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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to rotate an Image in ImageView by an angle on Android?
This example demonstrates how do I rotate an image in ImageView by an angle 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 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.Button; import android.widget.ImageView; public class MainActivity extends AppCompatActivity { ImageView imageView; Button btnRotate; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ...
Read MoreWhat permission do I need to access Internet from an Android application?
This example demonstrates how do I open google from android app using Internet permission.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.webkit.WebView; public class MainActivity extends AppCompatActivity { WebView webView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); webView = findViewById(R.id.webView); ...
Read MoreHow to use BroadcastReceiver in Android?
This example demonstrates how do I use BroadcastReceiver 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.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.net.wifi.WifiManager; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.CompoundButton; import android.widget.Switch; import android.widget.Toast; public class MainActivity extends AppCompatActivity { Switch wifiSwitch; WifiManager wifiManager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); ...
Read MoreStandalone React.js basic example
Lets first start with writing a simple HTML code and see how we can use ReactBasic React example − Create a simple div like below − Steve My hobby: Cricket Add some styling elements.player{ border:1px solid #eee; width:200px; box-shadow:0 2px 2px #ccc; padding: 22px; display:inline-block; margin:10px; }This is just like normal html data in web app. Now, we may have multiple same players and we then have to replicate the same div like below David My hobby: Cricket These div are same in structure but having different data inside. Here, ...
Read MoreHow to start an android application at boot time?
This example demonstrates how do I start an android application at boot time.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 – Create a new Java class (StartAppOnBoot.java) and add the following code −import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; public class StartAppOnBoot extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { if (Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction())) { Intent i = new Intent(context, ...
Read MoreHow to use ScrollBar in Android?
This example demonstrates how do I use ScrollView 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. ...
Read MoreHow to get a bitmap from Url in Android app?
This example demonstrates how do I get a bitmap from Url in 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 – Copy and paste an image (.png/.jpg/.jpeg) into res/drawableStep 4 − Add the following code to src/MainActivity.javaimport android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.AsyncTask; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.ImageView; import java.io.IOException; import java.io.InputStream; public class MainActivity extends AppCompatActivity { Bitmap ...
Read MoreHow to get the Action bar height in android?
This example demonstrates how do I get the action bar height 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.Button; import android.widget.TextView; import android.support.v7.widget.Toolbar; public class MainActivity extends AppCompatActivity { Toolbar toolbar; Button button; TextView textView; @Override protected void onCreate(Bundle savedInstanceState) { ...
Read MoreHow to pass a variable from Activity to Fragment in Android?
This example demonstrates how do I pass a variable from activity to Fragment 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.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; public class MainActivity extends AppCompatActivity { EditText editText; Button button; @Override protected void onCreate(Bundle savedInstanceState) { ...
Read MoreHow to write files to asset folder in android?
This example demonstrates how do I write files to asset folder 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 – Create a new Assets folder and write a new text file in it.To write a text file, Right click, select New >> file (Quote.txt)Step 4 − Add the following code to src/MainActivity.javaimport android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import java.io.IOException; import java.io.InputStream; public ...
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