Java 自定义键盘：处理输入类型更改

我遇到了一个我无法解决的问题。我根据示例编写了一个简单的自定义输入法键盘

它基本上有两个自定义键盘，一个用于字母，一个用于数字。它们使用不同的布局

但是，当我添加两个

EditText

控件时，一个用于文本，另一个用于数字，键盘不会刷新为它所属的类型。我的意思是，如果我先用

inputType=“text”

选择

EditText

，就会出现QWERTY键盘布局。但是，当我用

inputType=“number”

选择第二个

EditText

时，QWERTY键盘再次出现。但是，它应该为连接到代码中的数字加载不同的布局

换句话说，这里是测试活动布局：

现在，如果我选择“文本”字段，QWERTY键盘显示如下：

但是，如果我选择“数字”字段，QWERTY键盘仍然会显示错误

预期的行为是显示此键盘

这是CustomIME的代码，我尝试在视图上使用

postInvalidate（）

，在

onInitializeInterface（）期间预加载所有布局，但没有任何效果。它永远不会正确地切换到号码的布局

public class CustomIME extends InputMethodService
        implements KeyboardView.OnKeyboardActionListener {

    public static final String CUSTOM_IME = "CUSTOM_IME";
    private KeyboardView mKeyboardView;
    private Keyboard mKeyboardCurrent;
    private KeyboardType mKeyboardTypeCurrent = KeyboardType.QWERTY_LETTERS;
    private boolean mCAPs = false;


    enum KeyboardType {
        QWERTY_LETTERS,
        NUMBERS
    }

    @Override
    public View onCreateInputView() {
        loadCurrentKeyboard();
        mKeyboardView = (KeyboardView) getLayoutInflater().inflate(R.layout.custom_ime_keyboard, null);
        mKeyboardView.setBackgroundResource(R.drawable.btn_gradient);
        mKeyboardView.setOnKeyboardActionListener(this);

        if (mKeyboardCurrent != null) {
            mKeyboardView.setKeyboard(mKeyboardCurrent);
        }

        return mKeyboardView;
    }

    @Override
    public void onInitializeInterface() {
        // tried loading everything here but did not make a difference
    }

    private void loadCurrentKeyboard() {
        if (mKeyboardTypeCurrent == KeyboardType.QWERTY_LETTERS) {
            mKeyboardCurrent = new Keyboard(getApplicationContext(), R.xml.custom_ime_qwerty);
        } else if (mKeyboardTypeCurrent == KeyboardType.NUMBERS) {
            mKeyboardCurrent = new Keyboard(getApplicationContext(), R.xml.custom_ime_number);
        } else {
            Log.e(CUSTOM_IME, "Invalid keyboard type");
        }
    }

    @Override
    public void onStartInput(EditorInfo attribute, boolean restarting) {
        super.onStartInput(attribute, restarting);
        switch (attribute.inputType & InputType.TYPE_MASK_CLASS) {
            case InputType.TYPE_CLASS_NUMBER:
                boolean signed = (attribute.inputType & InputType.TYPE_NUMBER_FLAG_SIGNED) != 0;
                boolean decimal = (attribute.inputType & InputType.TYPE_NUMBER_FLAG_DECIMAL) != 0;

                // set default
                mKeyboardTypeCurrent = KeyboardType.QWERTY_LETTERS;
                if (!signed && !decimal) {
                    mKeyboardTypeCurrent = KeyboardType.NUMBERS;
                }
                break;
            case InputType.TYPE_CLASS_TEXT:
            default:
                mKeyboardTypeCurrent = KeyboardType.QWERTY_LETTERS;
        }

        // This did not make a difference
        if (mKeyboardView != null) {
            mKeyboardView.postInvalidate();
        }
    }

    @Override
    public void onKey(int primaryCode, int[] keyCodes) {
        InputConnection inputConnection = getCurrentInputConnection();
        switch (primaryCode) {
            default:
                char asciiCode = (char) primaryCode;
                if (Character.isLetter(asciiCode) && mCAPs) {
                    asciiCode = Character.toUpperCase(asciiCode);
                }
                inputConnection.commitText(String.valueOf(asciiCode), 1);
        }
    }
}

以及布局：

自定义\u ime\u keyboard.xml：

<?xml version="1.0" encoding="UTF-8"?>
<android.inputmethodservice.KeyboardView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/custom_ime_keyboard_id1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:keyPreviewLayout="@layout/custom_ime_preview" />



活动\u main.xml

<LinearLayout
    android:id="@+id/layout1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:layout_margin="10dp"
    android:orientation="horizontal">

