无法从Android中远程服务器下载的.apk文件 [英] Unable to download .apk file from remote server in Android

问题描述

我想从我的Web服务器上下载 .apk文件文件，但我越来越
java.io.FileNotFoundException：HTTP： //xxx/mygames/myapks/demo.apk 所有的时间。

不过，该文件是present本网​​址 下面是我的code，我在做什么。

 进口的java.io.File;
进口java.io.FileOutputStream中;
进口的java.io.InputStream;
进口java.net.HttpURLConnection中;
进口的java.net.URL;

进口android.content.Context;
进口android.content.Intent;
进口android.net.Uri;
进口android.os.AsyncTask;
进口android.os.Environment;
进口android.util.Log;

公共类InstallAPK扩展的AsyncTask＆LT;字符串，太虚，太虚＆GT; {

    私人上下文的背景下;
    公共无效setContext（上下文contextf）{
        上下文= contextf;
    }

    @覆盖
    保护无效doInBackground（字符串...为arg0）{
        尝试 {
            网址URL =新的URL（将arg0 [0]）;
            HttpURLConnection的C =（HttpURLConnection类）url.openConnection（）;
            c.setRequestMethod（GET）;
            c.setDoOutput（真正的）;
            c.connect（）;

            文件SD卡= Environment.getExternalStorageDirectory（）;
            文件MYDIR =新的文件（SD卡，安卓/数据/ com.sush19.app / TEMP）;
            myDir.mkdirs（）;
            文件OUTPUTFILE =新的文件（MYDIRtemp.apk）;
            如果（outputFile.exists（））{
                outputFile.delete（）;
            }
            FileOutputStream中FOS =新的FileOutputStream（OUTPUTFILE）;

            InputStream的是= c.getInputStream（）;

            byte []的缓冲区=新的字节[1024];
            INT LEN1 = 0;
            而（（LEN1 = is.​​read（缓冲液））！=  -  1）{
                fos.write（缓冲液，0，LEN1）;
            }
            fos.flush（）;
            fos.close（）;
            is.close（）;

            意向意图=新的意图（Intent.ACTION_VIEW）;
            intent.setDataAndType（Uri.fromFile（新文件（SD卡，安卓/数据/ com.sush19.app /温度/ temp.apk）），应用程序/ vnd.android.package存档）;
            intent.setFlags（Intent.FLAG_ACTIVITY_NEW_TASK）; //如果没有这个标志的android返回意图的错误！
            context.startActivity（意向）;


        }赶上（例外五）{
            Log.e（UpdateAPP+ e.getMessage（）Update错误！）;
        }
        返回null;
    }
}
 

在按钮单击我打电话如下

  InstallAPK downloadAndInstall =新InstallAPK（）;
downloadAndInstall.setContext（getApplicationContext（））;
downloadAndInstall.execute（HTTP：//xxx/mygames/myapks/demo.apk）;
 

我试着用文本文件为好，对于我刚上传demo.txt文件的http：//xxx/mygames/myapks/demo.txt 我获得同样的异常，但是当我浏览这个demo.txt文件的URL在浏览器中打开。我需要做的，从Web服务器下载的.apk文件。

我还包含所有必需的权限

 ＆LT;使用-权限的Andr​​oid：名称=android.permission.WRITE_EXTERNAL_STORAG​​E/＆GT;
＆LT;使用-权限的Andr​​oid：名称=android.permission.READ_EXTERNAL_STORAG​​E/＆GT;
＆LT;使用-权限的Andr​​oid：名称=android.permission.INTERNET对/＆GT;
＆LT;使用-权限的Andr​​oid：名称=android.permission.ACCESS_NETWORK_STATE/＆GT;
 

我收到上述例外的：

 的InputStream是= c.getInputStream（）;
 

解决方案

这是不是你的code故障。 这是服务器故障。只是尝试从浏览器中点击URL地址。

I want to download .apk file from my web server, but I'm getting
java.io.FileNotFoundException: http://xxx/mygames/myapks/demo.apk all the time.

But the file is present in this URL Below is my code, What I'm doing.

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Environment;
import android.util.Log;

public class InstallAPK extends AsyncTask<String,Void,Void> {

    private Context context;
    public void setContext(Context contextf){
        context = contextf;
    }

    @Override
    protected Void doInBackground(String... arg0) {
        try {
            URL url = new URL(arg0[0]);
            HttpURLConnection c = (HttpURLConnection) url.openConnection();
            c.setRequestMethod("GET");
            c.setDoOutput(true);
            c.connect();

            File sdcard = Environment.getExternalStorageDirectory();
            File myDir = new File(sdcard,"Android/data/com.sush19.app/temp");
            myDir.mkdirs();
            File outputFile = new File(myDir, "temp.apk");
            if(outputFile.exists()){
                outputFile.delete();
            }
            FileOutputStream fos = new FileOutputStream(outputFile);

            InputStream is = c.getInputStream();

            byte[] buffer = new byte[1024];
            int len1 = 0;
            while ((len1 = is.read(buffer)) != -1) {
                fos.write(buffer, 0, len1);
            }
            fos.flush();
            fos.close();
            is.close();

            Intent intent = new Intent(Intent.ACTION_VIEW);
            intent.setDataAndType(Uri.fromFile(new File(sdcard,"Android/data/com.sush19.app/temp/temp.apk")), "application/vnd.android.package-archive");
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); // without this flag android returned a intent error!
            context.startActivity(intent);


        } catch (Exception e) {
            Log.e("UpdateAPP", "Update error! " + e.getMessage());
        }
        return null;
    }
}

On button Click I'm calling as follow

InstallAPK downloadAndInstall = new InstallAPK();
downloadAndInstall.setContext(getApplicationContext());
downloadAndInstall.execute("http://xxx/mygames/myapks/demo.apk");

I tried with text file as well, for that I just uploaded demo.txt file to http://xxx/mygames/myapks/demo.txt I'm getting same Exception, but when I browse this demo.txt file URL it opens in the Browser. What I need to do to download .apk file from the Web server.

I've also Included all the required permissions

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

I'm getting the above Exception at:

InputStream is = c.getInputStream();

解决方案

It is not your code fault. It is server fault. just try to hit URL address from Browser.

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