Android - 如何解决“设备上没有剩余空间”的问题错误

Question

所以我最新的应用程序遇到了这个问题，它在 logcat 中抱怨设备上没有空间来保存文件，但情况绝对不是这样，因为我可以关闭我的应用程序打开库存相机并拍照。其他人都是如何处理这个问题的。

编辑：此方法中发生错误

    private void writeFile(Bitmap bmp, File f) {
    FileOutputStream out = null;

    try {
        out = new FileOutputStream(f);
        bmp.compress(Bitmap.CompressFormat.PNG, 80, out);//<---error here
    } catch (NullPointerException e) {
        e.printStackTrace();
        Log.w("nullpointerException on image error", "nullpointer");
    } catch (FileNotFoundException e) {
        Log.w("fileNotfoundException on image error", "filenotfound");
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    finally { 
        try { if (out != null ) out.close(); }
        catch(Exception ex) {} 
    }
}

，这是有关此错误的 logcat 报告：

java.io.IOException: no space left on device
at org.apache.harmony.luni.platform.OSFileSystem.write(Native Method)
at dalvik.system.BlockGuard$WrappedFileSystem.write(BlockGuard.java:171)
at java.io.FileOutputStream.write(FileOutputStream.java:300)
at android.graphics.Bitmap.nativeCompress(Native Method)
at data.ImageManager.writeFile(ImageManager.java:215)
at data.ImageManager.getBitmap(ImageManager.java:192)
at data.ImageManager.access$1(ImageManger.java:102)
at data.ImageManager$ImageQueueManager.run(ImageManager.java:290)
at java.lang.Thread.run(Thread.java:1019)

编辑：这是我如何在外部存储器上创建目录的方式

这是我用来创建我认为是 sd 卡的位置

    String sdState = android.os.Environment.getExternalStorageState();
    if (sdState.equals(android.os.Environment.MEDIA_MOUNTED)) {
        File sdDir = android.os.Environment.getExternalStorageDirectory();      
        cacheDir = new File(sdDir,"data/gr");
    }
    else
        cacheDir = context.getExternalCacheDir();

    if(!cacheDir.exists())
        cacheDir.mkdirs();


    if(sdState.equals(android.os.Environment.MEDIA_MOUNTED)){
        File adSdDir =     android.os.Environment.getExternalStorageDirectory();
        adCacheDir = new File(adSdDir,"data/ad");
    }else
        adCacheDir = context.getExternalCacheDir();

    if(!adCacheDir.exists())
        adCacheDir.mkdirs();
}

，然后在我查找或创建图像以进入目录的方法中：

 private Bitmap getBitmap(ImgRequestObj ids) {
    String url = null;
    String filename = ids.objId.toString();
    File f = null;

    try{
        if(ids.objName.equals("mark")){
            url = graffMarksURL;
            f = new File(cacheDir, filename);
        }else if(ids.objName.equals("admark")){
            url = adMarksURL;
            f = new File(adCacheDir, filename);
        }



    // Is the bitmap in our cache?
    Bitmap bitmap = BitmapFactory.decodeFile(f.getPath());
    if(bitmap != null) return bitmap;

    // Nope, have to download it
    try {   
            BitmapFactory.Options bfOptions=new BitmapFactory.Options();

            bfOptions.inDither=false;                     //Disable Dithering mode

            bfOptions.inPurgeable=true;                   //Tell to gc that whether it needs free memory, the Bitmap can be cleared

            bfOptions.inInputShareable=true;              //Which kind of reference will be used to recover the Bitmap data after being clear, when it will be used in the future


            DefaultHttpClient client;
            HttpResponse response = null;
            HttpParams params = null;// new Http parameters to be used for extra buffering room in VM
            HttpPost post = null;
            InputStream is = null;
            BufferedInputStream bis = null;
            Bitmap bmp = null;
            ArrayList<NameValuePair> nvp1 = new ArrayList<NameValuePair>();

            nvp1.add(new BasicNameValuePair("id", ids.objId.toString()));
            // - martin passing id to php script select statement
             client = new DefaultHttpClient();

            try {

                post = new HttpPost(url);
                params = post.getParams();//Setting the new Http params to post
                post.setEntity(new UrlEncodedFormEntity(nvp1));
                try{
                HttpConnectionParams.setSocketBufferSize(params, 8192);//Defining the new buffer size
                response = client.execute(post);

                }
                catch(HttpResponseException e){
                    e.getCause();
                                    }
            //Capture response from query and prepare as input
            HttpEntity entity = response.getEntity();
            // move content to Input Stream
                is = entity.getContent();

            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

                bis = new BufferedInputStream(is);
                try{
                bmp = BitmapFactory.decodeStream(bis, null, bfOptions);
                }finally{}

                    if( is != null )
                        try {
                            is.close();
                            //response = null;
                        } catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    //Log.w("inputstream of image closed", "for this image "+id.toString());
                    if( bis != null )
                        try {
                            //response = null;
                            bis.close();
                        } catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    bitmap = bmp;
                    writeFile(bitmap, f);
                    try{
                        bmp = null;
                    }catch(NullPointerException e){
                        e.printStackTrace();
                    }
                    return bitmap;}
                catch(Exception e){
            e.printStackTrace();
            }
        return bitmap;
    }catch(NullPointerException e){
        e.printStackTrace();
    }
    return null;
        }

Answer 1

您实际上是通过在 else 语句中使用 getCacheDir() 来使用内部内存。但是，如果您想存储大数据，那么建议使用 getExternalCacheDir()，因为并非所有 Android 手机都具有巨大的内部存储空间，但它们确实/可能具有更大的外部存储空间。

if (sdState.equals(android.os.Environment.MEDIA_MOUNTED)) { 
   File sdDir = context.getExternalCacheDir();
   cacheDir = new File(sdDir,"data"); 
} 
else 
   Log.e("storage", "SD card not found");

Answer 2

我最终将创建目录的代码更改为以下内容：

  String sdState = android.os.Environment.getExternalStorageState();
    if (sdState.equals(android.os.Environment.MEDIA_MOUNTED)) {
        File sdDir = android.os.Environment.getExternalStorageDirectory();      
        cacheDir = new File(sdDir,"data/gr");
    }
    else
        cacheDir = context.getExternalFilesDir(sdState); <--changed

    if(!cacheDir.exists())
        cacheDir.mkdirs();


    if(sdState.equals(android.os.Environment.MEDIA_MOUNTED)){
        File adSdDir = android.os.Environment.getExternalStorageDirectory();
        adCacheDir = new File(adSdDir,"data/ad");
    }else
        adCacheDir = context.getExternalFilesDir(sdState); <--changed

    if(!adCacheDir.exists())
        adCacheDir.mkdirs();
}

到目前为止，使用此功能我可以再次保存用相机拍摄的图像以及我所在区域下载的所有图像。