环境(运行HoneyComb 3.0.1的Xoom平板电脑的Linux/Eclipse Dev )
在我的应用程序中,我使用相机(startIntentForResult())来拍照。在拍摄图片之后,我得到了onActivityResult()回调,并且能够使用通过“拍摄图片”意图传递的Uri来加载位图。此时,我的活动继续进行,尝试将图像重新加载到图库时出现错误:
FATAL EXCEPTION: main
ERROR/AndroidRuntime(4148): java.lang.RuntimeException: Unable to resume activity {...}:
java.lang.IllegalStateException: trying to requery an already closed cursor
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2243)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1019)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:126)
at android.app.ActivityThread.main(ActivityThread.java:3997)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:491)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalStateException: trying to requery an already closed cursor
at android.app.Activity.performRestart(Activity.java:4337)
at android.app.Activity.performResume(Activity.java:4360)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2205)
... 10 more
我使用的唯一光标逻辑是,在拍摄图像之后,我使用以下逻辑将Uri转换为文件
String [] projection = {
MediaStore.Images.Media._ID,
MediaStore.Images.ImageColumns.ORIENTATION,
MediaStore.Images.Media.DATA
};
Cursor cursor = activity.managedQuery(
uri,
projection, // Which columns to return
null, // WHERE clause; which rows to return (all rows)
null, // WHERE clause selection arguments (none)
null); // Order-by clause (ascending by name)
int fileColumnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
if (cursor.moveToFirst()) {
return new File(cursor.getString(fileColumnIndex));
}
return null;
你知道我做错了什么吗?
https://stackoverflow.com/questions/5915597
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