安卓位图。压缩（Bitmap.CompressFormat.JPEG，100，baos）给我java。lang.OutOfMemoryError

Question

朋友们

我正在使用此函数解码位图

public String BitMapToString(Bitmap bitmap){
            ByteArrayOutputStream baos=new  ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.JPEG,100, baos);
            byte [] b=baos.toByteArray();
            String temp=null;
            try{
            System.gc();
            temp=Base64.encodeToString(b, Base64.DEFAULT);
            }catch(Exception e){
                e.printStackTrace();
            }catch(OutOfMemoryError e){
                baos=new  ByteArrayOutputStream();
                bitmap.compress(Bitmap.CompressFormat.JPEG,50, baos);
                b=baos.toByteArray();
                temp=Base64.encodeToString(b, Base64.DEFAULT);
                Log.e("EWN", "Out of memory error catched");
            }
            return temp;
      }

我从很久以前的一个帖子里得到这个。这在Nexus上运行良好，但在三星上崩溃了 电话。。。我在异步任务中调用它，但它仍然会使我崩溃。。。以下是异常的跟踪：

java.lang.RuntimeException: An error occured while executing doInBackground()
at 安卓.os.AsyncTask$3.done in AsyncTask.java on Line 278
at java.util.concurrent.FutureTask$Sync.innerSetException in FutureTask.java on Line 273
at java.util.concurrent.FutureTask.setException in FutureTask.java on Line 124
at java.util.concurrent.FutureTask$Sync.innerRun in FutureTask.java on Line 307
at java.util.concurrent.FutureTask.run in FutureTask.java on Line 137
at 安卓.os.AsyncTask$SerialExecutor$1.run in AsyncTask.java on Line 208
at java.util.concurrent.ThreadPoolExecutor.runWorker in ThreadPoolExecutor.java on Line 1076
at java.util.concurrent.ThreadPoolExecutor$Worker.run in ThreadPoolExecutor.java on Line 569
at java.lang.Thread.run in Thread.java on Line 856
Caused by: java.lang.OutOfMemoryError
at java.lang.String.<init> in String.java on Line 375
at java.lang.String.<init> in String.java on Line 238
at 安卓.util.Base64.encodeToString in Base64.java on Line 456
at com.xxx.xxxx.activity.XXXActivity$SubmitData.BitMapToString in XXXActivity.java on Line 530
at com.xxx.xxxx.activity.XXXActivity$SubmitData.doInBackground in XXXActivity.java on Line 339
at com.xxx.xxxx.activity.XXXActivity$SubmitData.doInBackground in XXXActivity.java on Line 1
at 安卓.os.AsyncTask$2.call in AsyncTask.java on Line 264
at java.util.concurrent.FutureTask$Sync.innerRun in FutureTask.java on Line 305
... 5 more
java.lang.OutOfMemoryError
at java.lang.String.<init> in String.java on Line 375
at java.lang.String.<init> in String.java on Line 238
at 安卓.util.Base64.encodeToString in Base64.java on Line 456
at com.xxx.xxxx.activity.XXXActivity$SubmitData.BitMapToString in XXXActivity.java on Line 530
at com.xxx.xxxx.activity.XXXActivity$SubmitData.doInBackground in XXXActivity.java on Line 339
at com.xxx.xxxx.activity.XXXActivity$SubmitData.doInBackground in XXXActivity.java on Line 1
at 安卓.os.AsyncTask$2.call in AsyncTask.java on Line 264
at java.util.concurrent.FutureTask$Sync.innerRun in FutureTask.java on Line 305
at java.util.concurrent.FutureTask.run in FutureTask.java on Line 137
at 安卓.os.AsyncTask$SerialExecutor$1.run in AsyncTask.java on Line 208
at java.util.concurrent.ThreadPoolExecutor.runWorker in ThreadPoolExecutor.java on Line 1076
at java.util.concurrent.ThreadPoolExecutor$Worker.run in ThreadPoolExecutor.java on Line 569
at java.lang.Thread.run in Thread.java on Line 856

Answer 1

我会看一看Androids开发人员关于加载大型位图并在将其保存到内存之前缩小它们的文档。这可能不是你需要的解决方案，但我相信它能帮你指明正确的方向

http://developer.android.com/training/displaying-bitmaps/load-bitmap.html

祝你好运