Android ImageView

ImageView is a widget that is used to display images. You can use it to load images from various sources, such as resources, files, or the internet. Here's a simple example of using ImageView in an Android application:

Here is the tutorial for Kotlin

There Are Some Common Attributes for ImageView :

Step 1:
File open res/layout/activity_main.xml file −:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:layout_margin="20dp"
        android:orientation="vertical">


        <ImageView
            android:id="@+id/imageView1"
            android:layout_width="200dp"
            android:layout_height="200dp"
            android:layout_marginTop="10dp"
            android:src="@drawable/profile1" />

        <ImageView
            android:id="@+id/imageView2"
            android:layout_width="200dp"
            android:layout_height="200dp"
            android:layout_marginTop="10dp"
            android:src="@drawable/profile2" />

        <ImageView
            android:id="@+id/imageView3"
            android:layout_width="200dp"
            android:layout_height="200dp"
            android:layout_marginTop="10dp"
            android:src="@drawable/profile2" />

        <Button
            android:id="@+id/submitButton"
            android:layout_width="match_parent"
            android:layout_marginTop="10dp"
            android:layout_height="wrap_content"
            android:text="Submit" />
    </LinearLayout>



</RelativeLayout>

Step 2:

File open com.microappvalley.newtestproject/MainActivity.java file −

Java:

package com.microappvalley.newtestproject;

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.content.ContextCompat;

import android.annotation.SuppressLint;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.Switch;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    ImageView imageView1;
    ImageView imageView2;
    ImageView imageView3;
    Button submitButton;
    @SuppressLint("MissingInflatedId")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



        imageView1=findViewById(R.id.imageView1);
        imageView2=findViewById(R.id.imageView2);
        imageView3=findViewById(R.id.imageView3);

        //set Image From Drawable
        imageView2.setImageResource(R.drawable.profile2);

        //Set Image Form Bitmap
        Drawable drawable = ContextCompat.getDrawable(this, R.drawable.profile3);
        Bitmap bitmap = drawableToBitmap(drawable);
        imageView3.setImageBitmap(bitmap);


    }

    private Bitmap drawableToBitmap(Drawable drawable) {
        if (drawable instanceof BitmapDrawable) {
            return ((BitmapDrawable) drawable).getBitmap();
        }

        // If the drawable is not a BitmapDrawable, create a new Bitmap
        Bitmap bitmap = Bitmap.createBitmap(
                drawable.getIntrinsicWidth(),
                drawable.getIntrinsicHeight(),
                Bitmap.Config.ARGB_8888
        );

        // Create a canvas and draw the drawable on it
        Canvas canvas = new Canvas(bitmap);
        drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
        drawable.draw(canvas);

        return bitmap;
    }
}

Open Device Manager, run the emulator, and then run the application. Next, check the working output and check the output  you declared in your code.