安卓系统中的Imageview和OutOfMemory
安卓系统中的Imageview和OutOfMemory
提问于 2011-07-25 18:27:54
Stackoverflow的朋友们：
我需要一个应用程序，使用相机捕获图像并将其显示在图像视图中，我将此图片发送到server.For这个过程中，我使用了名为myBackgroundUploader的AsynTask类。当我点击按钮时，我调用了Asysnctask.我做到了，但在拍了2张，3张照片后，我的应用程序发生了内存不足错误，应用程序强制关闭。我尝试了recycle()，null值，但没有用。有人能告诉我如何避免这个错误吗？.This是我得到的日志。
onCreate()
{
setContentView(R.layout.detail_profile);
String fname=new File(getFilesDir(), "MyFile.jpeg").getAbsolutePath();
if(imgView!=null)
{
imgView.destroyDrawingCache();
}
imgView=(ImageView)findViewById(R.id.imageView1);
imgView.setImageURI(Uri.fromFile(new File(fname)));
}
public void onClick(View v) {
if(checkInternetConnection()==false)
{
new AlertDialog.Builder(detailProfile.this).setTitle("Warning!").setMessage("No Internet connection").setIcon(R.drawable.icon).setNeutralButton("Close", null).show();
} if(diTask!=null)
{
AsyncTask.Status diStatus=diTask.getStatu();
if(diStatus!=AsyncTask.Status.FINISHED)
{
return;
}
}
fileprocess();
diTask=new myBackgroundUploader(detailProfile.this);
diTask.execute("url for server");
}
myBackgroundUploader.java
protected void onPreExecute()
{
progDailog = ProgressDialog.show(mcontext,
"Syncing with server ", "Please wait....",
true);
}
protected Bitmap doInBackground(String...pram)
{
Log.v("doback","uploading,,");
uploadImage(pram[0]); //here parm[0]is my server url
return null;
}
protected void onPostExecute(Bitmap bm)
{
}
public void uploadImage(String...urls)
{
String fname=new File(mcontext.getFilesDir(),"MyFile.jpeg").getAbsolutePath();
Bitmap testAB=null;
BitmapFactory.Options options= new BitmapFactory.Options();
options.inSampleSize = 4;
testAB=BitmapFactory.decodeFile(fname, options);
ByteArrayOutputStream bao = new ByteArrayOutputStream();
testAB.compress(Bitmap.CompressFormat.JPEG,50, bao);
byte [] ba = bao.toByteArray();
String ba1=Base64.encodeBytes(ba);
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("image",ba1));
nameValuePairs.add(new BasicNameValuePair("address",detailProfile.address.getText().toString()));
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(urls[0]);
HttpParams param=new BasicHttpParams();
HttpConnectionParams.setSoTimeout(param, 60000);
httppost.setParams(param);
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is =entity.getContent();
progDailog.dismiss();
//urls[0].recycle();
ba=null;
ba1=null;
bao.flush();
testAB.recycle();
}
07-25 15:39:38.613: ERROR/dalvikvm-heap(31423): 9830400-byte external allocation too large for this process.
07-25 15:39:38.640: ERROR/GraphicsJNI(31423): VM won't let us allocate 9830400 bytes
07-25 15:39:38.640: DEBUG/dalvikvm(31423): GC_FOR_MALLOC freed 1K, 48% free 2904K/5511K, external 21335K/23354K, paused 16ms
07-25 15:39:38.644: DEBUG/skia(31423): --- decoder->decode returned false
07-25 15:39:38.656: WARN/dalvikvm(31423): threadid=9: thread exiting with uncaught exception (group=0x40015560)
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): FATAL EXCEPTION: AsyncTask #1
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): java.lang.RuntimeException: An error occured while executing doInBackground()
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): at android.os.AsyncTask$3.done(AsyncTask.java:200)
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): at java.util.concurrent.FutureTask.run(FutureTask.java:138)
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): at java.lang.Thread.run(Thread.java:1019)
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): Caused by: java.lang.OutOfMemoryError: bitmap size exceeds VM budget
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:470)
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:284)
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:309)
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): at com.rodasys.profile.myBackgroundUploader.uploadImage(myBackgroundUploader.java:133)
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): at com.rodasys.profile.myBackgroundUploader.doInBackground(myBackgroundUploader.java:57)
07-25 15:39:38.664: ERROR/AndroidRuntime(31423): at com.rodasys.profile.myBackgroundUploader.doInBackground(myBackgroundUploader.java:1)提前感谢
回答 2
Stack Overflow用户
回答已采纳
发布于 2011-07-25 20:49:29
是的，imageview是一个静态文件。公共静态ImageView imgView
这似乎是导致内存泄漏和内存不足的问题。您可能想要阅读这篇关于如何避免它的优秀文章：http://www.curious-creature.org/2008/12/18/avoid-memory-leaks-on-android/
简而言之:不要使用静态实例变量。删除static应该没问题(如果它不会损害代码的逻辑)，否则您将不得不重新设计没有包含ImageView的静态字段的活动。
Stack Overflow用户
发布于 2011-07-25 19:31:46
我认为你应该在对图像进行任何繁重的操作之前做recycle。因此，我建议你尝试一下，而不是做你已经做过的事情：
if (testAB != null) {
testAB.recycle();
}
// do your heavy image operation here在对图像执行某些操作时，尤其是在将图像分配给UI元素(例如ImageView )时，不要忘记使用诸如AsyncTask之类的后台进程。
并尝试将解码后的图像放入您的ImageView中，而不是原始图像，因为原始图像的大小可能总是大于解码后的图像。
如果这对你有效，请告诉我。
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原文链接：
https://stackoverflow.com/questions/6814718
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