I am getting a problem transfering the text from an EditText to a TextView (I have also tested transfering it to an EditText with the property enable set to false) and it works OK on the emulator but when I test it on the real device, it always crashes when it attempts to set the text.
I have also tested sending just a text (see commented line) with the same result
EditText editText = (EditText) findViewById(R.id.Texte);
editText.setOnEditorActionListener(new OnEditorActionListener()
{
#Override
public boolean onEditorAction(TextView arg0, int arg1, KeyEvent arg2)
{
int A;
boolean handled = false;
if (arg2.getKeyCode() == KeyEvent.KEYCODE_ENTER)
{
TextView Etiqueta = (TextView)findViewById(R.id.textView1);
Etiqueta.setText(arg0.getText().toString());
//Etiqueta.setText("40");
handled = true;
}
return handled;
}
});
I have found another way using the onKeyListener that don't gives error
#Override
public boolean onKey(View view, int keyCode, KeyEvent event)
{
TextView Etiqueta = (TextView)findViewById(R.id.textView1);
TextView Etiqueta2 = (TextView)findViewById(R.id.textView2);
EditText myEditText = (EditText) view;
if ( event.getKeyCode() == KeyEvent.KEYCODE_ENTER)
{
if (!event.isShiftPressed())
{
//Log.v("AndroidEnterKeyActivity","Enter Key Pressed!");
switch (view.getId())
{
case R.id.Texte:
Etiqueta.setText(myEditText.getText());
break;
case R.id.Texte2:
Etiqueta2.setText(myEditText.getText());
break;
}
return true;
}
}
return false;
}
Related
My recyclerview's adapter continuously calls getItemViewType() and seems to be no sign to stop.
I also print log in onBindViewHolder(), onCreateViewHolder(), and viewHolder's bind function, but only getItemViewType get called infinitely.
How can I solve this problem?
My Fragment:
I added log in each function, and didn't see any function be called continuously.
public class Fragment{
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (presenter == null) {
presenter = new Presenter(this);
}
initViewModel();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
setRecyclerView();
//this will modify adapter
loadData();
return rootView;
}
void initViewModel(){
messageViewModel = new ViewModelProvider(this).get(messageViewModel.class);
final Observer<ArrayList<WallPost>> wallPostObserver = wallPostList -> {
//this will modify adapter
updateRecyclerView(wallPostList);
};
messageViewModel.getWallPostsLiveData().observe(this, wallPostObserver);
}
public void setRecyclerView() {
layoutManager = new LinearLayoutManager(getContext());
recyclerView.setLayoutManager(layoutManager);
adapter = new Adapter(getContext(), new ArrayList<>(), Repository.getInstance().getMemberData().getValue(), getType());
recyclerView.setAdapter(adapter);
recyclerView.addOnScrollListener(scrollListener);
}
}
My Adapter getItemViewType(int position) function:
Adapter getItemCount() be called continuously same as getItemViewType(int position).
#Override
public int getItemViewType(int position) {
if (wallPostList.size() == 0) {
return VIEW1;
}else if(position >= wallPostList.size()){
return VIEW7;
}
WallPost wallPost = wallPostList.get(position);
Log.d("Adapter","position:"+position);
if(wallPost.getStatus().equals(POST_STATUS_REVOKE)){
return VIEW8;
}
switch (wallPost.getType()) {
case azz:
return VIEW5;
case axx:
return VIEW6;
case ayy:
default:
if(wallPost.getMsgItemList().size() > 0){
return VIEW4;
}else if(StringUtils.checkHasLink(wallPost.getContent())){
return VIEW3;
}else {
return VIEW2;
}
}
}
Update: cause problem's code
I found the problem cause this, I solve this problem by add a flag in my customize view to restrict not repeat onMeansure, but I don't know why this will make adapter repeat call getItemViewType(int position) and getItemCount().
