Android 无法从服务器获取数据：JSON分析错误

我想从服务器解析JSON数据：

我创建了activity_main.xml，如下所示：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"    android:background="#F1F1F1"
tools:context=".MainActivity" >

<ListView
    android:id="@+id/list"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    tools:listitem="@layout/row" >

</ListView>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="4dp"
android:orientation="vertical" >

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <ImageView
        android:id="@+id/ivImage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="8dp"
        android:src="@drawable/ic_launcher" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/tvName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="ചെമ്മീന്‍ തീയല്‍"
            android:textColor="#166CED"
            android:textAppearance="?android:attr/textAppearanceLarge" />

        <TextView
            android:id="@+id/tvCategory"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#D64530"
            android:text="Non-Veg" />

    </LinearLayout>

</LinearLayout>

<TextView
    android:id="@+id/tvPreparation"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textColor="#009A57"
    android:text="sdfdfds " />

    public class Actors {

    private String name;
    private String preparation;
    private String category;
    private String photo;

    public Actors() {
        // TODO Auto-generated constructor stub
    }

    public Actors(String name, String preparation, String category, String photo) {
        super();
        this.name = name;
        this.preparation = preparation;
        this.category = category;
        this.photo = photo;
    }


    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPreparation() {
        return preparation;
    }

    public void setPreparation(String preparation) {
        this.preparation = preparation;
    }

    public String getCategory() {
        return category;
    }

    public void setCategory(String category) {
        this.category = category;
    }

    public String getPhoto() {
        return photo;
    }

    public void setPhoto(String photo) {
        this.photo = photo;
    }
}

 public class ActorAdapter extends ArrayAdapter<Actors> {
    ArrayList<Actors> actorList;
    LayoutInflater vi;
    int Resource;
    ViewHolder holder;

    public ActorAdapter(Context context, int resource, ArrayList<Actors> objects) {
        super(context, resource, objects);
        vi = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        Resource = resource;
        actorList = objects;
    }


    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // convert view = design
        View v = convertView;
        if (v == null) {
            holder = new ViewHolder();
            v = vi.inflate(Resource, null);
            holder.imageview = (ImageView) v.findViewById(R.id.ivImage);
            holder.tvName = (TextView) v.findViewById(R.id.tvName);
            holder.tvPreparation = (TextView) v.findViewById(R.id.tvPreparation);
            holder.tvCategory = (TextView) v.findViewById(R.id.tvCategory);
            v.setTag(holder);
        } else {
            holder = (ViewHolder) v.getTag();
        }
        holder.imageview.setImageResource(R.drawable.ic_launcher);
        new DownloadImageTask(holder.imageview).execute(actorList.get(position).getPhoto());
        holder.tvName.setText(actorList.get(position).getName());
        holder.tvPreparation.setText(actorList.get(position).getPreparation());
        holder.tvCategory.setText(actorList.get(position).getCategory());

        return v;

}

    static class ViewHolder {
        public ImageView imageview;
        public TextView tvName;
        public TextView tvPreparation;
        public TextView tvCategory;

    }

    private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
        ImageView bmImage;

        public DownloadImageTask(ImageView bmImage) {
            this.bmImage = bmImage;
        }

        protected Bitmap doInBackground(String... urls) {
            String urldisplay = urls[0];
            Bitmap mIcon11 = null;
            try {
                InputStream in = new java.net.URL(urldisplay).openStream();
                mIcon11 = BitmapFactory.decodeStream(in);
            } catch (Exception e) {
                Log.e("Error", e.getMessage());
                e.printStackTrace();
            }
            return mIcon11;
        }

        protected void onPostExecute(Bitmap result) {
            bmImage.setImageBitmap(result);
        }

    }
}

public class MainActivity extends Activity {

ArrayList<Actors> actorsList;

ActorAdapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);


    actorsList = new ArrayList<Actors>();


    new JSONAsyncTask().execute("http://localhost:8000/api/recepie");

    ListView listview = (ListView)findViewById(R.id.list);
    adapter = new ActorAdapter(getApplicationContext(), R.layout.row, actorsList);

    listview.setAdapter(adapter);

    listview.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int position,
                long id) {
            // TODO Auto-generated method stub
            Toast.makeText(getApplicationContext(), actorsList.get(position).getName(), Toast.LENGTH_LONG).show();              
        }
    });
}


class JSONAsyncTask extends AsyncTask<String, Void, Boolean> {

    ProgressDialog dialog;

