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JSON Example

csdevbin
JSON :- JavaScript Object Notation It contains key/value pairs Key-> Strings Values:->JSON {}   :-> JSON Object []    :-> JSON array Syntax : { "employees" :[     { "firstName" : "John" ,  "lastName" : "Doe" },     { "firstName" : "Anna" ,  "lastName" : "Smith" },     { "firstName" : "Peter" ,  "lastName" : "Jones" } ]} package csdevbin.json; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.TextView; import org.json.JSONObject; public class MainActivity extends AppCompatActivity {     public static final String JSON_STRING = "{ \" employee \" :{ \" name \" : \" John \" , \" salary \" :6000}}" ;     @Override     public void onCreate(Bundle savedInstanceState) {         super .onCreat

Grid View

csdevbin
GridView  is a  ViewGroup  that displays items in a two-dimensional, scrollable grid. The grid items are automatically inserted to the layout using a  ListAdapter . Project Structure: 1 .MainActivity.java 2 .ImageAdapter.java 3 .main_activity.xml 4 . Save the image files into the project's  res/drawable/  directory.  ( Download ) main_activity.xml <? xml version= "1.0" encoding= "utf-8" ?> < RelativeLayout xmlns: android = "http://schemas.android.com/apk/res/android"     xmlns: tools = "http://schemas.android.com/tools"     android :id= "@+id/activity_main"     android :layout_width= "match_parent"     android :layout_height= "match_parent"     android :paddingBottom= "@dimen/activity_vertical_margin"     android :paddingLeft= "@dimen/activity_horizontal_margin"     android :paddingRight= "@dimen/activity_horizontal_margin"     android :paddingTop= &

SharedPreferences 2

csdevbin
MainActivity.java package com.blogspot.csdevbin.sharedpreferences; import android.content.Context; import android.content.SharedPreferences; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends AppCompatActivity {     EditText food , shopping , fuel , telephone ;     TextView previousExpense ;     SharedPreferences sharedPreferences ;     @Override     protected void onCreate(Bundle savedInstanceState) {         super .onCreate(savedInstanceState);         setContentView(R.layout. activity_main );          food = (EditText)findViewById(R.id. etfood );          shopping = (EditText)findViewById(R.id. edShopping );          fuel = (EditText)findViewById(R.id. edFuel );          telephone = (EditTex

Button Example 2

csdevbin
MainActivity.java package com.blogspot.csdevbin.mynewpractice; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.Toast; public class MainActivity extends AppCompatActivity {     @Override     protected void onCreate(Bundle savedInstanceState) {         super .onCreate(savedInstanceState);         setContentView(R.layout. activity_main );         B1();     }     private void B1() {         Button b1 = (Button) findViewById(R.id. button1 );         b1.setOnClickListener( new View.OnClickListener() {             @Override             public void onClick(View v) {                 Toast. makeText (getApplication(), "Button 1 clicked" ,Toast. LENGTH_LONG ).show();              }         });     } }  activity_main.xml <? xml version= "1.0" enc