Android switch text button? - android

I am developping an app that has some quotes but I am unable to have next/previous buttons to navigate between the quotes like in the attached image ??
can anybody help ?
http://img.technospot.net/Free-Android-app-Success-Quotes.jpg

If the only that that's changing is the quote, just have the next and previous buttons change the text on click to the next quote in the cycle.

I'm assuming you are genarating randoms numbers to show the quotes randomly. Just save the position of the quotes(are they stored in an array?) and save them in an Integers List every time the user clicks next.
List<Integer> intList = new ArrayList<Integer>();
So if the user wants to go back just get the previous number which was shown by accessing the list with :
intList.get(intList.size()-1);
You should provide more informations next time and be as precise as you can.

Related

Android Studio - How to create a back button on randomly selected strings?

I have an array of strings that I am displaying in my activity using a random number every time a button called Next is clicked. How do I create another button called Back, that simply displays the previously or last generated strings in the order they were randomly generated?. So that instead of clicking next to generate another string, I can click Back at any time to view all the previous strings one by one and then click Next again to continue the random selection.
Create a array list of String like
ArrayList<String> arraylist= new ArrayList<String>();
after that using add function add the strings that you are displaying in your activity using a random number every time a button called Next is clicked.
arraylist.add("your_randomly_generated_string");
now your randomly generated string will stored in arraylist one by one
This will store the string now how to retrieve?
following steps may help you not sure ...
While adding the randomly generated string into arraylist initialize the int variable with zero and increment its value after each adding...
public int indexvalue=0;
on your Onclick of NEXT button add two lines
arraylist.add("your_randomly_generated_string");
indexvalue++;
And now on the Onclick of BACK Button Use indexvalue to retrieve...
String data = arraylist.get(indexvalue);
indexvalue--;
here Decremented the indexvalue to retrieve the previous string..
hope you'll understand what im trying to say little bit of lengthy explanation ...

Programming in Android Studio to able the user to give three numbers and save them

in android stuido I would like to code an activity, where the user can input numbers. For, example he types the number to the textfield, click 'OK' button, then the textfield gets clear, he types the second number, than the third, and after they give the third number the program goes to another activity and sayst thanks for the free number. I would like to save the three numbers for further use and have them in an ascending order. How should I do it?
I agree with Andrii, this is a very vague and general question. To get you pointed in the right direction though, you would want a layout with an number based-editText widget (for the user input). I would then add the button, and then implement OnClickListener for the button so that everytime the button is pressed, it calls a method you will define that will store the value in an array or list (which can be sorted), along with some kind of tracker to keep track of how many numbers have been entered - then clearing the editText field so that another number can be input; on the third number, the method calls the activity via intent or some other way saying "thanks for the free number".
This is all general and it is going to take quite a bit of work and API Guide/DeveloperDocs searching on the Android web site.

Trouble creating a "speed dial" button on Android

I'm making a very simple launcher for Android. I'm having trouble getting some speed dial buttons to work.
The idea is that when the user presses the speed dial buttons for the first time, they'll be prompted to enter a phone number with a popup window (dialog? I think?). That number will then be assigned to that button, which will then call the assigned number when the button is next pressed. It's not great if they want to reassign a number, but this is just something rough that i'd like to get out of the way. I'm thinking of creating an int to reflect the state of the button (0 = no number assigned, 1 = number is assigned), and using if statements to either bring up the window or call the number.
I don't know how to bring up such a window (although I do know I can bring up a dial pad using (android:inputType="phone")), as well as how to pass the number that the user inputted to an int/long. I'm thinking I can assign the value to an int, although that might not be the most optimal data type. I have a rough idea on how to dial a number once it's given.
What should I do? I'm quite new to programming, so i'm having trouble with this.
may be this could help.
have a long click listener to the buttons.
on long click event, show a dialog widow which accepts the number.
store it in a persistent memory, either db, files or pref utils by android.
in on click button, have a logic to retrieve the stored content and update the views accordingly.

Android App , add a favorite quote functionality

I have an android app which displays quotes and have navigation to go to next quote and so on. would like to add "Save Quote As favourite" based on users selection of particular quote.
Once user saves Fav quotes and wants to see those quotes only, app should show those quotes.
Currently app reads the quotes from XML file. Let me know if any more information is required to understand the problem.
I would provide every quote with an ID (int). Whenever the user selects a quote to be a favourite, that ID is saved to a Set of integers. Later on if user decides to show favourites, you fetch all quotes with your IDs from the Set and show them in a appropriate view, for example a ListView
If you have a Quote class or something like that, you might as well put them in a collection whenever user decide his favourites, and show them in a ListView with a custom adapter.

How can Dynamic Add and Remove View In android ? And this is also Store even if I closed the Application

In my Application I want to Add and Remove View (like Button, or Textview, Checkbox ) by Coding (Programming ).
In Details:
I have One EditText and One Add Button. User Enter Anything in EditText and Press the Add Button then this one is added in bellow LinearLayout, and whether User click on his/her added Button it will going to next LinearLayout.
I get sucess upto this.
but when user click the button in second LinearLayout then it will come back on first Linearlayout. I am getting error Here, i don't know where I made a Mistake.
And I also facing Problem about how can I Store this all. Like User Add 5 Button and closed the application and whenever he/she came back to application I need whatever he/she previously added.
Here is what i done.
http://dynamicandroidview.blogspot.com/2011/12/how-to-add-view-in-android-by-coding.html
Try to create a database table with minimum 2 columns in your case it will be id and buttonText.
Now when user clicks on the add button it will save text to the database and will create the button dynamically below any buttons which are already created before or as a new button.
Now in your onCreate method get the count of text thats stored in database.Some thing like the following code:
DB getData = DB.getInstance();
getData.open(this);
ArrayList<TextHolder> getList = new ArrayList<TextHolder>();
getList = getData.getAllTextFromGeT();
getData.close();
x = genList.size();
Here x will be the number/count of elements that are already stored in the database.Now you can another int say i and using this i and x in the for loop you can create buttons dynamically.
Inside the loop you can do something like the following to get text for all the buttons that are being created:
TextHolder firstOne = getList.get(i);
String text = firstOne.getText();
You will also need class with getters and setters method in order to convert DB elements into objects.Like in the above code getText() is our getter method which is getting elements from database and returning it here.
here text will be the text of the button.
So every-time users starts the application he will see all the buttons that he created when he ran the application before and newly added button will appear on the spot and also will be stored in the database for future retrieval.
Remember we are just storing text of the button and assigning it unique id which helps us to create the buttons.Hope this helps

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