How to Set Image in a Image View on Click in Android Studio

Amir Ali
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Article

Introduction

In this article, you will learn how to set an image in an Image View on a click.

Step 1

First I used many Image Views and ScrollViews for the sliding activity. The first Image View sets the image on a button click and the others contain the images to be set. I saved the images in the drawable folder by copy and paste.

Step 2

Open the layout file activity_main.xml and write this:

<?xml version="1.0" encoding="utf-8" ?>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:background="#80000000">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imageView1"
android:layout_gravity="center"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Button"
android:id="@+id/button" android:layout_gravity="center"
android:visibility="invisible"/>
<HorizontalScrollView
android:layout_width="200dp"
android:layout_height="wrap_content"
android:id="@+id/scrollView"
android:layout_gravity="center">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:src="@drawable/image2"
android:layout_width="125dp"
android:layout_height="fill_parent"
android:id="@+id/imageView2"
android:padding="15dp"/>
<ImageView
android:src="@drawable/image3"
android:layout_width="125dp"
android:layout_height="125dp"
android:id="@+id/imageView3"
android:layout_gravity="center"
android:padding="15dp"/>
<ImageView
android:src="@drawable/images4"
android:layout_width="125dp"
android:layout_height="125dp"
android:id="@+id/imageView4"
android:layout_gravity="center"
android:padding="15dp"/>
<ImageView
android:src="@drawable/image5"
android:layout_width="125dp"
android:layout_height="125dp"
android:id="@+id/imageView5"
android:layout_gravity="center"
android:padding="15dp"/>
<ImageView
android:src="@drawable/image6"
android:layout_width="125dp"
android:layout_height="125dp"
android:id="@+id/imageView6"
android:layout_gravity="center"
android:padding="15dp"/>
<ImageView
android:src="@drawable/image7"
android:layout_width="125dp"
android:layout_height="125dp"
android:id="@+id/imageView7"
android:layout_gravity="center"
android:padding="15dp"/>
</LinearLayout>
</HorizontalScrollView>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Click on the Image"
android:id="@+id/textView"
android:layout_marginTop="50dp"
android:textColor="#45454545"
android:layout_marginLeft="120dp"/>
</LinearLayout>

Open the Java class file Main_Activity.java and write this:

package com.wallpaer;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import java.io.IOException;
import java.io.InputStream;
public class MainActivity extends Activity implements View.OnClickListener{
ImageView imageView1;
Button button;
int tophone;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageView1=(ImageView)findViewById(R.id.imageView1);
tophone=R.drawable.ic_launcher;
ImageView imageView2=(ImageView)findViewById(R.id.imageView2);
ImageView imageView3=(ImageView)findViewById(R.id.imageView3);
ImageView imageView4=(ImageView)findViewById(R.id.imageView4);
ImageView imageView5=(ImageView)findViewById(R.id.imageView5);
ImageView imageView6=(ImageView)findViewById(R.id.imageView6);
ImageView imageView7=(ImageView)findViewById(R.id.imageView7);
button=(Button)findViewById(R.id.button);
imageView2.setOnClickListener(this);
imageView3.setOnClickListener(this);
imageView4.setOnClickListener(this);

imageView5.setOnClickListener(this);imageView2.setOnClickListener(this);
imageView6.setOnClickListener(this);
imageView7.setOnClickListener(this);
button.setOnClickListener(this);
}
public void onClick(View v)
{
switch(v.getId())
{
case R.id.imageView2:
imageView1.setImageResource(R.drawable.image2);
tophone=R.drawable.image3;
break;
case R.id.imageView3:
imageView1.setImageResource(R.drawable.image3);
tophone=R.drawable.image5;
break;
case R.id.imageView4:
imageView1.setImageResource(R.drawable.images4);
tophone=R.drawable.ic_launcher;
break;
case R.id.imageView5:
imageView1.setImageResource(R.drawable.image2);
tophone=R.drawable.ic_launcher;
break;
case R.id.imageView6:
imageView1.setImageResource(R.drawable.image6);
tophone=R.drawable.ic_launcher;
break;
case R.id.imageView7:
imageView1.setImageResource(R.drawable.image7);
tophone=R.drawable.ic_launcher;
break;
case R.id.button:
InputStream a=getResources().openRawResource(tophone);
Bitmap whatever= BitmapFactory.decodeStream(a);
try{
getApplicationContext().setWallpaper(whatever);
}
catch(IOException e){
e.printStackTrace();
}
break;
}
}
}