Develop Reference

Not able to pass data between activities.Data is blank

I am trying to pass some data from one activity to another and I have made a toast in the other activity to see if data is being passed.When the toast shows up it is blank.I have done everything right and tried many different times with different methods I have also created another app but the problem still stays.It gives me null.
My java code in the first activity
public class titleandcuisine extends AppCompatActivity implements AdapterView.OnItemSelectedListener {
public static final String TITLE_GET = "title";
public static final String CUISINE_GET = "cuisine";
ImageView imageView;
Button button;
Spinner spinner;
EditText dish;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_titleandcuisine);
dish = findViewById(R.id.editText);
spinner = findViewById(R.id.spinner);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,R.array.cuisines,android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
spinner.setOnItemSelectedListener(this);
button = findViewById(R.id.next);
imageView = findViewById(R.id.close);
imageView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(getApplicationContext(), homepage.class));
}
});
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String text = dish.getText().toString();
String text2 = spinner.getSelectedItem().toString();
Intent data = new Intent(getBaseContext(),imagepost.class);
data.putExtra(TITLE_GET,text);
data.putExtra(CUISINE_GET,text2);
startActivity(data);
}
});
}
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
}
Second activity java code
public class reviewactivity extends AppCompatActivity {
TextView cuisine,title;
ImageView displayimage,back;
Uri myUri;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_reviewactivity);
Intent intent = getIntent();
String titleget = intent.getStringExtra(titleandcuisine.TITLE_GET);
String cuisineget = intent.getStringExtra(titleandcuisine.CUISINE_GET);
Toast.makeText(this, titleget + cuisineget, Toast.LENGTH_SHORT).show();
cuisine = findViewById(R.id.reviewcuisine);
title = findViewById(R.id.reviewtitle);
back = findViewById(R.id.backtopostvideo);
displayimage = findViewById(R.id.reviewdisplaimage);
// cuisine.setText(cuisineget);
// title.setText(titleget);
// myUri = Uri.parse(uri);
displayimage.setImageURI(myUri);
back.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(getApplicationContext(),videopost.class));
}
});
}
}

You need to read the text from the EditText when the button is clicked. Something like:
title = dish.getText().toString(); // Add this
Intent data = new Intent(getBaseContext(),imagepost.class);
data.putExtra(Intent.EXTRA_TEXT, title);
...
One more thing: You are trying to read the Intent.EXTRA_TEXT at the reviewactivity activity. However, nothing is starting that activity (at least within the piece of code that you shared).

call a method in the parent activity after dialog fragment is dismissed

I have a activity which prompts a dialog fragment. I want to call a method in the parent activity when the dialog fragment is dismissed. Here is the activity that contains the dialog fragment.
public class HomScr extends AppCompatActivity {
TextView tv;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.das_boa);
initialize();
}
private void initialize(){
tv = findViewById(R.id.tv);
Button btn = findViewById(R.id.btn);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ProEdiCon dia_fra = new ProEdiCon();
dia_fra.show((this).getSupportFragmentManager(), "pro_edi_con");
}
}
}
private void method_to_run_onDismiss(){
tv.setText("method to run is executed");
Toast.makeText(this, "method to run successfully executed on dismiss Dialog Fragment", Toast.LENGTH_SHORT).show();
}
}
And the below code is the DialogFragment which gets dismissed in certain point and after that the parent activity must call the method to run on dismiss.
public class ProEdiCon extends DialogFragment {
#Override
public View onCreateView(#NonNull LayoutInflater inflater, ViewGroup container, Bundle bun) {
View pro_vie = inflater.inflate(R.layout.pro_edi_dat, container, false);
TextView tv = pro_vie.findViewById(R.id.tv);
tv.setText("I am the Dialog Fragment who is gonna be dismissed soon");
Button btn = pro_vie.findViewById(R.id.btn);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dismiss();
}
}
return pro_vie;
}
}
So can anybody help me do this?

