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Android Articles
Page 37 of 125
What is Context on Android?
Definitionit's the context of current state of the application/object. It lets newly-created objects understand what has been going on. Typically, you call it to get information regarding another part of your program (activity and package/application). In the below program you will see that we have created a textView dynamically and passed context. This context is used to get the information about the environment.This example demonstrates how do I display context in an android textView.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add ...
Read MoreHow to make an android spinner with initial default text?
This example demonstrates how do I make an android spinner with initial default text in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.javaimport android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Spinner; import android.widget.Toast; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity { Spinner spinner; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); ...
Read MoreHow to parse JSON on Android?
This example demonstrates how to parse JSON in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.TextView; import org.json.JSONException; import org.json.JSONObject; public class MainActivity extends AppCompatActivity { String JSON_STRING="{"employee":{"name":"adolf hitler", "salary":65000}}"; String name, salary; TextView employeeName, employeeSalary; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); ...
Read MoreHow to make an ImageView with rounded corners on Android App?
This example demonstrates how to make an ImageView with rounded corners on Android App.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.javapackage com.example.sample; import android.graphics.Bitmap; import android.graphics.BitmapShader; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.RectF; import android.graphics.Shader; import android.graphics.drawable.BitmapDrawable; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.widget.ImageView; import android.widget.TextView; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) ...
Read MoreHow to parse JSON Objects on Android?
This example demonstrates how to parse JSON Objects on Android .Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following dependency to Gradle Scripts ⇒ build.gradle and do syncapply plugin: 'com.android.application' android { compileSdkVersion 28 defaultConfig { applicationId "com.example.sample" minSdkVersion 21 targetSdkVersion 28 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes { release { ...
Read MoreHow to get the difference between two dates in Android?
This example demonstrates how do I get the difference between two dates in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.javaimport android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.TextView; import android.widget.Toast; import java.text.SimpleDateFormat; import java.util.Date; public class MainActivity extends AppCompatActivity{ TextView textView; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView = findViewById(R.id.textView); ...
Read MoreHow to set OnclickListener on a radio button in android?
This example demonstrates how do I set OnclickListener on a radio button in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.javaimport android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Toast; public class MainActivity extends AppCompatActivity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } ...
Read MoreHow to convert ISO 8601 string to Date/time object in Android?
This example demonstrates how do I convert ISO 8601 string to date/time object in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.javaimport android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.TextView; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; public class MainActivity extends AppCompatActivity { TextView textView; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView = findViewById(R.id.textView); ...
Read MoreAndroid How to draw a smooth line following my finger?
This example demonstrates how do I draw a smooth line following my finger in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.javaimport android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.Display; import android.view.MotionEvent; import android.view.View; import android.widget.ImageView; public class MainActivity extends AppCompatActivity implements View.OnTouchListener { ImageView imageView; Bitmap bitmap; Canvas canvas; Paint paint; float downX = ...
Read MoreHow to control the height and width of the default alert dialog in android?
This example demonstrates how do I control the height and width of the default alert dialog in android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.javaimport android.app.Activity; import android.app.AlertDialog; import android.content.Context; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.view.WindowManager; import android.widget.Button; import android.widget.RelativeLayout; public class MainActivity extends AppCompatActivity{ Button button; RelativeLayout relativeLayout; Context ...
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