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        dialog = new ProgressDialog(MainActivity.this);
        dialog.setMessage("Loading, please wait");
        dialog.setTitle("Connecting server");
        dialog.show();
        dialog.setCancelable(false);
    }

    @Override
    protected Boolean doInBackground(String... urls) {
        try {

            //------------------>>
            HttpGet httppost = new HttpGet(urls[0]);
            HttpClient httpclient = new DefaultHttpClient();
            HttpResponse response = httpclient.execute(httppost);

            // StatusLine stat = response.getStatusLine();
            int status = response.getStatusLine().getStatusCode();

            if (status == 200) {
                HttpEntity entity = response.getEntity();
                String data = EntityUtils.toString(entity);


                JSONObject jsono = new JSONObject(data);
                JSONArray jarray = jsono.getJSONArray("recepies");

                for (int i = 0; i < jarray.length(); i++) {
                    JSONObject object = jarray.getJSONObject(i);

                    Actors actor = new Actors();

                    actor.setName(object.getString("name"));
                    actor.setPreparation(object.getString("preparation"));
                    actor.setCategory(object.getString("category"));
                    actor.setPhoto(object.getString("photo"));

                    actorsList.add(actor);
                }
                return true;
            }

            //------------------>>

        } catch (ParseException e1) {
            e1.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return false;
    }

    protected void onPostExecute(Boolean result) {
        dialog.cancel();
        adapter.notifyDataSetChanged();
        if(result == false)
            Toast.makeText(getApplicationContext(), "Unable to fetch data from server", Toast.LENGTH_LONG).show();

    }
}

然后我创建了这样的适配器：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"    android:background="#F1F1F1"
tools:context=".MainActivity" >

<ListView
    android:id="@+id/list"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    tools:listitem="@layout/row" >

</ListView>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="4dp"
android:orientation="vertical" >

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <ImageView
        android:id="@+id/ivImage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="8dp"
        android:src="@drawable/ic_launcher" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/tvName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="ചെമ്മീന്‍ തീയല്‍"
            android:textColor="#166CED"
            android:textAppearance="?android:attr/textAppearanceLarge" />

        <TextView
            android:id="@+id/tvCategory"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#D64530"
            android:text="Non-Veg" />

    </LinearLayout>

</LinearLayout>

<TextView
    android:id="@+id/tvPreparation"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textColor="#009A57"
    android:text="sdfdfds " />

    public class Actors {

    private String name;
    private String preparation;
    private String category;
    private String photo;

    public Actors() {
        // TODO Auto-generated constructor stub
    }

    public Actors(String name, String preparation, String category, String photo) {
        super();
        this.name = name;
        this.preparation = preparation;
        this.category = category;
        this.photo = photo;
    }


    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPreparation() {
        return preparation;
    }

    public void setPreparation(String preparation) {
        this.preparation = preparation;
    }

    public String getCategory() {
        return category;
    }

    public void setCategory(String category) {
        this.category = category;
    }

    public String getPhoto() {
        return photo;
    }

    public void setPhoto(String photo) {
        this.photo = photo;
    }
}

 public class ActorAdapter extends ArrayAdapter<Actors> {
    ArrayList<Actors> actorList;
    LayoutInflater vi;
    int Resource;
    ViewHolder holder;

    public ActorAdapter(Context context, int resource, ArrayList<Actors> objects) {
        super(context, resource, objects);
        vi = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        Resource = resource;
        actorList = objects;
    }


    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // convert view = design
        View v = convertView;
        if (v == null) {
            holder = new ViewHolder();
            v = vi.inflate(Resource, null);
            holder.imageview = (ImageView) v.findViewById(R.id.ivImage);
            holder.tvName = (TextView) v.findViewById(R.id.tvName);
            holder.tvPreparation = (TextView) v.findViewById(R.id.tvPreparation);
            holder.tvCategory = (TextView) v.findViewById(R.id.tvCategory);
            v.setTag(holder);
        } else {
            holder = (ViewHolder) v.getTag();
        }
        holder.imageview.setImageResource(R.drawable.ic_launcher);
        new DownloadImageTask(holder.imageview).execute(actorList.get(position).getPhoto());
        holder.tvName.setText(actorList.get(position).getName());
        holder.tvPreparation.setText(actorList.get(position).getPreparation());
        holder.tvCategory.setText(actorList.get(position).getCategory());

        return v;

}

    static class ViewHolder {
        public ImageView imageview;
        public TextView tvName;
        public TextView tvPreparation;
        public TextView tvCategory;

