Java android.view.WindowManager$BadTokenException:无法添加窗口--标记null不适用于应用程序

我已经创建了一个自定义阵列适配器，我有图像视图，单击该图像视图，我打开了一个对话框，但它显示了android.view.WindowManager$BadTokenException:无法添加窗口--标记null不适用于应用程序 她的密码是我的

下面这行给了我一个错误

if (context != null) {
    Dialog dialog = new Dialog(context);
    dialog.setContentView(R.layout.spread_dialogue);
    dialog.setTitle("New Post");
    dialog.show();
}


public class Customfeedadapter extends ArrayAdapter<Rowfeeds> {

    Context context;
    Rowfeeds feeds;
    ViewHolder holder = null;
    ImageView imgview, likeimgview;
    Vector<String> mfeedid = new Vector<String>();
    Vector<String> muserid = new Vector<String>();
    public String guestlist;
    private ProgressDialog simpleWaitDialog;
    public String mssg;
    public String likemssg;

    Vector<String> mfeedlike = new Vector<String>();
    Vector<String> mfeedspread = new Vector<String>();
    Vector<String> mfeeddate = new Vector<String>();
    Vector<String> mfeedtime = new Vector<String>();
    private String likestrng, spreadstng, datestrng, timestrng;

public Customfeedadapter(Context context, int resource, List<Rowfeeds> objects, Vector<String> feedIdvector, Vector<String> userIdvector, Vector<String> feedlikevector, Vector<String> feedspreadvector, Vector<String> feeddatevector, Vector<String> feedtimevector) {
    super(context, resource, objects);
    // TODO Auto-generated constructor stub
    this.context = context;
    this.mfeedid = feedIdvector;
    this.muserid = userIdvector;

    this.mfeedlike = feedlikevector;
    this.mfeedspread = feedspreadvector;
    this.mfeeddate = feeddatevector;
    this.mfeedtime = feedtimevector;
}

private class ViewHolder {

    TextView txtTitle;
    TextView txtDesc;
    TextView feedlike;
    TextView feedspread;
    TextView feeddate;
    TextView feedtime;
}

@Override
public View getView(final int position, View convertView, final ViewGroup parent) {
    // TODO Auto-generated method stub
    try {
        feeds = getItem(position);
        LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.feeds, null);
            holder = new ViewHolder();
            // Log.i("imgvectr", ""+mfeedlike.elementAt(position));
            likestrng = "" + mfeedlike.elementAt(position);
            spreadstng = "" + mfeedspread.elementAt(position);
            datestrng = "" + mfeeddate.elementAt(position);
            timestrng = "" + mfeedtime.elementAt(position);
            holder.txtTitle = (TextView) convertView.findViewById(R.id.textsimple);
            holder.txtDesc = (TextView) convertView.findViewById(R.id.showtime);
            holder.feedlike = (TextView) convertView.findViewById(R.id.feedlikes);
            holder.feedspread = (TextView) convertView.findViewById(R.id.textView1);
            holder.feeddate = (TextView) convertView.findViewById(R.id.feeddatetv);
            holder.feedtime = (TextView) convertView.findViewById(R.id.feedtime);
        } else //Log.v("else", "else");
        {
            holder = (ViewHolder) convertView.getTag();
        }
        holder.txtTitle.setTextColor(Color.BLACK);
        holder.txtDesc.setTextColor(Color.BLACK);

        //Log.v("getMfeedid", ""+feeds.getMfeedid());
        holder.txtTitle.setText(feeds.getMsg());
        holder.txtDesc.setText("~" + feeds.getUsrname());
        holder.feedlike.setText(likestrng);
        holder.feedspread.setText(spreadstng + " Spreads");
        holder.feeddate.setText(datestrng);
        holder.feedtime.setText(timestrng);
    } catch (Exception e) {
        // TODO Auto-generated catch block
        //Log.v("Exception", e.toString());
    }

    // spread icon
    imgview = (ImageView) convertView.findViewById(R.id.imageView2);
    imgview.setTag(position);
    imgview.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            //String strng = ""+getItem(position);

            try {
                //Toast.makeText(context,"hi",Toast.LENGTH_SHORT).show();
                if (context != null) {
                    Dialog dialog = new Dialog(context);
                    dialog.setContentView(R.layout.spread_dialogue);
                    dialog.setTitle("New Post");
                    dialog.show();
                }
            } catch (Exception e) {
                // TODO Auto-generated catch block
                Log.v("Exception", e.toString());
            }

