appium 【已解决】Android，每次启动手机中都会安装Appium settings和Unclock的方法

 WebDriverException: Message: A new session could not be created. (Original error: Command failed: C:\Windows\system32\cmd.exe /s /c "D:\AutoTest\adt-bundle-windows-x86-20140702\sdk\platform-tools\adb.exe -s GWY0216A22013956 install "D:\AutoTest\appium\Appium\node_modules\appium\build\settings_apk\settings_apk-debug.apk""
 Failed to install D:\AutoTest\appium\Appium\node_modules\appium\build\settings_apk\settings_apk-debug.apk: Failure [INSTALL_FAILED_ALREADY_EXISTS: Attempt to re-install io.appium.settings without first uninstalling.]
)
根据以上报错信息，可以看到Appium settings和Unclock的安装路径。

...
Android.prototype.start = function (cb, onDie) {
  this.launchCb = cb;
  this.uiautomatorExitCb = onDie;
  logger.info("Starting android appium");
  async.series([
    this.initJavaVersion.bind(this),
    this.initAdb.bind(this),
    this.packageAndLaunchActivityFromManifest.bind(this),
    this.initUiautomator.bind(this),
    this.prepareDevice.bind(this),
    this.checkApiLevel.bind(this),
    this.pushStrings.bind(this),
    this.processFromManifest.bind(this),
    this.uninstallApp.bind(this),
    this.installAppForTest.bind(this),
    this.forwardPort.bind(this),
    this.pushAppium.bind(this),
    this.initUnicode.bind(this),
    //this.pushSettingsApp.bind(this),    #手动注释此2行代码，即可解决问题
    //this.pushUnlock.bind(this),
    function (cb) {this.uiautomator.start(cb);}.bind(this),
    this.wakeUp.bind(this),
    this.unlock.bind(this),
    this.getDataDir.bind(this),
    this.setupCompressedLayoutHierarchy.bind(this),
    this.startAppUnderTest.bind(this),
    this.initAutoWebview.bind(this),
    this.setActualCapabilities.bind(this)
  ], function (err) {
    if (err) {
      this.shutdown(function () {
        this.launchCb(err);
      }.bind(this));
    } else {
      this.didLaunch = true;
      this.launchCb(null, this.proxySessionId);
    }
  }.bind(this));
};