Question

我正在使用itext库来创建图像和文本的pdf。以下代码适用于4个设备中的3个，但在第4个设备上，我得到了OutOfMemoryException。代码在AsyncTask doinbackground方法中运行，它使用bimtmap对象检查每个jpg文件（来自sdcard的文件目录）的旋转，根据高度测量宽度，并在必要时旋转itext Image对象90degrees。 / p>

        try {

            Document document = new Document();
            PdfWriter.getInstance(document, new FileOutputStream(
                    Environment.getExternalStorageDirectory()
                            + "/doc" + documentID + ".pdf"));
            document.open();
            document.setMargins(0f, 0f, 0f, 0f);
            document.add(new Paragraph(documentNameEt.getText().toString()));
            document.add(new Paragraph(makeUserDeets()));
            Bitmap b = null;
            Image image = null;
            Rectangle r = document.getPageSize();
            for (String d : paths[0]) {
                Log.d("senddataobj", d);
                image = Image.getInstance(d);
                b = BitmapFactory.decodeFile(d);
                if (b.getWidth() > b.getHeight()) {
                    image.setRotationDegrees(90);
                    Log.d(d, "rotating");
                }
                b.recycle();
                image.scaleToFit(r.getWidth(), r.getHeight());
                document.add(image);                
            }

            document.close();
        } catch (Exception ex) {
            ex.printStackTrace();
        }

java.lang.RuntimeException：执行时发生错误 doInBackground（）在android.os.AsyncTask $ 3.done（AsyncTask.java:278）at at java.util.concurrent.FutureTask中$ Sync.innerSetException（FutureTask.java:273） at java.util.concurrent.FutureTask.setException（FutureTask.java:124） at java.util.concurrent.FutureTask $ Sync.innerRun（FutureTask.java:307）在java.util.concurrent.FutureTask.run（FutureTask.java:137）at android.os.AsyncTask $ SerialExecutor $ 1.run（AsyncTask.java:208）at at java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1076）在 java.util.concurrent.ThreadPoolExecutor中的$ Worker.run（ThreadPoolExecutor.java:569）在java.lang.Thread.run（Thread.java:856）引起： java.lang.OutOfMemoryError at android.graphics.BitmapFactory.nativeDecodeStream（Native Method）at android.graphics.BitmapFactory.decodeStream（BitmapFactory.java:493）at at android.graphics.BitmapFactory.decodeFile（BitmapFactory.java:299）at at android.graphics.BitmapFactory.decodeFile（BitmapFactory.java:324）at com.wake.snapshot.CreateDocumentActivity $ CreateAndSendPdf.doInBackground（CreateDocumentActivity.java:315）在 com.wake.up.your.wealth.snapshot.CreateDocumentActivity $ CreateAndSendPdf.doInBackground（CreateDocumentActivity.java:1）在android.os.AsyncTask $ 2.call（AsyncTask.java:264）at java.util.concurrent.FutureTask $ Sync.innerRun（FutureTask.java:305）... 另外5个

Answer 1

由于你只需要一个大小的位图使用BitmapFactory和inJustDecodeBounds选项http://developer.android.com/reference/android/graphics/BitmapFactory.Options.html#inJustDecodeBounds ...它将返回null Bitmap，但你的大小将在outHeight和outWidth中

Android itext pdf库OutOfMemoryError

1 个答案: