ZIP末尾添加comment长度，方便Android读取（附Android读取示例)

MCPTool.php

@@ -8,6 +8,7 @@
     if ($argc != 3) {
         echo 'example: php MCPTool.php xx.apk comment';echo PHP_EOL;exit;
     }
+
     $path    = trim($argv[1]);
     $comment = trim($argv[2]);
 
@@ -41,17 +42,19 @@ static public function write($path, $comment){
             $fp =  fopen($path , 'r+'); //这里注意不要使用rw
             //ZIP摘要结构 参考http://pingguohe.net/2016/03/21/Dynimac-write-infomation-into-apk.html
             $seek =  fseek($fp, -2, SEEK_END); //文件指针移到末尾2个字节 zip摘要长度信息占2个字节
-            $data = pack("v", strlen($comment)); //always 16 bit, little endian byte order
 
+            $len = strlen($comment);
+            $data = pack("v", $len + strlen($len)); //always 16 bit, little endian byte order
             $ret1 = fwrite($fp, $data);//返回写入的字符数
 
             if ($ret1 != 2) {
                 return 'write length error';
             }
 
             $ret2 = fwrite($fp, $comment);
+            $ret3 = fwrite($fp, pack("v", $len));
 
-            if ($ret2 === false) {
+            if ($ret2 === false || $ret3 === false) {
                 return 'write comment error';
             }
 
@@ -61,4 +64,57 @@ static public function write($path, $comment){
         }
     }
 
+/*
+    //以下为JAVA代码
+
+    //android读取php写入zip的comment
+
+    public static String readApk(Context context) throws IOException {
+
+        String path = context.getPackageCodePath();
+
+        System.out.println("path=" + path);
+
+        File file = new File(path);
+
+        byte[] bytes = null;
+        try {
+            RandomAccessFile accessFile = new RandomAccessFile(file, "r");
+            long index = accessFile.length();
+
+            bytes = new byte[2];
+            index = index - bytes.length;
+            accessFile.seek(index);
+            accessFile.readFully(bytes);
+
+            int contentLength = stream2Short(bytes, 0);
+
+            System.out.println("content length=" + contentLength);
+
+            if (contentLength == 0){
+                return null;
+            }
+
+            bytes = new byte[contentLength];
+            index = index - bytes.length;
+            accessFile.seek(index);
+            accessFile.readFully(bytes);
+
+            return new String(bytes, "utf-8");
+        } catch (FileNotFoundException e) {
+            e.printStackTrace();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    private static short stream2Short(byte[] stream, int offset) {
+        ByteBuffer buffer = ByteBuffer.allocate(2);
+        buffer.order(ByteOrder.LITTLE_ENDIAN);
+        buffer.put(stream[offset]);
+        buffer.put(stream[offset + 1]);
+        return buffer.getShort(0);
+    }
+ */
  ?>