How About onActivityResult when I want to read multiple file from storage - image

How About onActivityResult when I want to read multiple file form storage
In this xml form I have to take multiple image file by clicking different different button from the app external storage but their is a difficulties on ActivityResult override method calling , because it call automatically and can't be call multiple time for for different different button
It's working fine for single file picking and get image URI.
So how can I fix the ActivityResult override method for different different button in a single activity
public class Application_Form extends AppCompatActivity {
ActivityApplicationBinding binding;
boolean isOnlyImageAllowed = true;
private static final int PICK_PHOTO = 1958;
private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static String[] PERMISSIONS_STORAGE = {
Manifest.permission.WRITE_EXTERNAL_STORAGE
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
binding = ActivityApplicationBinding.inflate(getLayoutInflater());
View view = binding.getRoot();
setContentView(view);
//check user storage permission
int permission = ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE);
if (permission != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(
this,
PERMISSIONS_STORAGE,
REQUEST_EXTERNAL_STORAGE
);
}
binding.form4.choosePropertyFile.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent;
if (isOnlyImageAllowed) {
// only image can be selected
intent = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
} else {
// any type of files including image can be selected
intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("file/*");
}
startActivityForResult(intent, PICK_PHOTO);
}
});
}
#Override
protected void onActivityResult(int requestCode, int resultCode, #Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK && requestCode == PICK_PHOTO) {
Uri imageUri = data.getData();
binding.form4.selectedPropertyFile.setText("" + imageUri.getLastPathSegment());
}
}
}

Taking a array to pick photo then check with if else statement by array index
public class Application_Form extends AppCompatActivity {
ActivityApplicationBinding binding;
boolean isOnlyImageAllowed = true;
private static int[] PICK_PHOTO={0,1,2,3,4,5} ;
private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static String[] PERMISSIONS_STORAGE = {
Manifest.permission.WRITE_EXTERNAL_STORAGE
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
binding = ActivityApplicationBinding.inflate(getLayoutInflater());
View view = binding.getRoot();
setContentView(view);
binding.appBar.title.setText("লাইসেন্সের জন্য আবেদন করুন");
binding.appBar.back.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
onBackPressed();
}
});
//check user storage permission
int permission = ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE);
if (permission != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(
this,
PERMISSIONS_STORAGE,
REQUEST_EXTERNAL_STORAGE
);
}
binding.form4.choosePropertyFile.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent;
if (isOnlyImageAllowed) {
// only image can be selected
intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
} else {
// any type of files including image can be selected
intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("file/*");
}
startActivityForResult(intent, 0);
}
});
binding.form4.chooseBankCertificate.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent;
if (isOnlyImageAllowed) {
// only image can be selected
intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
} else {
// any type of files including image can be selected
intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("file/*");
}
startActivityForResult(intent, 1);
}
});
}
#Override
protected void onActivityResult(int requestCode, int resultCode, #Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK && requestCode == PICK_PHOTO[0]) {
Uri imageUri = data.getData();
binding.form4.selectedPropertyFile.setText("" + imageUri.getLastPathSegment());
}
if (resultCode == RESULT_OK && requestCode == PICK_PHOTO[1]) {
Uri imageUri = data.getData();
binding.form4.selectedBankCertificate.setText("" + imageUri.getLastPathSegment());
}
}
}

Related

CountDownTimer behaves weird/different the second time i open its Activity

I have been spending way too many hours on this one. And i just dont get it.
What i want: I have a main Activity (lets call it 'Activity Main') from which i am calling a second Activity ('Activity Timer') that has a CountDownTimer. Upon starting "Activity Timer" i want a Countdown to start running; it is only supposed to play a sound when it finishes. There is also a 'Pause-Button' which pauses/resumes the Countdown. 'Activity Timer' sends back results to 'Activity Main' via Intent when a button is pressed (either 'Success' or 'Fail' - well, it's a game). I am back at 'Activity Main' and all just worked perfectly fine.
That is until i start 'Activity Timer' a second time (for the secound round): The Countdown starts but cannot be paused. It just keeps ticking, even though i cancel() the Countdown and finish() the 'Activity Timer'.
