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Can't dismiss a popup window (other solutions do not work)

I am trying to create a simple PopupWindow with a text entry field.
I know there are many questions of this type, but none seem to solve my problem. This is the XML of my popup layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:background="#color/white"
android:gravity="center"
android:padding="15dp"
android:layout_gravity="center"
android:layout_height="wrap_content">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Dodaj produkt po identyfikatorze"
android:textSize="15sp"
android:gravity="center"
/>
<EditText
android:layout_width="match_parent"
android:textSize="20sp"
android:hint="Identyfikator"
android:minWidth="250dp"
android:id="#+id/insert_edit"
android:gravity="center"
android:layout_height="match_parent" />
<LinearLayout
android:layout_width="match_parent"
android:gravity="center"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:layout_width="wrap_content"
android:gravity="center"
android:layout_height="wrap_content"
android:id="#+id/insert_ok"
android:text="OK"/>
<Button
android:layout_width="wrap_content"
android:gravity="center"
android:layout_height="wrap_content"
android:id="#+id/insert_cancel"
android:text="Anuluj"/>
</LinearLayout>
</LinearLayout>
Now, I want to create this layout in my main activity when a FAB is pressed. This is how I do it:
public class ScrollingActivity extends AppCompatActivity {
private ActivityScrollingBinding binding;
private int ACTIVITY_LOAD_DATABASE = 1;
AbstractDatabase database;
RowAdapter rowAdapter;
ListView listView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
database = Room.databaseBuilder(getApplicationContext(), AbstractDatabase.class, "magazyn_db")
.allowMainThreadQueries().build();
binding = ActivityScrollingBinding.inflate(getLayoutInflater());
setContentView(binding.getRoot());
FloatingActionButton fab = binding.addCode;
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Log.println(Log.INFO, "VIEWs", "Showing popup");
PopupWindow codePopup;
View popupView = getLayoutInflater().inflate(R.layout.insert_code, binding.getRoot());
codePopup = new PopupWindow(popupView);
codePopup.setFocusable(true);
codePopup.setOutsideTouchable(true);
View cancelButton = codePopup.getContentView().findViewById(R.id.insert_cancel);
cancelButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
codePopup.dismiss();
}
});
View acceptButton = codePopup.getContentView().findViewById(R.id.insert_ok);
acceptButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
View editView = codePopup.getContentView().findViewById(R.id.insert_edit);
String id = ((EditText)editView).getText().toString().trim();
insertNewElement(id);
codePopup.dismiss();
}
});
}
});
[...]
For an unknown reason my popup doesn't go dismissed, both when I click outside of it, or press the cancel button (when I tried to print some logs from the handler, they worked). I have tried many solutions, also inflating it with no root, but then 'showAtPosition' doesn't even show it, and no solutions here on stackoverflow seem to help me even though there are many of them.
Is anyone able to point the problem here?

public void dismiss () Disposes of the popup window. This method can be invoked only after showAsDropDown(android.view.View) has been executed. Failing that, calling this method will have no effect.

Problem with button.setOnclickListener(this)

I started learning android, I'm trying to make a login activity but my buttons doesn't work for any reason.
I have implemented view.OnClickListener in my class
Here's my java code :
public class Login extends AppCompatActivity implements View.OnClickListener{
private Button btn_login, btn_reset;
private EditText et_username, et_pwd;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
btn_login = (Button) findViewById(R.id.bt_login_login);
btn_login.setOnClickListener(this);
btn_reset = (Button) findViewById(R.id.bt_log_reset);
btn_reset.setOnClickListener(this);
et_username = (EditText) findViewById(R.id.et_log_username);
et_pwd = (EditText) findViewById(R.id.et_log_password);
}
#Override
public void onClick(View v) {
Log.w("test","test");
switch(v.getId()){
case R.id.bt_login_login :
DisplayData();
break;
case R.id.bt_log_reset :
resetData();
break;
}
}
I was wondering if this was not caused by the fact that my buttons are in a tree like this :
activity_login.xml :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".Login">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/txt_username"/>
<EditText
android:id="#+id/et_log_username"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/txt_login"/>
<EditText
android:id="#+id/et_log_password"
android:layout_width="match_parent"
android:inputType="textPassword"
android:hint="#string/pwd"
android:layout_height="wrap_content" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center_horizontal|center_vertical"
>
<Button
android:id="#+id/bt_login_login"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/intro_login"/>
<Button
android:id="#+id/bt_log_reset"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/reset"/>
</LinearLayout>
</LinearLayout>
Ps : I may have a bad english, sorry for the inconvenience

