Apk文件下载在Android中使用Java时出错

Question

。我按照本教程进行操作并收到错误“PARSING ERROR包含一个包含问题的问题”。我已在Android设备Samsung Galaxy S3中查看结果。

    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;
 }}  
  }

我在Complete Action using对话后尝试按PACKAGE INSTALLER或VERIFY AND INSTALL两种情况时出现此错误。

Answer 1

将你的表现改为喜欢

这应该工作正常我认为..如果没有工作，请发布你的教程链接我错过了..我需要检查它...我会更新答案... 并且还提到你是如何通过eclipse或其他进程安装应用程序如导入apk ...如果将apk导入到真实设备意味着请检查你的设备版本，如果它的s3勒芒它有ICS api级别包括14或15所以更改那..如果它的jellly bean意味着你最多可以使用18