[英]RejectedExecutionException when loading bitmaps for ListView with asyncTask
我正在嘗試使用按需生成的位圖創建ListView。 我正在使用https://github.com/chrisbanes/Android-BitmapCache緩存位圖
我正在使用一個SimpleAdapter,它是:
setViewBinder(new SimpleAdapter.ViewBinder() {
@Override
public boolean setViewValue(View view, Object object,String string) {
if( string.startsWith("ClassName:") ){
final ImageView yourImageView=(ImageView) view;
AsyncTask<String, Void, Bitmap> imageLoadAsyncTask = new AsyncTask<String, Void, Bitmap>() {
String cname;
@Override
protected Bitmap doInBackground(String... classnames) {
cname=classnames[0];
return db.getCharIcon(classnames[0]);
}
@Override
protected void onPostExecute(Bitmap bitmap) {
yourImageView.setImageBitmap(bitmap);
}
};
imageLoadAsyncTask.execute(string.substring(TextUtils.getTrimmedLength("ClassName:")));
return true;
}
return false;
}
}
getCharIcon函數在這里:
Bitmap getCharIcon(String classname){
Bitmap modBmp;
CacheableBitmapDrawable cacheBmp=mCache.get(classname);
if(cacheBmp==null)
{
modBmp=createCharIcon(classname);
mCache.put(classname,modBmp);
}
else
{
modBmp=cacheBmp.getBitmap();
}
return modBmp;
}
在這里createCharIcon以這種方式生成位圖(我尚未實現選擇圖像的良好部分的最終版本):
Bitmap createCharIcon(String classname)
{
Bitmap modBmp = Bitmap.createBitmap(srcBmp,0,0,60,60);
return modBmp;
}
可悲的是我遇到了這個錯誤:
07-02 14:13:04.248 11592-11592/com.lectem.gecharacters E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.util.concurrent.RejectedExecutionException
at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:1876)
at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:774)
at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1295)
at android.os.AsyncTask.execute(AsyncTask.java:394)
at com.lectem.gecharacters.CharFragment$1.setViewValue(CharFragment.java:110)
at android.widget.SimpleAdapter.bindView(SimpleAdapter.java:168)
at android.widget.SimpleAdapter.createViewFromResource(SimpleAdapter.java:126)
at android.widget.SimpleAdapter.getView(SimpleAdapter.java:114)
at android.widget.AbsListView.obtainView(AbsListView.java:1294)
at android.widget.ListView.makeAndAddView(ListView.java:1730)
at android.widget.ListView.fillDown(ListView.java:655)
at android.widget.ListView.fillSpecific(ListView.java:1287)
at android.widget.ListView.layoutChildren(ListView.java:1573)
at android.widget.AbsListView.onLayout(AbsListView.java:1147)
at android.view.View.layout(View.java:7035)
at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
at android.view.View.layout(View.java:7035)
at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
at android.view.View.layout(View.java:7035)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1252)
at android.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1241)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1047)
at android.view.View.layout(View.java:7035)
at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
at android.view.View.layout(View.java:7035)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1252)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1128)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1045)
at android.view.View.layout(View.java:7035)
at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
at android.view.View.layout(View.java:7035)
at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
at android.view.View.layout(View.java:7035)
at android.view.ViewRoot.performTraversals(ViewRoot.java:1045)
at android.view.ViewRoot.handleMessage(ViewRoot.java:1727)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4627)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
at dalvik.system.NativeStart.main(Native Method)
當我向后快速滾動列表時出現此錯誤,因此我想它與我可以使用的asyncTasks的數量有關...我真的不確定這是否應該做,但是該庫bitmapLruCache需要在主線程以外的其他線程上運行。
通常,該錯誤意味着您嘗試一次使用太多的AsyncTasks
。 在AdapterView
,如果您為每個項目(例如ListView
每一行)派生一個AsyncTask
而不考慮行回收,並且用戶將列表AdapterView
,就會發生這種情況。
引用圖書館的文檔 :
如果您希望庫和回收功能正常工作,則必須盡可能使用捆綁的CacheableImageView。
由於您似乎正在AdapterView
使用它,因此請確保您正在使用CacheableImageView
。
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