显示 AutocompleteTextView 中的所有项目而不写入文本 [英] Show all items in AutocompleteTextView without writing text

问题描述

我有一个 AutocompleteTextView，它工作正常.当我写一个单词时，它会显示相关结果，但我想显示所有项目而不在 AutocompleteTextView 中写任何单词.我怎样才能做到这一点.

I have a AutocompleteTextView and it works fine. When I write a word it shows the relevant result but I want to show all items without writing any word in AutocompleteTextView. How can I do that.

推荐答案

需要扩展AutoCompleteTextView，

You need to extend AutoCompleteTextView,

"当阈值小于等于0时，阈值为1已申请.".

"When threshold is less than or equals 0, a threshold of 1 is applied.".

setThreshold

import android.content.Context;  
import android.graphics.Rect;
import android.util.AttributeSet;
import android.widget.AutoCompleteTextView;

public class InstantAutoComplete extends AutoCompleteTextView {

    public InstantAutoComplete(Context context) {
        super(context);
    }

    public InstantAutoComplete(Context arg0, AttributeSet arg1) {
        super(arg0, arg1);
    }

    public InstantAutoComplete(Context arg0, AttributeSet arg1, int arg2) {
        super(arg0, arg1, arg2);
    }

    @Override
    public boolean enoughToFilter() {
        return true;
    }

    @Override
    protected void onFocusChanged(boolean focused, int direction,
            Rect previouslyFocusedRect) {
        super.onFocusChanged(focused, direction, previouslyFocusedRect);
       if (focused && getFilter()!=null) {
        performFiltering(getText(), 0);
    }
    }

}

在xml中

<AutoCompleteTextView ... /> to <your.namespace.InstantAutoComplete ... />

编辑 1

创建名为 InstantAutoComplete 的新类，然后将此代码放入该类中.

Create new class named InstantAutoComplete then put this code into the class.

在你的布局 xml 中使用这个类就像

In your layout xml use this class like

然后在您的活动中找到这个小部件(onCreate 方法).

then find this widget in your actity (onCreate method).

看看这个例子

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