Android自定义软键盘的步骤记录

• • 3、处理点击事件onkey

效果图

还是咱们的老规矩，先放最终效果图 ????????????

实现自定义软键盘

需要实现一个软键盘很简单，只需要很简单的3步

1、通过xml文件，定义出来键盘结构

2、将定义好的键盘结构与keyboardview绑定起来

3、实现onkey方法，处理输入和操作事件

1、通过xml定义键盘

在res下面定义一个xml文件夹，并创建你的软键盘布局xml文件

这边需要根据自己的每一个key对应的比例计算出来大小，%p就是占整个的百分比，要注意间隔距离。

<?xml version="1.0" encoding="utf-8"?>
<keyboard xmlns:android="http://schemas.android.com/apk/res/android"
    android:horizontalgap="1%p"
    android:keywidth="10%p"
    android:keyheight="50dp"
    android:verticalgap="1%p">

    <row>
        <key
            android:codes="81"<!--最终展示内容的unicode-->
            android:horizontalgap="1%p"<!--横向间隔比率-->
            android:keywidth="8.9%p"<!--键位宽度比率-->
            android:keyedgeflags="left"<!--键盘间隔对其方式-->
            android:keylabel="q" <!--键盘上展示的文案--> />
        <key
            android:codes="87"
            android:keywidth="8.9%p"
            android:keylabel="w" />
        <key
            android:codes="69"
            android:keywidth="8.9%p"
            android:keylabel="e" />
        <key
            android:codes="82"
            android:keywidth="8.9%p"
            android:keylabel="r" />
        <key
            android:codes="84"
            android:keywidth="8.9%p"
            android:keylabel="t" />
        <key
            android:codes="89"
            android:keywidth="8.9%p"
            android:keylabel="y" />
        <key
            android:codes="85"
            android:keywidth="8.9%p"
            android:keylabel="u" />
        <key
            android:codes="73"
            android:keywidth="8.9%p"
            android:keylabel="i" />
        <key
            android:codes="79"
            android:keywidth="8.9%p"
            android:keylabel="o" />
        <key
            android:codes="80"
            android:keywidth="8.9%p"
            android:keyedgeflags="right"
            android:keylabel="p" />
    </row>

    <row>
        <key
            android:codes="65"
            android:horizontalgap="5.5%p"
            android:keywidth="9%p"
            android:keyedgeflags="left"
            android:keylabel="a" />
        <key
            android:codes="83"
            android:keywidth="9%p"
            android:keylabel="s" />
        <key
            android:codes="68"
            android:keywidth="9%p"
            android:keylabel="d" />
        <key
            android:codes="70"
            android:keywidth="9%p"
            android:keylabel="f" />
        <key
            android:codes="71"
            android:keywidth="9%p"
            android:keylabel="g" />
        <key
            android:codes="72"
            android:keywidth="9%p"
            android:keylabel="h" />
        <key
            android:codes="74"
            android:keywidth="9%p"
            android:keylabel="j" />
        <key
            android:codes="75"
            android:keywidth="9%p"
            android:keylabel="k" />
        <key
            android:codes="76"
            android:keywidth="9%p"
            android:keyedgeflags="left"
            android:keylabel="l" />
    </row>

    <row>
        <key
            android:codes="-1005"
            android:keywidth="13.5%p"
            android:keyedgeflags="left"
            android:keylabel="中" />
        <key
            android:codes="90"
            android:keywidth="9%p"
            android:keylabel="z" />
        <key
            android:codes="88"
            android:keywidth="9%p"
            android:keylabel="x" />
        <key
            android:codes="67"
            android:keywidth="9%p"
            android:keylabel="c" />
        <key
            android:codes="86"
            android:keywidth="9%p"
            android:keylabel="v" />
        <key
            android:codes="66"
            android:keywidth="9%p"
            android:keylabel="b" />
        <key
            android:codes="78"
            android:keywidth="9%p"
            android:keylabel="n" />
        <key
            android:codes="77"
            android:keywidth="9%p"
            android:keylabel="m" />
        <key
            android:codes="-5"
            android:isrepeatable="true"
            android:keywidth="13.5%p" />
    </row>
    <row>
        <key
            android:codes="-1004"
            android:keywidth="24%p"
            android:keyedgeflags="left"
            android:keylabel="123" />
        <key
            android:codes="32"
            android:keywidth="48%p"
            android:keylabel="space" />
        <key
            android:codes="-1003"
            android:keywidth="24%p"
            android:keyedgeflags="right"
            android:keylabel="确定" />
    </row>
</keyboard>

