概述
Android自定义键盘，仿招商银行。本文源码见 github 项目 MyKeyboard。
1.解决方案
轻量级解决方案-PopupWindow实现。
键盘效果：
2.实现原理
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| mKeyboardView = (MyKeyboardView) mIncludeKeyboardview.findViewById(R.id.keyboard_view);
mWindow = new PopupWindow(mIncludeKeyboardview, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT, false);
mWindow.showAtLocation(mParent, Gravity.BOTTOM, 0, 0);
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2.2 实现自定义键盘（支持切换字母、数字、符号、随机键盘）
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| class MyKeyboardView extends KeyboardView {
public void init(EditText editText, PopupWindow window, int keyBoardType) {
this.mEditText = editText;
this.mWindow = window;
if (keyBoardType == KEYBOARDTYPE_Pwd)
isPwd = true;
setEnabled(true);
setPreviewEnabled(false);
setOnKeyboardActionListener(mOnKeyboardActionListener);//按键监听
setKeyBoardType(keyBoardType);
}
//键盘类型支持字母、数字、符号、随机键盘
public void setKeyBoardType(int keyBoardType) {
switch (keyBoardType) {
case KEYBOARDTYPE_Num:
if (keyboardNum == null)
keyboardNum = new Keyboard(getContext(), R.xml.keyboard_number);
setKeyboard(keyboardNum);
break;
case KEYBOARDTYPE_ABC:
if (keyboardABC == null)
keyboardABC = new Keyboard(getContext(), R.xml.keyboard_abc);
setKeyboard(keyboardABC);
break;
case KEYBOARDTYPE_Pwd:
if (keyboardPwd == null)
keyboardPwd = new Keyboard(getContext(), R.xml.keyboard_number);
randomKey(keyboardPwd);
setKeyboard(keyboardPwd);
break;
case KEYBOARDTYPE_Symbol:
if (keyboardSymbol == null)
keyboardSymbol = new Keyboard(getContext(), R.xml.keyboard_symbol);
setKeyboard(keyboardSymbol);
break;
}
}
}
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2.3 点击空白处隐藏键盘 (重写View的事件分发)
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| @Override
public boolean dispatchTouchEvent(MotionEvent ev) {
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
cancelOvertimeRunable();
if (KeyboardTool.isTouchView(filterViewByIds(), ev))//过滤的EditText,不做处理
return super.dispatchTouchEvent(ev);
View v = getCurrentFocus();
if (KeyboardTool.isFocusEditText(v, systemEditViewIds())//当前焦点在系统键盘EditText
&& !KeyboardTool.isTouchView(systemEditViewIds(), ev)) {//且没有触摸在系统键盘EditText
KeyboardTool.hideInputForce(mContext, v);//隐藏系统键盘
v.clearFocus();//清空焦点
} else if (KeyboardTool.isFocusEditText(v, customEditViewIds())//当前焦点在自定义键盘EditText
&& !KeyboardTool.isTouchView(customEditViewIds(), ev)) {//且没有触摸在自定义键盘EditText
if (getKeyboardUtil() != null)//隐藏自定义键盘
getKeyboardUtil().hide();
v.clearFocus();//清空焦点
}
break;
case MotionEvent.ACTION_UP:
startOvertimeRunable();
break;
}
return super.dispatchTouchEvent(ev);
}
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2.4 键盘上推（设置根布局margintop）
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| //调整父控件位置，键盘不挡住编辑框
int nKeyBoardToTopHeight = mHeightPixels - mKeyboardHeight;//屏幕高度-键盘高度
int[] editLocal = new int[2];
editText.getLocationOnScreen(editLocal);
ViewGroup.MarginLayoutParams lp = (ViewGroup.MarginLayoutParams) mParent.getLayoutParams();
if (editLocal[1] + mEditTextHeight * 2 > nKeyBoardToTopHeight) {
int height = editLocal[1] - lp.topMargin - nKeyBoardToTopHeight;
int mScrollToValue = height + mEditTextHeight * 2;
lp.topMargin = 0 - mScrollToValue;
mParent.setLayoutParams(lp);
mScrollTo = true;
}
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