为 Android 键盘动态应用主题

Question

大家好，Whosebug 的各位，

我在编程软键盘时遇到问题：

我想要实现的是软键盘动态加载一个针对夜间打字优化的 theme/style 和一个针对阳光下打字的 theme/style。样式已经定义，我已经可以通过仅更改 input.xml.

中的样式轻松切换它们

import ... /*Not quite relevant (yet)*/

public class LatinKeyboardView extends KeyboardView {

public LatinKeyboardView(Context context, AttributeSet attrs) {
    this(context, attrs, loadColor());
}

public LatinKeyboardView(Context context, AttributeSet attrs, int defStyle)                 {
    super(context, attrs, defStyle);

}

public static int loadColor() {

    String dbg = android.os.Debug.isDebuggerConnected() ? "Y" : "N";

    android.util.Log.d("loadColor", "Debugger connected: " +  dbg);

    android.os.Debug.waitForDebugger();

    int temp = 0;
    int id = 0;

    if (temp == 1)
    {
        id = R.style.KeyStyle_Day;
    }
    else
    {
        id =  R.style.KeyStyle_Night;
    }

    android.util.Log.d("loadColor", Integer.toString(id));
    return id;
}

当我将调用从第一个构造函数重定向到第二个构造函数时（如 Hacker's Keyboard 源代码所示），软键盘成功加载了 loadColor() 中的样式 id，但之后，内部发生异常我无法追溯，即使有堆栈跟踪：

03-19 08:32:48.313  18630-18630/com.alphanerd.eztype.keyboard E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.alphanerd.eztype.keyboard, PID: 18630
    android.view.InflateException: Binary XML file line #21: Error inflating class com.alphanerd.eztype.keyboard.LatinKeyboardView
            at android.view.LayoutInflater.createView(LayoutInflater.java:626)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:702)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:470)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
            at com.alphanerd.eztype.keyboard.EZTypeKeyboard.onCreateInputView(EZTypeKeyboard.java:125)
            at android.inputmethodservice.InputMethodService.updateInputViewShown(InputMethodService.java:1594)
            at android.inputmethodservice.InputMethodService.showWindowInner(InputMethodService.java:2220)
            at android.inputmethodservice.InputMethodService.showWindow(InputMethodService.java:2179)
            at android.inputmethodservice.InputMethodService$InputMethodImpl.showSoftInput(InputMethodService.java:712)
            at android.inputmethodservice.IInputMethodWrapper.executeMessage(IInputMethodWrapper.java:214)
            at com.android.internal.os.HandlerCaller$MyHandler.handleMessage(HandlerCaller.java:40)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:157)
            at android.app.ActivityThread.main(ActivityThread.java:5335)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.reflect.InvocationTargetException
            at java.lang.reflect.Constructor.constructNative(Native Method)
            at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
            at android.view.LayoutInflater.createView(LayoutInflater.java:600)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:702)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:470)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
            at com.alphanerd.eztype.keyboard.EZTypeKeyboard.onCreateInputView(EZTypeKeyboard.java:125)
            at android.inputmethodservice.InputMethodService.updateInputViewShown(InputMethodService.java:1594)
            at android.inputmethodservice.InputMethodService.showWindowInner(InputMethodService.java:2220)
            at android.inputmethodservice.InputMethodService.showWindow(InputMethodService.java:2179)
            at android.inputmethodservice.InputMethodService$InputMethodImpl.showSoftInput(InputMethodService.java:712)
            at android.inputmethodservice.IInputMethodWrapper.executeMessage(IInputMethodWrapper.java:214)
            at com.android.internal.os.HandlerCaller$MyHandler.handleMessage(HandlerCaller.java:40)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:157)
            at android.app.ActivityThread.main(ActivityThread.java:5335)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.NullPointerException
            at android.inputmethodservice.KeyboardView.<init>(KeyboardView.java:370)
            at com.alphanerd.eztype.keyboard.LatinKeyboardView.<init>(LatinKeyboardView.java:53)
            at java.lang.reflect.Constructor.constructNative(Native Method)
            at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
            at android.view.LayoutInflater.createView(LayoutInflater.java:600)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:702)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:470)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
            at com.alphanerd.eztype.keyboard.EZTypeKeyboard.onCreateInputView(EZTypeKeyboard.java:125)
            at android.inputmethodservice.InputMethodService.updateInputViewShown(InputMethodService.java:1594)
            at android.inputmethodservice.InputMethodService.showWindowInner(InputMethodService.java:2220)
            at android.inputmethodservice.InputMethodService.showWindow(InputMethodService.java:2179)
            at android.inputmethodservice.InputMethodService$InputMethodImpl.showSoftInput(InputMethodService.java:712)
            at android.inputmethodservice.IInputMethodWrapper.executeMessage(IInputMethodWrapper.java:214)
            at com.android.internal.os.HandlerCaller$MyHandler.handleMessage(HandlerCaller.java:40)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:157)
            at android.app.ActivityThread.main(ActivityThread.java:5335)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
            at dalvik.system.NativeStart.main(Native Method)

我希望，你能帮助我。动态加载颜色的代码目前和int temp一样动态；，但稍后我将实现从 sharedpreferences 加载颜色的逻辑（键盘实际上是为了（光学地）与我公司正在开发的另一个应用程序集成）

在此先感谢您的帮助:)

Answer 1

我找到了一个解决方案，我一找到它就认为它非常简单：我没有修改任何构造函数等，而是编辑了被覆盖的 onCreateInputView :

@Override
public View onCreateInputView() {
    int schema = loadColor();

    //Default code

    //mInputView = (LatinKeyboardView) getLayoutInflater().inflate(
    //      R.layout.input, null);

    mInputView = (LatinKeyboardView) getLayoutInflater().inflate(
            schema, null);

    mInputView.setOnKeyboardActionListener(this);
    mInputView.setKeyboard(mQwertyKeyboard);
    return mInputView;
}

public static int loadColor() {

    String dbg = android.os.Debug.isDebuggerConnected() ? "Y" : "N";

    android.util.Log.d("loadColor", "Debugger attached: " +  dbg);

    //android.os.Debug.waitForDebugger(); //Comment this out before releasing the keyboard

    int temp = 1;
    int id = 0;

    if (temp == 1)
    {
        id = R.layout.input_day;
    }
    else
    {
        id =  R.layout.input;
    }

    android.util.Log.d("loadColor", Integer.toString(id));
    return id;
}

通常情况下，LayoutInflater 会加载 google 预期的默认输入布局。我可以推荐定义多个输入布局，每个布局都有自己的风格。如果您自己的自定义键盘应支持用户制作的主题，只需创建一个输入布局并在其中引用一种样式，即引用主题图像。将所有已加载的已加载主题图像放在主题化输入 xml.

可访问的特殊文件夹中

最后一个提示：您可以通过放置 android.os.Debug.waitForDebugger(); 来调试软键盘；在代码中。键盘（或任何其他应用程序）将等待调试器连接。请记住在发布您的应用程序之前删除每个 waitForDebugger() 调用，否则应用程序将在您忘记删除此行的任何地方停止运行。我希望，我可以帮助任何阅读本文的人。

谢谢你，祝你有愉快的一天:)

为 Android 键盘动态应用主题

Apply theme dynamically for Android Keyboard

java

keyboard

android

styles

ime