效果.gif
<LinearLayout
android:layout_width="match_parent"
android:layout_height="@dimen/dp_40"
android:layout_marginLeft="@dimen/dp_12"
android:layout_marginRight="@dimen/dp_12"
android:layout_marginTop="@dimen/dp_12"
android:background="@drawable/bg_white"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:gravity="center"
android:paddingLeft="@dimen/dp_10"
android:text="消費金額："
android:textColor="@color/title_color"
android:textSize="@dimen/sp_14" />
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/tv_buf"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginRight="@dimen/dp_10"
android:gravity="center|right"
android:text="￥"
android:textColor="@color/shop_guige"
android:textSize="@dimen/sp_20"
android:visibility="gone" />
<EditText
android:id="@+id/dealMoney_et"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:background="@null"
android:gravity="right|center"
android:inputType="number|numberDecimal"
android:paddingLeft="@dimen/dp_5"
android:paddingRight="@dimen/dp_10"
android:textColor="@color/shop_guige"
//@null表示和文字顏色一樣
android:textCursorDrawable="@null"
android:textSize="@dimen/sp_14" />
<TextView
android:id="@+id/tv_hint"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginRight="8dp"
android:background="@null"
android:gravity="right|center_vertical"
android:text="@string/詢問服務(wù)員后輸入"
android:textColor="@color/third_txt_color"
android:textSize="@dimen/sp_14" />
</FrameLayout>
</LinearLayout>
screenshot-1510135622138.jpg
1.輸入過濾器InputFilter約束用戶輸入
public class CashierInputFilter implements InputFilter {
Pattern mPattern;
//輸入的最大金額
private static final int MAX_VALUE = 100000;
//小數(shù)點后的位數(shù)
private static final int POINTER_LENGTH = 2;
private static final String POINTER = ".";
private static final String ZERO = "0";
//只能輸入數(shù)字和小數(shù)點
public CashierInputFilter() {
mPattern = Pattern.compile("([0-9]|\\.)*");
}
/**
* @param source 新輸入的字符串
* @param start 新輸入的字符串起始下標，一般為0
* @param end 新輸入的字符串終點下標，一般為source長度-1
* @param dest 輸入之前文本框內(nèi)容
* @param dstart 原內(nèi)容起始坐標，一般為0
* @param dend 原內(nèi)容終點坐標，一般為dest長度-1
* @return 輸入內(nèi)容
*/
@Override
public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
String sourceText = source.toString();
String destText = dest.toString();
//驗證刪除等按鍵
if (TextUtils.isEmpty(sourceText)) {
return "";
}
Matcher matcher = mPattern.matcher(source);
//已經(jīng)輸入小數(shù)點的情況下，只能輸入數(shù)字
if (destText.contains(POINTER)) {
if (!matcher.matches()) {
return "";
} else {
if (POINTER.equals(source.toString())) { //只能輸入一個小數(shù)點
return "";
}
}
//驗證小數(shù)點精度，保證小數(shù)點后只能輸入兩位
int index = destText.indexOf(POINTER);
int length = dend - index;
if (length > POINTER_LENGTH) {
return dest.subSequence(dstart, dend);
}
} else {
/**
* 沒有輸入小數(shù)點的情況下，只能輸入小數(shù)點和數(shù)字
* 1. 首位不能輸入小數(shù)點
* 2. 如果首位輸入0，則接下來只能輸入小數(shù)點了
*/
if (!matcher.matches()) {
return "";
} else {
if ((POINTER.equals(source.toString())) && TextUtils.isEmpty(destText)) { //首位不能輸入小數(shù)點
return "";
} else if (!POINTER.equals(source.toString()) && ZERO.equals(destText)) { //如果首位輸入0，接下來只能輸入小數(shù)點
return "";
}
}
}
//驗證輸入金額的大小
double sumText = Double.parseDouble(destText + sourceText);
