Android自定義輸入法軟鍵盤

更新時(shí)間：2021年03月22日 10:59:47 作者：虹貓來(lái)碼字

這篇文章主要為大家詳細(xì)介紹了Android自定義輸入法軟鍵盤，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

本文實(shí)例為大家分享了Android自定義輸入法軟鍵盤的具體代碼，供大家參考，具體內(nèi)容如下

1 功能描述

觸屏設(shè)備主界面中有一個(gè)文本編輯框，底部區(qū)域固定顯示一個(gè)數(shù)字鍵盤，鍵盤中除數(shù)字鍵外，還帶有*和＃鍵功能；
提供一個(gè)自定義的數(shù)字輸入法，生成apk安裝包文件，嵌入到img鏡像文件中去。

2 設(shè)計(jì)實(shí)現(xiàn)

1、創(chuàng)建類名為SimpleIME，繼承父類InputMethodService，實(shí)現(xiàn)KeyboardView.OnKeyboardActionListener接口。
2、編寫鍵盤對(duì)象加載的.xml文件。
3、重寫onCreateInputView()方法，初始化鍵盤視圖和創(chuàng)建鍵盤對(duì)象，使用鍵盤視圖對(duì)象設(shè)置鍵盤的監(jiān)聽(tīng)。
4、重寫onKey、onPress、onRelease、onText、swipeDown、swipeLeft、swipeRight和swipeUp等方法，在onKey方法中可處理對(duì)鍵盤的操作，在這個(gè)方法里通過(guò)傳入的primaryCode進(jìn)行相應(yīng)的操作。其他方法沒(méi)有具體的實(shí)現(xiàn)。
5、配置清單文件的聲明service，還向系統(tǒng)申請(qǐng)了IME的BIND_INPUT_METHOD權(quán)限，并且給IME添加了一個(gè)名稱為android.view.InputMethod的過(guò)濾器，用來(lái)存放意圖的屬性。

3 貼出代碼

1、SimpleIME.java

import android.inputmethodservice.InputMethodService;
import android.inputmethodservice.Keyboard;
import android.inputmethodservice.KeyboardView;
import android.media.AudioManager;
import android.view.KeyEvent;
import android.view.View;
import android.view.inputmethod.InputConnection;

/**
 * @description: 自定義輸入法
 * @version: v1.0
 * @author: yeyl
 * @date: 2018/6/26 14:57
 * @history:
 */
public class SimpleIME extends InputMethodService
 implements KeyboardView.OnKeyboardActionListener {

 private KeyboardView mKeyboardView;
 private Keyboard mKeyboard;
 /**
 * 大小寫轉(zhuǎn)換的flag
 */
 private boolean mCaps = false;

 @Override
 public View onCreateInputView() {
 mKeyboardView = (KeyboardView) getLayoutInflater().inflate(R.layout.layout_keyboard, null);
 mKeyboard = new Keyboard(this, R.xml.keyboard_number);
 mKeyboardView.setKeyboard(mKeyboard);
 mKeyboardView.setOnKeyboardActionListener(this);
 return mKeyboardView;
 }

 @Override
 public boolean onKeyDown(int keyCode, KeyEvent event) {
 return super.onKeyDown(keyCode, event);
 }

 @Override
 public void onKey(int primaryCode, int[] keyCodes) {
 InputConnection ic = getCurrentInputConnection();
 playClick(primaryCode);
 switch (primaryCode) {
  case Keyboard.KEYCODE_DELETE:
  // 回退
  ic.deleteSurroundingText(1, 0);
  break;
  case Keyboard.KEYCODE_SHIFT:
  // 大小寫切換
  mCaps = !mCaps;
  mKeyboard.setShifted(mCaps);
  mKeyboardView.invalidateAllKeys();
  break;
  case Keyboard.KEYCODE_DONE:
  // 完成
  ic.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER));
  break;
  case Keyboard.KEYCODE_CANCEL:
  // 取消
  ic.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_BACK));
  ic.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_BACK));
  break;
  default:
  char code = (char) primaryCode;
  if (Character.isLetter(code) && mCaps) {
   code = Character.toUpperCase(code);
  }
  ic.commitText(String.valueOf(code), 1);
 }
 }