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if(type.equals(SINGLE)){
info.post(()->{
halfWidth = (info.getMeasuredWidth()- arrowImageView.getMeasuredWidth())/2;
name.setMaxWidth(halfWidth-image.getMeasuredWidth());
tvNoticeTime.setMaxWidth(halfWidth-image.getMeasuredWidth());
});
}
else if(type.equals(MULTI)){
info.post(()->{
name.setMaxWidth(info.getMeasuredWidth()-image.getMeasuredWidth() - (int)PixelUtil.convertDpToPixel(8,context));
});
}
else{
int dis = (int)PixelUtil.convertDpToPixel(8,context);
info.post(()->{
name.setMaxWidth(info.getMeasuredWidth()-image.getMeasuredWidth()-dis-
infoImageView.getMeasuredWidth()-dis);
});
}
}
The problem you are facing is that you update your RecyclerView based on the wallPostObserver that looks for changes in the wallPostList. There could be a problem regaring this because if the List changes there is a chnage in the recycler View and the getItemViewType method is called. If you made it so that the recyclerView is only updated once the user chooes to or in fix intervals you wouldn't have the problem. You could fix that by creating a Method that triggers if the List changes (without using an Observer) there you could define the max update interval and make is so that you dont always throw away your entire list.
I have three edittext values for which i am using textwatcher to update data.
I want that if i enter any value in anyone of the edit text then according to that value it should calculate and then update the edittext in which i entered the value automatically and after that set the value in other specif edit text and save the final value in string if need to send to any server.
//My Code
public class Land_details extends AppCompatActivity {
EditText land_acre_edit;
EditText land_kanal_edit;
EditText land_marla_edit;
Button land_button;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_land_details);
land_acre_edit = findViewById(R.id.land_acre_edit);
land_kanal_edit = findViewById(R.id.land_kanal_edit);
land_marla_edit = findViewById(R.id.land_marla_edit);
land_button = findViewById(R.id.save_land_detail);
land_acre_edit.addTextChangedListener(mytext_watcher);
land_marla_edit.addTextChangedListener(mytext_watcher);
land_kanal_edit.addTextChangedListener(mytext_watcher);
}
private TextWatcher mytext_watcher = new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
try {
String check_marla = land_marla_edit.getText().toString();
String check_kanal = land_kanal_edit.getText().toString();
String check_acre = land_acre_edit.getText().toString();
if (check_marla != null) {
if ((Integer.valueOf(check_marla) > 8)) {
check_acre =(String.valueOf(Integer.valueOf(check_kanal) + (Integer.valueOf(land_marla) / 20)));
check_marla=( String.valueOf(Integer.valueOf(land_marla) % 20));
check_acre = String.valueOf(check_acre) + (Integer.valueOf(check_kanal) / 8);
check_kanal = String.valueOf(Integer.valueOf(check_kanal) % 8);
land_marla_edit.setText(check_marla);
land_kanal_edit.setText(check_kanal);
land_acre_edit.setText(check_acre);
}}
}catch (NumberFormatException e){
}
}
#Override
public void afterTextChanged(Editable s) {
}
};
I have tried to set my try catch code in aftertextChanged but at first it was giving me numberformatexception as soon as i enter a text above my contion my app crash but after that i tried using try catch to catch a numberformatexception after that i am able to add number above my condition and even after a long wait nothing happen can any one explain where i am going wrong.
I implemented a navigation drawer and had used fragments. Now i can switch to fragments from the drawer menu. But when i press back, my app closes from that fragment and don't know how to go back to the main activity.
