Android-activity Questions

Now i'm trying to make like a instagram chat program using firebase the problem is i want to show that member login status but android life cycle

I have the next part of code in which i need to know from what type of activity was the context passed: activity activity;

The following code is from head first android. it is for a stopwatch app. i have a few questions in the following code: the

I'm creating an event app which contains a list of events in recyclerview. the events recyclerview consists of

I'm currently developing an app for a client that is supposed to launch when it's charging. the only way that i know to do this is with the

I need to know when the screen gets visible in the app how can i get to know which activity is related to that screen. especially if i'm using

I implemented an app using nfc which has url link. so, when nfc is on, the mobile detects url and opens my app. i made it happen like

I am in the process of building an app and have a navigation menu in my first activity, however, when i go to the second it doesn't show, so which

Now i'm trying to the transparent opensource expandable layout but the problem is that source made by activity but i want to apply my fragment

I'm creating an android app in which there will be around 20-25 screens. if i create an activity for each screen it won't be feasible. what should

I implemented night mode in my app.user can change the night mode settings in profile activity.the order of activities are as follows.

I am having troubles and i can't figure out what the problem is. there is no alert in my code, neither a red line or something.

I draw a view that is not attached to any parent. it's a decoration for a recyclerview. the view sticks to the bottom and disappears when

I've activity a -> fragment a [from fragment a i decide to create activity b]

I wonder if there is any way to show a progressbar at the middle of the screen programatically regardless the type of layout of the

I'm making an android application for information of different places. there are more than 200 places. so creating each activity for each place is

Bank app: i have a navigationdraweractivity which has more fragments. each fragment is created after menu item is clicked.

I have an activity that very quickly has to process data and then return to the previous activity, i give an example: i have a mainactivity class

I have a mainactivity where i start (via button click) another second activity: val intent = intent(activity,

What i am trying to do is start an activity in my adapter but it seems that i'm getting an error on my other adapter.

Updated- the code in the question works now i'm trying to run a function after clicking on a button. the function updates an array and i

I searched a lot on stackoverflow and more generally on google for explanations about the use of contexts in the android environment, but i

I am trying to make an activity which will hold all the recents screen in my app not in the android device. the idea it is to create

I'm trying to backup tables from my database when onupgrade method is called. i' m using the solution provided here

In my android app i have a multi step login procedure: enter a id, and send to backend: firstcall(id) if id

As we know android would kill a paused activity in some conditions. and there is a fifo back stack of activities.

So i've been learning and working with android transitions and animations. so i would like to know how can i achieve

My problem is exactly like this link

I am trying to create a baseactivity with navigation drawer and extend it in other activities so that i can reuse the the navigation drawer

I did a simple sample with 3 activities: activitya activityb

I have a navigation drawer activity, that have automatically generated these activity_student_home2,

I am trying to call the finish() method to close the activity when the user inserts nothing in the edittext field and

After clicking on notification, wrong activity is being oppended - main application activity, but not my goal activity - nearphotoactivity.

Have some problem with fullscreen activities, in all activitis i use the code below to make it fullscreen.

Okay lets say we have 2 activities such as mainactivity(ma) and secondactivity(sa) ma is the user interface that takes name,number from the user.

I have a problem, when i startactivityforresult to take picure, resultcode is always activity.result_canceled (0) if there is two or more camera

I got a problem with multitasking, its probably a stupid question but after looking for hours an answer, i dont know how to do it everybody seems

I have 2 activities. 1st activity has got 3 buttons. these buttons have text as c1, c2 and c3. for example, if i click button2, second activity

I have an app and i want to get all the running activities list in the listview and select any activity from the list and that activity will go to

I got the strangest error in my google play console yesterday. i have a button that opens up directions in the google map app. had it for

I'm create app with 2 activity and want set theme onclick button in first and second activity. method settheme() work only on first

Hello friends i am creating mp3 player application my application is successfully build i want implement click event notification when user goes

I want to operate some functionality of my activity class from another class. because my the number of codes in activity class is increasing and

I have an activity with no layout. i set it like a theme directly in androidmanifest:

I have 10 similar buttons in a layout (create_new.xml) which will be distinguished based on the tag attribute: <button

I have just started learning to use android studio and using examples of login and registration codes given in various blogs. problem:

This is my manifest file when i run the app it says "main activity is not declared in androidmanifest.xml" i tried rebuilding,invalidate

In my application,i want to jump to the system's location setting page. by running adb shell dumpsys activity activities | grep

