Add a Dynamic ListView, Step-By-Step

How to Add a Dynamic ListView to your Android Project, Step-By-Step

After each step you should be able to compile and test, with no errors.

A "Dynamic ListView" is a ListView where items can be added.
A "Static ListView" is a ListView where the items in the ListView will not be changed.

1. Create a List with an ArrayList.

2. Link your ArrayAdapter to the ListView named myListView.

3. Compile and run!

Next Recommended Article: Do Action on ListView Item Click

How to Link List to ArrayAdapter

1. Create a list called myList.

2. Create an ArrayAdapter.

3. In MainActivity.java, add the line below to the onCreate method. This is linked to a list named myList.

myArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, myList);

4. Compile and test!

Resource:

Refresh/Update a ListView after adding or deleting Item to List

How to Update a ListView after adding or deleting an Item to a List, Step-By-Step

1. If you don't already have an Android project, create a new project.

2. Add a Dynamic ListView to your Android project.

3. Open your MainActivity.java file and add the below line below.

myListView.invalidateViews();

4. Compile and run!

Solution for: error: local variable myList is accessed from within inner class; needs to be declared final

Problem:

    [javac] Compiling 3 source files to C:\XXX\Workspace\MyApp\bin\classes
    [javac] C:\XXX\Workspace\MyApp\src\com\akp\MyAPp\MainActivity.java:74: error: local variable myList is accessed from within inner class; needs to be declared final
    [javac] myList.add(strEditText);

    [javac] ^

    [javac] 1 error

Solution: 

1. Make sure you are linking your List to ArrayList correctly. 

How to Link ArrayList to a List

An ArrayList is dynamic.

1. If you don't already have an Android project created, create an Android project.

2. In MainActivity.java, add the below line of code to the imports section.

     import java.util.ArrayList;

3. Create a List with an ArrayList called myList.

4. Initialize myList with ArrayList by adding the below code in the onCreate method.

myList = newArrayList<ArrayList<String>();

5. Compile and run!

Resources:

How to Create an ArrayList

ArrayList was added in API Level 1

1. Open the MainActivity.java file and add the below line to the imports section.

import java.util.List;
import java.util.ArrayList;

2. In the onCreate method, add the following line to create String List Array. This will declare a List variable called myList.

    List<String> myList;

3. Add the bold line below to the onCreate method.

myList = new ArrayList<String>();

4. Compile and run!

Resources:

http://developer.android.com/reference/java/util/ArrayList.html
http://java67.blogspot.com/2012/12/how-to-create-and-initialize-list-arraylist-same-line.html
http://stackoverflow.com/questions/16432956/how-to-search-files-based-on-type