    <EditText
        android:id="@+id/edit1"
        android:layout_width="100dp"
        android:layout_height="60dp"
        android:inputType="text"
        android:hint="Text"
        android:padding="10dp"
        android:textSize="12sp" />

    <EditText
        android:id="@+id/edit2"
        android:layout_width="100dp"
        android:layout_height="60dp"
        android:hint="Number"
        android:inputType="number"
        android:padding="10dp"
        android:textSize="12sp" />
</LinearLayout>



最后是键盘布局（custom\u ime\u qwerty.xml，以及custom\u ime\u number.xml）


等
我认为这是您需要获得的回调：

在显示输入视图并且在新编辑器上启动输入时调用。这将始终在启动输入（EditorInfo，布尔值）后调用，允许您在此处执行常规设置，并在此处查看特定设置。我们保证在调用此函数之前的一段时间内，onCreateInputView（）将被调用

因此，您可以知道要显示的确切输入类型，但切换到这种新键盘类型的实际位置应该是

查看示例应用程序如何处理该功能



@Override public void onStartInput(EditorInfo attribute, boolean restarting) {
    super.onStartInput(attribute, restarting);

    ...

    // We are now going to initialize our state based on the type of
    // text being edited.
    switch (attribute.inputType & InputType.TYPE_MASK_CLASS) {
        case InputType.TYPE_CLASS_NUMBER:
        case InputType.TYPE_CLASS_DATETIME:
            mCurKeyboard = mSymbolsKeyboard;
            break;

        case InputType.TYPE_CLASS_PHONE:
            mCurKeyboard = mSymbolsKeyboard;
            break;

        case InputType.TYPE_CLASS_TEXT:
            mCurKeyboard = mQwertyKeyboard;
            ...
            break;

        default:
            // For all unknown input types, default to the alphabetic
            // keyboard with no special features.
            mCurKeyboard = mQwertyKeyboard;
    }

}

@Override public void onStartInputView(EditorInfo attribute, boolean restarting) {
    super.onStartInputView(attribute, restarting);
    // Apply the selected keyboard to the input view.
    setLatinKeyboard(mCurKeyboard);
    ...
}

private void setLatinKeyboard(LatinKeyboard nextKeyboard) {
    final boolean shouldSupportLanguageSwitchKey =
            mInputMethodManager.shouldOfferSwitchingToNextInputMethod(getToken());
    nextKeyboard.setLanguageSwitchKeyVisibility(shouldSupportLanguageSwitchKey);
    mInputView.setKeyboard(nextKeyboard);
}


我相信阿齐兹比基安是正确的。您需要更改代码以添加
onStartInputView（）
。它看起来像这样@Override public void onStartInputView（EditorInfo信息，布尔重新启动）{super.onStartInputView（属性，重新启动）；loadCurrentKeyboard（）；kv.setKeyboard（mKeyboardCurrent）；}下面是一个简单数字键盘和文本键盘的工作代码。请注意，
InputType.TYPE\u MASK\u CLASS
仅用于整个类型。如果需要更具体的类型，如
InputType.type\u TEXT\u VARIATION\u peopologic
，则不会使用此掩码。还有一个
类型\u掩码\u变体
。


@Override public void onStartInput(EditorInfo attribute, boolean restarting) {
    super.onStartInput(attribute, restarting);

    ...

    // We are now going to initialize our state based on the type of
    // text being edited.
    switch (attribute.inputType & InputType.TYPE_MASK_CLASS) {
        case InputType.TYPE_CLASS_NUMBER:
        case InputType.TYPE_CLASS_DATETIME:
            mCurKeyboard = mSymbolsKeyboard;
            break;

        case InputType.TYPE_CLASS_PHONE:
            mCurKeyboard = mSymbolsKeyboard;
            break;

        case InputType.TYPE_CLASS_TEXT:
            mCurKeyboard = mQwertyKeyboard;
            ...
            break;

        default:
            // For all unknown input types, default to the alphabetic
            // keyboard with no special features.
            mCurKeyboard = mQwertyKeyboard;
    }

}

@Override public void onStartInputView(EditorInfo attribute, boolean restarting) {
    super.onStartInputView(attribute, restarting);
    // Apply the selected keyboard to the input view.
    setLatinKeyboard(mCurKeyboard);
    ...
}

private void setLatinKeyboard(LatinKeyboard nextKeyboard) {
    final boolean shouldSupportLanguageSwitchKey =
            mInputMethodManager.shouldOfferSwitchingToNextInputMethod(getToken());
    nextKeyboard.setLanguageSwitchKeyVisibility(shouldSupportLanguageSwitchKey);
    mInputView.setKeyboard(nextKeyboard);
}