Develop Reference

Can't get it to not play code more than once

I pass the text through Intent to another activity, through which it is determined what will be shown to the user, dialog window with victory/defeat.
Everything seems to work well, but the problem is that when the phone screen turns off, the actions are repeated. For example, after winning, I received a dialog about what I won, after that, closing the dialog box, turned off the screen while still in the same activity, then turned the screen back on and I get the dialog box again. It seems that I put the code for showing the dialog in onResume, but I didn't.
I tried turning off the re-show of the dialog box in the following ways, which I will show below:
getIntent().removeExtra("TEXT");
boolean
By the way, about boolean, when I created a variable with this code: boolean offScreen = false, then in onCreate I checked in the if condition, and in the action set boolean to true, the dialog box again appeared, it seems that the activity doesn't pay attention to the boolean.
Please tell me how should I.
Just in case, here's the whole code:
String win_lose_select;
String text = getIntent().getStringExtra("TEXT");
win_lose_select = text;
Handler handler4 = new Handler();
handler4.postDelayed(() -> {
if (Objects.equals(win_lose_select, "win")){
youWin_DIALOG();
soundPlay(star_sound);
}
if (Objects.equals(win_lose_select, "lose")){
youWin_DIALOG();
TextView textView = you_win_dia.findViewById(R.id.textWin);
textView.setText("You lost, don't be discouraged, maybe you'll be lucky next time!\nThe defeat is counted.");
soundPlay(lose_sound);
}
if (Objects.equals(win_lose_select, "winNetwork")){
youWin_DIALOG();
TextView textView = you_win_dia.findViewById(R.id.textWin);
textView.setText("You have won, congratulations, your opponent has surrendered!\nVictory counted.");
soundPlay(star_sound);
}
},2000);
public void youWin_DIALOG() {
you_win_dia = new Dialog(this);
you_win_dia.requestWindowFeature(Window.FEATURE_NO_TITLE);
you_win_dia.setContentView(R.layout.you_win);
you_win_dia.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
you_win_dia.setCancelable(true);
getIntent().removeExtra("TEXT");
win_lose_select = "no";
Button go_to_rooms_win = (Button) you_win_dia.findViewById(R.id.go_to_rooms_win);
go_to_rooms_win.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
soundPlay (tuck);
you_win_dia.dismiss();
}
});
you_win_dia.show();
Window window = you_win_dia.getWindow();
window.setLayout(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.WRAP_CONTENT);
}

Is there a way to update listView item layout in android studio?

I'm making a button that when i click on him the visibility of a checkbox withing a listView will change. however it appears that the code run as expected but the visibailty is not udpateing. is there a way to update the item's visabilty?
mButtonEdit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
for(int i = 0 ; i<calanders.size();i++){
View view = mListView.getAdapter().getView(i,null,mListView);
if(mButtonEdit.isSelected()){
print("button is selected");
CheckBox checkBox = view.findViewById(R.id.clockproperties_checkBox);
checkBox.setVisibility(View.GONE);
}else{
print("button is not selected");
CheckBox checkBox = view.findViewById(R.id.clockproperties_checkBox);
checkBox.setVisibility(View.VISIBLE);
}
}
mListView.getAdapter().
if(mButtonEdit.isSelected()){
mButtonEdit.setSelected(false);
}else{
mButtonEdit.setSelected(true);
}
}
});

You should never call the ListAdapter's getView() method. It is only supposed to be called by the system when scrolling though the ListView. Instead you need to update the list by calling mListView.getAdapter().notifyDataSetChanged().
Add a boolean field in the adapter and update its value when the button is clicked.

You can create a model/data class based on your data and keep a Boolean variable for checkbox visibility. So default make it false and on button click get the position of list-view item and update Boolean variable to true, and do adapter.notifyDataSetChanged().
You can also try with :
((YourAdapter) yourListView.getAdapter()).notifyDataSetChanged();

