java.io.FileNotFoundException在android系统

Question

我使用的代码

public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.gallery); 

    Intent i = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 
    startActivityForResult(i, SELECT_PICTURE); 
} 

public void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) { 
    Bitmap bitmap = null; 
    switch (requestCode) { 
    case SELECT_PICTURE: 
     if (resultCode == RESULT_OK) { 
      Uri selectedImage = imageReturnedIntent.getData(); 
      try { 
       bitmap = decodeUri(selectedImage); 
      } catch (FileNotFoundException e) { 
       e.printStackTrace(); 
      } 
      MyApplicationGlobal.bitmap = bitmap; 
      MyApplicationGlobal.imageUri = selectedImage.toString(); 
      Log.v("selectedImage", "selectedImage: " + selectedImage.getPath()); 

      Intent intentUpload = new Intent(GalleryActivity.this, UploadActivity.class); 
      startActivity(intentUpload); 
      finish(); 
     } 
    } 

选择从图库中的图片，然后我试图通过调用Web服务

MultipartEntity reqEntity = new MultipartEntity(); 
    try { 
     reqEntity.addPart("email", new StringBody(email)); 
     Log.v("in uploadImageUsingMultiPart", "imagePath: " + MyApplicationGlobal.imageUri); 
     reqEntity.addPart("name", new FileBody(new File(MyApplicationGlobal.imageUri))); 
     reqEntity.addPart("img_desc", new StringBody(img_desc)); 
     reqEntity.addPart("amount", new StringBody(amount)); 
     reqEntity.addPart("request_type", new StringBody("INSERT")); 
    } catch (UnsupportedEncodingException e) { 
     e.printStackTrace(); 
    } 

来上传图片，但我越来越错误java.io.FileNotFoundException

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java.io.FileNotFoundException: /content:/media/external/images/media/526 (No such file or directory) 
at org.apache.harmony.luni.platform.OSFileSystem.open(Native Method) 
at dalvik.system.BlockGuard$WrappedFileSystem.open(BlockGuard.java:239) 
at java.io.FileInputStream.<init>(FileInputStream.java:88) 
at org.apache.http.entity.mime.content.FileBody.writeTo(FileBody.java:100) 
at org.apache.http.entity.mime.HttpMultipart.doWriteTo(HttpMultipart.java:206) 
at org.apache.http.entity.mime.HttpMultipart.writeTo(HttpMultipart.java:224) 
at org.apache.http.entity.mime.MultipartEntity.writeTo(MultipartEntity.java:183) 
at org.apache.http.impl.entity.EntitySerializer.serialize(EntitySerializer.java:97) 
at org.apache.http.impl.AbstractHttpClientConnection.sendRequestEntity(AbstractHttpClientConnection.java:162) 
at org.apache.http.impl.conn.AbstractClientConnAdapter.sendRequestEntity(AbstractClientConnAdapter.java:272) 
at org.apache.http.protocol.HttpRequestExecutor.doSendRequest(HttpRequestExecutor.java:237) 
at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:119) 
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:428) 
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555) 
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487) 
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465) 
at com.network.GetJSONFomURL.getJSONSrtringFromUrl(GetJSONFomURL.java:53) 
at com.network.WebServices.uploadImageUsingMultiPart(WebServices.java:73) 
at com.markphoto_activities.UploadActivity$MyAsyncTaskUploadImage.doInBackground(UploadActivity.java:127) 
at com.markphoto_activities.UploadActivity$MyAsyncTaskUploadImage.doInBackground(UploadActivity.java:1) 
at android.os.AsyncTask$2.call(AsyncTask.java:252) 
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 
at java.util.concurrent.FutureTask.run(FutureTask.java:137) 
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1081) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:574) 
at java.lang.Thread.run(Thread.java:1020) 

Answer 1

调用此方法，通过它的selectedUri，作为回报，你会得到的路径要

public String getPath(Uri uri) { 
    String[] projection = { MediaStore.Images.Media.DATA }; 
    Cursor cursor = managedQuery(uri, projection, null, null, null); 
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); 
    cursor.moveToFirst(); 
    return cursor.getString(column_index); 
} 

Answer 2

那是因为content:/media/external/images/media/526不是文件。它是媒体提供商的URI地址。如果你想要的文件检查这太问题：

Get filename and path from URI from mediastore

Answer 3

只是一个因为managedQuery更新已被弃用。

private String getPath(Uri uri) { 
    String[] data = { MediaStore.Images.Media.DATA }; 
    CursorLoader loader = new CursorLoader(context, uri, data, null, null, null); 
    Cursor cursor = loader.loadInBackground(); 
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); 
    cursor.moveToFirst(); 
    return cursor.getString(column_index); 
}