I am trying to get my button to display a dialog box. When clicking, it does nothing.
Here is my code:
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#Override
public void onClick(View view) {
Button btn = (Button) findViewById(R.id.btnHelloWorld);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
AlertDialog.Builder dialog = new AlertDialog.Builder(this);
dialog.setTitle("Made by");
dialog.setMessage("Justin Rhinehart\nMGMS | APM\n5/4/2021");
dialog.setPositiveButton(" OK ", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id ) {
dialog.dismiss();
}
});
dialog.show();
}
});
}
}
Any help would be appreciated as I am new to Java.
You have to bind the click in the onCreate method (and this is what you probably want):
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btn = (Button) findViewById(R.id.btnHelloWorld);
btn.setOnClickListener(this)
}
#Override
public void onClick(View view) {
AlertDialog.Builder dialog = new AlertDialog.Builder(this);
dialog.setTitle("Made by");
dialog.setMessage("Justin Rhinehart\nMGMS | APM\n5/4/2021");
dialog.setPositiveButton(" OK ", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id ) {
dialog.dismiss();
}
});
dialog.show();
}
}
But code can work in many different ways... for example in theonCreate function you could just have done this.onClick(null) and probably your code might have worked also, but I would not recommend it, because there will be no sense at that point to the implements View.OnClickListener
Related
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();
}
}
I have researched similar problems but none is a fit for this problem. Am trying to access the arrays of drawables from the method name called nextQuestion(), but i keep getting the error cannot resolve symbol 'ballArray' any help please. I just feel that this should work but don't know why. Here is my code.
public class MainActivity extends AppCompatActivity {
ImageView mBallDisplay;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
int quote;
mBallDisplay = (ImageView) findViewById(R.id.image_eightBall);
Button nextbutton = (Button) findViewById(R.id.nextbutton);
Button prevbutton = (Button) findViewById(R.id.prevbutton);
final int[] ballArray = {
R.drawable.ball1,
R.drawable.ball2,
R.drawable.ball3,
R.drawable.ball4,
R.drawable.ball5
};
//next button
nextbutton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
nextQuestion();
}
});
//previous button
prevbutton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
prevQuestion();
}
});
}
private void nextQuestion(){
mBallDisplay.setImageResource(ballArray[4]);
}
private void prevQuestion(){
}
}
The reason you can't access ballArray from within nextQuestion() is because it's declared in a separate method. If you want it accessible from within nextQuestion(), you would need to make it visible at that level:
ImageView mBallDisplay;
final int[] ballArray = {
R.drawable.ball1,
R.drawable.ball2,
R.drawable.ball3,
R.drawable.ball4,
R.drawable.ball5
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
int quote;
mBallDisplay = (ImageView) findViewById(R.id.image_eightBall);
Button nextbutton = (Button) findViewById(R.id.nextbutton);
Button prevbutton = (Button) findViewById(R.id.prevbutton);
//next button
nextbutton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
nextQuestion();
}
});
//previous button
prevbutton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
prevQuestion();
}
});
}
private void nextQuestion(){
mBallDisplay.setImageResource(ballArray[4]);
}
private void prevQuestion(){
}
}
Do like this:-
public class MainActivity extends AppCompatActivity {
ImageView mBallDisplay;
int[] ballArray = {
R.drawable.ball1,
R.drawable.ball2,
R.drawable.ball3,
R.drawable.ball4,
R.drawable.ball5
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
int quote;
mBallDisplay = (ImageView) findViewById(R.id.image_eightBall);
Button nextbutton = (Button) findViewById(R.id.nextbutton);
Button prevbutton = (Button) findViewById(R.id.prevbutton);
//next button
nextbutton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
nextQuestion();
}
});
//previous button
prevbutton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
prevQuestion();
}
});
}
private void nextQuestion(){
mBallDisplay.setImageResource(ballArray[4]);
}
private void prevQuestion(){
}
}
I have made a list of titles but not attached the numbers to be given according to the titles.
I want to give the numbers and made call on them according to the user will call on select.
I am making a emergency number app and want to give the numbers with the titles in app, when the user will select a number according to need he will call ..
