Question

当我单击应用程序中的URL图像或目录时，我失去了联系，这是我的代码和错误，

设置GridView方法

  private void setupGridView(String stringDirectory) {
    Log.d(TAG, "setupGridView: directory chosen: " + stringDirectory);
    final ArrayList<String> imgURLs = FileSearch.getFilePath(stringDirectory);

    //set the grid column width
    int gridWidth = getResources().getDisplayMetrics().widthPixels;
    int imageWidth = gridWidth / NUM_GRID_COLUMNS;
    gridView.setColumnWidth(imageWidth);

    //use the grid adapter to adapter the images to gridview
    GridImageViewAdapter adapter = new GridImageViewAdapter(getActivity(), R.layout.layout_grid_image_view, mAppend, imgURLs);
    gridView.setAdapter(adapter);

    //set the first image to be displayed when the activity fragment view is inflated

        setImage(imgURLs.get(0), glImageView, mAppend);


    gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Log.d(TAG, "onItemClick: selected an image: " + imgURLs.get(position));

            setImage(imgURLs.get(position), glImageView, mAppend);
        }
    });
}

当我尝试单击没有图像的目录时出现此错误。

错误

 java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
    at java.util.ArrayList.get(ArrayList.java:411)
    at com.tugasakhir.batikdetections.fragment.batiklopedia.InputFragment.setupGridView(InputFragment.java:154)
    at com.tugasakhir.batikdetections.fragment.batiklopedia.InputFragment.access$100(InputFragment.java:37)
    at com.tugasakhir.batikdetections.fragment.batiklopedia.InputFragment$3.onItemSelected(InputFragment.java:129)
    at android.widget.AdapterView.fireOnSelected(AdapterView.java:936)
    at android.widget.AdapterView.dispatchOnItemSelected(AdapterView.java:925)
    at android.widget.AdapterView.-wrap1(AdapterView.java)
    at android.widget.AdapterView$SelectionNotifier.run(AdapterView.java:895)
    at android.os.Handler.handleCallback(Handler.java:836)
    at android.os.Handler.dispatchMessage(Handler.java:103)
    at android.os.Looper.loop(Looper.java:232)
    at android.app.ActivityThread.main(ActivityThread.java:6661)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1106)
    at com.an-droid.internal.os.ZygoteInit.main(ZygoteInit.java:967)

此错误将我带到setImage(imgURLs.get(0), glImageView, mAppend);，如果其他类似原因，我会尝试将其插入

  if (imgURLs.get(0).equals(null)) {
        simpleActivity.toastMessage(getActivity(), "There is no image on " + mAppend);
    } else { 
        setImage(imgURLs.get(0), glImageView, mAppend);
    }

但是它根本不起作用。它说imgURLs.get(0).equals(null) is always false，所以..任何人都可以帮助我T？T ??

我如何绕过setImages的边界？

0 个答案: