2.18

我们在idea里创建一个Android项目，将图片各分到不同的文件夹里，然后再layout里创建几个主要的页面布局，具体效果如下

 同时今天还编写了小键盘

 然后通过一个java类来实现自定义小键盘的各项功能

package com.zhen.accountbook.utils;

import android.inputmethodservice.Keyboard;
import android.inputmethodservice.KeyboardView;
import android.text.Editable;
import android.text.InputType;
import android.view.View;
import android.widget.EditText;
import com.zhen.accountbook.R;

public class KeyBoardUtils {
    private final Keyboard k1;
    private KeyboardView keyboardView;
    private EditText editText;

    public interface OnEnsureListener {
        public void onEnsure();
    }

    OnEnsureListener onEnsureListener;

    public void setOnEnsureListener(OnEnsureListener onEnsureListener) {
        this.onEnsureListener = onEnsureListener;
    }

    public KeyBoardUtils(KeyboardView keyboardView, EditText editText) {
        this.keyboardView = keyboardView;
        this.editText = editText;
        this.editText.setInputType(InputType.TYPE_NULL);//取消弹出系统键盘
        k1 = new Keyboard(this.editText.getContext(), R.xml.key);
        this.keyboardView.setKeyboard(k1);//设置要显示键盘的样式
        this.keyboardView.setEnabled(true);
        this.keyboardView.setPreviewEnabled(false);
        this.keyboardView.setOnKeyboardActionListener(listener);//设置键盘按钮被点击的监听
    }

    KeyboardView.OnKeyboardActionListener listener = new KeyboardView.OnKeyboardActionListener() {
        @Override
        public void onPress(int i) {

        }

        @Override
        public void onRelease(int i) {

        }

        @Override
        public void onKey(int i, int[] ints) {
            Editable editable = editText.getText();
            int start = editText.getSelectionStart();
            switch (i) {
                case Keyboard.KEYCODE_DELETE:
                    if (editable != null && editable.length() > 0) {
                        if (start > 0) {
                            editable.delete(start - 1, start);
                        }
                    }
                    break;//点击了删除键
                case Keyboard.KEYCODE_CANCEL:
                    editable.clear();
                    break;//点击了清零
                case Keyboard.KEYCODE_DONE:
                    onEnsureListener.onEnsure();//通过接口回调的方法，当点击确定时，可以调用这个方法
                    break;//点击了完成
                default://其他的数字直接插入
                    editable.insert(start, Character.toString((char) i));
                    break;
            }
        }

        @Override
        public void onText(CharSequence charSequence) {

        }

        @Override
        public void swipeLeft() {

        }

        @Override
        public void swipeRight() {

        }

        @Override
        public void swipeDown() {

        }

        @Override
        public void swipeUp() {

        }
    };

    //显示键盘的方法
    public void showKeyBoard() {
        int visibility = keyboardView.getVisibility();
        if (visibility == View.INVISIBLE || visibility == View.GONE) {
            keyboardView.setVisibility(View.VISIBLE);
        }
    }

    //隐藏键盘的方法
    public void hideKeyBoard() {
        int visibility = keyboardView.getVisibility();
        if (visibility == View.INVISIBLE || visibility == View.VISIBLE) {
            keyboardView.setVisibility(View.GONE);
        }
    }
}