Here's the code:
Activity Timer
public class GameActivity extends AppCompatActivity {
long countdown_time;
Button button_fail, button_success;
ImageButton imgbtn_pause;
boolean cd_running = false;
boolean countdown_auto = true;
TextView textView_countdown;
private static CountDownTimer;
Vibrator vibrator;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.game_activity);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
// Preferences
prefs = getSharedPreferences("shared_preferences", Context.MODE_PRIVATE);
// Intent
Intent i = getIntent();
countdown_time = i.getLongExtra("countdown_time", 60000);
// Assigning
button_fail = (Button) findViewById(R.id.btn_fail);
button_success = (Button) findViewById(R.id.btn_success);
textView_countdown = (TextView) findViewById(R.id.tv_countdown);
imgbtn_pause = (ImageButton) findViewById(R.id.imgbtn_pause);
button_fail.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (cd_running) {
countdown.cancel();
}
cd_running = false;
countdown = null;
Intent returnIntent = new Intent();
if (risk) {
returnIntent.putExtra("result", "-3");
} else {
returnIntent.putExtra("result", "0");
}
setResult(Activity.RESULT_OK, returnIntent);
finish();
}
});
button_success.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (cd_running) {
countdown.cancel();
}
cd_running = false;
countdown = null;
Intent returnIntent = new Intent();
setResult(Activity.RESULT_OK, returnIntent);
finish();
}
});
imgbtn_pause.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (cd_running) {
countdown.cancel();
cd_running = false;
imgbtn_pause.setBackgroundResource(R.drawable.play_2);
} else {
startCountDownTimer();
imgbtn_risk.setVisibility(View.INVISIBLE);
imgbtn_pause.setBackgroundResource(R.drawable.pause_2);
}
}
});
private void startCountDownTimer() {
cd_running = true;
imgbtn_pause.setBackgroundResource(R.drawable.pause_2);
countdown = new CountDownTimer(countdown_time, 1000) {
public void onTick(long millisUntilFinished) {
countdown_time = millisUntilFinished;
textView_countdown.setText("" + millisUntilFinished / 1000);
}
public void onFinish() {
countdown.cancel();
countdown = null;
cd_running = false;
if (!mute) {
vibrator = (Vibrator) GameActivity.this.getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(1000);
countdown_sound.start();
}
textView_countdown.setVisibility(View.INVISIBLE);
textView_gameOver.setVisibility(View.VISIBLE);
imgbtn_pause.setVisibility(View.INVISIBLE);
}
}.start();
}
The call from 'Activity Main':
#Override
public void onClick(View view) {
Intent i = new Intent(GameMenu.this, GameActivity.class);
i.putExtra("countdown_time", countdown_time);
startActivityForResult(i, 1);
}
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1) {
if (resultCode == Activity.RESULT_OK) {
String result_string = data.getStringExtra("result");
int result_int = Integer.parseInt(data.getStringExtra("result"));
}
if (resultCode == Activity.RESULT_CANCELED) {
// No result
}
}

Best approach to use DiffUtil with LIveData + Room Database?

I am using Room Database with LiveData , but my Local Database is updating too fast as per our requirement and at the same time i have to reload my recycler view .instead of calling notifyDataSetChanged() to adapter , i am trying to use DiffUtil , but is crashing or not reloading properly , this is uncertain .
