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Downloading Image From Internet in Android

1 min read

activity_main.xml

<?xml version=“1.0” encoding=“utf-8”?>
<LinearLayout 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”
   
android:orientation=“vertical”
   
tools:context=“com.arham.csdevbin.downloadimagefrominternet.MainActivity”>

    <ImageView
       
android:id=“@+id/imageView”
       
android:layout_width=“300dp”
       
android:layout_height=“400dp”
       
android:layout_gravity=“center_horizontal”
       
android:layout_marginTop=“30dp”
       
app:layout_constraintLeft_toLeftOf=“parent”
       
app:layout_constraintRight_toRightOf=“parent”
       
app:srcCompat=“@mipmap/ic_launcher”
       
tools:layout_editor_absoluteY=“45dp” />

    <Button
       
android:id=“@+id/button”
       
android:layout_width=“wrap_content”
       
android:layout_height=“wrap_content”
       
android:layout_gravity=“center_horizontal”
       
android:layout_marginTop=“20dp”
       
android:text=“Download Image”
       
app:layout_constraintLeft_toLeftOf=“parent”
       
app:layout_constraintRight_toRightOf=“parent”
       
tools:layout_editor_absoluteY=“152dp” />
</
LinearLayout>

MainActivity.java
package com.arham.csdevbin.downloadimagefrominternet;

import android.app.ProgressDialog;
import android.content.Context;
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;
import java.net.URL;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    ImageView
imageView;
    Button
btnD;

   
@Override
   
protected void onCreate(Bundle savedInstanceState) {
       
super.onCreate(savedInstanceState);
        setContentView(R.layout.
activity_main);

       
imageView = findViewById(R.id.imageView);
       
btnD = findViewById(R.id.button);
       
btnD.setOnClickListener(MainActivity.this);
    }
   
@Override
   
public void onClick(View v) {
        DownloadImageTask downloadImageTask =
new DownloadImageTask(MainActivity.this);
        downloadImageTask.execute(
"http://www.gettyimages.ca/gi-resources" +
               
"/images/Homepage/Hero/UK/CMS_Creative_164657191_Kingfisher.jpg");
    }

   
private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {

        ProgressDialog
progressDialog;
        Context
context;

       
public DownloadImageTask(Context context) {
           
this.context = context;
           
progressDialog = new ProgressDialog(context);
        }
        
@Override
       
protected void onPreExecute() {
           
super.onPreExecute();
           
progressDialog.setMessage("Downloading Image... Please Wait");
           
progressDialog.show();
        }
       
@Override
       
protected Bitmap doInBackground(String... params) {
            String stringUrl = params[
0];
            Bitmap bitmap = null;

           
try {
                URL url =
new URL(stringUrl);
                InputStream inputStream = url.openStream();
                bitmap = BitmapFactory.decodeStream(inputStream);

            }
catch (Exception e) {
                e.printStackTrace();
            }
           
return bitmap;
        }
       
@Override
       
protected void onPostExecute(Bitmap bitmap) {
            
super.onPostExecute(bitmap);

           
imageView.setImageBitmap(bitmap);
           
if (progressDialog.isShowing()) {
               
progressDialog.dismiss();
            }
        }
    }
}

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