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Found 2041 Articles for Mobile Development
![Azhar](https://www.tutorialspoint.com/assets/profiles/124637/profile/60_166181-1565938637.jpg)
604 Views
This example demonstrates how do I apply theme to an activity 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; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } }Step 4 − Add the following code to androidManifest.xml ... Read More
![Azhar](https://www.tutorialspoint.com/assets/profiles/124637/profile/60_166181-1565938637.jpg)
3K+ Views
This example demonstrates how do I download image from url 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.ProgressDialog; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.AsyncTask; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.ImageView; import java.io.InputStream; public class MainActivity extends AppCompatActivity { String url = "https://images.pexels.com/photos/1226302/pexels-photo1226302.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500"; ImageView image; Button button; ProgressDialog mProgressDialog; ... Read More
![Azhar](https://www.tutorialspoint.com/assets/profiles/124637/profile/60_166181-1565938637.jpg)
2K+ Views
This example demonstrates how do I handle back button in an android activity.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.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; public class MainActivity extends AppCompatActivity { Button button; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); button = findViewById(R.id.button); ... Read More
![Azhar](https://www.tutorialspoint.com/assets/profiles/124637/profile/60_166181-1565938637.jpg)
5K+ Views
This example demonstrates how Activity.finish() work 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.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button button = (Button) findViewById(R.id.button); button.setOnClickListener(new View.OnClickListener() { ... Read More
![Azhar](https://www.tutorialspoint.com/assets/profiles/124637/profile/60_166181-1565938637.jpg)
732 Views
This example demonstrates how do I prevent an Android device from going to sleep mode.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.WindowManager; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); } }Step 4 − Add the following code ... Read More
![Azhar](https://www.tutorialspoint.com/assets/profiles/124637/profile/60_166181-1565938637.jpg)
2K+ Views
This example demonstrates the difference between onCreate() and onStart() in Android.Note −onCreate() is called when the when the activity is first created.onStart() is called when the activity is becoming visible to the user.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.util.Log; public class MainActivity extends AppCompatActivity { public static final String TAG = "Have a nice day!"; ... Read More
![Azhar](https://www.tutorialspoint.com/assets/profiles/124637/profile/60_166181-1565938637.jpg)
186 Views
This example demonstrates about How do I convert Pixels to DP’s 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.Context; import android.content.res.Resources; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.RelativeLayout; import android.widget.TextView; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ... Read More
![Azhar](https://www.tutorialspoint.com/assets/profiles/124637/profile/60_166181-1565938637.jpg)
4K+ Views
This example demonstrates about How to limit Decimal Places in Android EditText.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 app.com.sample; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.text.InputFilter; import android.text.Spanned; import android.widget.EditText; import java.util.regex.Matcher; import java.util.regex.Pattern; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); EditText etText = ... Read More
![Azhar](https://www.tutorialspoint.com/assets/profiles/124637/profile/60_166181-1565938637.jpg)
947 Views
This example demonstrates about How to detect airplane mode is on or off in AndroidStep 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 app.com.sample; import androidx.appcompat.app.AppCompatActivity; import android.content.Context; import android.os.Bundle; import android.provider.Settings; import android.widget.TextView; public class MainActivity extends AppCompatActivity { TextView textView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView ... Read More
![Azhar](https://www.tutorialspoint.com/assets/profiles/124637/profile/60_166181-1565938637.jpg)
1K+ Views
This example demonstrates about How to play a custom ringtone/alarm sound in AndroidStep 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 app.com.sample; import androidx.appcompat.app.AppCompatActivity; import android.media.Ringtone; import android.media.RingtoneManager; import android.net.Uri; import android.os.Bundle; import android.view.View; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void playRingtone(View view) ... Read More