i am following this tutorial :
Tutorials Link here
MyAdapter :
public class SwitchGridAdapter extends RecyclerView.Adapter<SwitchGridAdapter.ViewHolder> {
private List<Object> allItemsList;
private LayoutInflater mInflater;
private OnItemClickListener mClickListener;
private Context context;
private Queue<List<Object>> pendingUpdates =
new ArrayDeque<>();
// data is passed into the constructor
public SwitchGridAdapter(Context context,List<Appliance> applianceList,List<ZmoteRemote> zmoteRemoteList) {
this.mInflater = LayoutInflater.from(context);
this.context = context;
allItemsList = new ArrayList<>();
if (applianceList!=null) allItemsList.addAll(applianceList);
if (zmoteRemoteList!=null)allItemsList.addAll(zmoteRemoteList);
}
// inflates the cell layout from xml when needed
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = mInflater.inflate(R .layout.switch_grid_item, parent, false);
return new ViewHolder(view);
}
// binds the data to the textview in each cell
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
// Doing some update with UI Elements
}
// total number of cells
#Override
public int getItemCount() {
return allItemsList.size();
}
// stores and recycles views as they are scrolled off screen
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener,View.OnLongClickListener {
TextView myTextView;
ImageView imgSwitch;
ViewHolder(View itemView) {
super(itemView);
myTextView = (TextView) itemView.findViewById(R.id.txtSwitchName);
imgSwitch = (ImageView) itemView.findViewById(R.id.imgSwitchStatus);
itemView.setOnClickListener(this);
itemView.setOnLongClickListener(this);
}
#Override
public void onClick(View view) {
// handling click
}
#Override
public boolean onLongClick(View view) {
return true;
}
// convenience method for getting data at click position
Object getItem(int id) {
return allItemsList.get(id);
}
// allows clicks events to be caught
public void setClickListener(OnItemClickListener itemClickListener) {
this.mClickListener = itemClickListener;
}
// parent activity will implement this method to respond to click events
public interface OnItemClickListener {
void onItemClick(View view, int position);
void onItemLongPressListner(View view, int position);
}
// ✅✅✅✅✅✅✅✅✅✅✅✅✅✅✅✅✅✅✅✅✅
// From This Line Reloading with Diff Util is Done .
//✅✅✅✅✅✅✅✅✅✅✅✅✅✅✅✅✅✅✅✅✅
public void setApplianceList( List<Appliance> applianceList,List<ZmoteRemote> zmoteRemoteList)
{
if (allItemsList == null)
allItemsList = new ArrayList<>();
List<Object> newAppliances = new ArrayList<>();
if (applianceList!=null) newAppliances.addAll(applianceList);
updateItems(newAppliances);
}
// when new data becomes available
public void updateItems(final List<Object> newItems) {
pendingUpdates.add(newItems);
if (pendingUpdates.size() > 1) {
return;
}
updateItemsInternal(newItems);
}
// This method does the heavy lifting of
// pushing the work to the background thread
void updateItemsInternal(final List<Object> newItems) {
final List<Object> oldItems = new ArrayList<>(this.allItemsList);
final Handler handler = new Handler();
new Thread(new Runnable() {
#Override
public void run() {
final DiffUtil.DiffResult diffResult =
DiffUtil.calculateDiff(new DiffUtilHelper(oldItems, newItems));
handler.post(new Runnable() {
#Override
public void run() {
applyDiffResult(newItems, diffResult);
}
});
}
}).start();
}
// This method is called when the background work is done
protected void applyDiffResult(List<Object> newItems,
DiffUtil.DiffResult diffResult) {
dispatchUpdates(newItems, diffResult);
}
// This method does the work of actually updating
// the backing data and notifying the adapter
protected void dispatchUpdates(List<Object> newItems,
DiffUtil.DiffResult diffResult) {
// ❌❌❌❌❌❌ Next Line is Crashing the app ❌❌❌❌❌
pendingUpdates.remove();
dispatchUpdates(newItems, diffResult);
if (pendingUpdates.size() > 0) {
updateItemsInternal(pendingUpdates.peek());
}
}
}
Observing LiveData
public void setUpAppliancesListLiveData()
{
if (applianceObserver!=null)
{
applianceObserver = null;
}
Log.e("Appliance Fetch","RoomName:"+this.roomName);
applianceObserver = new Observer<List<Appliance>>() {
#Override
public void onChanged(#Nullable List<Appliance> applianceEntities) {
// Log.e("Appliance Result","Appliance List \n\n:"+applianceEntities.toString());
new Thread(new Runnable() {
#Override
public void run() {
List<Appliance> applianceListTemp = applianceEntities;
zmoteRemoteList = new ArrayList<>(); //appDelegate.getDatabase().zmoteRemoteDao().getRemoteList(roomName);
// Sort according to name
Collections.sort(applianceListTemp, new Comparator<Appliance>() {
#Override
public int compare(Appliance item, Appliance t1) {
String s1 = item.getSwitchName();
String s2 = t1.getSwitchName();
return s1.compareToIgnoreCase(s2);
}
});
if(getActivity()!=null) {
getActivity().runOnUiThread(new Runnable() {
#Override
public void run() {
applianceList = applianceListTemp;
mRecyclerView.getRecycledViewPool().clear();
adapter.setApplianceList(applianceList,zmoteRemoteList);
}
});
}
}
}).start();
}
};
appDelegate.getDatabase().applianceDao().getApplinaceListByRoomName(this.roomName).observe(this, applianceObserver);
}

It takes a long time to load large data in recyclerview

I have 11 text files each containing 50-60 lines. I have read all the files and showed in the recyclerview. I used asynctask to track the progress through the progress bar. I have used log too to see the read lines. I have found that reading is taking short time but after reading, it takes 5-6 seconds to show data in the recyclerview. Why is this causing? What should i do to handle this? Why should i do if there are thousands of text files?
