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https://issues.apache.org/jira/browse/CB-14?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13215021#comment-13215021
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Lucas Emanuel Martins Farias commented on CB-14:
------------------------------------------------
This problem occurs when your application is sent to background and the camera
activity is in the foreground. We discovered that our application is being
killed because camera takes too much memory and the garbage colector release
memory killing background apps. This problem occurs with native Android apps
too, so you have to build your own camera app. We resolved this problem
creating our camera app described here:
http://developer.android.com/guide/topics/media/camera.html#custom-camera
So we created a Camera Activity that is called by a plugin and the problem
don´t occured anymore. This way, you app is in foreground preventing the GC to
kill it.
> CameraLauncher Plugin enhancement for loading big image files to avoid
> OutOfMemory exceptions
> ---------------------------------------------------------------------------------------------
>
> Key: CB-14
> URL: https://issues.apache.org/jira/browse/CB-14
> Project: Apache Callback
> Issue Type: Improvement
> Components: Android
> Affects Versions: 1.1.0
> Environment: Android SDK: 2.x & above
> JDK: 1.6
> Eclipse: Helios
> Reporter: Bright Zheng
> Priority: Critical
> Labels: CameraLauncher, OutOfMemory, decodeStream
> Fix For: 2.0.0
>
>
> Currently the CameraLauncher plugin of Phonegap (or Apache Callback) is using
> Android default API for stream decoding.
> It will be very easy to get crash by throwing out the OutOfMemory exceptions
> while loading bigger image files.
> So I add a new method called safeDecodeStream for better stream decoding.
> {code:title=safeDecodeStream method|borderStyle=solid}
> /**
> * A safer decodeStream method
> * rather than the one of {@link BitmapFactory}
> * which will be easy to get OutOfMemory Exception
> * while loading a big image file.
> *
> * @param uri
> * @param width
> * @param height
> * @return
> * @throws FileNotFoundException
> */
> protected Bitmap safeDecodeStream(Uri uri, int width, int height)
> throws FileNotFoundException{
> int scale = 1;
> BitmapFactory.Options options = new BitmapFactory.Options();
> android.content.ContentResolver resolver =
> this.ctx.getContentResolver();
>
> if(width>0 || height>0){
> // Decode image size without loading all data into
> memory
> options.inJustDecodeBounds = true;
> BitmapFactory.decodeStream(
> new
> BufferedInputStream(resolver.openInputStream(uri), 16*1024),
> null,
> options);
>
> int w = options.outWidth;
> int h = options.outHeight;
> while (true) {
> if ((width>0 && w/2 < width)
> || (height>0 && h/2 < height)){
> break;
> }
> w /= 2;
> h /= 2;
> scale *= 2;
> }
> }
> // Decode with inSampleSize option
> options.inJustDecodeBounds = false;
> options.inSampleSize = scale;
> return BitmapFactory.decodeStream(
> new
> BufferedInputStream(resolver.openInputStream(uri), 16*1024),
> null,
> options);
> }
> {code}
> And then change all the codes which are invoking the Android decodeStream API
> directly to this method.
> e.g.
> {code:title=usage example|borderStyle=solid}
> //Updated by Bright for safer decodeStream
> //android.content.ContentResolver resolver = this.ctx.getContentResolver();
> //bitmap =
> android.graphics.BitmapFactory.decodeStream(resolver.openInputStream(uri));
> bitmap = safeDecodeStream(uri, this.targetWidth, this.targetHeight);
> {code}
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