Pass Bitmap between activities

Bitmap can be passed between activities as extra in form of Parcelable. But it's not recommended for large bitmap. Save and Read Bitmap in Internal Storage and Share Bitmap between activities as global common resources are alternative.

First Activity (Modified from last exercise "Image processing on Bitmap"):

package com.exercise.AndroidBitmap;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

public class AndroidBitmapActivity extends Activity {

ImageView image1, image2, image3, image4;
Button buttonSwitch;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    image1 = (ImageView)findViewById(R.id.image1);
    image2 = (ImageView)findViewById(R.id.image2);
    image3 = (ImageView)findViewById(R.id.image3);
    image4 = (ImageView)findViewById(R.id.image4);
    buttonSwitch = (Button)findViewById(R.id.switchactivity);

    Bitmap bmOriginal = BitmapFactory.decodeResource(getResources(), R.drawable.icon);
    image1.setImageBitmap(bmOriginal);

    int width = bmOriginal.getWidth();
    int height = bmOriginal.getHeight();

    final Bitmap bmDulicated2 = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    final Bitmap bmDulicated3 = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    final Bitmap bmDulicated4 = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    int[] srcPixels = new int[width * height];
    bmOriginal.getPixels(srcPixels, 0, width, 0, 0, width, height);
    int[] destPixels = new int[width * height];

    swapGB(srcPixels, destPixels);
    bmDulicated2.setPixels(destPixels, 0, width, 0, 0, width, height);
    image2.setImageBitmap(bmDulicated2);

    swapRB(srcPixels, destPixels);
    bmDulicated3.setPixels(destPixels, 0, width, 0, 0, width, height);
    image3.setImageBitmap(bmDulicated3);

    swapRG(srcPixels, destPixels);
    bmDulicated4.setPixels(destPixels, 0, width, 0, 0, width, height);
    image4.setImageBitmap(bmDulicated4);

    buttonSwitch.setOnClickListener(new Button.OnClickListener(){

@Override
public void onClick(View arg0) {
 // TODO Auto-generated method stub
 Intent intent = new Intent(AndroidBitmapActivity.this, SecondActivity.class);

 Bundle bundle = new Bundle();
 bundle.putParcelable("BITMAP_A", bmDulicated2);
 bundle.putParcelable("BITMAP_B", bmDulicated3);
 bundle.putParcelable("BITMAP_C", bmDulicated4);
 intent.putExtras(bundle);
 startActivity(intent);
}});

}

void swapGB(int[] src, int[] dest){
 for(int i = 0; i < src.length; i++){
  dest[i] = (src[i] & 0xffff0000)
   | ((src[i] & 0x000000ff)<<8)
   | ((src[i] & 0x0000ff00)>>8);
 }
}

void swapRB(int[] src, int[] dest){
 for(int i = 0; i < src.length; i++){
  dest[i] = (src[i] & 0xff00ff00)
   | ((src[i] & 0x000000ff)<<16)
   | ((src[i] & 0x00ff0000)>>16);
 }
}

void swapRG(int[] src, int[] dest){
 for(int i = 0; i < src.length; i++){
  dest[i] = (src[i] & 0xff0000ff)
   | ((src[i] & 0x0000ff00)<<8)
   | ((src[i] & 0x00ff0000)>>8);
 }
}
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<ImageView
android:id="@+id/image1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<ImageView
android:id="@+id/image2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<ImageView
android:id="@+id/image3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<ImageView
android:id="@+id/image4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<Button
android:id="@+id/switchactivity"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Switch to second activity"
/>
</LinearLayout>

SecondActivity.java

package com.exercise.AndroidBitmap;

import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.widget.ImageView;

public class SecondActivity extends Activity {

ImageView imageA, imageB, imageC;

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.second);
    imageA = (ImageView)findViewById(R.id.imagea);
    imageB = (ImageView)findViewById(R.id.imageb);
    imageC = (ImageView)findViewById(R.id.imagec);

    Bundle bundle = this.getIntent().getExtras();
    Bitmap bmA = bundle.getParcelable("BITMAP_A");
    Bitmap bmB = bundle.getParcelable("BITMAP_B");
    Bitmap bmC = bundle.getParcelable("BITMAP_C");

    imageA.setImageBitmap(bmA);
    imageB.setImageBitmap(bmB);
    imageC.setImageBitmap(bmC);

}

}

second.xml, layout of SecondActivity.java

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Second Activity"
/>
<ImageView
android:id="@+id/imagea"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<ImageView
android:id="@+id/imageb"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<ImageView
android:id="@+id/imagec"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>

Also, AndroidManifest.xml have to be modified to add Activity SecondActivity.

Download the files.