make sure that your activity implements View.OnClickListener
everything else seems fine.

You can try a different approch. You can pass an anonymous class implementation of OnClickListener when using setOnClickListener.
Another way to do it is define an onClick attribute in the xml for each button, give it a functions name. You will have to have a function with the exact name in the activity for the function to be triggered (Android Studio will not let the project compile without a proper connection between them.)
The anonymous class implementation is prefered, as you will not be able to declare events in the xml all the time (when using fragments for example).
to implement an anonymous class in the setOnclickListener do this:
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//stuff to do when the button was clicked goes here.
}
});

Cannot Start another activity after click the Button (android)

I cannot start my activity (Display Message) when I click the button that show in activity_main.xml. I have try fix the problem in onClick but still cannot Run it. Can I know what is the problem ? Thank You.
Here are the code :
MainActivity.java
public class MainActivity extends AppCompatActivity{
public Button but1;
public void init(){
but1= (Button)findViewById(R.id.button1);
but1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent display = new Intent(MainActivity.this, DisplayMessage.class);
startActivity(display);
}
});
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Spinner mySpinner = (Spinner) findViewById(R.id.spinner1);
ArrayAdapter<String> myAdapter = new ArrayAdapter<String>(MainActivity.this,android.R.layout.simple_list_item_1, getResources().getStringArray(R.array.products));
myAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
mySpinner.setAdapter(myAdapter);
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Spinner
android:id="#+id/spinner1"
android:layout_width="358dp"
android:layout_height="38dp"
android:elevation="5dp"
android:layout_margin="5dp"
android:padding="10dp"
/>
<Button
android:id="#+id/button1"
android:layout_width="150dp"
android:layout_height="wrap_content"
android:layout_gravity="center|bottom"
android:text="Confirm" />
</LinearLayout>

It looks like you never called init() from your onCreate() method. Therefore, but1 was never initialized and OnClickListener was never set.

How to make one ImageView invisible when another clickable ImageView is pressed?

I tried to make ImageView(bul1) disappear when ImageView(Seethrough) is pressed. I get a nullpointer error when i try to run this code. What is wrong with it?
JAVA code
public class MainActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final ImageView seethrough1 = (ImageView) findViewById(R.id.Seethrough);
final ImageView view1 = (ImageView) findViewById(R.id.bul1);
seethrough1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(view1.getVisibility() == View.VISIBLE)
{
view1.setVisibility(View.INVISIBLE);
}
}
});
}
XML code
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:layout_width="match_parent"
android:layout_height="300dp"
android:paddingBottom="6dp"
android:src="#drawable/gun"
android:clickable="true"
android:id="#+id/Seethrough"
android:onClick="next"
/>
<ImageView
android:layout_width="30dp"
android:layout_height="wrap_content"
android:src="#drawable/bullet"
android:id="#+id/bul1"
/>
</LinearLayout>

You need to reconcile seethrough's onClickListener with its onClick XML attribute. I'd suggest removing this line from the xml:
android:onClick="next"
and placing the code inside your next method (if you have one)
public void next (View v){
some code
}
behind or before your visibility checking if, whichever suits you more:
#Override
public void onClick(View v) {
//place some code here
if(view1.getVisibility() == View.VISIBLE){
view1.setVisibility(View.INVISIBLE);
}
//or here
}

I think their is problem with out xml code, please try writing xml as follows,
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:layout_width="match_parent"
android:layout_height="300dp"
android:paddingBottom="6dp"
android:src="#drawable/gun"
android:clickable="true"
android:id="#+id/Seethrough"
android:onClick="next"
/>
<ImageView
android:layout_width="30dp"
android:layout_height="wrap_content"
android:src="#drawable/bullet"
android:id="#+id/bul1"
/>
</LinearLayout>

If it return NullPointerExeption, I think your ImageView is Null, because
setContentView(R.layout.activity_main);
and activity_main.xml is not like contents of your post, check name of layout and try again.

