Android 记账APP中写的一个自定义软键盘

概述1.在你要写键盘的XML文件中给自定义键盘占个地<!--自定义键盘--><android.inputmethodservice.KeyboardViewandroid:id="@+id/frag_record_keyboard"android:layout_width="match_parent"android:layout_height="wrap_content

1.在你要写键盘的XML文件中给自定义键盘占个地

    <!--自定义键盘-->    <androID.inputmethodservice.KeyboardVIEw        androID:ID="@+ID/frag_record_keyboard"        androID:layout_wIDth="match_parent"        androID:layout_height="wrap_content"        androID:keyBackground="@color/grey_f3f3f3"        androID:keyTextcolor="@color/black"        androID:focusable="true"        androID:focusableIntouchMode="true"        androID:layout_alignParentBottom="true"        androID:shadowcolor="@color/white"        androID:shadowRadius="0.0"/>

KeyBoard还有许多属性，需要添加的可以自行进行研究

2.在res文件中新建一个XML文件，写一个key.xml,就是你自定义键盘的布局

<?xml version="1.0" enCoding="utf-8"?><!--KeyHeight 表示每一个按键的高度   KeyWIDth:每一个按键2宽度5%--><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>

Row 表示一行，每一行中有三个key，表示一行中有三个按键。
里面的codes值是对应的ASCLL码值，即1对应的ASCLL码值为49.
对于我们常用的删除，清空这些按钮，在KeyBoard中也会有固定的codes,当然若是不知道也可以自己设置即可。

3.在Java文件中新建一个Utils包，里面写KeyBoardUtils.java，编写自定义键盘的逻辑属性

package com.example.bookkeePing.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.bookkeePing.R;public class KeyBoardUtils {    private KeyboardVIEw keyboardVIEw;    private EditText editText;    private final Keyboard k1;   //自定义键盘    public interface OnEnsureListener{        public voID onEnsure();    }    OnEnsureListener onEnsureListener;    public OnEnsureListener getonEnsureListener() {        return 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d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(true);       this.keyboardVIEw.setonKeyboardActionListener(Listener);   //设置键盘按钮被点击了的监听    }    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.getSelectionEnd();          switch(primaryCode){              case Keyboard.KEYCODE_DELETE:  //点击了删除                  if(editable!=null&&editable.length()>0){                      if(start>0){                          editable.delete(start-1,start);                      }                  }                  break;              case Keyboard.KEYCODE_CANCEL:    //点击了清零                  editable.clear();                  break;              case Keyboard.KEYCODE_DONE:     //点击了完成                  onEnsureListener.onEnsure();  //通过接口回调的方法，当点击确定，可以调用这个方法                  break;              default:       //其他数字直接插入                  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() {        }    };    //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    public voID hIDeKeyboard(){        int visibility=keyboardVIEw.getVisibility();       if(visibility==VIEw.VISIBLE||visibility==VIEw.INVISIBLE){           keyboardVIEw.setVisibility(VIEw.GONE);       }    }}

4.在要显示自定义键盘的界面（Java文件）中初始化界面，显示自定义键盘

package com.example.bookkeePing.frag_record;/** * 记录页面中的支出模块 */import androID.inputmethodservice.KeyboardVIEw;import androID.os.Bundle;import androIDx.fragment.app.Fragment;import androID.vIEw.LayoutInflater;import androID.vIEw.VIEw;import androID.vIEw.VIEwGroup;import androID.Widget.EditText;import androID.Widget.GrIDVIEw;import androID.Widget.ImageVIEw;import androID.Widget.TextVIEw;import com.example.bookkeePing.R;import com.example.bookkeePing.utils.KeyBoardUtils;public class OutcomeFragment extends Fragment {    KeyboardVIEw keyboardVIEw;    EditText moneyEt;    ImageVIEw typeIv;    TextVIEw typeTv,beizhuTv,timeTv;    GrIDVIEw typeGv;    @OverrIDe    public VIEw onCreateVIEw(LayoutInflater inflater, VIEwGroup container,                             Bundle savedInstanceState) {        // Inflate the layout for this fragment        VIEw vIEw= inflater.inflate(R.layout.fragment_outcome, container, false);        initVIEw(vIEw);        return vIEw;    }    private voID initVIEw(VIEw vIEw) {        keyboardVIEw=vIEw.findVIEwByID(R.ID.frag_record_keyboard);        moneyEt=vIEw.findVIEwByID(R.ID.frag_record_et_money);        typeIv=vIEw.findVIEwByID(R.ID.frag_record_iv);        beizhuTv=vIEw.findVIEwByID(R.ID.frag_record_tv_beizhu);        timeTv=vIEw.findVIEwByID(R.ID.frag_record_tv_time);        typeTv=vIEw.findVIEwByID(R.ID.frag_record_tv_type);        typeGv=vIEw.findVIEwByID(R.ID.frag_record_gv);        //让自定义软键盘显示出来        KeyBoardUtils boardUtils=new KeyBoardUtils(keyboardVIEw,moneyEt);        boardUtils.showKeyboard();        //设置接口，监听确定按钮被点击了        boardUtils.setonEnsureListener(new KeyBoardUtils.OnEnsureListener() {            @OverrIDe            public voID onEnsure() {                //点击了确定按钮                //获取记录的信息，保存在数据库中                //返回上一级页面            }        });    }}

至此，自定义键盘就可以显示出来了，我做的自定义键盘界面显示如下图：

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