android自定义键盘

                                                    　android自定义键盘

首先来了解几个类

android.inputmethodservice.KeyboardView　　主要管理键盘的显示相关的特性，如键盘的整体背景颜色，每一个键的背景颜色，每一个键的自题的颜色大小等待。以及各种时间的触发和处理。

android.inputmethodservice.Keyboard　　就像他的名字，这个类描述的是一个键盘，包括了每个键和值的对应关系，以及每个键的大小和具体位置，在初始化这个类的时候，我们需要将一个键盘布局文xml件传给此类的方法，此xml文件中定义了各个键和值的对应关系，以及所有键的布局关系。

下面我们首先来定义我们Keyboard的布局文件，此文件应该放在res/xml中

character_symbols.xml（英文字母键盘）

<?xml version="1.0" encoding="UTF-8"?><Keyboard android:keyWidth="10.000002%p" android:keyHeight="50dp"    android:horizontalGap="1.0px" android:verticalGap="1.0px"    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="4445"            android:keyLabel="123#" />        <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="-4"            android:keyEdgeFlags="right" android:keyLabel="完成" />    </Row></Keyboard>

number_symbols.xml（数字键盘）

<?xml version="1.0" encoding="utf-8"?><Keyboard xmlns:android="http://schemas.android.com/apk/res/android"    android:horizontalGap="1sp"    android:keyHeight="10%p"    android:keyWidth="33.33%"    android:verticalGap="1sp">    <Row>        <Key            android:codes="49"            android:keyLabel="1" />        <Key            android:codes="50"            android:keyLabel="2" />        <Key            android:codes="51"            android:keyLabel="3" />    </Row>    <Row>        <Key            android:codes="52"            android:keyLabel="4" />        <Key            android:codes="53"            android:keyLabel="5" />        <Key            android:codes="54"            android:keyLabel="6" />    </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="4444"            android:keyLabel="abc" />        <Key            android:codes="48"            android:keyLabel="0" />        <Key            android:codes="-5"            android:keyIcon="@drawable/sym_keyboard_delete" />    </Row></Keyboard>

相关属性

android:keyWidth="10.000002%p"　表示每一个键的宽度

android:keyHeight="50dp"　　　　　表示每一个键的高度

android:horizontalGap="1.0px"表示行间距

android:verticalGap="1.0px"表示列间距

<Key>　表示一个键

<Row>　行　没一行可以有若干个<Key>

codes　表示每一个键的键　系统已经定义好了很多，我们可以直接用，当然我们也可一自定义。

keyIcon　　表示每一个键的文字

keyLabel　表示每一个键的显示的图标

keyIcon　keyLabel　两者只能选一个

接下来我们需要定义一个工具类来管理键盘的各种功能

package com.liaoli.keyboard;import android.app.Activity;import android.content.Context;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 org.w3c.dom.Text;import java.util.List;/** * Created by liaoli on 15-10-16. */public class KeyboardUtil implements KeyboardView.OnKeyboardActionListener {    private KeyboardView keyboardView;    //数字键盘    private Keyboard k_number;    //英文键盘    private Keyboard k_character;    private EditText et;    private boolean isUpperCase = false;    public KeyboardUtil(Activity activity, Context context, EditText et) {        this.k_number = new Keyboard(context, R.xml.number_symbols);        this.k_character = new Keyboard(context, R.xml.character_symbols);        this.et = et;        keyboardView = (KeyboardView) activity.findViewById(R.id.keyvoard_view);        showKeyboard(k_character);    }    /**     * 此方法主要在切换输入法时用到     *     * @param keyboard     */    private void showKeyboard(Keyboard keyboard) {        keyboardView.setKeyboard(keyboard);        keyboardView.setPreviewEnabled(false);        keyboardView.setOnKeyboardActionListener(this);        keyboardView.setEnabled(true);        keyboardView.setVisibility(View.VISIBLE);    }    @Override    public void onPress(int primaryCode) {    }    @Override    public void onRelease(int primaryCode) {    }    @Override    public void onKey(int primaryCode, int[] keyCodes) {        //在此根据每一个键的primaryCode来处理相应的逻辑，主要是处理自定义的primary处理逻辑        Editable editable = et.getText();        int start = et.getSelectionStart();        if (primaryCode == Keyboard.KEYCODE_DELETE) {            if (editable != null && editable.length() > 0) {                if (start > 0) {                    editable.delete(start - 1, start);                }            }        } else if (primaryCode == 4444) {            //数字键盘切换到英文字符键盘            showKeyboard(k_character);        } else if (primaryCode == 4445) {            //英文键盘切换到数字键盘            showKeyboard(k_number);        } else if (primaryCode == Keyboard.KEYCODE_DONE) {            hideKeyboard();        } else if (primaryCode == Keyboard.KEYCODE_SHIFT) {            //大小写切换            changKey();            showKeyboard(k_character);        } else {            //将输入的内容添加到输入框中            editable.insert(start, Character.toString((char) primaryCode));        }    }    private void changKey() {        List<Keyboard.Key> keyList = k_character.getKeys();        if (isUpperCase) {            for (int i = 0; i < keyList.size(); i++) {                Keyboard.Key key = keyList.get(i);                if (key.label != null && isLetter(key.label.toString())) {                    key.label = key.label.toString().toLowerCase();                    key.codes[0] += 32;                }            }            isUpperCase = !isUpperCase;        } else {            for (int i = 0; i < keyList.size(); i++) {                Keyboard.Key key = keyList.get(i);                if (key.label != null && isLetter(key.label.toString())) {                    key.label = key.label.toString().toUpperCase();                    key.codes[0] -= 32;                }            }            isUpperCase = !isUpperCase;        }    }    private boolean isLetter(String s) {        String letters = "abcdefghijklmnopqrstuvwxyz";        int index = letters.indexOf(s.toLowerCase());        return index > -1;    }    @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.GONE || visibility == View.INVISIBLE) {            keyboardView.setVisibility(View.VISIBLE);        }    }    public void hideKeyboard() {        keyboardView.setVisibility(View.INVISIBLE);    }}