please guide me
This is my code:
MainActivity.class
public class MainActivity extends Activity {
static final int PICK_CONTACT_REQUEST = 1; // The request code
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button EmergencyBtn = (Button) findViewById(R.id.button);
EmergencyBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent emerIntent = new Intent(MainActivity.this, EmergencyContacts.class);
startActivity(emerIntent);
}
});
EmergencyContacts.class
public class EmergencyContacts extends ListActivity {
static final String[] EmergencyNumbers = new String[]{
"Ambulance","Hilal-e-Ahmar","Edhi Trust","Bomb Disposal","Board of Secondary Education",
"Chambers of Commerce & Industry","Civil Defence","Civil Secretariat","Export Promotion ",
"Bureau","Fatmid Blood ","Transfusion ","Fire Brigade Center","General post office(GPO)",
"Govt. transport(GTS)","Hospital Civil(casualties)","Hospital services (Casualties)",
"Income Tax","Metropolitan corp.","News Agency(APP)","Police Emergency","Railway Station (City)",
"PIA Flight Enquiry","PIA Reservation","PIA Cargo","Passport Office","PTV ","Pakistan Tourism Dev. Corp.",
"PAF (Recrut)","Pakistan Army (Recruiting)","Pakistan Navy (Recruiting)","Radio Pakistan","Railway Enquiry",
"Railway Reservation (Cantt.)","Railway Reservation (city)","Sui Gas Complaints","Time Enquiry",
"Telephone Enquiry","Telephone Complaints","Trunk Overseas ","Booking","Trunk inland Enquiry","Phonogram",
"Overseas Booking","Overseas Enquiry","Telegraph Enquiry","Text Book Board","University","University Allama Iqbal",
"University of Engin and Tech","Weather (Enq)","Wapda (Enq)","PAKISTAN TOURISM DEV. CORP","PAKISTAN ARMY (RECRUITING)",
"PAKISTAN NAVY (RECRUITING)"
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,EmergencyNumbers));
getListView().setTextFilterEnabled(true);
}
public void onListItemClick(ListView l, View v,int position,long id){
//TODO Auto generated method stub
super.onListItemClick(l,v,position,id);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Are you sure you want to Call to?"+"\n"+getListView().getItemAtPosition(position))
.setCancelable(false)
.setPositiveButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
}
})
.setNegativeButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// EmergencyContacts.this.finish();
Intent callTo = new Intent(EmergencyContacts.this,CallTo.class);
startActivity(callTo);
}
});
AlertDialog alert = builder.create();
alert.show();
}
callTo.class
public class CallTo extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_call_to);
Button button = (Button) findViewById(R.id.button6);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(Intent.ACTION_DIAL);
String p = "tel:" + getString(R.string.phone_number);
i.setData(Uri.parse(p));
startActivity(i);
}
});
}
Use this
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_call_to);
Button button = (Button) findViewById(R.id.button6);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_CALL);
String number = getString(R.string.phone_number);
intent.setData(Uri.parse("tel:" + number));
startActivity(
Intent.createChooser(intent, "Choose a Call client :"));
}
});
}
Happy to help
I have a MainActivity like this one below:
My question is how to open a DialogFragment clicking on the TextView "click HERE to give a name to the task" placed next to "play" button.
Here is the code of my TextView:
TextView buttonView = new TextView(this);
buttonView.setHint("click HERE to give a name to the task");
buttonView.setX(50);
buttonView.setY(50);
and the code of the DialogFragent:
public class ButtonNameDialogFragment extends DialogFragment {
private IFragment iButNamFrag;
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
AlertDialog.Builder setButNameAlert = new AlertDialog.Builder(getActivity());
setButNameAlert.setTitle("Set Task name");
LayoutInflater inflater = getActivity().getLayoutInflater();
setButNameAlert.setView(inflater.inflate(R.layout.button_name_fragment, null))
.setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// TODO Implement dialogPositiveClick
}
})
.setNegativeButton(R.string.undo, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// TODO Implement dialogNegativeClick
}
});
return setButNameAlert.create();
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
iButNamFrag = (IFragment) activity;
}
}
and here is the interface:
public interface IFragment {
public void onDialogPositiveClick(DialogFragment dialog);
public void onDialogNegativeClick(DialogFragment dialog);
}
You can set an onClickListener to any view in Android and then perform any behavior you would like
buttonView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// Create new DiaglogFragment and display it
}
};
This is the same method used for any kind of button pressing. There are plenty of other answers already out on StackOverflow with further examples of this. If you need more information on tap recognition or displaying fragments, a quick search will find it on Stack.
buttonView.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
DialogFragment frag = new ButtonNameDialogFragment();
frag.show(*context*, ButtonNameDialogFragment.class.getCanonicalName());
}
});
I'm trying to switch the views, but when I'm in the second view, the back event click doesnt work.. I don't know what's wrong.
Pls, see my code and help me!
Part1
Part2
public class t extends Activity implements OnClickListener {
Button volta;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.janela2);
volta = (Button) findViewById(R.id.button2);
volta.setOnClickListener(this);
}
#Override
public void onClick(View v) {
if (v == volta) {
startActivity(new Intent(t.this, MainActivity.class));
}
}
}
You have to override onBackPressed. Change your MainActivity as below
public class MainActivity extends Activity {
private boolean goBack = false;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button sobre = (Button) findViewById(R.id.button1);
sobre.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
goBack = true;
setContentView(R.layout.janela2);
}
});
}
#Override
public void onBackPressed() {
//If you have switched to R.layout.janela2 then go back
if (goBack){
setContentView(R.layout.activity_main);
goBack = false;
return;
}
//else do default action
super.onBackPressed();
}
}
Just do the following code, I hope it might help you
MainActivity.java
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button sobre = (Button) findViewById(R.id.button1);
sobre.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, t.class);
startActivity(intent);
}
});
}
}
In t.java
public class t extends Activity{
Button volta;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.janela2);
}
#Override
public void onStop() {
super.onStop();
finish();
}
}
If you want two layouts then use viewflipper. If you want two activities (java classes) AND two layouts separately then use:
Intent i = new Intent (this, myClass.class);
startActivity(i);
To start the Activity and NOT setcontentview
So here:
public void onClick(View v) {
startActivity(new Intent (MainActivity.this, t.class));
OR IN THE CASE OF T.CLASS:
startActivity(new Intent (t.this, MainActivity.class));
}
You have to override onBackPressed() method if you want to back button functionality in your application. i.e.
public void onBackPressed() {
Intent start = new Intent(CurrentClass.this,Next_Activity.class);
startActivity(start);
finishActivity(0);
}