com.google.gson.JsonSyntaxException：java.lang.IllegalStateException：应为 BEGIN_OBJECT 但为 STRING
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【中文标题】com.google.gson.JsonSyntaxException：java.lang.IllegalStateException：应为 BEGIN_OBJECT 但为 STRING【英文标题】：com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING 【发布时间】：2015-11-06 02:03:43 【问题描述】： package com.myapp.app;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.myapp.app.dataaccess.DatabaseHelper;
import com.myapp.app.dataobjects.MediaMO;
import com.myapp.app.dataobjects.UserMO;
import com.myapp.app.delegates.MediaDelegates;
import com.myapp.app.delegates.UserDelegate;
import com.myapp.app.utility.Constants;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class ImageUploadActivity extends Activity
private static int RESULT_LOAD_IMAGE = 1;
//EditText initialized here
EditText Myusername;
EditText user;
private MediaDelegates mediaDelegates = new MediaDelegates();
private File imgFile;
private DatabaseHelper dbHelper;
private Context context;
private UserMO userMO = new UserMO();
private ImageView imageView;
private EditText eText;
private Gson gson = new Gson();
private ProgressDialog prgDialog;
private MediaMO mediaMO = new MediaMO();
private UserDelegate userDelegates = new UserDelegate();
private String text;
@Override
public boolean onCreateOptionsMenu(Menu menu)
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.image_upload, menu);
return true;
/**
* Called when the activity is first created.
*/
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.imageupload);
context = getApplicationContext();
dbHelper = new DatabaseHelper(context);
userMO = dbHelper.getRingeeUserData(1);
imageView = (ImageView) findViewById(R.id.imgView);
prgDialog = new ProgressDialog(this);
// Set Progress Dialog Text
prgDialog.setMessage("Please wait...");
// Set Cancelable as False
prgDialog.setCancelable(false);
prgDialog.show();
new AsyncTask<Void, Void, Bitmap>()
@Override
protected Bitmap doInBackground(Void... arg0)
String mediaMo = mediaDelegates.getFileFromServer(userMO, context);
if (!mediaMo.equals("null"))
mediaMO = gson.fromJson(mediaMo, new TypeToken<MediaMO>()
.getType());
try
URL url = new URL(mediaMO.getFileSrcLink());
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
return BitmapFactory.decodeStream(input);
catch (IOException e)
Log.i(Constants.TAG, e.toString());
else
mediaMO = null;
Bitmap largeIcon = BitmapFactory.decodeResource(getResources(), R.drawable.ic_action_user);
return largeIcon;
@Override
protected void onPostExecute(Bitmap myBitmap)
prgDialog.cancel();
imageView.setImageBitmap(myBitmap);
.execute(null, null, null);
//EditText added here for get current username
Myusername = (EditText) findViewById(R.id.userEditText);
String s = userMO.getUserName();
Myusername.setText(s);
Myusername.setOnClickListener(new View.OnClickListener()
public void onClick(View v)
final String str1 = Myusername.getText().toString();
Intent int1 = new Intent(ImageUploadActivity.this, NameUpdateActivity.class);
Bundle bundle = new Bundle();
bundle.putString("userdata1", str1);
int1.putExtras(bundle);
//(int1);
startActivityForResult(int1, 0);
);
Button buttonAddImage = (Button) findViewById(R.id.buttonAddPicture);
buttonAddImage.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View view)
Intent galleryIntent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
// Start the Intent
startActivityForResult(galleryIntent, RESULT_LOAD_IMAGE);
);
Button buttonLoadImage = (Button) findViewById(R.id.buttonLoadPicture);
buttonLoadImage.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View arg0)
// prgDialog.show();
if (mediaMO == null)
new AsyncTask<Void, Void, Bitmap>()
@Override
protected Bitmap doInBackground(Void... arg0)
MediaMO mediaMO1 = new MediaMO();
mediaMO1.setRingeeUserId(userMO.getRingeeUserId());
mediaMO1.setIsType(Constants.IS_TYPE_PROFILE_IMAGE);
String mediaMo = mediaDelegates.uploadFileToServer(mediaMO1, context, imgFile);
