How to convert Drawable to a Bitmap in Android?

AndroidApps/ApplicationsMobile Development

This example demonstrates how do I convert Drawable to a Bitmap 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.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:orientation="vertical"
   android:padding="4dp"
   android:gravity="center"
   tools:context=".MainActivity">
   <ImageView
   android:id="@+id/imageView"
   android:layout_width="match_parent"
   android:layout_height="wrap_content" />
   <Button
   android:id="@+id/btnConvert"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:text="Convert Drawable to Bitmap"/>
</LinearLayout>

Step 3 − Add the following code to src/MainActivity.java

import androidx.appcompat.app.AppCompatActivity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
   ImageView imageView;
   Button btnConvert;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      imageView = findViewById(R.id.imageView);
      btnConvert = findViewById(R.id.btnConvert);
      btnConvert.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.image);
            imageView.setImageBitmap(bitmap);
            Toast.makeText(getApplicationContext(), "Image converted to Bitmap",
            Toast.LENGTH_SHORT).show();
         }
      });
   }
}

Step 4 − Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="app.com.sample">
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity" android:windowSoftInputMode="adjustPan">
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activity>
   </application>
</manifest>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from the android studio, open one of your project's activity files and click Run Play Icon icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen

raja
Published on 29-Oct-2019 15:02:32
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