You can use Dialog and set Dismiss listener and listen for the event when dialog will be dismissed
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ProEdiCon dia_fra = new ProEdiCon();
dia_fra.show();
dia_fra.setOnDismissListener(new DialogInterface.OnDismissListener() {
#Override
public void onDismiss(DialogInterface dialogInterface) {
//do some action here
}
});
}
}
and your Dialog will be like this:
public class ProEdiCon extends Dialog {
public ProEdiCon (#NonNull Context context) {
super(context);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.pro_edi_dat);
TextView tv = pro_vie.findViewById(R.id.tv);
tv.setText("I am the Dialog Fragment who is gonna be dismissed soon");
Button btn = pro_vie.findViewById(R.id.btn);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dismiss();
}
});
}
}

You must create interface like this
CallBackListener.java
public interface CallBackListener {
void onDismiss();
}
Then in your fragment
public class ProEdiCon extends DialogFragment {
private CallBackListener callBackListener;
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
//getActivity() is fully created in onActivityCreated and instanceOf differentiate it between different Activities
if (getActivity() instanceof CallBackListener)
callBackListener = (CallBackListener) getActivity();
}
#Override
public View onCreateView(#NonNull LayoutInflater inflater, ViewGroup container, Bundle bun) {
View pro_vie = inflater.inflate(R.layout.pro_edi_dat, container, false);
TextView tv = pro_vie.findViewById(R.id.tv);
tv.setText("I am the Dialog Fragment who is gonna be dismissed soon");
Button btn = pro_vie.findViewById(R.id.btn);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(callBackListener != null)
callBackListener.onDismiss();
dismiss();
}
}
return pro_vie;
}
}
And finally in your Activity
public class HomScr extends AppCompatActivity implements CallBackListener {
TextView tv;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.das_boa);
initialize();
}
private void initialize(){
tv = findViewById(R.id.tv);
Button btn = findViewById(R.id.btn);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ProEdiCon dia_fra = new ProEdiCon();
dia_fra.show((this).getSupportFragmentManager(), "pro_edi_con");
}
}
}
private void method_to_run_onDismiss(){
tv.setText("method to run is executed");
Toast.makeText(this, "method to run successfully executed on dismiss Dialog Fragment", Toast.LENGTH_SHORT).show();
}
#Override
public void onDismiss() {
method_to_run_onDismiss();
}
}

You might want to use a DialogListener interface inside your Dialog class and call it before the dialog is dissmissed.
Interface with your method
public interface MyInterface {
void method_to_run_onDismiss();
}
Dialog - create an instance of the interface and call it right before dismiss();
public class ProEdiCon extends DialogFragment {
private MyInterface myInterface;
#Override
public View onCreateView(#NonNull LayoutInflater inflater, ViewGroup container, Bundle bun) {
...
myInterface = (MyInterface) context;
Button btn = pro_vie.findViewById(R.id.btn);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
myInterface.method_to_run_onDismiss();
dismiss();
}
}
return pro_vie;
}
}
Activity class implement the interface and use the method you already have
Public class HomScr extends AppCompatActivity implements MyInterface {
TextView tv;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.das_boa);
initialize();
}
private void initialize(){
tv = findViewById(R.id.tv);
Button btn = findViewById(R.id.btn);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ProEdiCon dia_fra = new ProEdiCon();
dia_fra.show((this).getSupportFragmentManager(), "pro_edi_con");
}
}
}
private void method_to_run_onDismiss(){
tv.setText("method to run is executed");
Toast.makeText(this, "method to run successfully executed on dismiss Dialog Fragment", Toast.LENGTH_SHORT).show();
}
}

sending and receiving the selected spinner information from one activity to another activity

