我想在我的安卓应用程序中创建一个自定义键盘，如下所示：
https://www.dropbox.com/s/vwiz4o3pd8q4o81/2015-06-14%2014.53.02.jpg?dl=0
我尝试使用键盘视图，但无法得到我想要的。我还在网上查看了有关自定义键盘的教程，但似乎没有一个提示如何制作我想要的键盘。我尝试将 png 图像作为键盘的背景，但这没有帮助。到目前为止，我已经做了这个：
https://www.dropbox.com/s/xrm4v941ofecmut/2015-06-14%2014.54.10.jpg?dl=0
我可以获得帮助或指向教程和代码的链接，以帮助解决我的问题。
这是我当前的代码：
<?xml version="1.0" encoding="utf-8"?>
<Keyboard xmlns:android="http://schemas.android.com/apk/res/android"
android:keyWidth="14.25%p"
android:hapticFeedbackEnabled="true"
android:keyHeight="8.5%p">
<!--
android:horizontalGap="0.50%p"
android:verticalGap="0.50%p"
NOTE When we add a horizontalGap in pixels, this interferes with keyWidth in percentages adding up to 100%
NOTE When we have a horizontalGap (on Keyboard level) of 0, this make the horizontalGap (on Key level) to move from after the key to before the key... (I consider this a bug)
-->
<Row>
<Key android:codes="-1" android:keyLabel="EVALUATE" android:keyWidth="42.75%p" android:keyEdgeFlags="left" />
<Key android:codes="-100" android:keyLabel="RESET" android:keyWidth="28.50%p" />
<Key android:codes="-1000" android:keyLabel="u24D8" android:keyWidth="28.50%p" android:keyEdgeFlags="right" />
</Row>
<Row>
<Key android:codes="1" android:keyLabel="sin" android:keyEdgeFlags="left" />
<Key android:codes="2" android:keyLabel="cos" />
<Key android:codes="3" android:keyLabel="tan" />
<Key android:codes="36" android:keyLabel="sinh" />
<Key android:codes="37" android:keyLabel="cosh" />
<Key android:codes="38" android:keyLabel="tanh" />
<Key android:codes="-2" android:keyIcon="@drawable/delete_symbol" android:isRepeatable="true" android:keyEdgeFlags="right"/>
</Row>
<Row>
<Key android:codes="4" android:keyLabel="asin" android:keyEdgeFlags="left" />
<Key android:codes="5" android:keyLabel="acos" />
<Key android:codes="6" android:keyLabel="atan" />
<Key android:codes="42" android:keyLabel="asinh" />
<Key android:codes="43" android:keyLabel="acosh" />
<Key android:codes="44" android:keyLabel="atanh" />
<Key android:codes="21" android:keyLabel="u00F7" android:keyEdgeFlags="right" />
</Row>
<Row>
<Key android:codes="7" android:keyLabel="cosec" android:keyEdgeFlags="left" />
<Key android:codes="8" android:keyLabel="sec" />
<Key android:codes="9" android:keyLabel="cot" />
<Key android:codes="33" android:keyLabel="7" />
<Key android:codes="34" android:keyLabel="8" />
<Key android:codes="35" android:keyLabel="9" />
<Key android:codes="20" android:keyLabel="u00D7" android:keyEdgeFlags="right" />
</Row>
<Row>
<Key android:codes="11" android:keyLabel="e^(" />
<Key android:codes="12" android:keyLabel="ln(" />
<Key android:codes="22" android:keyLabel="xu207F" />
<Key android:codes="30" android:keyLabel="4" />
<Key android:codes="31" android:keyLabel="5" />
<Key android:codes="32" android:keyLabel="6" />
<Key android:codes="19" android:keyLabel="u2212" android:keyEdgeFlags="right" />
</Row>
<Row>
<Key android:codes="14" android:keyLabel="k" android:keyEdgeFlags="left" />
<Key android:codes="15" android:keyLabel="u03C0" />
<Key android:codes="13" android:keyIcon="@drawable/italic_x" />
<Key android:codes="27" android:keyLabel="1" />
<Key android:codes="28" android:keyLabel="2" />
<Key android:codes="29" android:keyLabel="3" />
