android keyboardview 清空,重写Keyboard

各键对应的编码绘制步骤1、写keyboard的xml文件android:horizontalGap="12dp"android:verticalGap="14dp"android:keyWidth="33.33333%p"android:keyHeight="8%p">android:codes="49"android:keyLabel="1">android:codes="50"an

weixin_39728221

517人浏览 · 2021-06-03 20:38:17

weixin_39728221 · 2021-06-03 20:38:17 发布

各键对应的编码

AAffA0nNPuCLAAAAAElFTkSuQmCC

绘制步骤1、写keyboard的xml文件<?xml version="1.0" encoding="utf-8"?>

android:horizontalGap="12dp"

android:verticalGap="14dp"

android:keyWidth="33.33333%p"

android:keyHeight="8%p">

android:codes="49"

android:keyLabel="1">

android:codes="50"

android:keyLabel="2">

android:codes="51"

android:keyLabel="3">

android:codes="52"

android:keyLabel="4">

android:codes="53"

android:keyLabel="5">

android:codes="54"

android:keyLabel="6">

android:codes="55"

android:keyLabel="7">

android:codes="56"

android:keyLabel="8">

android:codes="57"

android:keyLabel="9">

android:codes="48"

android:keyLabel="0">

android:codes="43"

android:keyLabel="+">

android:codes="45"

android:keyLabel="-">

android:codes="46"

android:keyLabel=".">

android:codes="-3"

android:keyLabel="C">

android:codes="-5"

android:isRepeatable="false"

android:keyIcon="@drawable/ic_calculator_delete"/>

2、重写 KeyboardViewpublic class NumKeyView extends KeyboardView implements KeyboardView.OnKeyboardActionListener { //用于区分左下角空白按键,(要与xml里设置的数值相同)

private int KEYCODE_EMPTY = -10; private Drawable mDeleteKeyDrawable; //删除按键背景图片

private int mKryboardBackgroud; private Drawable mKryDrawable; //按键背景

private int mPaddingLeft; private int mPaddingRight; private int mPaddingTop; private int mPaddingBottom; public NumKeyView(Context context, AttributeSet attrs) { super(context, attrs);

init(context, attrs, 0);

} public NumKeyView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr);

init(context, attrs, defStyleAttr);

} private void init(Context context, AttributeSet attrs, int defStyleAttr) {

TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.NumKeyView);

mKryDrawable = ta.getDrawable(R.styleable.NumKeyView_keyBackgBackground);

mDeleteKeyDrawable = ta.getDrawable(R.styleable.NumKeyView_deleteDrawable); //删除按键颜色

mKryboardBackgroud = ta.getColor(R.styleable.NumKeyView_keyboardBackgBackground, Color.WHITE); //keyboard背景颜色

mPaddingLeft = (int) ta.getDimension(R.styleable.NumKeyView_leftPadding, 0);

mPaddingRight = (int) ta.getDimension(R.styleable.NumKeyView_rightPadding, 0);

mPaddingTop = (int) ta.getDimension(R.styleable.NumKeyView_topPadding, 0);

mPaddingBottom = (int) ta.getDimension(R.styleable.NumKeyView_bottomPadding, 0);

ta.recycle(); //获取xml中的按键布局

Keyboard keyboard = new Keyboard(context, R.xml.numkeyview);

setKeyboard(keyboard);

setEnabled(true);

setPreviewEnabled(false);

setOnKeyboardActionListener(this);

} @Override

public void onDraw(Canvas canvas) { super.onDraw(canvas);

canvas.drawColor(mKryboardBackgroud);

drawKeyboardBorder(canvas);

Keyboard keyboard = getKeyboard(); if (keyboard == null) return;

List keys = keyboard.getKeys(); if (keys != null && keys.size() > 0) {

Paint paint = new Paint();

paint.setTextAlign(Paint.Align.CENTER);

Typeface font = Typeface.create(Typeface.SANS_SERIF, Typeface.BOLD);

paint.setTypeface(font);

paint.setAntiAlias(true); for (Keyboard.Key key : keys) { if (key.codes[0] == Keyboard.KEYCODE_DELETE) { //绘制删除键背景

drawKeyBackGround(key, canvas); //绘制按键图片

drawkeyDelete(key, canvas);

} else {

drawKeyBackGround(key, canvas);

} if (key.label != null) { if (key.codes[0] == Keyboard.KEYCODE_DELETE) {

} else {

paint.setColor(getContext().getResources().getColor(R.color.c000000));

paint.setTextSize(sp2px(25));

}

Rect rect = new Rect(key.x, key.y, key.x + key.width, key.y + key.height);

Paint.FontMetricsInt fontMetrics = paint.getFontMetricsInt(); int baseline = (rect.bottom + rect.top - fontMetrics.bottom - fontMetrics.top) / 2; // 下面这行是实现水平居中，drawText对应改为传入targetRect.centerX()

paint.setTextAlign(Paint.Align.CENTER);

canvas.drawText(key.label.toString(), rect.centerX(), baseline, paint);

}

} //绘制边框

private void drawKeyboardBorder(Canvas canvas) {

} //数字键

private void drawKeyBackGround(Keyboard.Key key, Canvas canvas) {

mKryDrawable.setBounds(key.x, key.y, key.x + key.width, key.y + key.height);

mKryDrawable.draw(canvas);

