(R.id.myListView);
listView.setAdapter(customAdapter);
listView.setOnItemLongClickListener(this);
listView.setOnItemClickListener(this);
//view = (ImageView) this.findViewById(R.id.imageIcon);
if (ActivityCompat.checkSelfPermission(MainActivity.this, mPermission[0])
!= MockPackageManager.PERMISSION_GRANTED ||
ActivityCompat.checkSelfPermission(MainActivity.this, mPermission[1])
!= MockPackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this,
mPermission, REQUEST_CODE_PERMISSION);
}
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Memo memo = customAdapter.getItem(position);
intent = new Intent(getApplicationContext(), CheckOutMemo.class);
intent.putExtra("header", memo.header);
intent.putExtra("bodyText", memo.bodyText);
intent.putExtra("position", position);
// launches edit request and saving existing item.
startActivityForResult(intent, CheckOutMemo.EDIT_REQUEST_CODE);
}
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view, final int position, long id) {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);
alertDialogBuilder.setTitle("Confirm Delete");
alertDialogBuilder.setMessage("Delete memo?");
alertDialogBuilder.setCancelable(false);
alertDialogBuilder.setPositiveButton("Delete", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
customAdapter.delete(position);
customAdapter.notifyDataSetChanged();
}
});
alertDialogBuilder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.cancel();
}
});
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
return true;
}
public void addNewNote(View view) {
Intent intent = new Intent(getApplicationContext(), CheckOutMemo.class);
//Adding new listItem to the ArrayList.
startActivityForResult(intent, CheckOutMemo.ADD_REQUEST_CODE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode != Activity.RESULT_OK) {
return;
}
if (requestCode == CheckOutMemo.ADD_REQUEST_CODE) {
String header = data.getStringExtra("header");
String bodyText = data.getStringExtra("bodyText");
File photo = new File(data.getStringExtra("photo"));
ImageView view = new ImageView(this);
if (photo.exists()) {
Bitmap myBitmap = BitmapFactory.decodeFile(photo.getAbsolutePath());
view.setImageBitmap(myBitmap);
}
Memo memo = new Memo(header, bodyText, view);
customAdapter.add(memo);
customAdapter.notifyDataSetChanged();
}
if (requestCode == CheckOutMemo.EDIT_REQUEST_CODE) {
int position = data.getIntExtra("position", 0);
Memo memo = customAdapter.getItem(position);
memo.header = data.getStringExtra("header");
memo.bodyText = data.getStringExtra("bodyText");
File photo = new File(data.getStringExtra("photo"));
if (photo.exists()) {
Bitmap myBitmap = BitmapFactory.decodeFile(photo.getAbsolutePath());
memo.imageView.setImageBitmap(myBitmap);
}
customAdapter.notifyDataSetChanged();
}
}
}
All in all, running this I can now see images in the notes created!
Keep at your project here. Two months is a good commitment. You are doing great, keep up the good work. There are more things you can improve in there! Just keep massaging it, and never give up.
You rock =)
I can get you the working project I've created to test this if needed.
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