弃用 KeyboardView 后，我按照谷歌文档进行操作，正如他们所说，我将 KeyboardView 和 Keyboard 类复制到我的项目中。我按照建议设置的所有内容。
问题是当我运行我的应用程序时，它会因抛出错误充气 KeyboardView的错误而崩溃。
这是我的代码。
public class SimpleKB extends InputMethodService implements
KeyboardView.OnKeyboardActionListener {
private KeyboardView kv;
private Keyboard keyboard;
private Keyboard symbols;
private Keyboard eng_keyboard;
//Core overridden Functions
@Override public View onCreateInputView() {
kv = (KeyboardView) getLayoutInflater().inflate(R.layout.keyboard, null);
keyboard = new Keyboard(this, R.xml.qwerty);
symbols = new Keyboard(this, R.xml.symbol);
eng_keyboard = new Keyboard(this, R.xml.eng_qwerty);
kv.setKeyboard(keyboard);
kv.setOnKeyboardActionListener(this);
return kv;
}
@Override public void onInitializeInterface() {
if (keyboard != null) {
// Configuration changes can happen after the keyboard gets recreated,
// so we need to be able to re-build the keyboards if the available
// space has changed.
int displayWidth = getMaxWidth();
if (displayWidth == mLastDisplayWidth) return;
mLastDisplayWidth = displayWidth;
}
keyboard = new Keyboard(this, R.xml.qwerty);
}
这是用于显示建议单词的 CandidateView 类。
public class CandidateView extends View {
private static final int OUT_OF_BOUNDS = -1;
private SimpleKB mService;
private List<String> mSuggestions;
private int mSelectedIndex;
private int mTouchX = OUT_OF_BOUNDS;
private Drawable mSelectionHighlight;
private boolean mTypedWordValid;
private Rect mBgPadding;
private static final int MAX_SUGGESTIONS = 32;
private static final int SCROLL_PIXELS = 20;
private int[] mWordWidth = new int[MAX_SUGGESTIONS];
private int[] mWordX = new int[MAX_SUGGESTIONS];
private static final int X_GAP = 10;
private static final List<String> EMPTY_LIST = new ArrayList<String>();
private int mColorNormal;
private int mColorRecommended;
private int mColorOther;
private int mVerticalPadding;
private Paint mPaint;
private boolean mScrolled;
private int mTargetScrollX;
private int mTotalWidth;
private GestureDetector mGestureDetector;
/**
* Construct a CandidateView for showing suggested words for completion.
* @param context
*/
public CandidateView(Context context) {
super(context);
mSelectionHighlight = context.getResources().getDrawable(
android.R.drawable.list_selector_background);
mSelectionHighlight.setState(new int[] {
android.R.attr.state_enabled,
android.R.attr.state_focused,
android.R.attr.state_window_focused,
android.R.attr.state_pressed
});
Resources r = context.getResources();
setBackgroundColor(r.getColor(R.color.candidate_background));
mColorNormal = r.getColor(R.color.candidate_normal);
mColorRecommended = r.getColor(R.color.candidate_recommended);
mColorOther = r.getColor(R.color.candidate_other);
mVerticalPadding = r.getDimensionPixelSize(R.dimen.candidate_vertical_padding);
mPaint = new Paint();
mPaint.setColor(mColorNormal);
mPaint.setAntiAlias(true);
mPaint.setTextSize(r.getDimensionPixelSize(R.dimen.candidate_font_height));
mPaint.setStrokeWidth(0);
mGestureDetector = new GestureDetector(new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2,
float distanceX, float distanceY) {
mScrolled = true;
int sx = getScrollX();
sx += distanceX;
if (sx < 0) {
sx = 0;
}
if (sx + getWidth() > mTotalWidth) {
sx -= distanceX;
}
mTargetScrollX = sx;
scrollTo(sx, getScrollY());
invalidate();
return true;
}
});
setHorizontalFadingEdgeEnabled(true);
setWillNotDraw(false);
setHorizontalScrollBarEnabled(false);
setVerticalScrollBarEnabled(false);
}
这是我的 xml 布局，带有我的自定义 KeyboardView。
<?xml version="1.0" encoding="UTF-8"?>
<com.android.urdu.KeyboardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/keyboard"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:keyTextSize="15sp"
android:layout_alignParentBottom="true"
android:keyPreviewLayout="@layout/preview" />
这是我得到的错误。
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.android.urdu, PID: 17584
android.view.InflateException: Binary XML file line #2 in com.android.urdu:layout/keyboard: Binary XML file line #2 in com.android.urdu:layout/keyboard: Error inflating class com.android.urdu.KeyboardView
Caused by: android.view.InflateException: Binary XML file line #2 in com.android.urdu:layout/keyboard: Error inflating class com.android.urdu.KeyboardView
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
at android.view.LayoutInflater.createView(LayoutInflater.java:858)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:1014)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:965)
at android.view.LayoutInflater.inflate(LayoutInflater.java:663)
at android.view.LayoutInflater.inflate(LayoutInflater.java:538)
at android.view.LayoutInflater.inflate(LayoutInflater.java:481)
at com.android.urdu.SimpleKB.onCreateInputView(SimpleKB.java:62)
at android.inputmethodservice.InputMethodService.updateInputViewShown(InputMethodService.java:1531)
at android.inputmethodservice.InputMethodService.prepareWindow(InputMethodService.java:1961)
at android.inputmethodservice.InputMethodService.showWindow(InputMethodService.java:1908)
at android.inputmethodservice.InputMethodService$InputMethodImpl.showSoftInput(InputMethodService.java:643)
at android.inputmethodservice.IInputMethodWrapper.executeMessage(IInputMethodWrapper.java:220)
at com.android.internal.os.HandlerCaller$MyHandler.handleMessage(HandlerCaller.java:44)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:224)
at android.app.ActivityThread.main(ActivityThread.java:7561)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:995)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.graphics.drawable.Drawable.getPadding(android.graphics.Rect)' on a null object reference
at com.android.urdu.KeyboardView.<init>(KeyboardView.java:278)
at com.android.urdu.KeyboardView.<init>(KeyboardView.java:200)
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
at android.view.LayoutInflater.createView(LayoutInflater.java:858)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:1014)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:965)
at android.view.LayoutInflater.inflate(LayoutInflater.java:663)
at android.view.LayoutInflater.inflate(LayoutInflater.java:538)
at android.view.LayoutInflater.inflate(LayoutInflater.java:481)
at com.android.urdu.SimpleKB.onCreateInputView(SimpleKB.java:62)
at android.inputmethodservice.InputMethodService.updateInputViewShown(InputMethodService.java:1531)
at android.inputmethodservice.InputMethodService.prepareWindow(InputMethodService.java:1961)
at android.inputmethodservice.InputMethodService.showWindow(InputMethodService.java:1908)
at android.inputmethodservice.InputMethodService$InputMethodImpl.showSoftInput(InputMethodService.java:643)
at android.inputmethodservice.IInputMethodWrapper.executeMessage(IInputMethodWrapper.java:220)
at com.android.internal.os.HandlerCaller$MyHandler.handleMessage(HandlerCaller.java:44)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:224)
at android.app.ActivityThread.main(ActivityThread.java:7561)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:995)
请告诉我我在这方面缺少什么。我需要帮助。