# PlateNumberKeyBoard
**Repository Path**: liwqlzz/PlateNumberKeyBoard
## Basic Information
- **Project Name**: PlateNumberKeyBoard
- **Description**: 自定义输入车牌号
- **Primary Language**: Java
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No
## Statistics
- **Stars**: 0
- **Forks**: 1
- **Created**: 2020-09-25
- **Last Updated**: 2025-06-12
## Categories & Tags
**Categories**: Uncategorized
**Tags**: None
## README
# PlateNumberKeyBoard
Android 自定义车牌键盘
> 最近在做物流的项目，需要输入车牌号，传统的输入体验并不好，来回切换还要手打，便有了自定义键盘的想法。
> 其实这个车牌需求并不多见，物流、租车、停车相关的会常见一些，好在有前辈已经铺好路了
> 这个比较详细：[https://blog.csdn.net/dgs960825/article/details/50344743](https://blog.csdn.net/dgs960825/article/details/50344743)
#### 1.在res文件夹下新建xml文件夹，新建两个文件：number_or_letters.xml（数字和大写字母）、province_abbreviation.xml（省会、直辖市、特别行政区简称）。
> number_or_letters.xml
```
```
> province_abbreviation.xml
```
```
#### 2.新建键盘工具类KeyboardUtil（初始化、交互、显示和隐藏）
```
package yechaoa.com.platenumberkeyboard;
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.view.WindowManager;
import android.widget.EditText;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
/**
* Created by yechao on 2018/5/15/015.
* Describe :
*/
public class KeyboardUtil {
private Activity mActivity;
private KeyboardView mKeyboardView;
private EditText mEdit;
/**
* 省份简称键盘
*/
private Keyboard provinceKeyboard;
/**
* 数字与大写字母键盘
*/
private Keyboard numberKeyboard;
KeyboardUtil(Activity activity, EditText edit) {
mActivity = activity;
mEdit = edit;
provinceKeyboard = new Keyboard(activity, R.xml.province_abbreviation);
numberKeyboard = new Keyboard(activity, R.xml.number_or_letters);
mKeyboardView = (KeyboardView) activity.findViewById(R.id.keyboard_view);
mKeyboardView.setKeyboard(provinceKeyboard);
mKeyboardView.setEnabled(true);
mKeyboardView.setPreviewEnabled(false);
mKeyboardView.setOnKeyboardActionListener(listener);
}
private KeyboardView.OnKeyboardActionListener listener = new KeyboardView.OnKeyboardActionListener() {
@Override
public void swipeUp() {
}
@Override
public void swipeRight() {
}
@Override
public void swipeLeft() {
}
@Override
public void swipeDown() {
}
@Override
public void onText(CharSequence text) {
}
@Override
public void onRelease(int primaryCode) {
}
@Override
public void onPress(int primaryCode) {
}
@Override
public void onKey(int primaryCode, int[] keyCodes) {
Editable editable = mEdit.getText();
int start = mEdit.getSelectionStart();
//判定是否是中文的正则表达式 [\\u4e00-\\u9fa5]判断一个中文 [\\u4e00-\\u9fa5]+多个中文
String reg = "[\\u4e00-\\u9fa5]";
if (primaryCode == -1) {// 省份简称与数字键盘切换
if (mEdit.getText().toString().matches(reg)) {
changeKeyboard(true);
}
} else if (primaryCode == -3) {
if (editable != null && editable.length() > 0) {
//没有输入内容时软键盘重置为省份简称软键盘
if (editable.length() == 1) {
changeKeyboard(false);
}
if (start > 0) {
editable.delete(start - 1, start);
}
}
} else {
editable.insert(start, Character.toString((char) primaryCode));
// 判断第一个字符是否是中文,是，则自动切换到数字软键盘
if (mEdit.getText().toString().matches(reg)) {
changeKeyboard(true);
}
}
}
};
/**
* 指定切换软键盘 isNumber false表示要切换为省份简称软键盘 true表示要切换为数字软键盘
*/
private void changeKeyboard(boolean isNumber) {
if (isNumber) {
mKeyboardView.setKeyboard(numberKeyboard);
} else {
mKeyboardView.setKeyboard(provinceKeyboard);
}
}
/**
* 软键盘展示状态
*/
public boolean isShow() {
return mKeyboardView.getVisibility() == View.VISIBLE;
}
/**
* 软键盘展示
*/
public void showKeyboard() {
int visibility = mKeyboardView.getVisibility();
if (visibility == View.GONE || visibility == View.INVISIBLE) {
mKeyboardView.setVisibility(View.VISIBLE);
}
}
/**
* 软键盘隐藏
*/
public void hideKeyboard() {
int visibility = mKeyboardView.getVisibility();
if (visibility == View.VISIBLE) {
mKeyboardView.setVisibility(View.INVISIBLE);
}
}
/**
* 禁掉系统软键盘
*/
public void hideSoftInputMethod() {
mActivity.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
int currentVersion = android.os.Build.VERSION.SDK_INT;
String methodName = null;
if (currentVersion >= 16) {
// 4.2
methodName = "setShowSoftInputOnFocus";
} else if (currentVersion >= 14) {
// 4.0
methodName = "setSoftInputShownOnFocus";
}
if (methodName == null) {
mEdit.setInputType(InputType.TYPE_NULL);
} else {
Class cls = EditText.class;
Method setShowSoftInputOnFocus;
try {
setShowSoftInputOnFocus = cls.getMethod(methodName, boolean.class);
setShowSoftInputOnFocus.setAccessible(true);
setShowSoftInputOnFocus.invoke(mEdit, false);
} catch (NoSuchMethodException e) {
mEdit.setInputType(InputType.TYPE_NULL);
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
}
}
```
#### 3.Activity引用
```
package yechaoa.com.platenumberkeyboard;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.widget.EditText;
public class MainActivity extends AppCompatActivity {
private KeyboardUtil keyboardUtil;
private EditText mEditText;
@SuppressLint("ClickableViewAccessibility")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mEditText = findViewById(R.id.edit_text);
mEditText.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent event) {
if (keyboardUtil == null) {
keyboardUtil = new KeyboardUtil(MainActivity.this, mEditText);
keyboardUtil.hideSoftInputMethod();
keyboardUtil.showKeyboard();
} else {
keyboardUtil.showKeyboard();
}
return false;
}
});
mEditText.addTextChangedListener(new TextWatcher() {
@Override
public void afterTextChanged(Editable s) {
Log.i("字符变换后", "afterTextChanged");
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
Log.i("字符变换前", s + "-" + start + "-" + count + "-" + after);
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
Log.i("字符变换中", s + "-" + "-" + start + "-" + before + "-" + count);
}
});
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
if (keyboardUtil.isShow()) {
keyboardUtil.hideKeyboard();
} else {
finish();
}
}
return false;
}
}
```
#### 4.相关属性
android:keyBackground="@drawable/selector_key"
* 按键的背景颜色
android:shadowColor="#FFFFFF"
android:shadowRadius="0.0"
* 不加这两个属性 文字会出现模糊
android:keyTextColor="#000"
* 字体颜色
android:keyTextSize="18sp"
* 字体大小
android:keyIcon="@drawable/ic_delete"
* 按键上的图标
android:codes="20140"
* 输出的内容 对照ASCII表
android:keyLabel="京"
* 按键上显示的内容
android:horizontalGap="0px"
* 水平方向的间隙
android:verticalGap="0px"
* 垂直反向的间隙
android:keyEdgeFlags="right"
* 按键的对齐方式