全志代码首次提交

2025-11-06 10:55:48 +08:00
commit fc767791f3
299 changed files with 26337 additions and 0 deletions
--- a/mylibrary/src/main/java/com/android/util/MaxLengthWatcher.java
+++ b/mylibrary/src/main/java/com/android/util/MaxLengthWatcher.java
@@ -0,0 +1,64 @@
+package com.android.util;
+
+import android.text.Editable;
+import android.text.Selection;
+import android.text.TextWatcher;
+import android.widget.EditText;
+
+/*
+ * 监听输入内容是否超出最大长度，并设置光标位置
+ * */
+public class MaxLengthWatcher implements TextWatcher {
+
+    private int maxLen = 0;
+    private EditText editText = null;
+
+
+    public MaxLengthWatcher(int maxLen, EditText editText) {
+        this.maxLen = maxLen;
+        this.editText = editText;
+    }
+
+    public MaxLengthWatcher() {
+
+    }
+
+    public void afterTextChanged(Editable arg0) {
+        // TODO Auto-generated method stub
+
+    }
+
+    public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
+                                  int arg3) {
+        // TODO Auto-generated method stub
+
+    }
+
+    public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
+        // TODO Auto-generated method stub
+        Editable editable = editText.getText();
+        int len = editable.length();
+
+        if(len > maxLen)
+        {
+            int selEndIndex = Selection.getSelectionEnd(editable);
+            String str = editable.toString();
+            //截取新字符串
+            String newStr = str.substring(0,maxLen);
+            editText.setText(newStr);
+            editable = editText.getText();
+
+            //新字符串的长度
+            int newLen = editable.length();
+            //旧光标位置超过字符串长度
+            if(selEndIndex > newLen)
+            {
+                selEndIndex = editable.length();
+            }
+            //设置新光标所在的位置
+            Selection.setSelection(editable, selEndIndex);
+
+        }
+    }
+
+}