<Key android:codes="18" android:keyLabel="+" android:keyEdgeFlags="right" />
</Row>
<Row>
<Key android:codes="-3" android:keyIcon="@drawable/keyboard_done" android:keyWidth="28.5%p" android:keyEdgeFlags="left" />
<Key android:codes="10" android:keyLabel="u221a" />
<Key android:codes="16" android:keyLabel="(" />
<Key android:codes="26" android:keyLabel="0" />
<Key android:codes="17" android:keyLabel=")" />
<Key android:codes="23" android:keyLabel="." android:keyEdgeFlags="right" />
</Row>
</Keyboard>
带有 xml 文件的 java 处理程序的代码为：
class CustomKeyboard {
private Activity mHostActivity;
private Button doneButton = null;
private Button clearButton = null;
private Button infoButton = null;
/** The key (code) handler. */
private OnKeyboardActionListener mOnKeyboardActionListener = new OnKeyboardActionListener() {
public final static int CodeEvaluate = -1;
public final static int CodeClear = -100;
public final static int CodeInfo = -1000;
public final static int CodeDelete = -2; // Keyboard.KEYCODE_DELETE
public final static int CodeHide = -3; // Keyboard.KEYCODE_CANCEL
public final static int CodeMINIMUM = 0;
public final static int CodeSin = 1;
public final static int CodeCos = 2;
public final static int CodeTan = 3;
public final static int CodeAsin = 4;
public final static int CodeAcos = 5;
public final static int CodeAtan = 6;
public final static int CodeCosec = 7;
public final static int CodeSec = 8;
public final static int CodeCot = 9;
public final static int CodeSqrt = 10;
public final static int CodeExp = 11;
public final static int CodeLn = 12;
public final static int CodeX = 13;
public final static int CodeK = 14;
public final static int CodePI = 15;
public final static int CodeOpenB = 16;
public final static int CodeCloseB = 17;
public final static int CodePlus = 18;
public final static int CodeMinus = 19;
public final static int CodeMultiply = 20;
public final static int CodeDivide = 21;
public final static int CodePower = 22;
public final static int CodePoint = 23;
public final static int CodeABC = 24;
public final static int CodeSpace = 25;
public final static int CodeMAXIMUM = 50; // maximum number of Keys
public String[] keyCodeToText = null;
public void keysInitialise()
{
if(keyCodeToText==null) keyCodeToText = new String[CodeMAXIMUM];
keyCodeToText[CodeSin] = "sin(";
keyCodeToText[CodeCos] = "cos(";
keyCodeToText[CodeTan] = "tan(";
keyCodeToText[CodeAsin] = "asin(";
keyCodeToText[CodeAcos] = "acos(";
keyCodeToText[CodeAtan] = "atan(";
keyCodeToText[CodeCosec] = "cosec(";
keyCodeToText[CodeSec] = "sec(";
keyCodeToText[CodeCot] = "cot(";
keyCodeToText[CodeSqrt] = "sqrt(";
keyCodeToText[CodeExp] = "e^(";
keyCodeToText[CodeLn] = "ln(";
keyCodeToText[CodeX] = "x";
keyCodeToText[CodeK] = "k";
keyCodeToText[CodePI] = "pi";
keyCodeToText[CodeOpenB] = "(";
keyCodeToText[CodeCloseB] = ")";
keyCodeToText[CodePlus] = "+";
keyCodeToText[CodeMinus] = "-";
keyCodeToText[CodeMultiply] = "*";
keyCodeToText[CodeDivide] = "/";
keyCodeToText[CodePower] = "^";
keyCodeToText[CodePoint] = ".";
keyCodeToText[CodeABC ] = "";
}
@Override
public void onKey(int primaryCode, int[] keyCodes) {
// Get the EditText and its Editable
View focusCurrent = mHostActivity.getWindow().getCurrentFocus();
if( focusCurrent==null || focusCurrent.getClass()!=EditText.class ) return;
