键入时在编辑文本中大写每个单词 [英] Capitalize every word in Edit text while typing

问题描述

我想在键入文本时将编辑文本中的每个单词首字母大写.

I want to capitilze every word in edit text while typing.

我的XML:-

<com.project.edittext.AutoFitEditText
                android:id="@+id/txt_name"
                style="@style/scan_text_fields_white_bg"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:digits="@string/validation_accept_all_except_special_char"
                android:fontFamily="sans-serif"
                android:imeOptions="flagNoExtractUi|actionDone"
                android:inputType="textNoSuggestions|textCapWords"
                android:maxLength="50"
                android:paddingBottom="3dp"
                android:paddingLeft="12dp"
                android:paddingRight="0dp"
                android:paddingTop="0dp"
                android:singleLine="true"
                android:textColor="@color/orange"
                />

现在我正在使用

mName.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_FLAG_CAP_WORDS);

但是问题是它不能在某些设备上运行.前LG平板电脑.因此，我决定以编程方式进行此操作.

所以我正在使用以下代码.

So I am using following codes.

public void onTextChanged(CharSequence s, int start, int before, int count) {
                // TODO Auto-generated method stub                   
                String mNameStr=s.toString();
                String finalStr="";
                if(!mNameStr.equals("")) {
                    String[] strArray = mNameStr.split("[\\s']");
                    if (strArray.length > 0) {
                        for (int i = 0; i < strArray.length; i++) {
                            finalStr+=capitalize(strArray[i]);
                        }
                        Logger.d("finalStr==> ", finalStr);
                    }
                }
                mName.setText(finalStr.toString());
            }



private String capitalize(final String line) {
        return Character.toUpperCase(line.charAt(0)) + line.substring(1);
    }

这里我的应用崩溃了.我在调试时发现了问题.问题是onTextChanged没有停止.使它连续执行.任何人都可以帮助我解决我的问题.我想把每个词都大写.请提出任何解决方案.

Here my app getting crash. I found the problem while debugging. Problem is the onTextChanged is not getting stopped. So that it execute continuously. Anyone help me to resolve my problem. I want to capitalize every word. Please suggest any solutions.

推荐答案

代码冻结的原因是onChangeListener会在您setText时立即触发.

The reason your code freezes is that the onChangeListener is triggered as soon as you setText.

如果文本相同，则必须找到一种停止触发的方法.

You'll have to find a way to stop trigering if the text is the same.

为此，您可以使用临时字符串存储prev值，并在每次事件触发时进行比较.这样可以使流程保持一致且不会循环.

For this you can use a temp string to store the prev value and compare each time the event triggers. This will keep the flow to be consistent and not looping.

String prevString = "";

在afterTextChanged

String mNameStr = s.toString();
String finalStr = "";
if (!mNameStr.equals("")) {
 String[] strArray = mNameStr.split("[\\s']");
 if (strArray.length > 0) {
  int i = 0;
  for (i = 0; i < strArray.length - 1; i++) {
   finalStr += capitalize(strArray[i]) + " ";
  }
  finalStr += capitalize(strArray[i]);
  Log.d("finalStr==> ", finalStr);
 }
}
if (!finalStr.equals(prevString)) {
 prevString = finalStr;
 editText.setText(finalStr.toString());
 editText.setSelection(finalStr.length());
}

---

对代码的优化是仅在最后输入的字母位于空格之后才将句子大写.您可以在此处看到它的实现.

---

An optimization to your code is to only capitalize the sentence if the last entered letter is after a space. You can see it implemented here.

editText.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) {

        }

        @Override
        public void afterTextChanged(Editable s) {
            String string = s.toString();
            Log.d("STRING", string + " " + prevString);
            if (string.equals(prevString)) {
                return;
            } else if (string.length() == 0)
                return;
            // 1st character
            else if (string.length() == 1) {
                prevString = string.toUpperCase();
                editText.setText(string.toUpperCase());
                editText.setSelection(string.length());
            }
            // if the last entered character is after a space 
            else if (string.length() > 0 && string.charAt(string.length() - 2) == ' ') {
                string = string.substring(0, string.length() - 1) + Character.toUpperCase(string.charAt(string.length() - 1));
                prevString = string;
                editText.setText(string);
                editText.setSelection(string.length());
            }
        }
    });

但是，上述方法有一个缺点.这不会考虑您更改光标位置并输入文本的情况.

However, there is a down-side to the above method. This will not consider the case where in you change the cursor position and enter text.

PS:您可以使用getSelectionEnd()方法并增强上述方法

PS: you can use getSelectionEnd() method and enhance the above method

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