Losing data on the way when passing it through bundle, i get attempt to invoke virtual method 'java.lang.string

In our application we have a special buttons which takes the user to network settings page. we use the following code intent

I'm building an app with cordova and right now i'm focussed on a background service. i need that service for notifcations and to update them

Re-edit: for those interested the method for onclick was resolved below. turns out you cannot create separate classes for controls so the button

I have 2 activity. one is alertdialogactivity & second is mainactivity. i extend alertdialogactivity in

I want to set an if condition in an android studio. please help me to implement this. logic like this if (emailid =

My flow of activity is like this. in fragment a, it allow user to capture image, and the image will be displayed on

What will be better: set transparent color in the fragments and then use color from the activity_main.xml or set color

I was left with some questions regarding viewmodels after reading this:

I wanted to ask about the activity's lifecycle. if an activity is going to the background, or the user pressed the home button so the

My firebase authentification is email based (login and registration requires just an email and password) that firebase manages afterwards.

I want to override onbackpressed() but after onclick event. @override public void onbackpressed() { //toast

I known, that this question is already exist in this site and others, but i still try find a solution, because so far every solution is failed.

Trying to use activity-alias for using multiple icons for my application. this is my manifest code : <activity

In the time i have spent learning android development, i have realized that the use of "context" is a common theme in nearly everything we do.

I have an app that has an specific task process of 3 steps, which are 3 different activities, when the process is done, there's an activity that

My application is unusual: when it starts up, it simply displays a toast message. that is, i have to click on the launch icon, see toast and

I am using mvvm to develop a app, but i cannot start activity from androidviewmodel. in layout i have a reference to the androidviewmodel

We have homeactivity which is navigationdrawyer activity where there are many options like jobs and policies.if he clicks on jobs for the first

I have created an activity that i am using for barcode scanning. the oncreate looks like this: public class

I am using an external library in our project. that library showing notification. on tapping that notification starts activity in the library.

In this program i have three activities main, second and third. when the app opens there is a blank textview and button. selecting that button

Problem: on sending data from activity2 to activity1 using interface results in non-assignment

I was reading about declaring

I have implemented a simple timer with countdowntimer on my game and i need it to start ater a few seconds when the activity is started.

If we open android

I have an activity where a user put his nickname. i want to not be able to go back after this. i have tried everything but no luck. tried so far

I have an application that i want to create an instantapp for it. i successfully apply changes to my project and it builds

In my app, i have to call an activity method from the fragment. i know i can do this in two ways: 1. via sending a

Push notification code using fcm sends title and message as notification text in android and when i click on the text, it takes me to the app

As you may see that [email protected] or [email protected] is valid while starting activity in

I just want to call a method (which is declared in an adapter) from an activity . is there any possible way to do it?

App is killed by os(low memory) and it's activity stack is saved to disk. if the app isn't opened again within a specified amount of time, is the

I need help in this kotlin code pls ... i have checkconnctivvity() function and it's working perfectly ... fun

Activity_main.xml: <?xml version="1.0" encoding="utf-8"?> <android.support.constraint.constraintlayout

First, i've been looking for the answer all over, but didn't find anything that can explain how to resolve my case. i want to declare a

I'm currently learning the activity lifecyle. i noticed the following: i have two activitys, a and b. when i open

I need to open one activity from several different points in the app. let's say from settings fragment, main activity and navigation drawer

I have a problem in my application when i click back activity called two times , when my application idea is : 3 activities

When my activity is running if the user presses backpressed, the activity is dismissed and it is not visible in the recent apps list. i want it to

I see a lot of questions like this but none of them helped me to solve the issue. what's my issue is android studio able to build apk

Lets say my default activity is mainactivity and i start another activity depositactivity without using

I capture key events (from an external keyboard) within my app. i use onkeydown() method from activity. in my app i

I have a subactivity that can be open from my mainactivity. for some reasons, when the user clicks on the back button go back to my

This is the code when i apply that code application has been stopped occurred this code is to find relative prime in android application

I have an issue please help me out. i am building an android application and i have successfully integrated rewarded video ads to it. i

I am unable to set the view size matching the display size, below is the code, it is a transparent view

I tried several things, such as: intent i = new intent(this, myactivity.class); startactivity(i) where it tells me

I have 4 activities: mainactivity (launcher) - checks if user is logged in then start containeractivity else introactivity

Here what i want is i have a fragment inside an activity and it has a web view which is basically chat to customer service. this activity will be

I'm learning how to make an app with google sign-in capabilities from the tutorial