安卓使用webservice下载APK

您可以使用以下步骤在Android中使用WebService下载APK：

1.创建一个类来处理WebService请求

public class WebServiceHandler {

    private static final String SOAP_ACTION = "http://tempuri.org/DownloadAPK";
    private static final String METHOD_NAME = "DownloadAPK";
    private static final String NAMESPACE = "http://tempuri.org/";
    private static final String URL = "http://yourwebserviceurl";

    public static void downloadAPK() {

        SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);

        SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
        envelope.dotNet = true;
        envelope.setOutputSoapObject(request);

        HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);

        try {
            androidHttpTransport.call(SOAP_ACTION, envelope);
            SoapPrimitive response = (SoapPrimitive) envelope.getResponse();
            String apkData = response.toString();

            // Save the APK
            FileOutputStream fileOutputStream = new FileOutputStream(Environment.getExternalStorageDirectory() + "/app.apk");
            fileOutputStream.write(Base64.decode(apkData, Base64.NO_WRAP));
            fileOutputStream.close();

            // Install the APK
            Intent intent = new Intent(Intent.ACTION_VIEW);
            intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory() + "/app.apk")), "application/vnd.android.package-archive");
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            mContext.startActivity(intent);

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

2.在Android应用程序中调用该方法

WebServiceHandler.downloadAPK();

这将下载APK文件，并保存在设备的根目录中。然后，它将启动Android系统的安装器来安装APK文件。

请注意，您需要替换“SOAP_ACTION”，“METHOD_NAME”，“NAMESPACE”和“URL”与您自己的WebService URL。另外，您需要确保设备上已经启用了从未知来源安装应用程序的选项。