EditText edittext = (EditText) focusCurrent;
Editable editable = edittext.getText();
int start = edittext.getSelectionStart();
keysInitialise();
// Apply the key to the edittext
if(primaryCode == CodeEvaluate) {
if(doneButton != null) doneButton.performClick();
}
else if (primaryCode == CodeClear){
if(clearButton != null) clearButton.performClick();
}
else if (primaryCode == CodeInfo){
if(infoButton != null) infoButton.performClick();
}
else if(primaryCode ==CodeDelete) {
if( editable!=null && start>0 ) editable.delete(start - 1, start);
}
else if(primaryCode == CodeHide) {
hideCustomKeyboard();
}
else if(primaryCode > CodeMINIMUM && primaryCode < CodeMAXIMUM) {
editable.insert(start, keyCodeToText[primaryCode]);
}
else editable.insert(start, Integer.toString(primaryCode));
}
@Override public void onPress(int arg0) {
}
@Override public void onRelease(int primaryCode) {
}
@Override public void onText(CharSequence text) {
}
public CustomKeyboard(Activity host, int viewid, int layoutid) {
mHostActivity= host;
mKeyboardView= (KeyboardView)mHostActivity.findViewById(viewid);
mKeyboardView.setKeyboard(new Keyboard(mHostActivity, layoutid));
mKeyboardView.setPreviewEnabled(false); // NOTE Do not show the preview balloons
mKeyboardView.setOnKeyboardActionListener(mOnKeyboardActionListener);
}
/** Returns whether the CustomKeyboard is visible. */
public boolean isCustomKeyboardVisible() {
return mKeyboardView.getVisibility() == View.VISIBLE;
}
/** Make the CustomKeyboard visible, and hide the system keyboard for the given view. */
public void showCustomKeyboard(View v) {
mKeyboardView.setVisibility(View.VISIBLE);
mKeyboardView.setEnabled(true);
}
/** Make the CustomKeyboard invisible. */
public void hideCustomKeyboard() {
mKeyboardView.setVisibility(View.GONE);
mKeyboardView.setEnabled(false);
}
/** Hide standard keyboard */
private void hideStandardKeyboard(View v) {
if(v != null) ((InputMethodManager)mHostActivity.getSystemService(Activity.INPUT_METHOD_SERVICE)).hideSoftInputFromWindow(v.getWindowToken(), 0);
}
/** Register the doneButton for which doneButton.performClick()
* will be called when the "Done" keypad-button is clicked.
*/
public void registerDoneButton (Button doneButton) {
this.doneButton = doneButton;
}
public void registerClearButton (Button clearButton) {
this.clearButton = clearButton;
}
public void registerInfoButton (Button infoButton) {
this.infoButton = infoButton;
}
/**
* Register <var>EditText<var> for using this custom keyboard.
*
* @param The EditText that registers to the custom keyboard.
*/
public void registerEditText(EditText edittext) {
// Make the custom keyboard appear or disappear
edittext.setOnFocusChangeListener(new OnFocusChangeListener() {
@Override public void onFocusChange(View v, boolean hasFocus) {
if(hasFocus) showCustomKeyboard(v);
else hideCustomKeyboard();
}
});
edittext.setOnClickListener(new OnClickListener() {
@Override public void onClick(View v) {
showCustomKeyboard(v);
}
});
edittext.setOnTouchListener(new OnTouchListener() {
@Override public boolean onTouch(View v, MotionEvent event) {
((EditText) v).onTouchEvent(event);
hideStandardKeyboard(v);
return true; // Consume touch event
}
});
}
由于您具有键盘的布局 xml，因此要使键盘等于第一个图像中显示的键盘。您应该具有密钥视图的背景，并将其添加到每个密钥中。