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
int id = item.getItemId();
displaySelectedScreen(id);
return true;
}
private void displaySelectedScreen(int id) {
Fragment frag = null;
switch (id) {
case R.id.trigger:
break;
case R.id.setup:
if (android.os.Build.VERSION.SDK_INT >= 21) {
getWindow().setStatusBarColor(Color.parseColor("#7B1FA2"));
}
getSupportActionBar().setBackgroundDrawable(new ColorDrawable(Color.parseColor("#8E24AA")));
frag = new SettingsF();
break;
case R.id.recordings:
if (android.os.Build.VERSION.SDK_INT >= 21) {
getWindow().setStatusBarColor(Color.parseColor("#4E342E"));
}
getSupportActionBar().setBackgroundDrawable(new ColorDrawable(Color.parseColor("#8D6E63")));
break;
case R.id.howto:
if (android.os.Build.VERSION.SDK_INT >= 21) {
getWindow().setStatusBarColor(Color.parseColor("#7B1FA2"));
}
getSupportActionBar().setBackgroundDrawable(new ColorDrawable(Color.parseColor("#8E24AA")));
break;
case R.id.about:
if (android.os.Build.VERSION.SDK_INT >= 21) {
getWindow().setStatusBarColor(Color.parseColor("#7B1FA2"));
}
getSupportActionBar().setBackgroundDrawable(new ColorDrawable(Color.parseColor("#8E24AA")));
break;
case R.id.email_us:
if (android.os.Build.VERSION.SDK_INT >= 21) {
getWindow().setStatusBarColor(Color.parseColor("#7B1FA2"));
}
getSupportActionBar().setBackgroundDrawable(new ColorDrawable(Color.parseColor("#8E24AA")));
break;
}
if (frag != null) {
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.replace(R.id.content_main, frag);
ft.addToBackStack(ft.getClass().getSimpleName()).commit();
}
DrawerLayout drawer = findViewById(R.id.drawer);
drawer.closeDrawer(GravityCompat.START);
}
And here is the setting fragment only:
public class SettingsF extends ListFragment {
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment_settings, container, false);
String[] datasource = {"Trusted Contacts", "Custom Text Set-Up"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), R.layout.rowlayout, R.id.txtitems, datasource);
setListAdapter(adapter);
setRetainInstance(true);
return rootView;
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
getActivity().setTitle("Context Set-Up");
}
public void onListItemClick(ListView l, View view, int position, long id) {
ViewGroup viewGroup = (ViewGroup) view;
TextView tv = (TextView) viewGroup.findViewById(R.id.txtitems);
Toast.makeText(getActivity(), tv.getText().toString(), Toast.LENGTH_LONG).show();
}
#Override
public void onResume() {
getView().setFocusableInTouchMode(true);
getView().requestFocus();
getView().setOnKeyListener( new View.OnKeyListener()
{
#Override
public boolean onKey( View v, int keyCode, KeyEvent event )
{
if( keyCode == KeyEvent.KEYCODE_BACK )
{
//Already Used Intent, doesn't work
return true;
}
return false;
}
} );
super.onResume();
}
}
I updated the question. I already used addToBackStack(), then overrided the method onResume() but still the app terminates when pressing the back button.
I'm really that new to this, so don't misunderstand me what did i implemented throughout the codes.
Thanks In Advance
for Hardware backbutton
add this code in onResume method in fragment
//You need to add the following line
fragment.getView().setFocusableInTouchMode(true);
fragment.getView().requestFocus();
fragment.getView().setOnKeyListener( new OnKeyListener()
{
#Override
public boolean onKey( View v, int keyCode, KeyEvent event )
{
if( keyCode == KeyEvent.KEYCODE_BACK )
{
//here use intent to call mainActivity
return true;
}
return false;
}
} );
hope this will help you
Add this line after ft.replace():
ft.addToBackStack(null);
This line will make it so that each time you select an item from the navigation drawer, a history of fragments is built up. Then when you press the back button, you'll go back through the history. If you have no history items, the app will close.
A more sophisticated implementation might use a name argument (like "FragA" or "FragB") instead of null as the argument for addToBackStack(), and then check to see if your fragment already exists in the back stack instead of always opening a new one. That way if you went A->B->A->B->A->B you wouldn't have three copies of A and two copies of B in the history.
I'm developing an app which counts number of times the app goes to the background. It also retains the values when the orientation is changed. Though I have it working of all use cases, I have one use case which does not work.
Case : When I press the home button, change the phone's orientation and reopen the app, It does open in landscape mode but, the background count does not increase.
I have tried setting values in all the life cycle methods. It doesn't work. Hope somebody can help me with this.
