如何通过android中的软键盘以编程方式将我的EditText输入限制为一些特殊字符，如反斜杠(/)，tild(〜)等 [英] How can restrict my EditText input to some special character like backslash(/),tild(~) etc by soft keyboard in android programmatically

问题描述

我正在开发键盘应用程序，但遇到了问题.我想以编程方式在 android 的 EditText 中限制/阻止软键盘中的某些特殊字符.

I am developing an application for keyboard, but i am geting an issue. I want to restrict/block some special character from soft keyboard in EditText in android programmatically.

那么，有什么办法可以限制在 android 的编辑文本中输入任何特殊字符.

So, Is there any way i can restrict any special character input in edit text in android.

如果有人有想法，请回复.

If anyone have idea,Please reply.

提前致谢.

推荐答案

试试这个可能对你有用

public class MainActivity extends Activity {

    private EditText editText;
    private String blockCharacterSet = "~#^|$%&*!";

    private InputFilter filter = new InputFilter() {

        @Override
        public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {

            if (source != null && blockCharacterSet.contains(("" + source))) {
                return "";
            }
            return null;
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        editText = (EditText) findViewById(R.id.editText);
        editText.setFilters(new InputFilter[] { filter });
    }

}

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