Codes reading files and binding
AsyncTask<Void,Void,Void> task = new AsyncTask<Void, Void, Void>() {
ProgressDialog progressDialog;
#Override
protected void onPreExecute() {
progressDialog = ProgressDialog.show(GrammerDetails.this,
"Loading", "Please Wait for a while");
}
#Override
protected Void doInBackground(Void... voids) {
getFromFilesbagdhara(id,realm);
SharedPreferences.Editor editor = preferences.edit();
editor.putBoolean("first_bagdhara",false);
editor.apply();
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
inflateData(listGrammerItem);
progressDialog.dismiss();
}
}.execute();
private void getFromFilesbagdhara(String id, Realm realm) {
String directory = "Grammer/Bagdhara";
AssetManager man = getAssets();
BufferedReader reader = null;
try {
String[] files = man.list(directory);
for (int i =0;i<files.length;i++){
String fileName = files[i];
reader = new BufferedReader(
new InputStreamReader(getAssets().open(directory+"/" + fileName),
"UTF-8"));
String line;
Log.e("File",files[i]);
while ((line = reader.readLine()) != null) {
Log.e("line",line);
// String[] text = line.split(" ");
String a = line.substring(0,line.indexOf("(")-1);
String b = line.substring(line.indexOf("(")+1,line.indexOf(")"));
String wordOne = a;
// String dummyTwo = text[1];
String wordTwo = b; //dummyTwo.substring(1,dummyTwo.length()-1);
final ClassGrammerItem classGrammerItem = new ClassGrammerItem(wordOne,wordTwo,id);
listGrammerItem.add(classGrammerItem);
}
}
} catch (IOException e) {
e.printStackTrace();
}finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
//log the exception
}
}
}
}
private void inflateData(RealmList<ClassGrammerItem> listGrammerItem) {
AdapterGrammerItem adapter = new AdapterGrammerItem(listGrammerItem, GrammerDetails.this);
recyclerView.setAdapter(adapter);
}
Adapter:
public class AdapterGrammerItem extends RecyclerView.Adapter<AdapterGrammerItem
.ViewHolderAdapterRecycler> {
RealmList<ClassGrammerItem> activityList = new RealmList<ClassGrammerItem>();
Context context;
private LayoutInflater layoutInflater;
public AdapterGrammerItem(RealmList<ClassGrammerItem> activityList, Context context) {
this.activityList = activityList;
this.context = context;
layoutInflater = LayoutInflater.from(context);
}
#Override
public AdapterGrammerItem.ViewHolderAdapterRecycler onCreateViewHolder(ViewGroup parent, int viewType) {
View view = layoutInflater.inflate(R.layout.recycler_grammer_item, parent, false);
AdapterGrammerItem.ViewHolderAdapterRecycler viewHolder = new AdapterGrammerItem.ViewHolderAdapterRecycler(view);
return viewHolder;
}
#Override
public void onBindViewHolder(AdapterGrammerItem.ViewHolderAdapterRecycler holder, int position) {
ClassGrammerItem currentItem = activityList.get(position);
holder.wordOne.setText(currentItem.getWordOne());
holder.wordTwo.setText(currentItem.getWordTwo());
}
#Override
public int getItemCount() {
return activityList.size();
}
public class ViewHolderAdapterRecycler extends RecyclerView.ViewHolder {
MyTextView wordOne, wordTwo;
public ViewHolderAdapterRecycler(View itemView) {
super(itemView);
wordOne = (MyTextView) itemView.findViewById(R.id.wordOne);
wordTwo = (MyTextView) itemView.findViewById(R.id.wordTwo);
}
}
}

Volley library throws application exception

I am adding my two separate android activities in one application, one of my activity having volley library but it gives me an exception that appcontroller(volley library) its an application not an activity please help me out
Ya, you have mention in your manifest file appcontroller class as Application. This solves the exception.