Can't unselect ListView item when deleting it

Trudging my way through my introduction to Java and Android on a simple app and have run into an issue with ListView item selection. For one of my activities, I have a layout with two buttons, one of which is a "Delete" button, and a ListView of "passages" which are essentially timestamps for when a device has passed a sensor.
I have implemented the ability to click on an item to select it, which then enables the "Delete" button. A click of the "Delete" button removes the "passage" but I still end up with a selected item, which I don't want.
To implement selection, I added the following property to the ListView:
android:id="#+id/passagesListView"
android:choiceMode="singleChoice"
android:listSelector="#666666"
Selection is supported in OnCreate via a an OnItemClickListener:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_passages);
passagesViewAdapter = new PassagesViewAdapter(this, R.layout.passages_row_layout, passages);
final ListView passagesListView = (ListView) findViewById(R.id.passagesListView);
assert passagesListView != null;
final Button deleteButton = (Button) findViewById(R.id.deleteButton);
deleteButton.setEnabled(false);
buildPassageList();
passagesListView.setAdapter(passagesViewAdapter);
passagesListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapter, View view, int position,long arg3) {
Toast.makeText(ViewPassagesActivity.this, "position is " + position,
Toast.LENGTH_LONG).show();
view.setSelected(true);
passagesViewAdapter.notifyDataSetChanged();
selectedItemPos = position;
deleteButton.setEnabled(true);
}
});
}
This part works. However, there is some issue with deletion. As you can see in the comments, I have tried several methods that I found on StackOverflow that seemed to apply but, although I am able to delete the correct item from the list, I am still ending up with a selected item after the call to delete().
public void delete (View view)
{
final Button deleteButton = (Button) findViewById(R.id.deleteButton);
ListView passagesListView = (ListView) findViewById(R.id.passagesListView);
if(selectedItemPos != -1)
{
Toast.makeText(ViewPassagesActivity.this, "remove " + selectedItemPos,
Toast.LENGTH_LONG).show();
// This did not work, which is strange since it worked similarly for selection when clicked
// View itemView = passagesListView.getChildAt(selectedItemPos);
View itemView = passagesViewAdapter.getView(selectedItemPos, null, passagesListView);
itemView.setSelected(false);
// This was also recommended in various posts on StackOverflow.
// Not clear whether clearChoices applies only to checkBoxes?
// passagesListView.clearChoices();
// passagesListView.requestLayout();
passages.remove(selectedItemPos);
deleteButton.setEnabled(false);
selectedItemPos = -1;
passagesViewAdapter.notifyDataSetChanged();
}}
}
I also ran into some issues trying to track which item is selected via setSelected() and getSelectedItemPosition() and punted by just tracking the index myself. So, as I am new to this, I'm sure there is something I am not understanding about Views or maybe something else such as a misunderstanding of how selection works?
How can I clear the selection?
Thanks!

I don't know what your PassagesViewAdapter class looks like. Maybe you can try
passagesViewAdapter.remove(passages.get(selectedItemPos));
passages.remove(selectedItemPos);
deleteButton.setEnabled(false);
selectedItemPos = -1;
passagesViewAdapter.notifyDataSetChanged();

Loop through each child element and compare its text in java

I am trying to build an android app that gets some questions from a database and its possible answers (the answers are created dynamically as UI buttons). What I have managed so far is that once the user clicks on an answer, if the answer is right the button's colour becomes green, and if the answer is wrong the colour becomes red. What I want to achieve is in case the answer was wrong, change the button's colour to red and find the button with the correct answer and change it's colour to green. I am currently trying to do this by looping through every child element of the clicked button's parent, and comparing its text with the right answer given from the database. This is what my code looks like:
final TableRow textRow = new TableRow(this);
textRow.addView(questionText, rowParamsQuestions);
layout.addView(textRow, layoutParams);
for(final String option : currentQuestion.getOptions())
{
final Button button = new Button(this);
button.setText(option);
button.setTextSize(16);
button.setBackgroundResource(R.drawable.rounded_shape);
button.setTextColor(Color.WHITE);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Button clicked = (Button) v;
if (!answeredQuestions.containsKey(currentQuestion)) {
answeredQuestions.put(currentQuestion, clicked.getText().toString());
if (clicked.getText().equals(currentQuestion.getAnswer())) {
clicked.setBackgroundResource(R.drawable.right_answer);
} else {
clicked.setBackgroundResource(R.drawable.wrong_answer);
for (int i = 0; i < textRow.getChildCount(); i++) {
View child = textRow.getChildAt(i);
if (child instanceof Button) {
if (((Button) child).getText().equals(currentQuestion.getAnswer())) {
child.setBackgroundResource(R.drawable.right_answer);
}
}
}
}
Thank you very much!

How I can implement a ExpandableListView in java (for Android) that make click display items?

I'm trying to implement a ExpandableListView in java that when click deployment space elements inside, not the typical wish list allows choosing an option. What I try to do is basically something like this
One can see that the spinner "wraps" to have items and does not have a list, Would I could help a little?

You can use ExpandableListView .. check this tutorial http://www.androidhive.info/2013/07/android-expandable-list-view-tutorial/

You can easily create one on your own. Just create a Button and assign a Layout below. When the Button gets clicked set the View of you Layout to Visible and otherwise to Invisible. Additionaly you can set up and down arrows to the right of your Button.
final Button button = (Button) findViewById(R.id.button);
final LinearLayout linearLayout= (LinearLayout) findViewById(R.id.linearLayout);
linearLayout.setVisibility(View.GONE);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if (linearLayout.getVisibility() == View.VISIBLE) {
linearLayout.setVisibility(View.GONE);
button.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.expand, 0);
} else {
linearLayout.setVisibility(View.VISIBLE);
button.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.collapse, 0);
}
}
});