Create an application to pick up any image from the native application gallery and display it
on the screen.


MainActivity.java

package com.example.assignment23;

import androidx.annotation.NonNull;

import androidx.annotation.Nullable;

import androidx.appcompat.app.AppCompatActivity;

import android.Manifest;

import android.content.Intent;

import android.content.pm.PackageManager;

import android.os.Build;

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 mImageView;

    Button mChooseBtn;

    private static final int IMAGE_PICK_CODE = 1000;

    private static final int PERMISSION_CODE = 1001;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        mImageView = findViewById(R.id.image_view);

        mChooseBtn = findViewById(R.id.choose_image_btn);

        mChooseBtn.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

                    if (checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE)

                            == PackageManager.PERMISSION_DENIED) {

                        String[] permissions = {Manifest.permission.READ_EXTERNAL_STORAGE};

                        requestPermissions(permissions, PERMISSION_CODE);

                    } else {

                        pickImageFromGallery();

                    }

                } else {

                    pickImageFromGallery();

                }

            }

        });

    }

    private void pickImageFromGallery() {

        Intent intent = new Intent(Intent.ACTION_PICK);

        intent.setType("image/*");

        startActivityForResult(intent, IMAGE_PICK_CODE);

    }

    @Override

    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {

        switch (requestCode){

            case PERMISSION_CODE:{

                if (grantResults.length > 0 && grantResults[0] ==

                PackageManager.PERMISSION_GRANTED){

                }

                else{

                    Toast.makeText(this, "Permission Denied....!", Toast.LENGTH_SHORT).show();

                }

            }

        }

    }

    @Override

    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {

        if (resultCode == RESULT_OK && requestCode == IMAGE_PICK_CODE){

            mImageView.setImageURI(data.getData());

        }

    }

}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<AbsoluteLayout 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:layout_gravity="center_horizontal"

    tools:context=".MainActivity">

    <ImageView

        android:id="@+id/image_view"

        android:layout_width="match_parent"

        android:layout_height="467dp"

        android:layout_x="0dp"

        android:layout_y="0dp"

        android:scaleType="centerCrop"

        android:src="@drawable/ic_image_black_24dp" />

    <Button

        android:id="@+id/choose_image_btn"

        style="@style/Base.Widget.AppCompat.Button.Colored"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_x="2dp"

        android:layout_y="488dp"

        android:text="Choose Image" />

</AbsoluteLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.assignment23">

    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE">

    </uses-permission>

    <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">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>




Output

After picking up the image

To download follow this link : Program 23