Main Acitivity:
public class MainActivity extends FragmentActivity implements OnTabChangeListener, OnPageChangeListener {
MyPageAdapter pageAdapter;
private ViewPager mViewPager;
private TabHost mTabHost;
private Button btn;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mViewPager = (ViewPager) findViewById(R.id.viewpager);
// Tab Initialization
initialiseTabHost();
// Fragments and ViewPager Initialization
List<Fragment> fragments = getFragments();
pageAdapter = new MyPageAdapter(getSupportFragmentManager(), fragments);
mViewPager.setAdapter(pageAdapter);
mViewPager.setOnPageChangeListener(MainActivity.this);
}
// Method to add a TabHost
private static void AddTab(MainActivity activity, TabHost tabHost, TabHost.TabSpec tabSpec,String message,int picture,Context x)
{
tabSpec.setContent(new MyTabFactory(activity));
View tabIndicator = LayoutInflater.from(x).inflate(R.layout.tab_indicator, tabHost.getTabWidget(), false);
TextView title = (TextView) tabIndicator.findViewById(R.id.title);
title.setText(message);
ImageView icon = (ImageView) tabIndicator.findViewById(R.id.icon);
icon.setBackgroundDrawable(x.getResources().getDrawable(picture));
icon.setScaleType(ImageView.ScaleType.FIT_CENTER);
tabSpec.setIndicator(tabIndicator);
tabHost.addTab(tabSpec);
}
// Manages the Tab changes, synchronizing it with Pages
public void onTabChanged(String tag) {
int pos = this.mTabHost.getCurrentTab();
this.mViewPager.setCurrentItem(pos);
for(int i=0;i<mTabHost.getTabWidget().getChildCount();i++)
{
mTabHost.getTabWidget().getChildAt(i).setBackgroundColor(Color.BLUE);
//mTabHost.getTabWidget().setDividerDrawable(R.Color.transperant);
}
mTabHost.getTabWidget().getChildAt(mTabHost.getCurrentTab()).setBackgroundColor(Color.CYAN);// selected
}
#Override
public void onPageScrollStateChanged(int arg0) {
}
public void destroyItem(View collection, int position, Object view){
((ViewPager) collection).removeView((ImageView) view);
}
// Manages the Page changes, synchronizing it with Tabs
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
int pos = this.mViewPager.getCurrentItem();
this.mTabHost.setCurrentTab(pos);
}
#Override
public void onPageSelected(int arg0) {
}
private List<Fragment> getFragments(){
List<Fragment> fList = new ArrayList<Fragment>();
// TODO Put here your Fragments
NewSampleFragment f1 = NewSampleFragment.newInstance(getApplicationContext(),R.layout.newfragment_a);
MySampleFragment f2 = MySampleFragment.newInstance("Sample Fragment 2");
MySampleFragment f3 = MySampleFragment.newInstance("Sample Fragment 3");
MySampleFragment f4 = MySampleFragment.newInstance("Sample Fragment 4");
MySampleFragment f5 = MySampleFragment.newInstance("Sample Fragment 5");
fList.add(f1);
fList.add(f2);
fList.add(f3);
fList.add(f4);
fList.add(f5);
return fList;
}
// Tabs Creation
private void initialiseTabHost() {
mTabHost = (TabHost) findViewById(android.R.id.tabhost);
mTabHost.setup();
// TODO Put here your Tabs
MainActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab1").setIndicator("Tab1"),"Grocery",R.drawable.movies,getApplicationContext());
MainActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab2").setIndicator("Tab2"),"Crockery",R.drawable.artist,getApplicationContext());
MainActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab3").setIndicator("Tab3"),"Foods",R.drawable.song,getApplicationContext());
MainActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab3").setIndicator("Tab4"),"Drinks",R.drawable.shopping,getApplicationContext());
MainActivity.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab3").setIndicator("Tab5"),"Toys",R.drawable.play,getApplicationContext());
mTabHost.setOnTabChangedListener(this);
}
}
OfferActivity (This should be open when button pressed)
public class OfferActivity extends Activity
{
private static final String TAG = MainActivity.class.getSimpleName();
private ListView listView;
private FeedListAdapter listAdapter;
private List<FeedItem> feedItems;
private ProgressDialog pDialog;
private String URL_FEED = "http://nusdtech.com/public_html/checking2.php";
