Android and PImage array

Android Processing

germond79

in Android Processing • 4 months ago

hello,

i try to write an app. the aim is to play animation as long as the user drag its finger into the screen.

i'm trying to load an array of 144 images long. Each ones has these properties : png, 800 x 450.

i tested different lengths of the array. it works until 18 images.

import android.view.MotionEvent;
PImage[] mesImages;
int positionLecture;
void setup()
{
orientation(LANDSCAPE);
mesImages = new PImage [17];
for (int i=0; i < mesImages.length; i++) {
mesImages[i]=loadImage("/storage/extSdCard/processing/Neige-Laura-"+nf(i, 3)+".png");
}
positionLecture =0;
}
void draw()
{
image(mesImages[positionLecture], 0, 0);
}
void mouseDragged()
{
positionLecture++;
if (positionLecture==mesImages.length) {
positionLecture=0;
}
}
void mousePressed()
{
}
public boolean surfaceTouchEvent(MotionEvent event) {
//call to keep mouseX, mouseY, etc updated
super.surfaceTouchEvent(event);
//forward event to class for processing
return gesture.surfaceTouchEvent(event);
}

when mesImages.length > 18, here's the error message i get :

FATAL EXCEPTION: Animation Thread

java.lang.OutOfMemoryError

at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)

at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:650)

at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:722)

at processing.core.PApplet.loadImage(Unknown Source)

at processing.test.laura_video_01_android.laura_video_01_android.setup(laura_video_01_android.java:55)

at processing.core.PApplet.handleDraw(Unknown Source)

at processing.core.PGraphicsAndroid2D.requestDraw(PGraphicsAndroid2D.java:169)

at processing.core.PApplet.run(Unknown Source)

at java.lang.Thread.run(Thread.java:856)

Any idea ?

Replies(1)

germond79

Re: Android and PImage array

4 months ago

Found this piece of code (from here : https://forum.processing.org/topic/examples-of-asynchonous-data-image-loading), that improves the sketch :

/**
DataBuffer taken from http://wiki.processing.org/w/Asynchronous_data/image_loading
@author toxi
*/
import java.io.*;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import javax.imageio.*;
import java.awt.image.BufferedImage;
import processing.core.PConstants;
import processing.core.PImage;
public class DataBuffer {
private byte[] bytes;
public DataBuffer(byte[] buf) {
bytes=buf;
}
public byte[] getRaw() {
return bytes;
}
public String getAsText() {
return getAsText("UTF-8");
}
public String getAsText(String encoding) {
try {
return new String(bytes, encoding);
}
catch(Exception e) {
e.printStackTrace();
}
return null;
}
// updated according to:
// http://forum.processing.org/topic/converting-bufferedimage-to-pimage#25080000000340208
public PImage getAsImage() {
try {
ByteArrayInputStream bis=new ByteArrayInputStream(bytes);
Bitmap bimg = BitmapFactory.decodeStream(bis);
PImage img=new PImage(bimg.getWidth(), bimg.getHeight(), PConstants.ARGB);
bimg.getPixels(img.pixels, 0, img.width, 0, 0, img.width, img.height);
img.updatePixels();
return img;
}
catch(Exception e) {
System.err.println("Can't create image from buffer");
e.printStackTrace();
}
return null;
}
}

but

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Android and PImage array

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Re: Android and PImage array

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