从我自己的服务器上下载APK时解析器错误

Question

It may be duplicate question of stackoverflow.com/questions/11135680/parse-error-while-installing-downloaded-apk-file , but i didn't find any answers to solve this.

Let me say the issue what i am facing.

I have an application installed in tablet. This application will check for the update whenever it launches. If there is an update it will download the apk and install it automatically. I have used the .NET service as webservice. My .NET service will convert the APK into byte[]array format which is stored in mySQL DB and sent that byte[]Array to my Android Application.

Everything works fine but while installing i am getting

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"PARSER ERROR" Problem parsing a package

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Please don't say check the signature of an apk, everything is okay

Android Code:

SoapPrimitive pResponse = (SoapPrimitive) envelope.getResponse();                           
byte[] bResponse = Base64.decodeBase64((pResponse.toString().getBytes("UTF-8")));

Struggling alot i have found that the Byte[] response in android is not matching with .net Byte[] as java has signed byte (sbyte -128 to 127) , while .net has unsigned byte(byte 0 to 255) eg: In .NET [80,40,2,2,8,0,0,0,12,240,200...........] In Android [80,40,2,2,8,0,0,0,12,-16,-56...........]

I can use int unsigned = b & 0xFF; to convert that to unsigned byte[] but my problem is my loop will run for 662600 time.

How can i overcome with this issue, Any suggestions from you guys is much helpful for me.

Answer 1

I had done mistake with installation path where the apk is downloaded.Guys don't bother about the signed and unsigned bytes[]

Steps I had followed for auto updation of an apk from server.

1. Signature of the Previous Version of an apk and the latest/updated apk should be same.

2. Ensure that the downloaded path and installation path of the apk are same.

NOTE: You can use byte[] or Stream for response from your service