#SuppressLint("NewApi")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main1);
listView = (ListView) findViewById(R.id.list);
feedItems = new ArrayList<FeedItem>();
listAdapter = new FeedListAdapter(this, feedItems);
listView.setAdapter(listAdapter);
pDialog = new ProgressDialog(this);
// Showing progress dialog before making http request
pDialog.setMessage("Loading...");
pDialog.show();
// These two lines not needed,
// just to get the look of facebook (changing background color & hiding the icon)
getActionBar().setBackgroundDrawable(new ColorDrawable(Color.parseColor("#3b5998")));
//getActionBar().setIcon(
// new ColorDrawable(getResources().getColor(android.R.color.transparent)));
JsonArrayRequest movieReq = new JsonArrayRequest(URL_FEED,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
hidePDialog();
// Parsing json
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
FeedItem movie = new FeedItem();
movie.setId(obj.getInt("id"));
movie.setName(obj.getString("name"));
// Image might be null sometimes
String image = obj.isNull("image") ? null : obj
.getString("image");
movie.setImge(image);
movie.setStatus(obj.getString("status"));
movie.setProfilePic(obj.getString("profilePic"));
//movie.setTimeStamp(obj.getString("price"));
movie.setPrice(obj.getString("price"));
movie.setDate(obj.getString("dates"));
feedItems.add(movie);
} catch (JSONException e) {
e.printStackTrace();
}
}
// notifying list adapter about data changes
// so that it renders the list view with updated data
listAdapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
hidePDialog();
}
});
// Adding request to request queue
AppController.getInstance().addToRequestQueue(movieReq);
}
#Override
public void onDestroy() {
super.onDestroy();
hidePDialog();
}
private void hidePDialog() {
if (pDialog != null) {
pDialog.dismiss();
pDialog = null;
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
AppController:
public class AppController extends Application {
public static final String TAG = AppController.class.getSimpleName();
private RequestQueue mRequestQueue;
private ImageLoader mImageLoader;
LruBitmapCache mLruBitmapCache;
private static AppController mInstance;
#Override
public void onCreate() {
super.onCreate();
mInstance = this;
}
public static synchronized AppController getInstance() {
return mInstance;
}
public RequestQueue getRequestQueue() {
if (mRequestQueue == null) {
mRequestQueue = Volley.newRequestQueue(getApplicationContext());
}
return mRequestQueue;
}
public ImageLoader getImageLoader() {
getRequestQueue();
if (mImageLoader == null) {
getLruBitmapCache();
mImageLoader = new ImageLoader(this.mRequestQueue, mLruBitmapCache);
}
return this.mImageLoader;
}
public LruBitmapCache getLruBitmapCache() {
if (mLruBitmapCache == null)
mLruBitmapCache = new LruBitmapCache();
return this.mLruBitmapCache;
}
public <T> void addToRequestQueue(Request<T> req, String tag) {
req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
getRequestQueue().add(req);
}
public <T> void addToRequestQueue(Request<T> req) {
req.setTag(TAG);
getRequestQueue().add(req);
}
public void cancelPendingRequests(Object tag) {
if (mRequestQueue != null) {
mRequestQueue.cancelAll(tag);
}
}
}
Activity that contain fragment buttons
public class NewSampleFragment extends Fragment {
private static View mView;
private Context con;
public static final NewSampleFragment newInstance(Context con,int layout) {
NewSampleFragment f = new NewSampleFragment();
con=con;
Bundle b = new Bundle();
b.putInt("mylayout",layout);
f.setArguments(b);
return f;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
int layout = getArguments().getInt("mylayout");
mView = inflater.inflate(R.layout.newfragment_a, container, false);
Button button = (Button) mView.findViewById(R.id.bactivity);
Button offer=(Button) mView.findViewById(R.id.aactivity);
button.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
Intent myIntent = new Intent(getActivity(), ListViewDemo.class);
//Optional parameters
getActivity().startActivity(myIntent);
