Question

Helo，朋友我试图使用绑定服务从互联网上下载一个图像，通过下载方法我调用绑定服务类，并通过这个服务调用一个asyctask类来通过doInBackground显示doenload进度（URL .. 。urls）方法。但是当output = new FileOutputStream(Path+"hive.jpg");被调用时，错误java.io.FileNotFoundException: /mnt/sdcard/hive.jpg: open failed: EACCES (Permission denied)发生错误。请快速帮助，提前谢谢。

我取得了所有必要的许可。我的menifist文件许可：

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

我的背景方法代码如下：

    @Override
protected Long doInBackground(URL... urls) {

    int count;

        try {
            System.out.println("do in backgrounds");
            URL url = new URL(urls[0].toString());
            System.out.println("utl=" + url);

            URLConnection conexion = url.openConnection();
            System.out.println("open connecton+" + conexion);
            conexion.connect();

            int lenghtOfFile = conexion.getContentLength();
            Log.d("ANDRO_ASYNC", "Lenght of file: " + lenghtOfFile);
            InputStream input = new BufferedInputStream(url.openStream());
            System.out.println("input stream=" + input);

            String Path = Environment.getExternalStorageDirectory()
                    + File.separator;// "/sdcard/";

            System.out.println("PAth=" + Path);

            try {
                output = new FileOutputStream(Path+"hive.jpg");  // exception error here
                System.out.println("output stream=" + output);
            } catch (Exception e) {
                e.printStackTrace();
            }
            // OutputStream output = new FileOutputStream(Path+"hive.jpg");

            byte data[] = new byte[1024];

            long total = 0;

            System.out.println("before while");
            while ((count = input.read(data)) != -1) {
                total += count;
                int percent = (int) ((total * 100) / lenghtOfFile);
                publishProgress(percent);
                output.write(data, 0, count);
                System.out.println("file write successfulyy");
            }

            output.flush();
            output.close();
            input.close();
            System.out.println("close function ");
        } catch (Exception e) {
        }
    //}
    return null;

}

错误/异常如下：

  : java.io.FileNotFoundException: /mnt/sdcard/hive.jpg: open failed: EACCES (Permission denied)
at libcore.io.IoBridge.open(IoBridge.java:416)
at java.io.FileOutputStream.<init>(FileOutputStream.java:88)
at java.io.FileOutputStream.<init>(FileOutputStream.java:128)
at java.io.FileOutputStream.<init>(FileOutputStream.java:117)
    at com.example.boundservice2.BackgroundDownload.doInBackground(BackgroundDownload.java:63)
    at com.example.boundservice2.BackgroundDownload.doInBackground(BackgroundDownload.java:1)
    at android.os.AsyncTask$2.call(AsyncTask.java:287)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:856)
   Caused by: libcore.io.ErrnoException: open failed: EACCES (Permission denied)
at libcore.io.Posix.open(Native Method)
at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
at libcore.io.IoBridge.open(IoBridge.java:400)

Answer 1

请将您的代码更改为以下代码，

File file = new File( Path + "hive.jpg" );     // Add this line 
output = new FileOutputStream ( file );

if (!file.exists())                           // Add this code 
{
    file.createNewFile();
}

Android使用绑定服务从网络下载图像 - 在storin gto sd卡中拒绝访问

1 个答案: