安卓家庭记账本开发笔记6（补2月2日）

完成自定义软键盘的绘制和逻辑编写

在res文件夹中创建一个文件包命名为xml。在里面创建一个名为key的xml文件，在其中完成自定义软键盘的绘制

代码如下：

<?xml version="1.0" encoding="utf-8"?>
<Keyboard
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:keyHeight="50dp"
        android:keyWidth="25%p"
        android:horizontalGap="1px"
        android:verticalGap="1px"
        >
        <Row>
                    <Key android:codes="49" android:keyLabel="1"/>
                    <Key android:codes="50" android:keyLabel="2"/>
                    <Key android:codes="51" android:keyLabel="3"/>
                    <Key android:codes="-5" android:keyLabel="删除"/>
        </Row>
        <Row>
                <Key android:codes="52" android:keyLabel="4"/>
                <Key android:codes="53" android:keyLabel="5"/>
                <Key android:codes="54" android:keyLabel="6"/>
                <Key android:codes="-4" android:keyHeight="150dp" android:keyLabel="确定"/>
        </Row>
        <Row>
                <Key android:codes="55" android:keyLabel="7"/>
                <Key android:codes="56" android:keyLabel="8"/>
                <Key android:codes="57" android:keyLabel="9"/>
        </Row>
        <Row>
                <Key android:codes="-3" android:keyLabel="清零"/>
                <Key android:codes="48" android:keyLabel="0"/>
                <Key android:codes="46" android:keyLabel="."/>
        </Row>

</Keyboard>
在软件文件夹中创建一个名为utils的文件夹，在其中创建一个java类文件命名为keyboardutil文件完成软键盘的逻辑编写
代码如下：

package com.example.myapplication1.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.example.myapplication1.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);
        this.keyboardView.setEnabled(true);
        this.keyboardView.setPreviewEnabled(false);
        this.keyboardView.setOnKeyboardActionListener(listener);//设置键盘被点击了的监听
    }
    KeyboardView.OnKeyboardActionListener listener = new KeyboardView.OnKeyboardActionListener() {
        @Override
        public void onPress(int primaryCode) {
        }
        @Override
        public void onRelease(int primaryCode) {
        }
        @Override
        public void onKey(int primaryCode, int[] keyCodes) {
            Editable editable=editText.getText();
            int start=editText.getSelectionStart();
            switch (primaryCode){
                case Keyboard.KEYCODE_DELETE://删除
                    if(editable!=null&&editable.length()>0) {
                        if(start>0)
                        {
                            editable.delete(start-1, start);
                        }
                    }
                    break;
                case Keyboard.KEYCODE_CANCEL://清零
                    editable.clear();
                    break;
                case Keyboard.KEYCODE_DONE://完成
                    onEnsureListener.onEnsure();
                    break;
                default:
                    editable.insert(start,Character.toString((char)primaryCode));
                    break;

            }
        }
        @Override
        public void onText(CharSequence text) {
        }
        @Override
        public void swipeLeft() {
        }
        @Override
        public void swipeRight() {
        }
        @Override
        public void swipeDown() {
        }
        @Override
        public void swipeUp() {
        }
    };
    public void showKeyboard(){
        int visibility = keyboardView.getVisibility();
        if(visibility== View.INVISIBLE||visibility==View.GONE)
        {
            keyboardView.setVisibility(View.VISIBLE);
        }
    }
    public void hideKeyboard(){
        int visibility = keyboardView.getVisibility();
        if(visibility == View.VISIBLE||visibility==View.INVISIBLE)
        {
            keyboardView.setVisibility(View.GONE);
        }
    }
}