`
public class MainActivity extends AppCompatActivity {
private int clickCount =0, backgroundCount = 0;
TextView tvClickCountValue, tvBackgroundCountValue;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if( savedInstanceState != null){
clickCount = savedInstanceState.getInt("COUNT");
backgroundCount = savedInstanceState.getInt("BGCOUNT");
}
setContentView(R.layout.activity_main);
tvClickCountValue = (TextView) this.findViewById(R.id.tvClickCountValue);
tvBackgroundCountValue = (TextView) this.findViewById(R.id.tvBackgroundCountValue);
setView(MainActivity.this);
}
public void onClick(View v){
clickCount += 1;
tvClickCountValue.setText(Integer.toString(clickCount));
}
public void setView(Context ctx){
tvClickCountValue.setText(Integer.toString(clickCount));
tvBackgroundCountValue.setText(Integer.toString(backgroundCount));
}
#Override
protected void onStop() {
super.onStop();
backgroundCount += 1;
}
#Override
protected void onResume() {
super.onResume();
tvClickCountValue.setText(Integer.toString(clickCount));
tvBackgroundCountValue.setText(Integer.toString(backgroundCount));
}
#Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("COUNT", clickCount);
outState.putInt("BGCOUNT", backgroundCount);
}
#Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
clickCount = savedInstanceState.getInt("COUNT");
backgroundCount = savedInstanceState.getInt("BGCOUNT");
}
}
This article contains useful information: https://developer.android.com/guide/topics/resources/runtime-changes.html especially in the section about Handling The Change.
Try handling it on onConfigurationChanged() of you have disabled Activity restarts on orientation changes. Otherwise, probably through this article you will find which case applies to your scenario.
By reading the problem description, I am assuming that if you don't rotate the device the application works as intended.
you need to persist the count in the SharedPreferences. each time you reopen the app read the last value from the SharedPreferences. And increment and save to SharedPreferences each time the app is hidden.
Then you can count the with #kiran code:
public class BaseActivity extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
public static boolean isAppInFg = false;
public static boolean isScrInFg = false;
public static boolean isChangeScrFg = false;
#Override
protected void onStart() {
if (!isAppInFg) {
isAppInFg = true;
isChangeScrFg = false;
onAppStart();
}
else {
isChangeScrFg = true;
}
isScrInFg = true;
super.onStart();
}
#Override
protected void onStop() {
super.onStop();
if (!isScrInFg || !isChangeScrFg) {
isAppInFg = false;
onAppPause();
}
isScrInFg = false;
}
public void onAppStart() {
// app in the foreground
// show the count here.
}
public void onAppPause() {
// app in the background
// start counting here.
}
}
In my android application, I am trying to show contextual action bar (CAB) in listview for item delete. The problem is that whenever an item is pressed for long, the item gets selected, but CAB doesn't appear. I have verified with so many tutorials, can't figure out what am I missing. Any help would be appreciated.
Adapter Class
public class DuasListAdapter extends ArrayAdapter<String>{
// class variables
private final Context context;// to save context
private final List<String> duas;// to save list of stores
LayoutInflater inflater;//
private SparseBooleanArray selectedItemsIds;
public DuasListAdapter(Context ctx,int resourceId, List<String> duasList) {
super(ctx, resourceId, duasList);
selectedItemsIds = new SparseBooleanArray();
context = ctx;// save context
duas = duasList;// save list of stores
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);// save inflater layout
}
*/
#Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if(convertView==null){
holder = new ViewHolder();
convertView = inflater.inflate(R.layout.adapter_list_duas, null);
convertView.setTag(holder);
holder.duaIndex = position;
holder.background = (LinearLayout) convertView.findViewById(R.id.ll_duas_list);
holder.iv_duatype = (ImageView) convertView.findViewById(R.id.iv_duatype);
holder.tv_dua_arabic = (TextView) convertView.findViewById(R.id.tv_dua_arabic);
holder.tv_dua_no = (TextView) convertView.findViewById(R.id.dua_no);
}
else {
holder = (ViewHolder) convertView.getTag();
}
return convertView;
}
static class ViewHolder {
int duaIndex;
LinearLayout background;// background to display color for read and unread messages
ImageView iv_duatype;
