显示AutocompleteTextView中的所有项目而不写入文本

Question

我有一个AutocompleteTextView，它工作得很好。当我写入一个word时，它会显示相关的结果，但我想在AutoCompleteTextView中显示所有项，而不写入任何word。我怎么能那么做。

Answer 1

您需要扩展AutoCompleteTextView,

“当阈值小于或等于0时,应用阈值1。”

设置阈值

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);
    }
    }

}

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