我正在使用android SDK 2.2在Eclipse构建ID 20090920-1017中开发应用程序并在Google Nexus One上进行测试.出于以下测试的目的,我在非根电话上使用IME“Android键盘”.

我有一个EditText小部件,它表现出一些非常奇怪的行为.我可以输入文字,然后按“del”键删除该文字;但在输入’space’字符后,“del”键将不再删除该空格字符前的字符.

一个例子说千言万语,所以请考虑以下两个非常简单的应用……

示例1：LinearLayout小部件中的EditText：

package com.example.linear.edit;

import android.app.Activity;
import android.os.Bundle;

import android.view.ViewGroup.LayoutParams;
import android.widget.EditText;
import android.widget.Gallery;
import android.widget.LinearLayout;

public class LinearEdit extends Activity
{
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);        

        LinearLayout layout = new LinearLayout(getApplicationContext());
        layout.setLayoutParams(new Gallery.LayoutParams(Gallery.LayoutParams.MATCH_PARENT, Gallery.LayoutParams.MATCH_PARENT));

        EditText edit = new EditText(getApplicationContext());
        layout.addView(edit, new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT)); 

        setContentView(layout);
    }
}

运行上面的应用程序,输入文本“编辑示例”,然后按“del”键几次,直到整个句子被删除.一切正常.

现在考虑示例2：Gallery小部件中的EditText：

package com.example.gallery.edit;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.Gallery;
import android.widget.LinearLayout;

public class GalleryEdit extends Activity
{
    private final String[] galleryData = {"string1", "string2", "string3"};

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);        

        Gallery gallery = new Gallery(getApplicationContext());

        gallery.setAdapter(new ArrayAdapter(getApplicationContext(), android.R.layout.simple_list_item_1, galleryData)
        {
            @Override
            public View getView(int position, View convertView, ViewGroup parent)
            {
                LinearLayout layout = new LinearLayout(getApplicationContext());
                layout.setLayoutParams(new Gallery.LayoutParams(Gallery.LayoutParams.MATCH_PARENT, Gallery.LayoutParams.MATCH_PARENT));

                EditText edit = new EditText(getApplicationContext());
                layout.addView(edit, new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT)); 

                return layout;
            }
        });

        setContentView(gallery);
    }
}

运行上面的应用程序,输入文本“编辑示例”,然后按“del”键几次.如果您遇到与我相同的问题,那么您会发现无法删除“空格”字符.一切都不顺利.

如果有人能够对这个问题有所了解,我将非常感激.

问候

解决方法:

我也遇到过这个问题.我没有编写自己的Gallery视图,而是覆盖了导致此问题的Gallery视图的行为.它基本上捕获了del(和return)键事件.我的解决方案

public class PatchedGallery extends Gallery
{
    public PatchedGallery(Context context)
    {
        super(context);
    }

    public PatchedGallery(Context context, AttributeSet attrs)
    {
        super(context, attrs);
    }

    public PatchedGallery(Context context, AttributeSet attrs, int defStyle)
    {
        super(context, attrs, defStyle);
    }

    @Override
    public boolean dispatchKeyEvent(KeyEvent event)
    {
        boolean handled = false;

        if (getFocusedChild() != null)
        {
            handled = getFocusedChild().dispatchKeyEvent(event);
        }

        if (!handled)
        {
            handled = event.dispatch(this, null, null);
        }

        return handled;
    }
}

我希望它可以为下一个有这个问题的人节省一些麻烦:)