Android自定义软键盘的设计与实现代码

偶然间发现了android.inputmethodservice.keyboard类，即android可以自定义键盘类，做了一个简单例子供大家参考。

效果如下：

先看界面布局文件

 <?xml version="1.0" encoding="utf-8"?> 
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent" 
  android:orientation="vertical" > 
  
  <edittext 
    android:id="@+id/edit" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" /> 
  
  <edittext 
    android:id="@+id/edit1" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:password="true" /> 
  
  <relativelayout 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" > 
  
    <android.inputmethodservice.keyboardview 
      android:id="@+id/keyboard_view" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:layout_alignparentbottom="true" 
      android:focusable="true" 
      android:focusableintouchmode="true" 
      android:background="@color/lightblack" 
      android:keybackground="@drawable/btn_keyboard_key" 
      android:keytextcolor="@color/white" 
      android:visibility="gone" /> 
  </relativelayout> 
  
</linearlayout> 

通过布局文件可以看出界面上有两个输入框，其中一个是密码输入框，界面上还有一个隐藏的键盘控件。

在res下新建xml文件夹，在xml文件夹中新建qwerty.xml和symbols.xml文件. qwerty.xml 是字母键盘布局，symbols.xml 是数字键盘布局，内如如下:

qwerty.xml内容

<?xml version="1.0" encoding="utf-8"?> 
<keyboard android:keywidth="10.000002%p" android:keyheight="@dimen/key_height" 
    android:horizontalgap="0.0px" android:verticalgap="0.0px" 
    xmlns:android="http://schemas.android.com/apk/res/android"> 
    <row> 
        <key android:codes="113" android:keyedgeflags="left" 
            android:keylabel="q" /> 
        <key android:codes="119" android:keylabel="w" /> 
        <key android:codes="101" android:keylabel="e" /> 
        <key android:codes="114" android:keylabel="r" /> 
        <key android:codes="116" android:keylabel="t" /> 
        <key android:codes="121" android:keylabel="y" /> 
        <key android:codes="117" android:keylabel="u" /> 
        <key android:codes="105" android:keylabel="i" /> 
        <key android:codes="111" android:keylabel="o" /> 
        <key android:codes="112" android:keyedgeflags="right" 
            android:keylabel="p" /> 
    </row> 
    <row> 
        <key android:horizontalgap="4.999995%p" android:codes="97" 
            android:keyedgeflags="left" android:keylabel="a" /> 
        <key android:codes="115" android:keylabel="s" /> 
        <key android:codes="100" android:keylabel="d" /> 
        <key android:codes="102" android:keylabel="f" /> 
        <key android:codes="103" android:keylabel="g" /> 
        <key android:codes="104" android:keylabel="h" /> 
        <key android:codes="106" android:keylabel="j" /> 
        <key android:codes="107" android:keylabel="k" /> 
        <key android:codes="108" android:keyedgeflags="right" 
            android:keylabel="l" /> 
    </row> 
    <row> 
        <key android:keywidth="14.999998%p" android:codes="-1" 
            android:keyedgeflags="left" android:ismodifier="true" 
            android:issticky="true" android:keyicon="@drawable/sym_keyboard_shift" /> 
        <key android:codes="122" android:keylabel="z" /> 
        <key android:codes="120" android:keylabel="x" /> 
        <key android:codes="99" android:keylabel="c" /> 
        <key android:codes="118" android:keylabel="v" /> 
        <key android:codes="98" android:keylabel="b" /> 
        <key android:codes="110" android:keylabel="n" /> 
        <key android:codes="109" android:keylabel="m" /> 
        <key android:keywidth="14.999998%p" android:codes="-5" 
            android:keyedgeflags="right" android:isrepeatable="true" 
            android:keyicon="@drawable/sym_keyboard_delete" /> 
    </row> 
    <row android:rowedgeflags="bottom"> 
        <key android:keywidth="20.000004%p" android:codes="-2" 
            android:keylabel="12#" /> 
        <key android:keywidth="14.999998%p" android:codes="44" 
            android:keylabel="," /> 
        <key android:keywidth="29.999996%p" android:codes="32" 
            android:isrepeatable="true" android:keyicon="@drawable/sym_keyboard_space" /> 
        <key android:keywidth="14.999998%p" android:codes="46" 
            android:keylabel="." /> 
        <key android:keywidth="20.000004%p" android:codes="-3" 
            android:keyedgeflags="right" android:keylabel="完成" /> 
    </row> 
</keyboard> 