} //删除键

private void drawkeyDelete(Keyboard.Key key, Canvas canvas) { int drawWidth = key.width; int drawHeight = key.height;

drawWidth = drawWidth / 2;

drawHeight = drawHeight / 2; int widthInterval = (key.width - drawWidth) / 2; int heightInterval = (key.height - drawHeight) / 2;

mDeleteKeyDrawable.setBounds(key.x + widthInterval, key.y + heightInterval,

key.x + widthInterval + drawWidth, key.y + heightInterval + drawHeight);

mDeleteKeyDrawable.draw(canvas);

} //回调接口

public interface OnKeyPressListener { //添加数据回调

void onInertKey(String text); //删除数据回调

void onDeleteKey(); void onClearKey();

} private OnKeyPressListener mOnkeyPressListener; public void setOnKeyPressListener(OnKeyPressListener li) {

mOnkeyPressListener = li;

} @Override

public void onKey(int i, int[] ints) { if (i == Keyboard.KEYCODE_DELETE && mOnkeyPressListener != null) { //删除数据回调

mOnkeyPressListener.onDeleteKey();

} else if (i == Keyboard.KEYCODE_CANCEL && mOnkeyPressListener != null) { //清除数据

mOnkeyPressListener.onClearKey();

} else if (i != KEYCODE_EMPTY) { //添加数据回调

mOnkeyPressListener.onInertKey(Character.toString((char) i));

}

} @Override

public void onPress(int i) {

} @Override

public void onRelease(int i) {

} @Override

public void onText(CharSequence charSequence) {

} @Override

public void swipeRight() { super.swipeRight();

} @Override

public void swipeDown() { super.swipeDown();

} @Override

public void swipeLeft() { super.swipeLeft();

} @Override

public void swipeUp() { super.swipeUp();

} /*****************************************************************/

private int sp2px(float spValue) { final float fontScale = getContext().getResources().getDisplayMetrics().scaledDensity; return (int) (spValue * fontScale + 0.5f);

}

3、Activity 中实现public class MainActivity extends AppCompatActivity { private EditText mEditText; private NumKeyView mKeyView; private LinearLayout mLinearlayout; private PopupWindow mPop; private View mPopView; private RelativeLayout mRelativeLayout; private Handler mhandler = new Handler() { @Override

public void handleMessage(Message msg) { super.handleMessage(msg);

mPop.dismiss();

mKeyView.setVisibility(View.VISIBLE);

;

}

}; @Override

protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);

mEditText = findViewById(R.id.et);

mLinearlayout = findViewById(R.id.ln);

mPop = new PopupWindow();

mPopView = LayoutInflater.from(getApplicationContext()).inflate(R.layout.keyboard_pop, null);

mPop.setContentView(mPopView);

mPop.setTouchable(true);

mPop.setFocusable(true);

mPop.setBackgroundDrawable(new ColorDrawable());

mPop.setWidth(ViewGroup.LayoutParams.MATCH_PARENT);

mPop.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);

mPop.setAnimationStyle(R.style.PopWindowstyle);

mKeyView = mPopView.findViewById(R.id.keyboardview);

mRelativeLayout = mPopView.findViewById(R.id.iv_hide);

mRelativeLayout.setOnClickListener(new View.OnClickListener() { @Override

public void onClick(View v) {

mPop.dismiss();

}

});

mEditText.setOnTouchListener(new View.OnTouchListener() { public boolean onTouch(View v, MotionEvent event) { int inputType = mEditText.getInputType();

mEditText.setInputType(InputType.TYPE_NULL);// 让系统键盘不弹出

//点击按钮显示键盘

mPop.showAtLocation(mLinearlayout, Gravity.BOTTOM, 0, 0);

mEditText.setInputType(inputType); //设定光标位置

Selection.setSelection(mEditText.getText(), mEditText.getText().length()); return false;

}

});

//设置回调，并进行文本的插入与删除

mKeyView.setOnKeyPressListener(new NumKeyView.OnKeyPressListener() { @Override

public void onInertKey(String text) {

mEditText.append(text);

} @Override

public void onDeleteKey() { int last = mEditText.getText().length(); if (last > 0) { //删除最后一位

mEditText.getText().delete(last - 1, last);

}

} @Override

public void onClearKey() {

mEditText.getText().clear();

}

});

}

5、keyboard_pop.xml<?xml version="1.0" encoding="utf-8"?>

xmlns:app="http://schemas.android.com/apk/res-auto"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:background="@color/c00000000"

android:orientation="vertical">

android:id="@+id/iv_hide"

android:layout_width="80dp"

android:layout_height="44dp"

android:layout_alignParentRight="true"

android:layout_marginRight="8dp"

android:background="@color/cE7EDF5">

android:layout_width="36dp"

android:layout_height="36dp"

android:layout_centerHorizontal="true"

android:layout_centerVertical="true"

android:class="lazyload" src="https://i-blog.csdnimg.cn/blog_migrate/e7eed6b9855ebeb16e66074cdaf9c0fa.png" data-original="@drawable/ic_calculator_up" />

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_below="@id/iv_hide"

android:background="@color/cCDCDCD">

android:id="@+id/keyboardview"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_marginLeft="17dp"

android:layout_marginTop="18dp"

android:layout_marginRight="17dp"

android:layout_marginBottom="20dp"

android:focusable="true"