    }

    private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
        ImageView bmImage;

        public DownloadImageTask(ImageView bmImage) {
            this.bmImage = bmImage;
        }

        protected Bitmap doInBackground(String... urls) {
            String urldisplay = urls[0];
            Bitmap mIcon11 = null;
            try {
                InputStream in = new java.net.URL(urldisplay).openStream();
                mIcon11 = BitmapFactory.decodeStream(in);
            } catch (Exception e) {
                Log.e("Error", e.getMessage());
                e.printStackTrace();
            }
            return mIcon11;
        }

        protected void onPostExecute(Bitmap result) {
            bmImage.setImageBitmap(result);
        }

    }
}

public class MainActivity extends Activity {

ArrayList<Actors> actorsList;

ActorAdapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);


    actorsList = new ArrayList<Actors>();


    new JSONAsyncTask().execute("http://localhost:8000/api/recepie");

    ListView listview = (ListView)findViewById(R.id.list);
    adapter = new ActorAdapter(getApplicationContext(), R.layout.row, actorsList);

    listview.setAdapter(adapter);

    listview.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int position,
                long id) {
            // TODO Auto-generated method stub
            Toast.makeText(getApplicationContext(), actorsList.get(position).getName(), Toast.LENGTH_LONG).show();              
        }
    });
}


class JSONAsyncTask extends AsyncTask<String, Void, Boolean> {

    ProgressDialog dialog;

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        dialog = new ProgressDialog(MainActivity.this);
        dialog.setMessage("Loading, please wait");
        dialog.setTitle("Connecting server");
        dialog.show();
        dialog.setCancelable(false);
    }

    @Override
    protected Boolean doInBackground(String... urls) {
        try {

            //------------------>>
            HttpGet httppost = new HttpGet(urls[0]);
            HttpClient httpclient = new DefaultHttpClient();
            HttpResponse response = httpclient.execute(httppost);

            // StatusLine stat = response.getStatusLine();
            int status = response.getStatusLine().getStatusCode();

            if (status == 200) {
                HttpEntity entity = response.getEntity();
                String data = EntityUtils.toString(entity);


                JSONObject jsono = new JSONObject(data);
                JSONArray jarray = jsono.getJSONArray("recepies");

                for (int i = 0; i < jarray.length(); i++) {
                    JSONObject object = jarray.getJSONObject(i);

                    Actors actor = new Actors();

                    actor.setName(object.getString("name"));
                    actor.setPreparation(object.getString("preparation"));
                    actor.setCategory(object.getString("category"));
                    actor.setPhoto(object.getString("photo"));

                    actorsList.add(actor);
                }
                return true;
            }

            //------------------>>

        } catch (ParseException e1) {
            e1.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return false;
    }

    protected void onPostExecute(Boolean result) {
        dialog.cancel();
        adapter.notifyDataSetChanged();
        if(result == false)
            Toast.makeText(getApplicationContext(), "Unable to fetch data from server", Toast.LENGTH_LONG).show();

    }
}

公共类Actorapter扩展了ArrayAdapter{
ArrayList actorList；
拉平机vi；
智力资源；
视窗座；
公共Actorapter（上下文、int资源、ArrayList对象）{
超级（上下文、资源、对象）；
vi=（LayoutFlater）上下文
.getSystemService（上下文布局\充气机\服务）；
资源=资源；
actorList=对象；
}
@凌驾
公共视图getView（int位置、视图转换视图、视图组父视图）{
//转换视图=设计
视图v=转换视图；
如果（v==null）{
holder=新的ViewHolder（）；
v=vi.充气（资源，空）；
holder.imageview=（imageview）v.findViewById（R.id.ivImage）；
holder.tvName=（TextView）v.findViewById（R.id.tvName）；
holder.tvPreparation=（TextView）v.findViewById（R.id.tvPreparation）；
holder.tvCategory=（TextView）v.findViewById（R.id.tvCategory）；
v、 setTag（支架）；
}否则{
holder=（ViewHolder）v.getTag（）；
}
holder.imageview.setImageResource（R.drawable.ic_启动器）；
新建下载的ImageTask（holder.imageview）.execute（actorList.get（position.getPhoto（））；
holder.tvName.setText（actorList.get（position.getName（））；
holder.tvPreparation.setText（actorList.get（position.getPreparation（））；
holder.tvCategory.setText（actorList.get（position.getCategory（））；
返回v；
}
静态类视窗夹{
公共影像视图；
公共文本视图tvName；
公共文本视图；
公共文本视图类别；
}
私有类DownloadImageTask扩展了AsyncTask{
图像视图bmImage；
公共下载ImageTask（ImageView bmImage）{
this.bmImage=bmImage；
}
受保护位图doInBackground（字符串…URL）{
字符串urldisplay=url[0]；
位图mIcon11=null；
试一试{
InputStream in=newjava.net.URL（urldisplay.openStream（）；
mIcon11=BitmapFactory.decodeStream（in）；
}捕获（例外e）{
Log.e（“Error”，e.getMessage（））；
e、 printStackTrace（）；
}
返回mIcon11；
}
受保护的void onPostExecute（位图结果）{
bmImage.setImageBitmap（结果）；
}
}
}

