Android(java)自定义文本框实现多种颜色可点击文本显示

布满荆棘的人生 2023-02-08 12:39 11阅读 0赞

应用app 开发需求，一个登录页面就有许多工作需要做，比如 账号认证的提示、验证码按钮的倒计时，以及用户协议隐私协议等各种协议的显示等等。  
本文就针对 用户隐私协议的显示文本进行封装处理，来统一管理app 的各处的协议信息的显示。  
为了好用，本次是使用builder 模式进行的封装，完整代码如下：

import android.graphics.Color;
    import android.text.SpannableString;
    import android.text.Spanned;
    import android.text.TextPaint;
    import android.text.method.LinkMovementMethod;
    import android.text.style.ClickableSpan;
    import android.view.View;
    import android.widget.TextView;
    
    import androidx.annotation.NonNull;
    
    public class TextContentUtil {
        
    
        private final String prefixContent;//前缀
        private final String suffixContent;//后缀
        private final String clickContent;//可点击内容
        private final TextView textView;
        private final SpannableString clickField;
        private final OnFieldClick onFieldClick;
        private final boolean HAS_SUFFIX;
        private final boolean HAS_PREFIX;
        private final boolean HAS_COLOR;
        private final int color;
        private final boolean HAS_UNDERLINE;
    
        public interface OnFieldClick {
        
            void callback(String clickMessage);
        }
    
        private TextContentUtil(Builder builder) {
        
            this.prefixContent = builder.prefixContent;
            this.clickContent = builder.clickContent;
            this.suffixContent = builder.suffixContent;
            this.HAS_PREFIX = builder.HAS_PREFIX;
            this.HAS_SUFFIX = builder.HAS_SUFFIX;
            this.HAS_COLOR = builder.HAS_COLOR;
            this.HAS_UNDERLINE = builder.HAS_UNDERLINE;
            this.clickField = builder.clickField;
            this.textView = builder.textView;
            this.color = builder.color;
            this.onFieldClick = builder.onFieldClick;
        }
    
        public void init() {
        
            clickField.setSpan(new ClickableSpan() {
        
                @Override
                public void onClick(View view) {
        
                    //点击的响应事件
                    onFieldClick.callback(clickContent);
                }
    
                @Override
                public void updateDrawState(@NonNull TextPaint ds) {
        
                    super.updateDrawState(ds);
                    //设置字体颜色和下划线控制
                    if (HAS_COLOR) {
        
                        ds.setColor(color);
                    }
                    ds.setUnderlineText(HAS_UNDERLINE);
                }
            }, 0, clickField.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
            if (HAS_PREFIX) {
        
                this.textView.setText(this.prefixContent);
            }
            this.textView.append(this.clickField);
            if (HAS_SUFFIX) {
        
                this.textView.append(this.suffixContent);
            }
            this.textView.setMovementMethod(LinkMovementMethod.getInstance());//开始响应点击事件
            this.textView.setHighlightColor(Color.TRANSPARENT); //设置点击后的颜色为透明
        }
    
    
        public static class Builder {
        
            private String prefixContent;//前缀
            private String suffixContent;//后缀
            private String clickContent;//可点击内容
            private TextView textView;
            private SpannableString clickField;
            private OnFieldClick onFieldClick;
            private boolean HAS_SUFFIX;
            private boolean HAS_PREFIX;
            private boolean HAS_COLOR;
            private int color;
            private boolean HAS_UNDERLINE;
    
            public Builder setModelPre(boolean HAS_PREFIX) {
        
                this.HAS_PREFIX = HAS_PREFIX;
                return this;
            }
    
            public Builder setModelSuf(boolean HAS_SUFFIX) {
        
                this.HAS_SUFFIX = HAS_SUFFIX;
                return this;
            }
    
            public Builder setModelLine(boolean HAS_UNDERLINE) {
        
                this.HAS_UNDERLINE = HAS_UNDERLINE;
                return this;
            }
    
            public Builder setModelColor(boolean HAS_COLOR) {
        
                this.HAS_COLOR = HAS_COLOR;
                return this;
            }
    
            public Builder setClickFieldColor(int clickFieldColor) {
        
                this.color = clickFieldColor;
                return this;
            }
    
            public Builder setClickContent(String clickContent) {
        
                this.clickContent = clickContent;
                return this;
            }
    
            public Builder setPrefixContent(String prefixContent) {
        
                this.prefixContent = prefixContent;
                return this;
            }
    
            public Builder setSuffixContent(String suffixContent) {
        
                this.suffixContent = suffixContent;
                return this;
            }
    
            public Builder initSingleClickField(OnFieldClick onFieldClick) {
        
                this.onFieldClick = onFieldClick;
                this.clickField = new SpannableString(clickContent);
                return this;
            }
    
            public Builder setTextView(TextView textView) {
        
                this.textView = textView;
                return this;
            }
    
            public TextContentUtil build() {
        
                return new TextContentUtil(this);
            }
        }
    }

使用方式：

tvInfo = fv(R.id.tv_sign_xy);
     TextContentUtil.Builder builder = new TextContentUtil.Builder();
            builder.setModelPre(true)
                    .setPrefixContent("hello")
                    .setModelSuf(true)
                    .setSuffixContent("nihao")
                    .setClickContent("wahaha")
                    .setModelLine(false)
                    .setModelColor(true)
                    .setClickFieldColor(getResources().getColor(R.color.colorTextError))
                    .setTextView(tvInfo)
                    .initSingleClickField(ToastUtil::showToast).build().init();

本人自觉 封装简介程度还有不足，欢迎各位朋友提供优化意见。