奇怪的IndexOUBException使用listview内的按钮

时间：2010-12-14 17:01:25

标签： android listview

我在使用包含按钮的列表视图的活动中遇到一个非常奇怪的问题。

错误似乎随机弹出（虽然我们知道它并不存在），我的意思是说我无法获得一个定义的模式来重现错误。它经常发生。

我试图解决这个问题的一个大问题是logCat在我的代码中没有显示错误，只是在（我相信）android用于确定点击来自的视图的代码中。请注意，错误中没有提到不属于android / java的包。

logcat的：

12-14 12:04:20.994: ERROR/AndroidRuntime(5619): FATAL EXCEPTION: main
12-14 12:04:20.994: ERROR/AndroidRuntime(5619): java.lang.IndexOutOfBoundsException
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at java.util.Arrays$ArrayList.get(Arrays.java:77)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.ArrayAdapter.getItem(ArrayAdapter.java:298)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:351)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.ArrayAdapter.getView(ArrayAdapter.java:323)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.Spinner.makeAndAddView(Spinner.java:189)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.Spinner.layout(Spinner.java:148)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.Spinner.onLayout(Spinner.java:112)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.view.View.layout(View.java:7032)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1249)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1125)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.LinearLayout.onLayout(LinearLayout.java:1042)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.view.View.layout(View.java:7032)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1249)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1238)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.LinearLayout.onLayout(LinearLayout.java:1044)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.view.View.layout(View.java:7032)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1249)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1125)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.LinearLayout.onLayout(LinearLayout.java:1042)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.view.View.layout(View.java:7032)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.view.View.layout(View.java:7032)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1249)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1125)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.LinearLayout.onLayout(LinearLayout.java:1042)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.view.View.layout(View.java:7032)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.view.View.layout(View.java:7032)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.view.ViewRoot.performTraversals(ViewRoot.java:1055)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1737)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.os.Handler.dispatchMessage(Handler.java:99)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.os.Looper.loop(Looper.java:123)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at android.app.ActivityThread.main(ActivityThread.java:4627)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at java.lang.reflect.Method.invokeNative(Native Method)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at java.lang.reflect.Method.invoke(Method.java:521)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-14 12:04:20.994: ERROR/AndroidRuntime(5619):     at dalvik.system.NativeStart.main(Native Method)

这是我的自定义ArrayAdapter代码，当我从各行反复点击各种“boton_modificar”时会发生错误，主要是如果我快速点击它们。

private class CustomAdapter extends ArrayAdapter<DataType> {

  public CustomAdapter(Context context, int resource,List<DataType> objects) {
   super(context, resource, objects);
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
   View row = convertView;

   final int position2 = position;

   if (row == null) {
    LayoutInflater inflater = getLayoutInflater();
    row = inflater.inflate(R.layout.row_layout,parent,false);
   }

   //Some more code here

   ImageButton boton_modificar = (ImageButton) row.findViewById(R.id.modificar);
   boton_modificar.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {
     DataT t = tr.get(position2);
     ((EditText) (findViewById(R.id.monto))).setText(Double.toString(t.m));
     ((Spinner) (findViewById(R.id.spinnerTipoB))).setSelection(t.posSTB);
     ((Spinner) (findViewById(R.id.spinnerB))).setSelection(t.posSB);
    }
   });
   return (row);
  }
 }

anybode是否有任何想法可能是什么？我厌倦了试图弄清楚这一点，没有。我发现的大多数都是类似问题的错误报告，但我怀疑它是一回事，无论如何the report is here.

提前致谢Stefano

编辑：

错误弹出之前的LogCat，怀疑它与位置集有什么关系。

12-16 15:12:56.159: INFO/position2(21828): 7
12-16 15:12:56.159: INFO/Spinner A # elements:(21828): 3
12-16 15:12:56.159: INFO/Assigned position(21828): 1
12-16 15:12:56.159: INFO/Spinner B # elements:(21828): 20
12-16 15:12:56.159: INFO/Assigned position(21828): 5

添加了代码：

spinnerTipoB.setOnItemSelectedListener(new OnItemSelectedListener() {
                    @Override
                    public void onItemSelected(AdapterView<?> arg0, View arg1,
                            int position, long arg3) {
                        int posId = tipoBIds[position];
                        if (posId == 0) {
                                spinnerB.setAdapter(arrayAdapterBP);
                        } else if (posId == 1) {
                            spinnerB.setAdapter(arrayAdapterBT);
                        } else if (posId == 2) {
                            spinnerB.setAdapter(arrayAdapterBO);
                        }
                    }

                    @Override
                    public void onNothingSelected(AdapterView<?> arg0) {
                        // Do Nothing
                    }
                });

spinnerB对位置选择不执行任何操作。 所有spinner数组适配器都是这样创建的：

arrayAdapterNAME = new ArrayAdapter<String>(this, R.layout.layoutspinner, DATA);

我会假设错误是因为((Spinner) (findViewById(R.id.spinnerB))).setSelection(t.posSB);在spinnerB.setAdapter(arrayAdapterNAME)完成之前执行了吗？

1 个答案:

答案 0 :(得分：3)

此问题与ListView's适配器无关，而与Spinner适配器有关。

当您点击其中一个按钮时，您会在两个微调器上调用setSelection()。如果你检查AbsSpinner.setSelection(int)中的代码，你会看到它缓存了新选择项的整数索引，并调用requestLayout()重绘自己（稍后一点）。

当UI线程处理布局消息时，它会布局视图树中的所有内容，但在布置Spinner时会爆炸，因为之前缓存的索引不再有效。有些东西改变了适配器的列表......这必须发生在响应UI事件（例如Button onClick（））并且在处理布局消息之前得到处理。

以后添加的评论和代码添加到O.P。：

错误的假设是Spinner.setSelection()会导致onItemSelectedListener事件在返回之前运行。此特定问题的修复是从按钮onClick（）设置微调器适配器，然后设置选定的索引。

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