if (sumText > MAX_VALUE) {
return dest.subSequence(dstart, dend);
}
return dest.subSequence(dstart, dend) + sourceText;
}
}
在Activity中的代碼
InputFilter[] filters = {new CashierInputFilter()};
etDealMoney.setFilters(filters);
NoConcessionsMoneyEd.setFilters(filters);
/**
* 監(jiān)聽消費金額的輸入
*/
dealMoneyTv.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
conPrice = s.toString();
int bg = TextUtils.isEmpty(s) ? R.drawable.selector_tuan__offer_to_pay_butn_bg : R.drawable.tuan_red_bag;
SubmitButtonTv.setBackground(getResources().getDrawable(bg));
SubmitButtonTv.setEnabled(TextUtils.isEmpty(s) ? false : true);
dealWithMone(conPrice, notEnjoy);
}
@Override
public void afterTextChanged(Editable s) {
if (s.length() > 0) {
//設(shè)置不享受優(yōu)惠編輯框可以編輯
NoConcessionsMoneyEd.setMoneyIsEmpty(false);
//顯示消費金額的￥
tvBuf.setVisibility(View.VISIBLE);
//獲取EditText內(nèi)容長度
float textWidth = getTextWidth(dealMoneyTv);
//通過setX(float x)讓￥往左移動
tvBuf.setX(-textWidth);
//隱藏hint
tvHint.setVisibility(View.GONE);
} else {
NoConcessionsMoneyEd.setMoneyIsEmpty(true);
tvBuf.setVisibility(View.GONE);
tvHint.setVisibility(View.VISIBLE);
}
}
/**
* 監(jiān)聽不享受優(yōu)惠金額的輸入
*/
NoConcessionsMoneyEd.setOnFocusChangeListener((v, hasFocus) -> {
//不享受優(yōu)惠金額的焦點
noconcessionsFocus = hasFocus;
});
NoConcessionsMoneyEd.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
//不享受優(yōu)惠金額
notEnjoy = s.toString();
if (!TextUtils.isEmpty(conPrice)) {
dealWithMone(conPrice, notEnjoy);
}
}
@Override
public void afterTextChanged(Editable s) {
if (s.length() > 0) {
//不享受優(yōu)惠金額￥顯示
tvSymbol.setVisibility(View.VISIBLE);
//獲取內(nèi)容長度
float textWidth = getTextWidth(NoConcessionsMoneyEd);
tvSymbol.setX(-textWidth);
} else {
tvSymbol.setVisibility(View.GONE);
}
}
});
不享受優(yōu)惠金額這里使用了自定義EditText
public class MyEditText extends EditText {
/**
* 消費金額是否為空
* 默認為true
*/
private boolean isEmpty = true;
public MyEditText(Context context) {
super(context);
}
public MyEditText(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MyEditText(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
return new InputConnecttion(super.onCreateInputConnection(outAttrs), false);
}
/**
* 消費金額是否為空
*
* @param isEmpty
*/
public void setMoneyIsEmpty(boolean isEmpty) {
this.isEmpty = isEmpty;
}
class InputConnecttion extends InputConnectionWrapper implements
InputConnection {
public InputConnecttion(InputConnection target, boolean mutable) {
super(target, mutable);
}
/**
* 對輸入的內(nèi)容進行攔截
*
* @param text
* @param newCursorPosition
* @return
*/
@Override
public boolean commitText(CharSequence text, int newCursorPosition) {
// 當消費金額為空的時候進行攔截
if (isEmpty) {
ToastUtil.show("請先填寫消費金額");
return false;
}
return super.commitText(text, newCursorPosition);
}
@Override
public boolean sendKeyEvent(KeyEvent event) {
return super.sendKeyEvent(event);
}
@Override
public boolean setSelection(int start, int end) {
return super.setSelection(start, end);
}
}
}
/**
* 獲取EditText的內(nèi)容寬度
* @param editText
* @return
*/
private float getTextWidth(EditText editText) {
TextPaint mTextPaint = editText.getPaint();
return mTextPaint.measureText(editText.getText().toString());
}
