java.lang.IllegalStateException: You cannot call onTextChanged with a non filterable adapter

来源：互联网发布：郑州大学网络教育学费编辑：程序博客网时间：2024/06/05 00:23

原因：项目里要做一个通讯录搜索功能，ListView的headview里有一个editText,通过给editText.addTextChangedListener(TextWatcher tw)来给外界提供接口，但是在搜索的过程中一直报错：

08-04 07:44:31.883: E/AndroidRuntime(1800): FATAL EXCEPTION: main08-04 07:44:31.883: E/AndroidRuntime(1800): java.lang.IllegalStateException: You cannot call onTextChanged with a non filterable adapter08-04 07:44:31.883: E/AndroidRuntime(1800): at android.widget.AbsListView.onTextChanged(AbsListView.java:5757)08-04 07:44:31.883: E/AndroidRuntime(1800): at android.widget.TextView.sendOnTextChanged(TextView.java:7372)08-04 07:44:31.883: E/AndroidRuntime(1800): at android.widget.TextView.handleTextChanged(TextView.java:7431)08-04 07:44:31.883: E/AndroidRuntime(1800): at android.widget.TextView$ChangeWatcher.onTextChanged(TextView.java:9142)08-04 07:44:31.883: E/AndroidRuntime(1800): at android.text.SpannableStringBuilder.sendTextChanged(SpannableStringBuilder.java:966)08-04 07:44:31.883: E/AndroidRuntime(1800): at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:500)08-04 07:44:31.883: E/AndroidRuntime(1800): at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:435)08-04 07:44:31.883: E/AndroidRuntime(1800): at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:30)08-04 07:44:31.883: E/AndroidRuntime(1800): at android.view.inputmethod.BaseInputConnection.replaceText(BaseInputConnection.java:677)08-04 07:44:31.883: E/AndroidRuntime(1800): at android.view.inputmethod.BaseInputConnection.commitText(BaseInputConnection.java:201)08-04 07:44:31.883: E/AndroidRuntime(1800): at com.android.internal.widget.EditableInputConnection.commitText(EditableInputConnection.java:183)08-04 07:44:31.883: E/AndroidRuntime(1800): at android.view.inputmethod.InputConnectionWrapper.commitText(InputConnectionWrapper.java:85)08-04 07:44:31.883: E/AndroidRuntime(1800): at com.android.internal.view.IInputConnectionWrapper.executeMessage(IInputConnectionWrapper.java:288)08-04 07:44:31.883: E/AndroidRuntime(1800): at com.android.internal.view.IInputConnectionWrapper$MyHandler.handleMessage(IInputConnectionWrapper.java:83)08-04 07:44:31.883: E/AndroidRuntime(1800): at android.os.Handler.dispatchMessage(Handler.java:99)08-04 07:44:31.883: E/AndroidRuntime(1800): at android.os.Looper.loop(Looper.java:137)08-04 07:44:31.883: E/AndroidRuntime(1800): at android.app.ActivityThread.main(ActivityThread.java:5457)08-04 07:44:31.883: E/AndroidRuntime(1800): at java.lang.reflect.Method.invokeNative(Native Method)08-04 07:44:31.883: E/AndroidRuntime(1800): at java.lang.reflect.Method.invoke(Method.java:525)08-04 07:44:31.883: E/AndroidRuntime(1800): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:875)08-04 07:44:31.883: E/AndroidRuntime(1800): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:691)08-04 07:44:31.883: E/AndroidRuntime(1800): at dalvik.system.NativeStart.main(Native Method)

从日志来看是与adapter以及filterable有关，搜索了大半天也没有什么有用的资料,只是知道了filterable是个接口，通常由adapter实现，用来过滤筛选数据。

实现它必须实现的方法： public Filter getFilter()；

另外它还有两个比较重要的方法：

protected FilterResults performFiltering(CharSequence prefix)；从方法名可以猜出这里执行过滤；

protected void publishResults(CharSequence constraint,FilterResults results)；发布结果，通常用来刷新adapter

我尝试着把自己的adapter实现filterable接口，然后自己写了一个Filter,问题就解决了。。。。有些莫名其妙！！！

1.首先实现接口

@Override    public Filter getFilter()    {        // TODO Auto-generated method stub        if (null==mFilter)        {            mFilter = new MyFilter();        }        return mFilter;    }

2.写一个Filter

private MyFilter mFilter;    private class MyFilter extends Filter{        @Override        protected FilterResults performFiltering(CharSequence constraint)        {            return null;        }        @Override        protected void publishResults(CharSequence constraint,FilterResults results)        {        }            }

就这样，不会再报java.lang.IllegalStateException: You cannot call onTextChanged with a non filterable adapter了。

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