I have 10 spinners and one button. By clicking button activity A is going to another activity B and I want to add the selected information from spinners to send from activity A to activity B by clicking that button and want to display selected spinners info in activity B.
Here is my code (activity A) :
public class Firstactivity extends MainActivity {
private Button btn;
private Spinner spin;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.third_layout_main);
btn= (Button)findViewById(R.id.btn1s);
spin=(Spinner)findViewById(R.id.spinner1);
final String arr[] = {"NONE"," 1*£5.49","2*2.00","3*4.00"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(Firstactivity.this, android.R.layout.simple_dropdown_item_1line, arr);
spin.setAdapter(adapter);
spin.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
Toast.makeText(Firstactivity.this, "the item selected "+arr[arg2],Toast.LENGTH_SHORT).show();
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
//TODO Auto-generated method stub
}
});
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent inte = new Intent (Firstactivity.this, Finalorder.class);
String Text = spin.getSelectedItem().toString();
startActivity(inte);
}
});
}}
Activity B :
public class Finalorder extends MainActivity {
Bundle Bundle;
TextView txt;
Button btn;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.last);
Bundle=getIntent().getExtras();
btn=(Button)findViewById(R.id.btn1s);
Bundle=getIntent().getExtras();
txt.setText(Bundle.getString("SPINNERVAL"));
}
}

You need to create your custom serializable or parcelable object with all spinners values. And transfer it through activity.
Something like that:
public class SpinnersData implements Serializable
{
private String spinner1;
private String spinner2;
//....
private String spinner10;
public String getSpinner1()
{
return spinner1;
}
public void setSpinner1(String spinner1)
{
this.spinner1 = spinner1;
}
public String getSpinner2()
{
return spinner2;
}
public void setSpinner2(String spinner2)
{
this.spinner2 = spinner2;
}
public String getSpinner10()
{
return spinner10;
}
public void setSpinner10(String spinner10)
{
this.spinner10 = spinner10;
}
}
Put it to intent in one activity:
SpinnersData data = new SpinnersData();
data.setSpinner1(spinner1.getSelectedItem().toString());
data.setSpinner2(spinner2.getSelectedItem().toString());
....
yourIntent.putExtra("someKey", data);
And get in another activity in onCreate():
SpinnersData data = (SpinnersData) getIntent().getExtras().getSerializable("someKey");
Now you can use this object to display information here.

Viewpager setCurrentItem() doesn't update onPageSelected()

When I swipe between questions, it loads current page number correctly
BUT when I use next button, first click doesnt loads pagenumber ( I mean onPageSelected() doesnt work.) second and other clicks loads content but it loads 1 page previous.
#Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setContentView(R.layout.activity_main);
mPager = (ViewPager)findViewById(R.id.pager);
QuestionPagerAdapter mAdapter = new QuestionPagerAdapter();
mPager.setAdapter(mAdapter);
OnPageChangeListener pageChangeListener = new OnPageChangeListener() {
#Override
public void onPageScrollStateChanged(int arg0) { }
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) { }
#Override
public void onPageSelected(int position) {
tv.setText( mPager.getCurrentItem()+"");
}
};
mPager.setOnPageChangeListener(pageChangeListener);
Question.next.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
mPager.setCurrentItem(getItem(+1));
}
}
private int getItem(int i) {
int a = mPager.getCurrentItem();
i += a;
return i;
}
});

Why not just doing this in your listener:
mPager.setCurrentItem(mPager.getCurrentItem() + 1);