symbols.xml 内容

<?xml version="1.0" encoding="utf-8"?> 
<keyboard xmlns:android="http://schemas.android.com/apk/res/android" 
    android:keywidth="25%p" android:horizontalgap="0px" 
    android:verticalgap="0px" android:keyheight="@dimen/key_height"> 
    <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="57419" android:keyedgeflags="right" 
            android:keyicon="@drawable/sym_keyboard_left" /> 
    </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="57421" android:keyedgeflags="right" 
            android:keyicon="@drawable/sym_keyboard_right" /> 
    </row> 
    <row> 
        <key android:codes="55" android:keylabel="7" /> 
        <key android:codes="56" android:keylabel="8" /> 
        <key android:codes="57" android:keylabel="9" /> 
        <key android:codes="-3" android:keyheight="100dip" 
            android:keyedgeflags="right" android:isrepeatable="true" 
            android:keylabel="完成" /> 
    </row> 
    <row> 
        <key android:codes="-2" android:keylabel="abc" /> 
        <key android:codes="48" android:keylabel="0" /> 
        <key android:codes="-5" android:keyicon="@drawable/sym_keyboard_delete" /> 
    </row> 
</keyboard> 

keydemoactivity.java

package cn.key; 
  
import android.app.activity; 
import android.content.context; 
import android.os.bundle; 
import android.text.inputtype; 
import android.view.motionevent; 
import android.view.view; 
import android.view.view.ontouchlistener; 
import android.widget.edittext; 
  
public class keydemoactivity extends activity { 
    private context ctx; 
    private activity act; 
    private edittext edit; 
    private edittext edit1; 
  
    @override 
    public void oncreate(bundle savedinstancestate) { 
        super.oncreate(savedinstancestate); 
        setcontentview(r.layout.main); 
        ctx = this; 
        act = this; 
  
        edit = (edittext) this.findviewbyid(r.id.edit); 
        edit.setinputtype(inputtype.type_null); 
  
        edit1 = (edittext) this.findviewbyid(r.id.edit1); 
  
        edit.setontouchlistener(new ontouchlistener() { 
            @override 
            public boolean ontouch(view v, motionevent event) { 
                new keyboardutil(act, ctx, edit).showkeyboard(); 
                return false; 
            } 
        }); 
  
        edit1.setontouchlistener(new ontouchlistener() { 
            @override 
            public boolean ontouch(view v, motionevent event) { 
                int inputback = edit1.getinputtype(); 
                edit1.setinputtype(inputtype.type_null); 
                new keyboardutil(act, ctx, edit1).showkeyboard(); 
                edit1.setinputtype(inputback); 
                return false; 
            } 
        }); 
  
    } 
} 

keyboardutil.java

package cn.key; 
  
import java.util.list; 
  
import android.app.activity; 
import android.content.context; 
import android.inputmethodservice.keyboard; 
import android.inputmethodservice.keyboardview; 
import android.inputmethodservice.keyboard.key; 
import android.inputmethodservice.keyboardview.onkeyboardactionlistener; 
import android.text.editable; 
import android.view.view; 
import android.widget.edittext; 
  
public class keyboardutil { 
    private context ctx; 
    private activity act; 
    private keyboardview keyboardview; 
    private keyboard k1;// 字母键盘 
    private keyboard k2;// 数字键盘 
    public boolean isnun = false;// 是否数据键盘 
    public boolean isupper = false;// 是否大写 
  