我在MainActivity中调用了适配器，如下所示：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"    android:background="#F1F1F1"
tools:context=".MainActivity" >

<ListView
    android:id="@+id/list"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    tools:listitem="@layout/row" >

</ListView>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="4dp"
android:orientation="vertical" >

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <ImageView
        android:id="@+id/ivImage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="8dp"
        android:src="@drawable/ic_launcher" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/tvName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="ചെമ്മീന്‍ തീയല്‍"
            android:textColor="#166CED"
            android:textAppearance="?android:attr/textAppearanceLarge" />

        <TextView
            android:id="@+id/tvCategory"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#D64530"
            android:text="Non-Veg" />

    </LinearLayout>

</LinearLayout>

<TextView
    android:id="@+id/tvPreparation"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textColor="#009A57"
    android:text="sdfdfds " />

    public class Actors {

    private String name;
    private String preparation;
    private String category;
    private String photo;

    public Actors() {
        // TODO Auto-generated constructor stub
    }

    public Actors(String name, String preparation, String category, String photo) {
        super();
        this.name = name;
        this.preparation = preparation;
        this.category = category;
        this.photo = photo;
    }


    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPreparation() {
        return preparation;
    }

    public void setPreparation(String preparation) {
        this.preparation = preparation;
    }

    public String getCategory() {
        return category;
    }

    public void setCategory(String category) {
        this.category = category;
    }

    public String getPhoto() {
        return photo;
    }

    public void setPhoto(String photo) {
        this.photo = photo;
    }
}

 public class ActorAdapter extends ArrayAdapter<Actors> {
    ArrayList<Actors> actorList;
    LayoutInflater vi;
    int Resource;
    ViewHolder holder;

    public ActorAdapter(Context context, int resource, ArrayList<Actors> objects) {
        super(context, resource, objects);
        vi = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        Resource = resource;
        actorList = objects;
    }


    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // convert view = design
        View v = convertView;
        if (v == null) {
            holder = new ViewHolder();
            v = vi.inflate(Resource, null);
            holder.imageview = (ImageView) v.findViewById(R.id.ivImage);
            holder.tvName = (TextView) v.findViewById(R.id.tvName);
            holder.tvPreparation = (TextView) v.findViewById(R.id.tvPreparation);
            holder.tvCategory = (TextView) v.findViewById(R.id.tvCategory);
            v.setTag(holder);
        } else {
            holder = (ViewHolder) v.getTag();
        }
        holder.imageview.setImageResource(R.drawable.ic_launcher);
        new DownloadImageTask(holder.imageview).execute(actorList.get(position).getPhoto());
        holder.tvName.setText(actorList.get(position).getName());
        holder.tvPreparation.setText(actorList.get(position).getPreparation());
        holder.tvCategory.setText(actorList.get(position).getCategory());

        return v;

}

    static class ViewHolder {
        public ImageView imageview;
        public TextView tvName;
        public TextView tvPreparation;
        public TextView tvCategory;

    }

    private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
        ImageView bmImage;

        public DownloadImageTask(ImageView bmImage) {
            this.bmImage = bmImage;
        }

        protected Bitmap doInBackground(String... urls) {
            String urldisplay = urls[0];
            Bitmap mIcon11 = null;
            try {
                InputStream in = new java.net.URL(urldisplay).openStream();
                mIcon11 = BitmapFactory.decodeStream(in);
            } catch (Exception e) {
                Log.e("Error", e.getMessage());
                e.printStackTrace();
            }
            return mIcon11;
        }

        protected void onPostExecute(Bitmap result) {
            bmImage.setImageBitmap(result);
        }

    }
}

public class MainActivity extends Activity {

ArrayList<Actors> actorsList;

ActorAdapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);


    actorsList = new ArrayList<Actors>();


    new JSONAsyncTask().execute("http://localhost:8000/api/recepie");

