Android自定义输入法软键盘

本文实例为大家分享了Android自定义输入法软键盘的具体代码，供大家参考，具体内容如下

1 功能描述

• 触屏设备主界面中有一个文本编辑框，底部区域固定显示一个数字键盘，键盘中除数字键外，还带有*和＃键功能；

• 提供一个自定义的数字输入法，生成apk安装包文件，嵌入到img镜像文件中去。

2 设计实现

1、创建类名为SimpleIME，继承父类InputMethodService，实现KeyboardView.OnKeyboardActionListener接口。
2、编写键盘对象加载的.xml文件。
3、重写onCreateInputView()方法，初始化键盘视图和创建键盘对象，使用键盘视图对象设置键盘的监听。
4、重写onKey、onPress、onRelease、onText、swipeDown、swipeLeft、swipeRight和swipeUp等方法，在onKey方法中可处理对键盘的操作，在这个方法里通过传入的primaryCode进行相应的操作。其他方法没有具体的实现。
5、配置清单文件的声明service，还向系统申请了IME的BIND_INPUT_METHOD权限，并且给IME添加了一个名称为android.view.InputMethod的过滤器，用来存放意图的属性。

3 贴出代码

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: 自定义输入法
* @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;
/**
* 大小写转换的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:
 // 大小写切换
 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);
}
}

/**
* 播放按键音
*
* @param keyCode 键码
*/
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>

4 Demo截图

来源：https://blog.csdn.net/discode/article/details/115048712