Log.e("Error","Kashif");
}
});
offer.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
startApplication("uzair.sabir.app.OfferActivity");
}
});
return mView;
}
public void startApplication(String application_name){
try{
Intent intent = new Intent("android.intent.action.MAIN");
intent.addCategory("android.intent.category.LAUNCHER");
intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
List<ResolveInfo> resolveinfo_list = getActivity().getPackageManager().queryIntentActivities(intent, 0);
for(ResolveInfo info:resolveinfo_list){
if(info.activityInfo.packageName.equalsIgnoreCase(application_name)){
launchComponent("uzair.sabir.app", "OfferActivity");
break;
}
}
}
catch (ActivityNotFoundException e) {
Toast.makeText(getActivity(), "There was a problem loading the application: "+application_name,Toast.LENGTH_SHORT).show();
Log.e("Error",e.getMessage());
}
}
private void launchComponent(String packageName, String name){
Intent launch_intent = new Intent("android.intent.action.MAIN");
launch_intent.addCategory("android.intent.category.LAUNCHER");
launch_intent.setComponent(new ComponentName(packageName, name));
launch_intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
getActivity().startActivity(launch_intent);
}
}

Memory leak with view pager and fragment

In this part of my application there is a ViewPager contents in a fragment,
when i replace the fragment contains the viewpager android doesn't clear the memory.
How can I clear the memory?
this is the adapter for the listview:
public class LineeAdapter extends ArrayAdapter<Linea> {
private final List<Linea> list;
private final Activity context;
private final int layout;
public LineeAdapter(Activity context,int layout, List<Linea> list) {
super(context, layout, list);
this.context = context;
this.list = list;
this.layout=layout;
}
static class ViewHolder {
protected TextView text;
protected TextView text1;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = null;
if (convertView == null) {
LayoutInflater inflator = context.getLayoutInflater();
view = inflator.inflate(layout, null);
final ViewHolder viewHolder = new ViewHolder();
viewHolder.text = (TextView) view.findViewById(R.id.cod_linea);
viewHolder.text1 = (TextView) view.findViewById(R.id.descrizione_linea);
view.setTag(viewHolder);
} else {
view = convertView;
}
ViewHolder holder = (ViewHolder) view.getTag();
holder.text.setText(list.get(position).getCod_Linea());
holder.text1.setText(list.get(position).getDesc_Linea());
return view;
}
this is the fragmet contain in the view pager
public class TempiAtt_Linee extends Fragment
{
View view;
ListView lw;
int dati;
LineeAdapter adapter;
List<Linea> linee ;
static TempiAtt_Linee newInstance(int num)
{
TempiAtt_Linee f = new TempiAtt_Linee();
return f;
}
#Override
public void onDestroyView()
{
super.onDestroyView();
getView().destroyDrawingCache();
linee.clear();
adapter.notifyDataSetChanged();
adapter.clear();
view = null;
lw = null;
linee = null;
System.gc();
}
#Override
public void onActivityCreated(Bundle savedInstanceState)
{
super.onActivityCreated(savedInstanceState);
linee= new ArrayList<Linea>();
for (int i = 0; i < Main.GeneralObject.getLinee().size(); i++)
{
this.linee.add(Main.GeneralObject.getLinee().get(i));
}
lw = (ListView) getView().findViewById(R.id.list_view);
adapter = new LineeAdapter(getActivity(), R.layout.row_linea, linee);
lw.setAdapter(adapter);
lw.setOnItemClickListener(new OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int position, long arg3)
{
ArrayList<Percorso> tratte = linee.get(position).getPercorsi();
Fragment fragment = new TempiAtt_Percorsi();
FragmentManager fragmentManager = getActivity()
.getSupportFragmentManager();
Bundle temp = new Bundle();
temp.putString("linea", linee.get(position).getCod_Linea()
.replace(" ", "_"));
temp.putSerializable("tratte",
SerializerClass.serializeObject(tratte));
fragment.setArguments(temp);
fragmentManager.beginTransaction().addToBackStack(null)
.replace(R.id.content_frame, fragment).commit();
}
});
