android @人功能实现，整体删除

左手的ㄟ右手 2024-04-17 18:56 47阅读 0赞

实现@人功能，整体删除和添加，不可修改

代码地址：  
[https://github.com/GodisGod/test/tree/master][https_github.com_GodisGod_test_tree_master]

其中是根据Id来判断是不是同一个人的，图中的两个“王五29”一个id是29一个id是30  
大家可以参考代码，来实现自己的需求，所有逻辑都已经封装在了一个AtEdittext的类中  
AtEdittext类是自定义的继承了AppCompatEditText的一个子类，具体逻辑大家可以看代码哦 (*^▽ ^*)

![@人功能][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JhaWR1XzMxMDkzMTMz_size_16_color_FFFFFF_t_70]

public class AtEdittext extends AppCompatEditText { 
    
        public static final int CODE_PERSON = 0x05;
        public static final String KEY_CID = "key_id";
        public static final String KEY_NAME = "key_name";
        List<DynamicDrawableSpan> spans = new ArrayList<>();
    
        private int curAtLength = 0;//at人的字符数量
    
        private final int MAX_NUM = 10;
    
        /** * 存储@的cid、name对,需要使用有序map */
        private Map<String, Person> personMap = new LinkedHashMap<>();
    
        public AtEdittext(Context context) { 
            this(context, null);
        }
    
        public AtEdittext(Context context, AttributeSet attrs) { 
            this(context, attrs, 0);
        }
    
        public AtEdittext(Context context, AttributeSet attrs, int defStyleAttr) { 
            super(context, attrs, defStyleAttr);
            setFilters(new InputFilter[]{ new MyInputFilter()});
            requestFocus();
    
        }
    
        public int checkAtLength() { 
    
            curAtLength = 0;
    
            for (Person m :
                    personMap.values()) { 
                curAtLength = curAtLength + m.getName().length();
            }
    
            Log.i("LHD", "at人的字符长度 = " + curAtLength);
    
            return curAtLength;
        }
    
        /** * 识别输入框的是不是@符号 */
        private class MyInputFilter implements InputFilter { 
            @Override
            public CharSequence filter(CharSequence source, int start, int end,
                                       Spanned dest, int dstart, int dend) { 
                if (source.toString().equalsIgnoreCase("@")
                        || source.toString().equalsIgnoreCase("＠")) { 
                    Log.i("LHD", "AtEdittext 111");
                    resetSpan(getText());
                    if (onJumpListener != null) { 
                        Log.i("LHD", "AtEdittext 222");
                        onJumpListener.goToChooseContact(CODE_PERSON);
                    }
                }
                return source;
            }
        }
    
        /** * 设置span * * @param keyId 人员的id * @param nameStr 人员的名字 */
        private void setImageSpan(String keyId, String nameStr) { 
            int startIndex = getSelectionStart();//光标的位置
            int endIndex = startIndex + nameStr.length();//字符结束的位置
    // Log.i("LHD", "setImageSpan startIndex = " + startIndex + " endIndex = " + endIndex + " " + getText().toString());
    
            Person lBean = new Person();
            lBean.setId(keyId);
            lBean.setName("@" + nameStr);
            lBean.setStartIndex(startIndex);
            lBean.setEndIndex(endIndex);
    
            personMap.put(keyId, lBean);
    
            //插入要添加的字符，此处是为了给span占位
            getText().insert(startIndex, "@" + nameStr);
            //1、使用mEditText构造一个SpannableString
            SpannableString ss = new SpannableString(getText().toString());
            //2、遍历添加span
            for (Person p : personMap.values()) { 
                Log.i("LHD", "==========每一个人的位置 start = " + p.getStartIndex() + " end = " + p.getEndIndex() + " id = " + p.getId() + " name = " + p.getName() + " edittext.tostring = " + getText().toString());
                LDSpan dynamicDrawableSpan = new LDSpan(getContext(), p);
    // ForegroundColorSpan foregroundColorSpan = new ForegroundColorSpan(Color.RED);
                spans.add(dynamicDrawableSpan);
    
