Apk File download Error using Java in Android

问题

.I followed this tutorial and getting errors "PARSING ERROR THERE IS A PROBLEM PARSING THE PACKAGE". I have check the result in Android Device Samsung Galaxy S3.

    package com.mrfs.android.surveyapp.activities;

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

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


        public class ApkFileAsync extends Activity
        {
            UpdateApp updateAppInstance;

        @Override
        public void onCreate(Bundle savedBundleInstance)
        {

        super.onCreate(savedBundleInstance);
        updateAppInstance = new UpdateApp();
        updateAppInstance.setContext(getApplicationContext());
        updateAppInstance.execute("http://demo.ingresssolutions.com/proposalmanagement/services/user/getApkFile");
        }

        private class UpdateApp 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("POST");
                    c.setDoOutput(true);
                    c.connect();

                    String PATH = "/mnt/sdcard/Download/";
                    File file = new File(PATH);
                    file.mkdirs();
                    File outputFile = new File(file,"surveyapp.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.close();
                    is.close();

                  /*  Intent intent = new Intent(Intent.ACTION_VIEW);
                    intent.setDataAndType(Uri.fromFile(new File("/mnt/sdcard/Download/update.apk")), "application/vnd.android.package-archive");
                    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);*/ // without this flag android returned a intent error!
                    Intent intent = new Intent(Intent.ACTION_VIEW);
                    intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory() + "/download/" + "app.apk")), "application/vnd.android.package-archive");
                    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    startActivity(intent);  
                    context.startActivity(intent);


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

I am getting this error after Complete Action using dialog when trying to press either PACKAGE INSTALLER or VERIFY AND INSTALL in both cases same error.

回答1:

Change your manifes to like

This should work fine i think.. If not worked please post your tutorial link i missed it.. i need to check it.. and i will update answer... and also mention how you are installing app wether by eclipse or by some other process like importing apk... IF importing apk to real device means please check ur device version, If its s3 mans it has ICS api level includes 14 or 15 so change that.. if its jellly bean means you can use up to 18

来源：https://stackoverflow.com/questions/21159636/apk-file-download-error-using-java-in-android