if (!mediaMo.equals("null"))
mediaMO = gson.fromJson(mediaMo, new TypeToken<MediaMO>()
.getType());
try
URL url = new URL(mediaMO.getFileSrcLink());
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
return BitmapFactory.decodeStream(input);
catch (IOException e)
Log.i(Constants.TAG, e.toString());
Bitmap largeIcon = BitmapFactory.decodeResource(getResources(), R.drawable.ic_action_user);
return largeIcon;
@Override
protected void onPostExecute(Bitmap myBitmap)
prgDialog.cancel();
imageView.setImageBitmap(myBitmap);
.execute(null, null, null);
else
new AsyncTask<Void, Void, Bitmap>()
@Override
protected Bitmap doInBackground(Void... arg0)
String mediaMo = mediaDelegates.updateFileToServer(mediaMO, context, imgFile);
if (!mediaMo.equals("null"))
mediaMO = gson.fromJson(mediaMo, new TypeToken<MediaMO>()
.getType());
try
URL url = new URL(mediaMO.getFileSrcLink());
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
return BitmapFactory.decodeStream(input);
catch (IOException e)
Log.i(Constants.TAG, e.toString());
Bitmap largeIcon = BitmapFactory.decodeResource(getResources(), R.drawable.ic_action_user);
return largeIcon;
@Override
protected void onPostExecute(Bitmap myBitmap)
prgDialog.cancel();
imageView.setImageBitmap(myBitmap);
.execute(null, null, null);
);
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data)
Uri selectedImage = data.getData();
String[] filePathColumn = MediaStore.Images.Media.DATA;
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
ImageView imageView = (ImageView) findViewById(R.id.imgView);
imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
imgFile = new File(picturePath);
这是我收到“java.lang.RuntimeException:An error occurred while execution doInBackground()”的代码。我是android的新手。我不明白为什么会出现这个错误，任何人帮助我如何解决这个错误。
my logcat is
08-13 13:31:22.520 18138-18255/? E/AndroidRuntime﹕ FATAL EXCEPTION: AsyncTask #5
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:299)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
at java.util.concurrent.FutureTask.run(FutureTask.java:239)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
at java.lang.Thread.run(Thread.java:838)
Caused by: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:200)
at com.google.gson.Gson.fromJson(Gson.java:810)
at com.google.gson.Gson.fromJson(Gson.java:775)
at com.google.gson.Gson.fromJson(Gson.java:724)
at com.ringee.app.ImageUploadActivity$4$2.doInBackground(ImageUploadActivity.java:197)
at com.ringee.app.ImageUploadActivity$4$2.doInBackground(ImageUploadActivity.java:192)
at android.os.AsyncTask$2.call(AsyncTask.java:287)
at java.util.concurrent.FutureTask.run(FutureTask.java:234)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
at java.lang.Thread.run(Thread.java:838)
Caused by: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $
at com.google.gson.stream.JsonReader.beginObject(JsonReader.java:387)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:189)
at com.google.gson.Gson.fromJson(Gson.java:810)
at com.google.gson.Gson.fromJson(Gson.java:775)
at com.google.gson.Gson.fromJson(Gson.java:724)
at com.ringee.app.ImageUploadActivity$4$2.doInBackground(ImageUploadActivity.java:197)
at com.ringee.app.ImageUploadActivity$4$2.doInBackground(ImageUploadActivity.java:192)
at android.os.AsyncTask$2.call(AsyncTask.java:287)
at java.util.concurrent.FutureTask.run(FutureTask.java:234)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
at java.lang.Thread.run(Thread.java:838)
【问题讨论】：
***.com/questions/2190161/… 检查此问题以了解运行时异常 发布你的整个 logcat 您的最低 SDK 级别是多少？ RuntimeException 不相关。细读“起因”部分真的太麻烦了吗？ 引起：com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: 预期 BEGIN_OBJECT 但在第 1 行第 1 列路径 $" mediaMO = gson.fromJson(mediaMo, new TypeToken在第 165 行，您是否尝试过仅传递您尝试转换的类而不是使用 TypeToken？
mediaMO = gson.fromJson(mediaMo, MediaMO.class);
而不是
mediaMO = gson.fromJson(mediaMo, new TypeToken<MediaMO>() .getType());
【讨论】：
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