android 自定义车牌省份键盘，点击键盘按钮无响应

问题

自定义车牌省份键盘KeyboardView.OnKeyboardActionListener中onPress(int primaryCode)方法，打印参数primaryCode为0

解决办法

新建KeyBoard类继承android.inputmethodservice.Keyboard，重写getNearestKeys()方法。

package com.sybil052.xxx.views;

import android.content.Context;
import android.inputmethodservice.Keyboard;

import java.util.List;

public class KeyBoard extends Keyboard {
    public KeyBoard(Context context, int xmlLayoutResId) {
        super(context, xmlLayoutResId);
    }

    public KeyBoard(Context context, int xmlLayoutResId, int modeId, int width, int height) {
        super(context, xmlLayoutResId, modeId, width, height);
    }

    public KeyBoard(Context context, int xmlLayoutResId, int modeId) {
        super(context, xmlLayoutResId, modeId);
    }

    public KeyBoard(Context context, int layoutTemplateResId, CharSequence characters, int columns, int horizontalPadding) {
        super(context, layoutTemplateResId, characters, columns, horizontalPadding);
    }

    @Override
    public int[] getNearestKeys(int x, int y) {
        List<Key> keys = getKeys();
        Key[] mKeys = keys.toArray(new Key[keys.size()]);
        int i = 0;
        for (Key key : mKeys) {
            if(key.isInside(x, y)) {
                return new int[]{i};
            }
            i++;
        }
        return new int[0];
    }
}