2、将xml文件与keyboardview绑定起来

创建出来的keyboard文件是要与keyboard类结合起来使用的。

wordkeyboard = new keyboard(context, r.xml.stock_word_keyboard);

实现自己的keyboardview，继承自keyboardview。

public class mykeyboardview extends keyboardview {
...
init{
  wordkeyboard = new keyboard(context, r.xml.stock_word_keyboard);
  //将你的keyboard与keyboardview绑定起来
  this.setkeyboard(wordkeyboard);
}

我们真实需要添加到布局中的view实际上就是自定义的mykeyboardview ，它的使用和其他自定义view没有任何区别。

3、处理点击事件onkey

如果你完成了上面两步，并将view添加到布局中，你会发现已经可以展示出来了。但是点击并没有任何效果。
如果想要出效果，就需要实现onkey进行处理。

keyboardview.this.setonkeyboardactionlistener(new onkeyboardactionlistener() {

    @override
    public void onkey(int primarycode, int[] keycodes) {
        try {
            editable editable = edittext.gettext();
            int start = edittext.getselectionstart();
            int end = edittext.getselectionend();
            string code = string.valueof(primarycode);
            switch (code) {
            		//切换到数字键盘
                case keyboardkeymap.tool_switch_to_num:
                    onkeyboardcallback.switchtonumberkeyboard();
                    break;
                    //切换到系统键盘
                case keyboardkeymap.tool_switch_to_word:
                    onkeyboardcallback.switchtosystemkeyboard();
                    break;
                    //隐藏键盘
                case keyboardkeymap.tool_hide:
                    onkeyboardcallback.onhidestockkeyboard();
                    break;
                    //删除
                case keyboardkeymap.tool_del:
                    if (editable != null && editable.length() > 0) {
                        if (start == end) {
                            editable.delete(start - 1, start);
                        } else {
                            editable.delete(start, end);
                        }
                    }
                    break;
                    //清空输入
                case keyboardkeymap.tool_clear:
                    if (editable != null) {
                        editable.clear();
                    }
                    break;
                    //确认按钮
                case keyboardkeymap.tool_confirm:
                    onkeyboardcallback.onconfirmstockkeyboard();
                    break;
                default:
                   //正常输入
                    if (editable != null) {
                        if (keyboardkeymap.isstockprefix(code)) {
	                        //这里处理更加特殊的输入定义，
	                        //比如你需要输入城市简称等（车牌自定义键盘需要）
                            string resultcode = keyboardkeymap.findinputbykey(code);
                            editable.replace(start, end, resultcode);
                        } else {
                            //这里如果是正常的键位（排除确认、清空、切换等功能键位），
                            //则将键位上的unicode转换为正常的数字，比如定义键盘p对应的
                            //unicode是80，因为xml定义键位的时候为了方便匹配，所以值
                            //是使用的unicode，这边则会将80转换为真正要输入的p字母。
                            string resultcode = character.tostring((char) primarycode);
                            editable.replace(start, end, resultcode);
                        }
                    }
                    break;
            }
        } catch (exception e) {
            e.printstacktrace();
        }
    }
}

到这里，基本的自定义键盘定义操作就完成了。当然如果你是工作使用，并没有结束，因为一般情况下自定义键盘需要和系统键盘并存，因此你还需要处理键盘切换的闪动问题。对于键盘切换控制，我这里就不过多介绍了，可以自行查阅软键盘+表情切换，处理方案目前已经很成熟了。原理是一样的。

附赠一些实用的效果处理

1、点击空白处，关闭软键盘，如果有内容，出发内容点击，并关系软键盘，如果是滑动，则只关闭软键盘
效果实现太简单了，这里不做过多说明，理解事件分发自然懂。

class autohidekeyboardcstlayout @jvmoverloads constructor(
    context: context, attrs: attributeset? = null
) : constraintlayout(context, attrs) {

    var keyboardhidelistener: (() -> unit)? = null

    override fun onintercepttouchevent(ev: motionevent?): boolean {
        if (ev?.action == motionevent.action_down) {
            keyboardhidelistener?.invoke()
        }
        return super.onintercepttouchevent(ev)
    }
}

关闭操作只需要在回调方法执行即可。

contenthidekeyboardcstlayout.keyboardhidelistener = {
    hidepanelandkeyboard()
}

2、切换软键盘panel，很简单的实现

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="40dp"
    android:background="@android:color/white"
    android:elevation="0.5dp">