                // 把取到的要@的人名，用DynamicDrawableSpan代替,使用这个span是为了防止在@人名中间插入任何字符
                //注意start和end的范围是前闭后开即[start,end)所以end要加1
                ss.setSpan(dynamicDrawableSpan, p.getStartIndex(), p.getEndIndex() + 1,
                        SpannableString.SPAN_EXCLUSIVE_EXCLUSIVE);
            }
    
            setTextKeepState(ss);
    
        }
    
        /** * 重新计算每一个span的位置重置map * * @param editable 传入需要识别的editable */
        private void resetSpan(Editable editable) { 
            if (editable == null) return;
    // Log.i("LHD", "===================resetSpan=================");
            LDSpan[] spans = editable.getSpans(0, getText().length(), LDSpan.class);
    
            personMap.clear();
    
            for (LDSpan s : spans) { 
                Log.i("LHD resetSpan ", " start = " + getText().getSpanStart(s) + " end = " + getText().getSpanEnd(s));
                Person p = s.getPerson();
                p.setStartIndex(editable.getSpanStart(s));
                p.setEndIndex(editable.getSpanEnd(s) - 1);
                personMap.put(s.getPerson().getId(), s.getPerson());
            }
    
            Log.i("LHD resetSpan ", "spans.length = " + spans.length + " " + personMap.size());
        }
    
        private OnJumpListener onJumpListener;
    
        public interface OnJumpListener { 
            void goToChooseContact(int requestCode);
        }
    
        //对外方法
        public void setOnJumpListener(OnJumpListener onJumpListener) { 
            this.onJumpListener = onJumpListener;
        }
    
        public void handleResult(int requestCode, int resultCode, Intent data) { 
            if (requestCode == CODE_PERSON && resultCode == Activity.RESULT_OK) { 
    
                String keyId = data.getStringExtra(KEY_CID);
                String keyId2 = data.getExtras().getString(KEY_CID);
                Bundle bundle = data.getExtras();
    
                String nameStr = data.getStringExtra(KEY_NAME);
    
                data.getBundleExtra("");
    
                Log.i("DDD", "keyId = " + keyId + " keyId2 = " + keyId2 + " nameStr = " + nameStr);
                if (TextUtils.isEmpty(keyId) || TextUtils.isEmpty(nameStr)) return;
                //1、判断是否已经添加过，如果添加过则删除@符号并返回
                //找到当前的光标位置,也就是输入@符号的位置
                int curIndex = getSelectionStart();
                if (curIndex >= 1) { 
                    //删除@符号
                    getText().replace(curIndex - 1, curIndex, "");
                }
    
                if (personMap.containsKey(keyId)) { 
                    //根据id判断，如果已经添加过则不做任何操作，直接返回
                    return;
                } else { 
                    //2、没有添加过则构造span，添加到Edittext中
                    setImageSpan(keyId, nameStr);
                }
            }
        }
    
        //上传需要的id值
        public String getServiceId() { 
    
            List<String> ids = new ArrayList<>();
            String upIds = "";
            resetSpan(getText());
            for (Person p : personMap.values()) { 
                ids.add(p.getId());
                upIds = upIds + p.getId() + "|";
            }
            Log.i("LHD", "要上传的Id集合 = " + upIds);
    
            return upIds;
        }
    
    
        public boolean checkPublishContent() { 
            if (!TextUtils.isEmpty(getText().toString())) { 
                int contentLength = getText().toString().length();
                int atLength = checkAtLength();
                if (contentLength - atLength > 200) { 
                    Toast.makeText(getContext(), "最多输入200字", Toast.LENGTH_SHORT).show();
                    return false;
                }
                return true;
            } else { 
                Toast.makeText(getContext(), "输入内容为空", Toast.LENGTH_SHORT).show();
                return false;
            }
        }
    
    }

[https_github.com_GodisGod_test_tree_master]: https://github.com/GodisGod/test/tree/master
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JhaWR1XzMxMDkzMTMz_size_16_color_FFFFFF_t_70]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/17/cdb5a8f4095f462cae7f9707d7929bbb.jpg