 /**
 * 播放按鍵音
 *
 * @param keyCode 鍵碼
 */
 private void playClick(int keyCode) {
 AudioManager am = (AudioManager) getSystemService(AUDIO_SERVICE);
 switch (keyCode) {
  case 32:
  am.playSoundEffect(AudioManager.FX_KEYPRESS_SPACEBAR);
  break;
  case Keyboard.KEYCODE_DONE:
  case 10:
  am.playSoundEffect(AudioManager.FX_KEYPRESS_RETURN);
  break;
  case Keyboard.KEYCODE_DELETE:
  am.playSoundEffect(AudioManager.FX_KEYPRESS_DELETE);
  break;
  default:
  am.playSoundEffect(AudioManager.FX_KEYPRESS_STANDARD);
 }
 }

 @Override
 public void onPress(int primaryCode) {
 }

 @Override
 public void onRelease(int primaryCode) {
 }

 @Override
 public void onText(CharSequence text) {
 }

 @Override
 public void swipeDown() {
 }

 @Override
 public void swipeLeft() {
 }

 @Override
 public void swipeRight() {
 }

 @Override
 public void swipeUp() {
 }
}

2、layout_keyboard.xml

<?xml version="1.0" encoding="UTF-8"?>
<android.inputmethodservice.KeyboardView xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/keyboard"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_alignParentBottom="true"
 android:keyPreviewLayout="@layout/layout_preview" />

3、layout_preview.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:background="#FFFF00"
 android:gravity="center"
 android:textSize="30sp"
 android:textStyle="bold" />

4、keyboard_number.xml

<?xml version="1.0" encoding="utf-8"?>
<Keyboard xmlns:android="http://schemas.android.com/apk/res/android"
 android:horizontalGap="0px"
 android:keyWidth="33.3%p"
 android:keyHeight="9%p"
 android:verticalGap="0px">
 <Row>
 <Key
  android:codes="49"
  android:keyEdgeFlags="left"
  android:keyLabel="1" />
 <Key
  android:codes="50"
  android:keyLabel="2" />
 <Key
  android:codes="51"
  android:keyEdgeFlags="right"
  android:keyLabel="3" />
 </Row>
 <Row>
 <Key
  android:codes="52"
  android:keyEdgeFlags="left"
  android:keyLabel="4" />
 <Key
  android:codes="53"
  android:keyLabel="5" />
 <Key
  android:codes="54"
  android:keyEdgeFlags="right"
  android:keyLabel="6" />
 </Row>
 <Row>
 <Key
  android:codes="55"
  android:keyEdgeFlags="left"
  android:keyLabel="7" />
 <Key
  android:codes="56"
  android:keyLabel="8" />
 <Key
  android:codes="57"
  android:keyEdgeFlags="right"
  android:keyLabel="9" />
 </Row>
 <Row android:rowEdgeFlags="bottom">
 <Key
  android:codes="-3"
  android:keyEdgeFlags="left"
  android:keyLabel="*" />
 <Key
  android:codes="48"
  android:keyLabel="0" />
 <Key
  android:codes="-4"
  android:isRepeatable="true"
  android:keyEdgeFlags="right"
  android:keyLabel="完成" />
 </Row>
</Keyboard>

5、AndroidManifest.xml

<service
  android:name=".SimpleIME"
  android:label="@string/simple_ime"
  android:permission="android.permission.BIND_INPUT_METHOD">
  <meta-data
  android:name="android.view.im"
  android:resource="@xml/method" />
  <intent-filter>
  <action android:name="android.view.InputMethod" />
  </intent-filter>
</service>

6、method.xml

<?xml version="1.0" encoding="utf-8"?>
<input-method xmlns:android="http://schemas.android.com/apk/res/android">
 <subtype
 android:imeSubtypeLocale="en_US"
 android:imeSubtypeMode="keyboard"
 android:label="@string/subtype_en_US" />
</input-method>