接下来我们就可通过这个工具类来使用我们的自定义键盘了。

package com.liaoli.keyboard;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.text.InputType;import android.text.TextUtils;import android.view.MotionEvent;import android.view.View;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends AppCompatActivity implements View.OnTouchListener {    private EditText userName;    private EditText passward;    private KeyboardUtil keyboardUtil;    //    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        userName = (EditText) findViewById(R.id.user_name);        passward = (EditText) findViewById(R.id.password);        userName.setOnTouchListener(this);        passward.setOnTouchListener(this);    }    public void register(View view){        String userName = this.userName.getText().toString().trim();        String password = this.passward.getText().toString().trim();        if(TextUtils.isEmpty(userName) || TextUtils.isEmpty(password)){            Toast.makeText(this,"用户名或密码不能为空",Toast.LENGTH_SHORT).show();        }else{            Toast.makeText(this,"恭喜你！"+userName + "已注册成功！",Toast.LENGTH_SHORT).show();            if (keyboardUtil != null) {                keyboardUtil.hideKeyboard();            }        }    }    @Override    public boolean onTouch(View v, MotionEvent event) {        EditText et = null;        if(v instanceof  EditText){            et = (EditText) v;            //不让系统输入法弹出           int  inputMoudle = et.getInputType();            et.setInputType(InputType.TYPE_NULL);            keyboardUtil = new KeyboardUtil(this,this,et);            keyboardUtil.showKeyboard();            et.extendSelection(0);            et.setInputType(inputMoudle);            //必须向上传递onTouch事件，光标显示            return false;        }        return  true;    }}

activity_main.xml wenjian

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".MainActivity">    <LinearLayout        android:id="@+id/edit_layout"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:paddingBottom="@dimen/activity_vertical_margin"        android:paddingLeft="@dimen/activity_horizontal_margin"        android:paddingRight="@dimen/activity_horizontal_margin"        android:paddingTop="@dimen/activity_vertical_margin"        android:orientation="vertical">        <EditText            android:id="@+id/user_name"            android:layout_width="fill_parent"            android:layout_height="50dp"            android:hint="用户名" />        <EditText            android:id="@+id/password"            android:layout_width="fill_parent"            android:layout_height="50dp"            android:password="true"            android:hint="密码" />    </LinearLayout>    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="注册"        android:onClick="register"        android:layout_below="@+id/edit_layout"        android:layout_alignParentRight="true"        android:layout_alignParentEnd="true"        android:layout_marginRight="27dp"        android:layout_marginEnd="27dp" />    <android.inputmethodservice.KeyboardView        android:id="@+id/keyvoard_view"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:background="#ffffff"        android:keyTextColor="#FFFACD"        android:keyBackground="@drawable/key_selector"        android:layout_alignParentBottom="true"/></RelativeLayout>

效果