TextView tv_dua_arabic;// title of message
TextView tv_dua_ref;// message by and message created on
TextView tv_dua_no;
/**
* #description constructor to save context and list of stores views
* #param v to refer the view
* #return
*/
}
public void remove(List<String> object){
duas.remove(object);
notifyDataSetChanged();
}
public List<String> getDuas(){
return duas;
}
public void toggleSelection(int position) {
selectView(position, !selectedItemsIds.get(position));
}
public void removeSelection() {
selectedItemsIds = new SparseBooleanArray();
notifyDataSetChanged();
}
public void selectView(int position, boolean value) {
if (value)
selectedItemsIds.put(position, value);
else
selectedItemsIds.delete(position);
notifyDataSetChanged();
}
public int getSelectedCount() {
return selectedItemsIds.size();
}
public SparseBooleanArray getSelectedIds() {
return selectedItemsIds;
}
}
Fragment Class
Context context;
LinearLayout ll_back_duas_list_header;
TextView ll_back_duas_list_header_title;
ListView lvDuaas;
public static DuasListAdapter duasAdapter;
ActionMode mAction;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
context = inflater.getContext();
View view = inflater.inflate(R.layout.fragment_list_duas, container, false);
ll_back_duas_list_header = (LinearLayout) view.findViewById(R.id.ll_back_duas_list_header);
ll_back_duas_list_header_title = (TextView) view.findViewById(R.id.ll_back_duas_list_header_title);
lvDuaas = (ListView) view.findViewById(R.id.lv_duas);
setHasOptionsMenu(true);
return view;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
String verses = new SharedPreferencesSupplication().read(SingletonClass.keyListOfVerses, "a1");
String[] versesList = verses.split(",");
final ArrayList<String> duas = new ArrayList<String>();
for (int i = 0; i < versesList.length; i++) {
if (versesList[i].length() > 0)
duas.add(versesList[i]);
}
duasAdapter = new DuasListAdapter(context,R.layout.adapter_list_duas,duas);
lvDuaas.setAdapter(duasAdapter);
lvDuaas.setOnItemLongClickListener(new OnItemLongClickListener() {
#Override
public boolean onItemLongClick(AdapterView<?> parent,
View view, int position, long id) {
// TODO Auto-generated method stub
lvDuaas.setChoiceMode(lvDuaas.CHOICE_MODE_MULTIPLE);
lvDuaas.setItemChecked(position, true);
mAction = getActivity().startActionMode(modeCallBack);
view.setSelected(true);
return true;
}
});
super.onActivityCreated(savedInstanceState);
}
ActionMode.Callback modeCallBack = new ActionMode.Callback() {
#Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
// TODO Auto-generated method stub
mode.getMenuInflater().inflate(R.menu.activity_main, menu);
return false;
}
#Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean onActionItemClicked(ActionMode mode,
MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case R.id.delete:
// Calls getSelectedIds method from ListViewAdapter Class
SparseBooleanArray selected = duasAdapter
.getSelectedIds();
// Captures all selected ids with a loop
for (int i = (selected.size() - 1); i >= 0; i--) {
if (selected.valueAt(i)) {
String selecteditem = duasAdapter.getItem(selected.keyAt(i));
// Remove selected items following the ids
duasAdapter.remove(selecteditem);
}
}
// Close CAB
mode.finish();
return true;
default:
return false;
}
}
#Override
public void onDestroyActionMode(ActionMode mode) {
// TODO Auto-generated method stub
duasAdapter.removeSelection();
}
};
}
XML file
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
>
<item
android:id="#+id/delete"
android:title="#string/delete"
/>
</menu>
From looking at your code I can see the onCreateActionMode callback function returns false.
onCreateActionMode should return true if the action mode should be created, false if entering this mode should be aborted.
So when the user long clicks on the ListItem and the event is triggered it reaches onCreateActionMode and returns false. Telling it to abort. Hence no CAB menu appears. Try changing it to true and also adding in some logs to see if it ever makes it into the callback function.
This would be the change below:
#Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
// TODO Auto-generated method stub
Log.d("Test","In onCreateActionMode");
mode.getMenuInflater().inflate(R.menu.activity_main, menu);
return true;//code updated here
}
Android Link to reference : http://developer.android.com/reference/android/view/ActionMode.Callback.html#onCreateActionMode(android.view.ActionMode, android.view.Menu)