    <androidx.appcompat.widget.appcompattextview
        android:id="@+id/tvstocknumkeyboard"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centervertical="true"
        android:layout_marginstart="10dp"
        android:button="@null"
        android:padding="6dp"
        android:text="123"
        android:textcolor="@drawable/stock_switch_label_color"
        android:textsize="16dp"
        android:textstyle="bold" />

    <androidx.appcompat.widget.appcompattextview
        android:id="@+id/tvstockwordkeyboard"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centervertical="true"
        android:layout_marginstart="18dp"
        android:layout_toendof="@+id/tvstocknumkeyboard"
        android:button="@null"
        android:padding="6dp"
        android:text="abc"
        android:textcolor="@drawable/stock_switch_label_color"
        android:textsize="16dp"
        android:textstyle="bold" />

    <androidx.appcompat.widget.appcompattextview
        android:id="@+id/tvsystemkeyboard"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centervertical="true"
        android:layout_marginstart="18dp"
        android:layout_toendof="@+id/tvstockwordkeyboard"
        android:button="@null"
        android:padding="6dp"
        android:text="中文"
        android:textcolor="@drawable/stock_switch_label_color"
        android:textsize="16dp"
        android:textstyle="bold" />

    <framelayout
        android:id="@+id/keyboarddone"
        android:layout_width="60sp"
        android:layout_height="match_parent"
        android:layout_alignparentend="true"
        android:layout_centervertical="true">

        <imageview
            android:layout_width="16dp"
            android:layout_height="16dp"
            android:layout_gravity="center"
            android:contentdescription="@null"
            android:scaletype="centerinside"
            android:src="@drawable/keyboard_done_"
            android:textcolor="@color/white"
            android:textsize="16sp" />
    </framelayout>

    <view
        android:layout_width="match_parent"
        android:layout_height="0.5dp"
        android:background="#eeeeee" />
</relativelayout>

颜色切换selector

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:color="#f14400" android:state_selected="true" />
    <item android:color="#334455" android:state_selected="false" />
</selector>

class keyboardswitcher @jvmoverloads constructor(
    context: context, attrs: attributeset? = null
) : relativelayout(context, attrs) {

    private var mviewbinding: rtckeyboardswitcherbinding? = null
    private var mstockkeyboardview: stockkeyboardview? = null

    init {
        mviewbinding = rtckeyboardswitcherbinding.inflate(layoutinflater.from(context), this, true)
    }

    fun pressnumberkeyboard() {
        mviewbinding?.tvstocknumkeyboard?.performclick()
    }

    fun presswordkeyboard() {
        mviewbinding?.tvstockwordkeyboard?.performclick()
    }

    fun presssystemkeyboard() {
        mviewbinding?.tvsystemkeyboard?.performclick()
    }

    fun switchkeyboard(
        _switchkeyboard: (issystemkeyboard: boolean) -> unit,
        _keyboarddone: () -> unit
    ) {
        mviewbinding?.apply {
            tvstocknumkeyboard.setonclicklistener {
                resetselectedstate()
                _switchkeyboard.invoke(false)
                mstockkeyboardview?.shownumberkeyboard()
                it.isselected = true
            }
            tvstockwordkeyboard.setonclicklistener {
                resetselectedstate()
                _switchkeyboard.invoke(false)
                mstockkeyboardview?.showwordkeyboard()
                it.isselected = true
            }
            tvsystemkeyboard.setonclicklistener {
                resetselectedstate()
                _switchkeyboard.invoke(true)
                it.isselected = true
            }
            keyboarddone.setonclicklistener {
                _keyboarddone.invoke()
            }
        }
    }

    fun setdefaultkeyboard(index: int) {
        resetselectedstate()
        mviewbinding?.apply {
            when (index) {
                0 -> {
                    tvstocknumkeyboard.isselected = true
                }
                1 -> {
                    tvstockwordkeyboard.isselected = true
                }
                2 -> {
                    tvsystemkeyboard.isselected = true
                }
            }
        }
    }

    private fun resetselectedstate() {
        mviewbinding?.apply {
            tvstocknumkeyboard.isselected = false
            tvstockwordkeyboard.isselected = false
            tvsystemkeyboard.isselected = false
        }
    }

    override fun ontouchevent(event: motionevent?): boolean {
        if (event?.action == motionevent.action_down) {
            performclick()
        }
        return true
    }

    override fun performclick(): boolean {
        return super.performclick()
    }

    fun attach(stockkeyboardview: stockkeyboardview) {
        this.mstockkeyboardview = stockkeyboardview
    }

    fun shownumberkeyboard() {
        this.mstockkeyboardview?.shownumberkeyboard()
    }
}

总结

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