    ListView listview = (ListView)findViewById(R.id.list);
    adapter = new ActorAdapter(getApplicationContext(), R.layout.row, actorsList);

    listview.setAdapter(adapter);

    listview.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int position,
                long id) {
            // TODO Auto-generated method stub
            Toast.makeText(getApplicationContext(), actorsList.get(position).getName(), Toast.LENGTH_LONG).show();              
        }
    });
}


class JSONAsyncTask extends AsyncTask<String, Void, Boolean> {

    ProgressDialog dialog;

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        dialog = new ProgressDialog(MainActivity.this);
        dialog.setMessage("Loading, please wait");
        dialog.setTitle("Connecting server");
        dialog.show();
        dialog.setCancelable(false);
    }

    @Override
    protected Boolean doInBackground(String... urls) {
        try {

            //------------------>>
            HttpGet httppost = new HttpGet(urls[0]);
            HttpClient httpclient = new DefaultHttpClient();
            HttpResponse response = httpclient.execute(httppost);

            // StatusLine stat = response.getStatusLine();
            int status = response.getStatusLine().getStatusCode();

            if (status == 200) {
                HttpEntity entity = response.getEntity();
                String data = EntityUtils.toString(entity);


                JSONObject jsono = new JSONObject(data);
                JSONArray jarray = jsono.getJSONArray("recepies");

                for (int i = 0; i < jarray.length(); i++) {
                    JSONObject object = jarray.getJSONObject(i);

                    Actors actor = new Actors();

                    actor.setName(object.getString("name"));
                    actor.setPreparation(object.getString("preparation"));
                    actor.setCategory(object.getString("category"));
                    actor.setPhoto(object.getString("photo"));

                    actorsList.add(actor);
                }
                return true;
            }

            //------------------>>

        } catch (ParseException e1) {
            e1.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return false;
    }

    protected void onPostExecute(Boolean result) {
        dialog.cancel();
        adapter.notifyDataSetChanged();
        if(result == false)
            Toast.makeText(getApplicationContext(), "Unable to fetch data from server", Toast.LENGTH_LONG).show();

    }
}

公共类MainActivity扩展活动{
ArrayList ActorList；
ActorAdapter适配器；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_main）；
actorsList=newarraylist（）；
新建JSONAsyncTask（）。执行（“http://localhost:8000/api/recepie");
ListView ListView=（ListView）findViewById（R.id.list）；
适配器=新的Actorapter（getApplicationContext（），R.layout.row，ActorList）；
setAdapter（适配器）；
setOnItemClickListener（新的OnItemClickListener（）{
@凌驾
公共单击（适配器视图arg0，视图arg1，内部位置，
长id）{
//TODO自动生成的方法存根
Toast.makeText（getApplicationContext（），actorsList.get（position）.getName（），Toast.LENGTH_LONG）.show（）；
}
});
}
类JSONAsyncTask扩展了AsyncTask{
进程对话；
@凌驾
受保护的void onPreExecute（）{
super.onPreExecute（）；
dialog=新建ProgressDialog（MainActivity.this）；
setMessage（“正在加载，请稍候”）；
setTitle（“连接服务器”）；
dialog.show（）；
对话框。可设置可取消（false）；
}
@凌驾
受保护的布尔doInBackground（字符串…URL）{
试一试{
//------------------>>
HttpGet-httppost=新的HttpGet（URL[0]）；
HttpClient HttpClient=新的DefaultHttpClient（）；
HttpResponse response=httpclient.execute（httppost）；
//StatusLine stat=response.getStatusLine（）；
int status=response.getStatusLine（）.getStatusCode（）；
如果（状态==200）{
HttpEntity=response.getEntity（）；
字符串数据=EntityUtils.toString（实体）；
JSONObject jsono=新的JSONObject（数据）；
JSONArray jarray=jsono.getJSONArray（“recepies”）；
for（int i=0；i>
}捕获（解析异常e1）{
e1.printStackTrace（）；
}捕获（IOE异常）{
e、 printStackTrace（）；
}捕获（JSONException e）{
e、 printStackTrace（）；
}
返回false；
}
受保护的void onPostExecute（布尔结果）{
dialog.cancel（）；
adapter.notifyDataSetChanged（）；
如果（结果==false）
Toast.makeText（getApplicationContext（），“无法从服务器获取数据”，Toast.LENGTH_LONG.show（）；
}
}

但是get“无法从服务器获取数据”，我在Android Monitor中发现了两个错误。第一个错误是从GradienCache获取最大纹理大小，以及从缓存获取最大纹理大小：：initCon