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How to load and display an image in ImageView on Android App?
This example demonstrates how to load and display an image in ImageView on Android App.
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:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" tools:context=".MyAndroidAppActivity"> <ImageView android:id="@+id/imageView1" android:layout_width="wrap_content" android:layout_height="wrap_content"/> <Button android:id="@+id/btnChangeImage" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Change Image" /> </LinearLayout>
Step 3 − Add the following code to src/MyAndroidAppActivity.java
package com.example.sample; import android.support.v7.app.AppCompatActivity; import android.app.Activity; import android.os.Bundle; import android.widget.Button; import android.widget.ImageView; import android.view.View; import android.view.View.OnClickListener; public class MyAndroidAppActivity extends AppCompatActivity { Button button; ImageView image; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); addListenerOnButton(); } public void addListenerOnButton() { image=(ImageView) findViewById(R.id.imageView1); button=(Button) findViewById(R.id.btnChangeImage); button.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { image.setImageResource(R.drawable.ic_launcher_background); } }); } }
Step 4 − Add the following code to Manifests/AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.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=".MyAndroidAppActivity"> <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 android studio, open one of your project's activity files and click Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −
Click here to download the project code
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