android - 编辑文本中的波斯数字在我打字时不起作用

Question

我希望在 edittext 中键入数字时显示波斯语或阿拉伯语数字而不是英语数字，“它与方法 settext() 配合使用效果很好，但在我输入时不起作用。”我使用此代码显示波斯数字，TextView 和 Button 工作正常，但在 EditText 中打字时不起作用!

public class FormatHelper {

private static String[] persianNumbers = new String[]{"۰", "۱", "۲", "۳", "۴", "۵", "۶", "۷", "۸", "۹"};

public static String toPersianNumber(String text) {
    if (text.isEmpty())
        return "";
    String out = "";
    int length = text.length();
    for (int i = 0; i < length; i++) {
        char c = text.charAt(i);
        if ('0' <= c && c <= '9') {
            int number = Integer.parseInt(String.valueOf(c));
            out += persianNumbers[number];
        } else if (c == '٫') {
            out += '،';
        } else {
            out += c;
        }
    }
    return out;
  }

public class LoginActivity extends AppCompatActivity {

myEditText myEditText;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.login_page);

    myEditText = findViewById(R.id.user_pnumber);

    myEditText.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            String s = FormatHelper.toPersianNumber(charSequence.toString());
            Toast.makeText(LoginActivity.this, s, Toast.LENGTH_SHORT).show();
            myEditText.setText(s);
        }

        @Override
        public void afterTextChanged(Editable editable) {

        }
    });

}

我认为必须使用 addTextChangedListener

更新我收到强制关闭应用程序的错误:

FATAL EXCEPTION: main
                                                                    java.lang.StackOverflowError
                                                                        at android.text.SpannableStringBuilder.getTextRunAdvances(SpannableStringBuilder.java:1212)
                                                                        at android.graphics.Paint.getTextRunAdvances(Paint.java:2100)
                                                                        at android.graphics.Paint.getTextRunAdvances(Paint.java:2064)
                                                                        at android.text.TextLine.handleText(TextLine.java:969)
                                                                        at android.text.TextLine.handleRun(TextLine.java:1178)
                                                                        at android.text.TextLine.measureRun(TextLine.java:617)
                                                                        at android.text.TextLine.measure(TextLine.java:480)
                                                                        at android.text.TextLine.metrics(TextLine.java:454)
                                                                        at android.text.Layout.getLineExtent(Layout.java:993)
                                                                        at android.text.Layout.getLineStartPos(Layout.java:519)
                                                                        at android.text.Layout.getHorizontal(Layout.java:856)
                                                                        at android.text.Layout.getHorizontal(Layout.java:827)
                                                                        at android.text.Layout.getPrimaryHorizontal(Layout.java:811)
                                                                        at android.widget.TextView.getFocusedRect(TextView.java:5834)
                                                                        at android.view.FocusFinder.findNextFocus(FocusFinder.java:120)
                                                                        at android.view.FocusFinder.findNextFocus(FocusFinder.java:94)
                                                                        at android.view.FocusFinder.findNextFocus(FocusFinder.java:65)
                                                                        at android.view.ViewGroup.focusSearch(ViewGroup.java:681)
                                                                        at android.view.ViewGroup.focusSearch(ViewGroup.java:683)
                                                                        at android.view.ViewGroup.focusSearch(ViewGroup.java:683)
                                                                        at android.view.ViewGroup.focusSearch(ViewGroup.java:683)
                                                                        at android.view.ViewGroup.focusSearch(ViewGroup.java:683)
                                                                        at android.view.ViewGroup.focusSearch(ViewGroup.java:683)
                                                                        at android.view.ViewGroup.focusSearch(ViewGroup.java:683)
                                                                        at android.view.View.focusSearch(View.java:6547)
                                                                        at android.widget.TextView.onCreateInputConnection(TextView.java:6489)
                                                                        at android.view.inputmethod.InputMethodManager.startInputInner(InputMethodManager.java:1213)
                                                                        at android.view.inputmethod.InputMethodManager.restartInput(InputMethodManager.java:1164)
                                                                        at android.widget.TextView.setText(TextView.java:4231)
                                                                        at android.widget.TextView.setText(TextView.java:4148)
                                                                        at android.widget.EditText.setText(EditText.java:104)
                                                                        at android.widget.TextView.setText(TextView.java:4123)
                                                                        at LoginActivity$2.onTextChanged(LoginActivity.java:76)
                                                                        at android.widget.TextView.sendOnTextChanged(TextView.java:8284)
                                                                        at android.widget.TextView.setText(TextView.java:4314)
                                                                        at android.widget.TextView.setText(TextView.java:4148)
                                                                        at android.widget.EditText.setText(EditText.java:104)
                                                                        at android.widget.TextView.setText(TextView.java:4123)

Answer 1

使用此代码

好的，你需要像 et_change 这样的全局变量

 private boolean et_change = false;

在 TextWatcher 中像下面这样使用它

myEditText.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) {
            if (et_change) {
                et_change = false;
                return;
            }
            et_change = true;


            String s = FormatHelper.toPersianNumber(charSequence.toString());
            myEditText.setText(s);
        }



        @Override
        public void afterTextChanged(Editable s) {

        }
    });

希望对你有帮助