1

所以我有一个应用程序，用户可以拍照并将其存储在本地。图像名称存储在我的 SQLite 数据库中，以供将来调用照片时参考。现在我已经追踪到将位图图像设置为图像视图的问题。这是我的代码：

    private void displayListView() {
    // TODO Auto-generated method stub

    Cursor cursor = info.getListData();
    String[] listViewColumns = new String[] { Database.KEY_BREWNAME, Database.KEY_BREWERY, Database.KEY_RATING,
            Database.KEY_DATEIMAGENAME, };
    int[] dataToListView = new int[] { R.id.tvBrewName, R.id.tvBrewery, R.id.tvRating, R.id.ivThumb, };

    dataAdapter = new SimpleCursorAdapter(this, R.layout.entrymain, cursor, listViewColumns, dataToListView, 0);

    ViewBinder viewBinder = new ViewBinder() {
        public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
            ImageView image = (ImageView)view;
            Log.w(TAG, "******************List Image loaded == " + columnIndex + " **********************");
            try {
                FileInputStream fis = openFileInput(cursor.getString(columnIndex));
                fis.close();
                Log.w(TAG, "******************List Image loaded == fis.close **********************");
                image.setImageBitmap(BitmapFactory.decodeStream(fis));
                Log.w(TAG, "******************List Image loaded == setimage success **********************");

            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return true;

        };
    };
    ImageView image = (ImageView)findViewById(R.id.ivThumb);
    viewBinder.setViewValue(image, cursor, cursor.getColumnIndex("date_image_name"));
    dataAdapter.setViewBinder(viewBinder);

    listview.setAdapter(dataAdapter);

代码在没有 ViewBinder 的情况下工作得很好，通过使用 log.w，我将问题追溯到 image.setImageBitmap(BitmapFactory.decodeStream(fis)) ，我不太明白为什么它不会像我一样设置图像在其他地方使用此代码取得了巨大成功。关于为什么它不会设置的任何想法，我发现这与 java.io.IOException: read failed: EBADF (Bad file number) 有关，但是我该如何解决这个问题？预先感谢！

这是我的错误日志的一部分：

 03-18 10:44:16.281: D/ActivityThread(19380): setTargetHeapUtilization:0.25
03-18 10:44:16.281: D/ActivityThread(19380): setTargetHeapIdealFree:8388608
03-18 10:44:16.281: D/ActivityThread(19380): setTargetHeapConcurrentStart:2097152
03-18 10:44:16.782: I/Adreno200-EGLSUB(19380): <ConfigWindowMatch:2087>: Format RGBA_8888.
03-18 10:44:16.792: E/(19380): <s3dReadConfigFile:75>: Can't open file for reading
03-18 10:44:16.792: E/(19380): <s3dReadConfigFile:75>: Can't open file for reading
03-18 10:44:17.112: D/AbsListView(19380): Get MotionRecognitionManager
03-18 10:44:17.152: W/Start(19380): ******************List Image loaded == 4 **********************
03-18 10:44:17.162: W/Start(19380): ******************List Image loaded == fis.close **********************
03-18 10:44:17.162: W/System.err(19380): java.io.IOException: read failed: EBADF (Bad file number)
03-18 10:44:17.172: W/System.err(19380):    at libcore.io.IoBridge.read(IoBridge.java:442)
03-18 10:44:17.172: W/System.err(19380):    at java.io.FileInputStream.read(FileInputStream.java:179)
03-18 10:44:17.172: W/System.err(19380):    at java.io.BufferedInputStream.fillbuf(BufferedInputStream.java:168)
03-18 10:44:17.172: W/System.err(19380):    at java.io.BufferedInputStream.read(BufferedInputStream.java:309)
03-18 10:44:17.172: W/System.err(19380):    at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
03-18 10:44:17.172: W/System.err(19380):    at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:619)
03-18 10:44:17.172: W/System.err(19380):    at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:691)
03-18 10:44:17.172: W/System.err(19380):    at com.ex.beerlog.Start$1.setViewValue(Start.java:78)
03-18 10:44:17.172: W/System.err(19380):    at com.ex.beerlog.Start.displayListView(Start.java:91)
03-18 10:44:17.172: W/System.err(19380):    at com.ex.beerlog.Start.onCreate(Start.java:56)
03-18 10:44:17.172: W/System.err(19380):    at android.app.Activity.performCreate(Activity.java:5048)
03-18 10:44:17.172: W/System.err(19380):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
03-18 10:44:17.172: W/System.err(19380):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2052)
03-18 10:44:17.172: W/System.err(19380):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2113)
03-18 10:44:17.182: W/System.err(19380):    at android.app.ActivityThread.access$700(ActivityThread.java:139)
03-18 10:44:17.182: W/System.err(19380):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1224)
03-18 10:44:17.182: W/System.err(19380):    at android.os.Handler.dispatchMessage(Handler.java:99)
03-18 10:44:17.182: W/System.err(19380):    at android.os.Looper.loop(Looper.java:137)
03-18 10:44:17.182: W/System.err(19380):    at android.app.ActivityThread.main(ActivityThread.java:4918)
03-18 10:44:17.182: W/System.err(19380):    at java.lang.reflect.Method.invokeNative(Native Method)
03-18 10:44:17.182: W/System.err(19380):    at java.lang.reflect.Method.invoke(Method.java:511)
03-18 10:44:17.182: W/System.err(19380):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1004)
03-18 10:44:17.182: W/System.err(19380):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:771)
03-18 10:44:17.182: W/System.err(19380):    at dalvik.system.NativeStart.main(Native Method)
03-18 10:44:17.182: W/System.err(19380): Caused by: libcore.io.ErrnoException: read failed: EBADF (Bad file number)
03-18 10:44:17.182: W/System.err(19380):    at libcore.io.Posix.readBytes(Native Method)
03-18 10:44:17.182: W/System.err(19380):    at libcore.io.Posix.read(Posix.java:118)
03-18 10:44:17.182: W/System.err(19380):    at libcore.io.BlockGuardOs.read(BlockGuardOs.java:149)
03-18 10:44:17.182: W/System.err(19380):    at libcore.io.IoBridge.read(IoBridge.java:432)
03-18 10:44:17.182: W/System.err(19380):    ... 23 more
4

1 回答 1

3

您正在尝试从已关闭的InputStream. fis.close();必须在之后调用image.setImageBitmap(BitmapFactory.decodeStream(fis));

此外，setViewValue如果您确实将值设置为，则必须检查方法ImageView：

ViewBinder viewBinder = new ViewBinder() {
    public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
        if (!(view instanceof ImageView) || view.getId() != R.id.ivThumb) {
            return false;
        }

        // the rest of the code
    };
};

最后一件事。您不需要显式调用viewBinder.setViewValue(image, cursor, cursor.getColumnIndex("date_image_name"));，因为SimpleAdapter它会为您完成。只需删除此行，一切都应该正常。

于 2013-03-18T16:54:49.170 回答