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
view = inflater.inflate(R.layout.generic_listview, container, false);
return view;
}
}
and this is the fragment of the viewpager:
public class TempiAtt extends Fragment {
// list contains fragments to instantiate in the viewpager
List<Fragment> fragments = null;
int NUM = 3;
List<String> fragmentTitles = null;
// page adapter between fragment list and view pager
private MyAdapter mPagerAdapter = null;
// view pager
private ViewPager mViewPager;
private Handler handler;
View view;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
view = inflater.inflate(R.layout.main_prova, container, false);
return view;
}
public void clear() {
if (null != mViewPager) {
mViewPager.removeAllViews();
}
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
mViewPager = (ViewPager) getView().findViewById(R.id.pager);
fragments = new Vector<Fragment>();
setRetainInstance(true);
fragmentTitles = new Vector<String>();
Bundle scheda = new Bundle();
scheda.putInt("scheda", 0);
// creating fragments and adding to list
fragments.add(Fragment.instantiate(getActivity(),
TempiAtt_Linee.class.getName(), scheda));
fragmentTitles.add(getActivity().getResources().getString(
R.string.urbana_como));
Bundle scheda1 = new Bundle();
scheda1.putInt("scheda", 1);
fragments.add(Fragment.instantiate(getActivity(),
TempiAtt_Linee.class.getName(), scheda1));
fragmentTitles.add(getActivity().getResources().getString(
R.string.extraurbana));
Bundle scheda2 = new Bundle();
scheda2.putInt("scheda", 2);
fragments.add(Fragment.instantiate(getActivity(),
TempiAtt_Linee.class.getName(), scheda2));
fragmentTitles.add(getActivity().getResources().getString(
R.string.urbana_cantu));
View pagerStrip = super.getView().findViewById(R.id.pagerTabStrip);
if (pagerStrip instanceof PagerTabStrip) {
PagerTabStrip pagerTabStrip = (PagerTabStrip) pagerStrip;
pagerTabStrip.setDrawFullUnderline(true);
pagerTabStrip.setTabIndicatorColorResource(R.color.bianco);
} else if (pagerStrip instanceof PagerTitleStrip) {
PagerTitleStrip pagerTitleStrip = (PagerTitleStrip) pagerStrip;
pagerTitleStrip.setTextColor(getResources().getColor(
android.R.color.white));
}
/*
* this.mPagerAdapter = new PagerAdapter(getChildFragmentManager(),
* fragments, fragmentTitles);
* mViewPager.setAdapter(this.mPagerAdapter);
* mViewPager.setCurrentItem(0);
*/
mPagerAdapter = new MyAdapter(getChildFragmentManager());
handler = new Handler();
handler.post(new Runnable() {
#Override
public void run() {
mViewPager.setAdapter(mPagerAdapter);
}
});
mViewPager.setOffscreenPageLimit(2);
}
#Override
public void onDestroyView() {
super.onDestroyView();
onDestroy();
deleteCard();
clear();
view = null;
System.gc();
}
public void deleteCard() {
// Reduce the card counter by one
NUM -= 3;
for (int i = 0; i < fragments.size(); i++) {
fragments.remove(i);
Log.e("SONO IO", fragments.size() + "");
}
mPagerAdapter.notifyDataSetChanged();
}
private class MyAdapter extends FragmentPagerAdapter {
private SparseArray<WeakReference<TempiAtt_Linee>> mPageReferenceMap = new SparseArray<WeakReference<TempiAtt_Linee>>();;
public MyAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int index) {
return getFragment(index);
}
#Override
public int getCount() {
return NUM;
}
public int getItemPosition(Object object) {
return POSITION_NONE;
}
public TempiAtt_Linee getFragment(int key) {
WeakReference<TempiAtt_Linee> weakReference = mPageReferenceMap
.get(key);
if (null != weakReference) {
return (TempiAtt_Linee) weakReference.get();
} else {
return null;
}
}
public Object instantiateItem(ViewGroup container, int position) {
TempiAtt_Linee tempiAttLinee = TempiAtt_Linee.newInstance(position);
mPageReferenceMap.put(Integer.valueOf(position),
new WeakReference<TempiAtt_Linee>(tempiAttLinee));
return super.instantiateItem(container, position);
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
super.destroyItem(container, position, object);
mPageReferenceMap.remove(Integer.valueOf(position));
}
}
}

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