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Android如何自定义软键盘

发布时间:2021-08-23 09:13:16 来源:亿速云 阅读:366 作者:小新 栏目:开发技术

小编给大家分享一下Android如何自定义软键盘,相信大部分人都还不怎么了解,因此分享这篇文章给大家参考一下,希望大家阅读完这篇文章后大有收获,下面让我们一起去了解一下吧!

    效果图

    先放最终效果图 ???

    Android如何自定义软键盘

    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()
        }
    }

    以上是“Android如何自定义软键盘”这篇文章的所有内容,感谢各位的阅读!相信大家都有了一定的了解,希望分享的内容对大家有所帮助,如果还想学习更多知识,欢迎关注亿速云行业资讯频道!

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