https://github.com/mylhyl/Android-CircleDialog/issues/32#issuecomment-451403929

Author: mylhyl

app/src/main/java/com/mylhyl/circledialog/sample/MainActivity.java

@@ -169,9 +169,10 @@ public void onItemClick(BaseQuickAdapter adapter, View view, int position) {
                         .setInputHeight(300)
                         .setInputShowKeyboard(true)
                         .setInputEmoji(true)
-                        .setInputCounter(50)
+                        .setInputCounter(10)
 //                        .setInputCounter(20, (maxLen, currentLen) -> maxLen - currentLen + "/" + maxLen)
                         .configInput(params -> {
+//                            params.isCounterAllEn = true;
 //                            params.padding = new int[]{30, 30, 30, 30};
 //                                params.inputBackgroundResourceId = R.drawable.bg_input;
 //                                params.gravity = Gravity.CENTER;

circledialog/src/main/java/com/mylhyl/circledialog/MaxLengthEnWatcher.java

@@ -0,0 +1,74 @@
+package com.mylhyl.circledialog;
+
+import android.text.Editable;
+import android.text.TextUtils;
+import android.text.TextWatcher;
+import android.widget.EditText;
+import android.widget.TextView;
+
+/**
+ * 中文1字符
+ * Created by hupei on 2019/01/07 09:36.
+ */
+public class MaxLengthEnWatcher implements TextWatcher {
+    private int mMaxLen;
+    private EditText mEditText;
+    private TextView mTvCounter;
+    private CircleParams mParams;
+
+    public MaxLengthEnWatcher(int maxLen, EditText editText, TextView textView, CircleParams params) {
+        this.mMaxLen = maxLen;
+        this.mEditText = editText;
+        this.mTvCounter = textView;
+        this.mParams = params;
+        if (mEditText != null) {
+            String defText = mEditText.getText().toString();
+            int currentLen = maxLen - defText.length();
+            if (mParams.inputCounterChangeListener != null) {
+                String counterText = mParams.inputCounterChangeListener
+                        .onCounterChange(maxLen, currentLen);
+                mTvCounter.setText(counterText == null ? "" : counterText);
+            } else {
+                mTvCounter.setText(String.valueOf(currentLen));
+            }
+        }
+    }
+
+    @Override
+    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+
+    }
+
+    @Override
+    public void onTextChanged(CharSequence s, int start, int before, int count) {
+
+    }
+
+    @Override
+    public void afterTextChanged(Editable editable) {
+        int editStart = mEditText.getSelectionStart();
+        int editEnd = mEditText.getSelectionEnd();
+        // 先去掉监听器，否则会出现栈溢出
+        mEditText.removeTextChangedListener(this);
+        if (!TextUtils.isEmpty(editable)) {
+            //循环删除多出的字符
+            while (editable.toString().length() > mMaxLen) {
+                editable.delete(editStart - 1, editEnd);
+                editStart--;
+                editEnd--;
+            }
+        }
+        int currentLen = mMaxLen - editable.toString().length();
+        if (mParams.inputCounterChangeListener != null) {
+            String counterText = mParams.inputCounterChangeListener
+                    .onCounterChange(mMaxLen, currentLen);
+            mTvCounter.setText(counterText == null ? "" : counterText);
+        } else {
+            mTvCounter.setText(String.valueOf(currentLen));
+        }
+
+        mEditText.setSelection(editStart);
+        // 恢复监听器
+        mEditText.addTextChangedListener(this);
+    }
+}

circledialog/src/main/java/com/mylhyl/circledialog/MaxLengthWatcher.java

@@ -7,6 +7,7 @@
 import android.widget.TextView;
 
 /**
+ * 中文2字符
  * Created by hupei on 2018/11/1 11:19.
  */
 public class MaxLengthWatcher implements TextWatcher {

circledialog/src/main/java/com/mylhyl/circledialog/params/InputParams.java

@@ -111,6 +111,10 @@ public InputParams[] newArray(int size) {
      * 是否禁止输入表情
      */
     public boolean isEmojiInput;
+    /**
+     * 输入限制计数器中文是否算1个字符
+     */
+    public boolean isCounterAllEn;
 
     public InputParams() {
     }
@@ -137,6 +141,7 @@ protected InputParams(Parcel in) {
         this.counterColor = in.readInt();
         this.showSoftKeyboard = in.readByte() != 0;
         this.isEmojiInput = in.readByte() != 0;
+        this.isCounterAllEn = in.readByte() != 0;
     }
 
     @Override
@@ -167,5 +172,6 @@ public void writeToParcel(Parcel dest, int flags) {
         dest.writeInt(this.counterColor);
         dest.writeByte(this.showSoftKeyboard ? (byte) 1 : (byte) 0);
         dest.writeByte(this.isEmojiInput ? (byte) 1 : (byte) 0);
+        dest.writeByte(this.isCounterAllEn ? (byte) 1 : (byte) 0);
     }
 }

circledialog/src/main/java/com/mylhyl/circledialog/view/BodyInputView.java

@@ -12,6 +12,7 @@
 
 import com.mylhyl.circledialog.CircleParams;
 import com.mylhyl.circledialog.EmojiFilter;
+import com.mylhyl.circledialog.MaxLengthEnWatcher;
 import com.mylhyl.circledialog.MaxLengthWatcher;
 import com.mylhyl.circledialog.params.DialogParams;
 import com.mylhyl.circledialog.params.InputParams;
@@ -61,7 +62,8 @@ private void init(Context context, CircleParams params) {
         mEditText.setTextColor(inputParams.textColor);
         mEditText.addOnLayoutChangeListener(new OnLayoutChangeListener() {
             @Override
-            public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {
+            public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft
+                    , int oldTop, int oldRight, int oldBottom) {
                 int height = v.getHeight();
                 if (inputParams.inputHeight > height) {
                     mEditText.setHeight(inputParams.inputHeight);
@@ -113,9 +115,13 @@ public void onLayoutChange(View v, int left, int top, int right, int bottom, int
             mTvCounter.setTextSize(INPUT_COUNTER__TEXT_SIZE);
             mTvCounter.setTextColor(inputParams.counterColor);
 
-            mEditText.addTextChangedListener(new MaxLengthWatcher(inputParams.maxLen
-                    , mEditText, mTvCounter, params));
-
+            if (inputParams.isCounterAllEn) {
+                mEditText.addTextChangedListener(new MaxLengthEnWatcher(inputParams.maxLen
+                        , mEditText, mTvCounter, params));
+            } else {
+                mEditText.addTextChangedListener(new MaxLengthWatcher(inputParams.maxLen
+                        , mEditText, mTvCounter, params));
+            }
             addView(mTvCounter, layoutParamsCounter);
         }