Android : java.lang.IndexOutOfBoundsException:无效索引5，大小为4

Question

我正在实现从网格视图中删除多个图像，点击删除按钮。我已经将复选框和图像视图放在网格视图中，我在图像上选中了多个复选框--这些图像被删除了，但是有时我的应用程序崩溃了，并且得到了java.lang.IndexOutOfBoundsException:无效索引5的例外，在复选框中的为4，在复选框中单击event.How来解决这个问题。

以下是我在Adapter类中的代码

final BitmapItems item = data.get(position);
        //holder.imageTitle.setText(item.getTitle());
        holder.image.setImageBitmap(item.getBitmap());
            final int pos = position;
            Log.e("pos ", " = " + pos);

            holder.checkbox.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v)
                {
                    CheckBox cb = (CheckBox) v;
                    Toast.makeText(getContext(), "Clicked on Checkbox: " + cb.getText() + " is " + cb.isChecked(), Toast.LENGTH_LONG).show();
                    if(cb.isChecked())
                    {
                        int checked = 1;
                        Log.e("", "" + checked);
                        String path = ((String) f.get(pos));
                        selectedFile.add(path);
                        Log.e("path ", " = " + path);
                        data.remove(pos);
                    }
                    else
                    {
                        int checked = 0;
                        Log.e("",""+ checked);
                    }
                }
            });

这是我在活动中的删除按钮代码

imgDeleteImagesFromGallery = (ImageView)findViewById(R.id.imgDeleteImage);
        imgDeleteImagesFromGallery.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v)
            {
                gridAdapter.notifyDataSetChanged();

                Iterator iterator = selectedFile.iterator();
                while (iterator.hasNext())
                {
                    gridFilePath = new File(iterator.next().toString());
                    if(gridFilePath.exists())
                    {
                        gridFilePath.delete();
                        Log.e("File deleted","Succesfully !!");
                    }
                }
            }
        });

在这里，日志猫错误

10-14 04:16:02.635  15018-15018/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.example.tazeen.classnkk, PID: 15018
    java.lang.IndexOutOfBoundsException: Invalid index 5, size is 4
            at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
            at java.util.ArrayList.remove(ArrayList.java:403)
            at com.example.tazeen.classnkk.AddPost$GridView_Adapter$1.onClick(AddPost.java:931)
            at android.view.View.performClick(View.java:4756)
            at android.widget.CompoundButton.performClick(CompoundButton.java:125)
            at android.view.View$PerformClick.run(View.java:19748)
            at android.os.Handler.handleCallback(Handler.java:739)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:898)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:693)

Answer 1

由于数组大小为4计数，从(0-4)开始，而索引为5计数，则从(1-5)开始，因此使用了以下代码。我增加了一个职位-1

final BitmapItems item = data.get(position);
        //holder.imageTitle.setText(item.getTitle());
        holder.image.setImageBitmap(item.getBitmap());
            final int pos = position;
            Log.e("pos ", " = " + pos);

            holder.checkbox.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v)
                {
                    CheckBox cb = (CheckBox) v;
                    Toast.makeText(getContext(), "Clicked on Checkbox: " + cb.getText() + " is " + cb.isChecked(), Toast.LENGTH_LONG).show();
                    if(cb.isChecked())
                    {
                        int checked = 1;
                        Log.e("", "" + checked);
                        String path = ((String) f.get(pos));
                        selectedFile.add(path);
                        Log.e("path ", " = " + path);
                        data.remove(pos-1);
                    }
                    else
                    {
                        int checked = 0;
                        Log.e("",""+ checked);
                    }
                }
            });

Answer 2

尝试将pos设置为position- 1，因为复选框位置可能不是从0开始，而是从1开始。

这将解释为什么索引试图访问数组大小+ 1。

我认为正确的地方是在这条线上：

holder.image.setImageBitmap(item.getBitmap());
        final int pos = position - 1 ; //here
        Log.e("pos ", " = " + pos);