How to call activity from the items of the spinner

I have a page which consist of a spinner and a submit button. What I want to achieve is when user selects an item in the list and click on submit, it should take him to an other layout having a webview. Each item in the spinner should open different .html page in the layout.
What I have now is the item is being selected from the spinner, but I'm not sure how to perform onclick listener to it...
code for main activity.java is:
public class beef extends Activity {
private Spinner spinner1;
private ImageButton btnSubmit;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.beef);
addListenerOnButton();
addListenerOnSpinnerItemSelection();
}
public void addListenerOnSpinnerItemSelection(){
spinner1 = (Spinner) findViewById(R.id.spinner1);
spinner1.setOnItemSelectedListener(new CustomOnItemSelectedListener());
}
//get the selected dropdown list value
public void addListenerOnButton() {
spinner1 = (Spinner) findViewById(R.id.spinner1);
btnSubmit = (ImageButton) findViewById(R.id.imageButton1);
btnSubmit.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if(v.getId() == btnSubmit.getId())
{
Intent intent = new Intent(beef.this,display.class);
intent.putExtra("urlpath", "animalbites.html");
startActivity(intent);
}
}
});
}
}
code of CustomOnItemSelectedListener.java is:
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
if (arg2 == 0) // First item selected
{
//Here I need to give an id for the .html file
}
else if (arg2 == 1) // Second
{
//Here I need to give an id for the .html file
}
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
and the display.java is:
public class display extends Activity implements OnClickListener {
private WebView webView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.webview);
Intent intent=getIntent();
String mUrl=intent.getStringExtra("urlpath");
webView = (WebView) findViewById(R.id.webview);
webView.getSettings().setJavaScriptEnabled(true);
webView.loadUrl("file:///android_asset/www/"+mUrl);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
}

i am not exactly getting your problem, but i ll answer according to what i got:
Why are you concerned of adding an onClickListener to the spinner?
Just add onClickListener to the button and on the click of that button do:
String selecteditemName=(String)spinner1.getSelectedItem();
//spinner1 having items : "file1" , "file2"
Intent i=new Intent(this, yournewActivity.class);
i.putExtra("selected_item", selecteditemName);
startActivity(i);
Now in that activity (yournewActivity) containing the webview use this code in onCreate() method:
String item;
Intent i=getIntent();
item = i.getStringExtra("selected_item");
Now you have your spinner selection in the String 'item', you can now do whatever you want:
My point is that : You should use your spinner selection as ID for populating the webview.
If you still want to use any IDs other than the ones present in the spinner then
make an extra java class Idgetter,
class idgetter
{
public static String getID(String name)
{
if(name.equals("file1"))
return "requiredfile1.html";
else if(name.equals("file2"))
return "requiredfile2.html";
}
}
Now, Do exactly as the above code says and after you have the spinner selection in the variable item , use:
String id=idgetter.getID(item); //in younewActivity
You are finally done.

By using Intent's putExtra method.
Intent mIntent = new Intent(this, display.class);
mIntent.putExtra("urlpath", "put value in here");
startActivity(mIntent);

Populate the spinner with number of html pages and Use spinner.getSelectedItem().toString() inside the addListenerOnButton() method. By doing do, you will get the selected html page and pass it using intent to the next layout.
CODE:
`public class beef extends Activity {
private Spinner spinner1;
private ImageButton btnSubmit;
int final websiteA = 1;
int final websiteB = 2;
int final websiteC = 3;
String selectedHtmlPage = "";
.........
.........
.........
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
long arg3)
{
switch(arg2)
{
case websiteA :
selectedHtmlPage = "websiteA.html";
break;
case websiteB :
selectedHtmlPage = "websiteB.html";
break;
case websiteC :
selectedHtmlPage = "websiteC.html";
break;
}
}
public void addListenerOnButton()
{
btnSubmit = (ImageButton) findViewById(R.id.imageButton1);
btnSubmit.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v)
{
if(v.getId() == btnSubmit.getId())
{
Intent intent = new Intent(beef.this,display.class);
intent.putExtra("urlpath", selectedHtmlPage);
startActivity(intent);
}
}
});
}
}`

Solved it, its simple. Here is what I did:
public void addListenerOnSpinnerItemSelection(){
spinner1 = (Spinner) findViewById(R.id.spinner1);
spinner1.setOnItemSelectedListener(this);
}
- - -
#Override
public void onClick(View v) {
if(v.getId() == btnSubmit.getId())
{
Intent intent = new Intent(beef.this,display.class);
intent.putExtra("urlpath", mLink);
startActivity(intent);
}
}
});
}
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
if(arg2==0){
mLink="Beef html/BBQ_Meatballs_Recipes.html";
}
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}