I found out that I was supposed to declare the imageviews inside the method instead of before.
like this
public void onClick(View v) {
ImageView seethrough1 = (ImageView) findViewById(R.id.Seethrough);

Java/Android change text inside layout from a fragment

I have a problem with my first application,this is also my first question,i have 2 activity and 2 layout
this is the MainActivit.java
public class MainActivity extends TabActivity {
TabHost tabHost;
public static int meth;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
LoadAllVar();
UpdateHud(meth);
TabSwitcher();
}
public static int LoadAllVar(){
//Load all var from files (not added for now)
meth = 200;
return meth;
}
private void UpdateHud(int meth){
String methstring = Integer.toString(meth);
TextView textSell = (TextView)findViewById(R.id.textMethCount);
textSell.setText(methstring);
}
public void TabSwitcher() {
tabHost = getTabHost();
TabHost.TabSpec tab1spec = tabHost.newTabSpec("Tab1");
tab1spec.setIndicator("Cook");
Intent firstintent = new Intent(this, CookTab.class);
tab1spec.setContent(firstintent);
tabHost.addTab(tab1spec);
}
}
and this is the second Activity
public class CookTab extends Activity {
public static int meth;
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.cooktab);
LoadVarFromCook();
CheckCookClick();
}
public void LoadVarFromCook (){
meth = LoadAllVar();
String methstring = Integer.toString(meth);
Toast.makeText(getApplicationContext(),methstring,Toast.LENGTH_SHORT).show();
}
public void CheckCookClick (){
Button buttoncook = (Button) findViewById(R.id.buttonCook);
buttoncook.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v){
meth = meth + 1;
Toast.makeText(getApplicationContext() , "+1" , Toast.LENGTH_SHORT).show();
//HERE I NEED TO UPDATE THE VALUE OF METH INSIDE THE ACTIVITY_MAIN.XML
}
});
}
}
this is the MainActivity layout
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TabHost
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:id="#android:id/tabhost">
<TabWidget
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#android:id/tabs"></TabWidget>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#android:id/tabcontent"></FrameLayout>
</TabHost>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="100dp"
android:layout_alignParentBottom="true"
android:id="#+id/layoutHUD">
<TextView
android:layout_width="50dp"
android:layout_height="40dp"
android:id="#+id/textMethCount"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginLeft="28dp"
android:layout_marginStart="28dp" />
</RelativeLayout>
</RelativeLayout>
and this is the second tab layout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="100dp"
android:layout_height="60dp"
android:id="#+id/textMeth"
android:layout_marginTop="250dp"
android:layout_marginLeft="145dp"
android:text="Meth"
android:gravity="center"
android:textSize="29dp"
android:textStyle="bold"/>
<Button
android:layout_width="100dp"
android:layout_height="60dp"
android:id="#+id/buttonCook"
android:layout_below="#+id/textMeth"
android:layout_alignLeft="#+id/textMeth"
android:layout_alignStart="#+id/textMeth"
android:text="Cook"/>
</RelativeLayout>
I need to change the text inside a TextView located inside the activity_main.xml when i press a button inside the cooktab.xml how can i do that? findViewById() dosen't work
P.S. for now i add only one tab ,i will add more tab but for now i think about the first one

Try using EventBus it allows you to call functions in other parts of your app. Alternatively use a standard java interface link

I resolve the problem following this tutorial http://mrbool.com/how-to-create-an-activity-android-with-a-tabhost-view/27990