How to Share Image on Button Click in Android Studio | Image Sharing Tool Beginner Tutorials

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Share Image on button click - Android Studio

activity_main.xml

<LinearLayout 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:orientation="vertical"
    android:padding="10dp"
    tools:context=".MainActivity" >

    <ImageView
        android:id="@+id/imageView"
        android:textAlignment="center"
        android:src="@mipmap/ic_launcher_round"
        android:layout_gravity="center"
        android:layout_width="300dp"
        android:layout_height="300dp" />

    <Button
        android:id="@+id/btnShare"
        android:text="Share Image"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

MainActivity.java

package com.usmtip.myapplication;



import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;


import androidx.appcompat.app.AppCompatActivity;

import java.io.File;
import java.io.FileOutputStream;


public class MainActivity extends AppCompatActivity {




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






        //get image as bitmap from ImageView
        ImageView post_image = (ImageView)findViewById(R.id.imageView);
        Drawable myDrawable = post_image.getDrawable();
        final Bitmap bitmap      = ((BitmapDrawable) myDrawable).getBitmap();

        Button mBtnShare = findViewById(R.id.btnShare);
        mBtnShare.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                //share image
                try {
                    File file = new File(getExternalCacheDir(),"usmtipandroid.png");
                    FileOutputStream fOut = new FileOutputStream(file);
                    bitmap.compress(Bitmap.CompressFormat.PNG, 100, fOut);
                    fOut.flush();
                    fOut.close();
                    file.setReadable(true, false);
                    final Intent intent = new Intent(android.content.Intent.ACTION_SEND);
                    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file));
                    intent.setType("image/png");
                    startActivity(Intent.createChooser(intent, "Share image via"));
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

        });

    }

}