备份Edittext编辑框字数限制ui以及逻辑

Posted 2022-12-08 六道对穿肠

ui布局

        etContent.addTextChangedListener(new TextWatcher() 
            //记录输入的字数
            private CharSequence enterWords;
            private int selectionStart;
            private int selectionEnd;
            private int enteredWords;

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) 
            

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) 
                //实时记录输入的字数
                enterWords = s;
            

            @Override
            public void afterTextChanged(Editable s) 
                //已输入字数
                enteredWords = wordLimitNum - s.length();
                //TextView显示剩余字数
                tvEndNumber.setText(wordLimitNum - enteredWords + "/" + wordLimitNum);
            
        );
        

edittext_background_number.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <corners

        android:radius="6dp" />
    <solid android:color="@color/color_F5F5F5"/>
    <stroke
        android:width="1dp"
        android:color="#fff2f3f7" />

</shape>

监听字数

      //记录字数上限
        int wordLimitNum = 50;
        etContent.addTextChangedListener(new TextWatcher() 
            //记录输入的字数
            private CharSequence enterWords;
            private int selectionStart;
            private int selectionEnd;
            private int enteredWords;

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) 
            

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) 
                //实时记录输入的字数
                enterWords = s;
            

            @Override
            public void afterTextChanged(Editable s) 
                //已输入字数
                enteredWords = wordLimitNum - s.length();
                //TextView显示剩余字数
                tvEndNumber.setText(50 - enteredWords + "/50");
                selectionStart = etContent.getSelectionStart();
                selectionEnd = etContent.getSelectionEnd();
                if (enterWords.length() > wordLimitNum) 
                    //删除多余输入的字（不会显示出来）
                    s.delete(selectionStart - 1, selectionEnd);
                    int tempSelection = selectionEnd;
                    etContent.setText(s);
                    //设置光标在最后
                    etContent.setSelection(tempSelection);
                
            
        );

键盘遮挡问题:

android:windowSoftInputMode="adjustPan"