带有 simplecursor 适配器的 Android 列表视图使应用程序崩溃（未显示 ANR）

Question

在使用 simplecursor 适配器时，我对 listview 有一个奇怪的问题。这是错误

08-31 21:50:14.540: INFO/dalvikvm(12195): Uncaught exception thrown by finalizer (will be discarded):
08-31 21:50:14.540: INFO/dalvikvm(12195): java.lang.IllegalStateException: Binder has been finalized!
08-31 21:50:14.540: INFO/dalvikvm(12195):     at android.os.BinderProxy.transact(Native Method)
08-31 21:50:14.540: INFO/dalvikvm(12195):     at android.database.BulkCursorProxy.close(BulkCursorNative.java:289)
08-31 21:50:14.540: INFO/dalvikvm(12195):     at android.database.BulkCursorToCursorAdaptor.close(BulkCursorToCursorAdaptor.java:141)
08-31 21:50:14.540: INFO/dalvikvm(12195):     at android.database.CursorWrapper.close(CursorWrapper.java:43)
08-31 21:50:14.540: INFO/dalvikvm(12195):     at android.content.ContentResolver$CursorWrapperInner.close(ContentResolver.java:1575)
08-31 21:50:14.540: INFO/dalvikvm(12195):     at android.content.ContentResolver$CursorWrapperInner.finalize(ContentResolver.java:1586)
08-31 21:50:14.540: INFO/dalvikvm(12195):     at dalvik.system.NativeStart.run(Native Method)

我在我的 cursorAdapter 中实现了 runQueryOnBackgroundThread，它由活动中的 Filter.filter 方法调用调用。所以我的活动中没有任何光标参考。每次我查询时，我都知道我的光标适配器中的光标更改回调，它扩展了 SimpleCursorAdapter

这是它的样子

public void changeCursor(Cursor cursor) {
        Log.d(TAG, "Cursor changed ... **************** "+ cursor);
        if (cursor != null) {
            setLoading(false);
        }
        super.changeCursor(cursor);
        initSectionHeaders(cursor);
        notifyDataSetChanged();
    }

runQueryOnBackgroundThread() 只是从查询中返回一个游标。

我是否遗漏了什么，应该在任何地方关闭或管理光标吗？对线索的任何帮助都会有很大帮助。提前致谢。

**UPDATE** 我的适配器的片段

public Cursor runQueryOnBackgroundThread(CharSequence constraint) {
        Log.d(TAG, "runQueryOnBackgroundThread "+ constraint);
        if (getFilterQueryProvider() != null) {
            return getFilterQueryProvider().runQuery(constraint);
        }
        return doQuery(constraint, People.CONTENT_URI);
    }

private Cursor doQuery(CharSequence constraint, Uri queryUri){
        StringBuilder selectionStrBuilder = new StringBuilder();
        String selectionArgs[] = null;
        String selection = null;

        if(constraint!=null){
            //ADDING GLOB so that the sql query can interpret linux style wildcards
            selectionStrBuilder.append("(UPPER(").append(People.DISPLAY_NAME).append(") GLOB ?)");

            selection = selectionStrBuilder.toString();
            String constraintStr = constraint.toString().toUpperCase();

            //prepend and append '*' - TODO improve
            constraintStr = "*"+ constraintStr;
            constraintStr +="*";

            selectionArgs = new String[]{constraintStr};
        }
        ContentResolver contentRes = context.getContentResolver();
        return contentRes.query(queryUri, null, selection, selectionArgs, People.DISPLAY_NAME);
    }

除了这两个函数之外，我已经覆盖了之前发布的 changeCursor 并在绑定视图中使用光标来获取数据。我不会在其他任何地方关闭或修改游标属性。

我的提供者 getQuery 函数看起来像

SQLiteDatabase db = dbHelper.getReadableDatabase();
        Cursor c = qb.query(db, projection, selection, selectionArgs, null, null, orderBy);

        // Tell the cursor what uri to watch,
        // so it knows when its source data changes
        c.setNotificationUri(getContext().getContentResolver(), uri);
        return c;

UPDATE2*

当我在模拟器上运行相同的程序时，我得到了这个堆栈跟踪，这与我在平板电脑上看到的非常不同。

01-03 17:21:44.130: ERROR/IMemory(9328): binder=0x3891a0 transaction failed fd=-2147483647, size=0, err=-2147483646 (Unknown error: 2147483646)
01-03 17:21:44.130: ERROR/IMemory(9328): cannot dup fd=-2147483647, size=0, err=-2147483646 (Bad file number)
01-03 17:21:44.130: ERROR/IMemory(9328): cannot map BpMemoryHeap (binder=0x3891a0), size=0, fd=-1 (Bad file number)
01-03 17:21:44.130: WARN/dalvikvm(9328): JNI WARNING: JNI method called with exception raised
01-03 17:21:44.130: WARN/dalvikvm(9328):              in Ldalvik/system/NativeStart;.run ()V (CallStaticVoidMethodV)
01-03 17:21:44.130: WARN/dalvikvm(9328): Pending exception is:
01-03 17:21:44.130: INFO/dalvikvm(9328): Ljava/lang/RuntimeException;: No memory in memObj
01-03 17:21:44.130: INFO/dalvikvm(9328):     at android.database.CursorWindow.native_init(Native Method)
01-03 17:21:44.130: INFO/dalvikvm(9328):     at android.database.CursorWindow.<init>(CursorWindow.java:518)
01-03 17:21:44.130: INFO/dalvikvm(9328):     at android.database.CursorWindow.<init>(CursorWindow.java:27)
01-03 17:21:44.130: INFO/dalvikvm(9328):     at android.database.CursorWindow$1.createFromParcel(CursorWindow.java:493)
01-03 17:21:44.130: INFO/dalvikvm(9328):     at android.database.CursorWindow$1.createFromParcel(CursorWindow.java:491)
01-03 17:21:44.130: INFO/dalvikvm(9328):     at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:103)
01-03 17:21:44.130: INFO/dalvikvm(9328):     at android.os.Binder.execTransact(Binder.java:320)
01-03 17:21:44.130: INFO/dalvikvm(9328):     at dalvik.system.NativeStart.run(Native Method)
01-03 17:21:44.130: INFO/dalvikvm(9328): "Binder Thread #3" prio=5 tid=9 NATIVE
01-03 17:21:44.130: INFO/dalvikvm(9328):   | group="main" sCount=0 dsCount=0 obj=0x405de828 self=0x8e288
01-03 17:21:44.130: INFO/dalvikvm(9328):   | sysTid=9336 nice=0 sched=0/0 cgrp=[fopen-error:24] handle=959480
01-03 17:21:44.130: INFO/dalvikvm(9328):   at dalvik.system.NativeStart.run(Native Method)
01-03 17:21:44.130: ERROR/dalvikvm(9328): VM aborting

然后使应用程序崩溃。

我发现了一个关于这个问题的错误报告here

有人遇到过同样的问题吗？任何帮助，将不胜感激。 谢谢

Answer 1

啊终于找到了解决这个可怕问题的方法。只是框架其他部分的某个光标是打开的。关闭时工作。