MTK 平台 ROM 开发中普遍存在手机连接 PC 后，PC 端我的电脑里面，概率将当前手机的名称显示为以前连接过的手机名称的问题。
2035681-2ce76626335039e5.png
2035681-bf1cd9380d29ab6f.png

这里将最近一次基于 N0 的修改分享出来。（此方法也同样适用于M1）

解决方法：

修改 \frameworks\base\media\java\android\mtp\MtpDatabase.java

1、添加导包：

  1. ///START. Fix the display error on PC. By XiaFei, 20170503.
  2. import android.os.SystemProperties;/// M: Added Modification for ALPS00278882
  3. ///import com.mediatek.xlog.SXlog;
  4. ///import com.mediatek.xlog.Xlog;
  5. import java.lang.Integer;
  6. ///END. Fix the display error on PC. By XiaFei, 20170503.

2、添加具体处理代码：

  2. private int getDeviceProperty(int property, long[] outIntValue, char[] outStringValue) {
  3.     /// 此处省略 N 行
  5.     switch (property) {
  6.         case MtpConstants.DEVICE_PROPERTY_SYNCHRONIZATION_PARTNER:
  7.         case MtpConstants.DEVICE_PROPERTY_DEVICE_FRIENDLY_NAME:
  8.             // writable string properties kept in shared preferences
  9.             String value = mDeviceProperties.getString(Integer.toString(property), "");
  10.             int length = value.length();
  11.             if (length > 255) {
  12.                 length = 255;
  13.             }
  14.             value.getChars(0, length, outStringValue, 0);
  15.             outStringValue[length] = 0;
  17.             ///START. Fix the display error on PC. By XiaFei, 20170503.
  18.             // Return the device name for the PC display if the FriendlyName is empty!!
  19.             String deviceName = SystemProperties.get("ro.product.name");
  20.             int lengthDeviceName = deviceName.length();
  21.             if (lengthDeviceName > 255) {
  22.                 lengthDeviceName = 255;
  23.             }
  24.             if(lengthDeviceName >0) {
  25.                 deviceName.getChars(0, lengthDeviceName, outStringValue, 0);
  26.                 outStringValue[lengthDeviceName] = 0;
  27.                 ///SXlog.d(TAG, "getDeviceProperty  deviceName = " + deviceName + ", lengthDeviceName = " + lengthDeviceName);
  28.             } else {
  29.                 ///SXlog.d(TAG, "getDeviceProperty  lengthDeviceName = " + lengthDeviceName);
  30.             }
  31.             ///END. Fix the display error on PC. By XiaFei, 20170503.
  33.             return MtpConstants.RESPONSE_OK;
  35.         /// 此处省略 N 行
  36.     }
  37. }