    private edittext ed; 
  
    public keyboardutil(activity act, context ctx, edittext edit) { 
        this.act = act; 
        this.ctx = ctx; 
        this.ed = edit; 
        k1 = new keyboard(ctx, r.xml.qwerty); 
        k2 = new keyboard(ctx, r.xml.symbols); 
        keyboardview = (keyboardview) act.findviewbyid(r.id.keyboard_view); 
        keyboardview.setkeyboard(k1); 
        keyboardview.setenabled(true); 
        keyboardview.setpreviewenabled(true); 
        keyboardview.setonkeyboardactionlistener(listener); 
    } 
  
    private onkeyboardactionlistener listener = new onkeyboardactionlistener() { 
        @override 
        public void swipeup() { 
        } 
  
        @override 
        public void swiperight() { 
        } 
  
        @override 
        public void swipeleft() { 
        } 
  
        @override 
        public void swipedown() { 
        } 
  
        @override 
        public void ontext(charsequence text) { 
        } 
  
        @override 
        public void onrelease(int primarycode) { 
        } 
  
        @override 
        public void onpress(int primarycode) { 
        } 
  
        @override 
        public void onkey(int primarycode, int[] keycodes) { 
            editable editable = ed.gettext(); 
            int start = ed.getselectionstart(); 
            if (primarycode == keyboard.keycode_cancel) {// 完成 
                hidekeyboard(); 
            } else if (primarycode == keyboard.keycode_delete) {// 回退 
                if (editable != null && editable.length() > 0) { 
                    if (start > 0) { 
                        editable.delete(start - 1, start); 
                    } 
                } 
            } else if (primarycode == keyboard.keycode_shift) {// 大小写切换 
                changekey(); 
                keyboardview.setkeyboard(k1); 
  
            } else if (primarycode == keyboard.keycode_mode_change) {// 数字键盘切换 
                if (isnun) { 
                    isnun = false; 
                    keyboardview.setkeyboard(k1); 
                } else { 
                    isnun = true; 
                    keyboardview.setkeyboard(k2); 
                } 
            } else if (primarycode == 57419) { // go left 
                if (start > 0) { 
                    ed.setselection(start - 1); 
                } 
            } else if (primarycode == 57421) { // go right 
                if (start < ed.length()) { 
                    ed.setselection(start + 1); 
                } 
            } else { 
                editable.insert(start, character.tostring((char) primarycode)); 
            } 
        } 
    }; 
      
    /** 
     * 键盘大小写切换 
     */ 
    private void changekey() { 
        list<key> keylist = k1.getkeys(); 
        if (isupper) {//大写切换小写 
            isupper = false; 
            for(key key:keylist){ 
                if (key.label!=null && isword(key.label.tostring())) { 
                    key.label = key.label.tostring().tolowercase(); 
                    key.codes[0] = key.codes[0]+32; 
                } 
            } 
        } else {//小写切换大写 
            isupper = true; 
            for(key key:keylist){ 
                if (key.label!=null && isword(key.label.tostring())) { 
                    key.label = key.label.tostring().touppercase(); 
                    key.codes[0] = key.codes[0]-32; 
                } 
            } 
        } 
    } 
  
  public void showkeyboard() { 
    int visibility = keyboardview.getvisibility(); 
    if (visibility == view.gone || visibility == view.invisible) { 
      keyboardview.setvisibility(view.visible); 
    } 
  } 
    
  public void hidekeyboard() { 
    int visibility = keyboardview.getvisibility(); 
    if (visibility == view.visible) { 
      keyboardview.setvisibility(view.invisible); 
    } 
  } 
    
  private boolean isword(string str){ 
      string wordstr = "abcdefghijklmnopqrstuvwxyz"; 
      if (wordstr.indexof(str.tolowercase())>-1) { 
            return true; 
        } 
      return false; 
  } 
  
} 

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。