Android EditText 设置了密码类型，怎么修改文本密码的间距

Android EditText 设置密码类型时，默认的间距是不可修改的。但是你可以通过自定义一个 PasswordTransformationMethod 的子类来实现修改密码间距的功能。

示例代码如下：

public class CustomPasswordTransformationMethod extends PasswordTransformationMethod {
    private float mSpacing; // 密码间隔

    public CustomPasswordTransformationMethod(float spacing) {
        mSpacing = spacing;
    }

    @Override
    public CharSequence getTransformation(CharSequence source, View view) {
        CharSequence transformation = super.getTransformation(source, view);
        if (transformation != null && transformation.length() > 0) {
            SpannableStringBuilder spannable = new SpannableStringBuilder(transformation);
            // 设置密码间隔
            for (int i = 0; i < transformation.length() - 1; i++) {
                spannable.setSpan(new CustomSpaceSpan((int) mSpacing), i, i + 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
            }
            return spannable;
        }
        return transformation;
    }

    private static class CustomSpaceSpan extends ReplacementSpan {
        private int mWidth;

        CustomSpaceSpan(int width) {
            mWidth = width;
        }

        @Override
        public int getSize(Paint paint, CharSequence text, int start, int end, Paint.FontMetricsInt fm) {
            return mWidth;
        }

        @Override
        public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top, int y, int bottom, Paint paint) {
        }
    }
}

使用示例：

float spacing = 20; // 间隔为20px
EditText editText = findViewById(R.id.edit_text);
editText.setTransformationMethod(new CustomPasswordTransformationMethod(spacing));

这样就可以实现修改密码间距的功能了。