            /*Log.v("strng", ""+position);
             mfeedid.elementAt(position);
             Log.v("mfeedid.elementAt(position)", ""+mfeedid.elementAt(position));
             String value = ""+mfeedid.elementAt(position);
             new SendApproveValue().execute(value.trim());*/
        }
    });

    likeimgview = (ImageView) convertView.findViewById(R.id.imageView1);
    likeimgview.setTag(position);
    likeimgview.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Log.v("strng", "" + position);
            mfeedid.elementAt(position);
            muserid.elementAt(position);
            Log.v("mfeedid.elementAt(position)", "" + mfeedid.elementAt(position));
            Log.v("muserid.elementAt(position)", "" + muserid.elementAt(position));
            String value = "" + mfeedid.elementAt(position);
            String value2 = "" + muserid.elementAt(position);
            new SendlikesValue().execute(value.trim(), value2.trim());
        }
    });
    return convertView;
}

private class SendApproveValue extends AsyncTask<String, Void, String> {

    @Override
    protected String doInBackground(String... param) {
        // TODO Auto-generated method stub
        Log.v("param", "= " + param[0]);
        String approvevalue = "" + param[0];
        try {
            Log.i("spreadsInBackground", "spreadsInBackground");
            HttpClient hc = new DefaultHttpClient();
            HttpPost postMethod = new HttpPost("http://192.168.21.74/mynetwork/formapi/spreads");
            List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
            nameValuePairs.add(new BasicNameValuePair("feed_id", approvevalue));
            //nameValuePairs.add(new BasicNameValuePair("to", "5"));
            postMethod.setEntity(new UrlEncodedFormEntity(nameValuePairs));
            HttpResponse rp = hc.execute(postMethod);
            if (rp.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                String result3 = EntityUtils.toString(rp.getEntity());
                Log.v("spreads_data", "" + result3);
                JSONObject jobject = new JSONObject(result3);
                Log.v("msg", "" + jobject.getString("msg"));
                mssg = "" + jobject.getString("msg");
            } else {
                Log.d("spreadsrJSON", "StatusCode " + rp.getStatusLine().getStatusCode());
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            Log.i("Exception", e.toString());
        }
        return null;
    }

    @Override
    protected void onPreExecute() {
        Log.i("Async-Example", "onPreExecute Called");
        //simpleWaitDialog = ProgressDialog.show(context,"Wait..", "Sending data");
    }

    @Override
    protected void onPostExecute(String result) {
        Log.i("Async-Example", "onPostExecute Called");
        Toast.makeText(context, mssg, Toast.LENGTH_SHORT).show();
        //Toast.makeText(context,resultt,Toast.LENGTH_SHORT).show();
        //RowItem3 item3 = new RowItem3(/*vector.elementAt(i),*/vector);
        //simpleWaitDialog.dismiss();
    }
}

private class SendlikesValue extends AsyncTask<String, Void, String> {

    @Override
    protected String doInBackground(String... param) {
        // TODO Auto-generated method stub
        Log.v("param2", "= " + param[0]);
        Log.v("param2", "= " + param[1]);
        String approvevalue = "" + param[0];
        String approvevalue2 = "" + param[1];
        try {
            Log.i("SendlikesValue", "SendlikesValue");
            HttpClient hc = new DefaultHttpClient();
            HttpPost postMethod = new HttpPost("http://192.168.21.74/mynetwork/formapi/likes");
            List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
            nameValuePairs.add(new BasicNameValuePair("feed_id", approvevalue));
            nameValuePairs.add(new BasicNameValuePair("user_id", approvevalue2));
            postMethod.setEntity(new UrlEncodedFormEntity(nameValuePairs));
            HttpResponse rp = hc.execute(postMethod);
            if (rp.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                String result3 = EntityUtils.toString(rp.getEntity());
                Log.v("likes_data", "" + result3);
                JSONObject jobject = new JSONObject(result3);
                Log.v("msg", "" + jobject.getString("msg"));
                likemssg = "" + jobject.getString("msg");
            } else {
                Log.d("likesJSON", "StatusCode " + rp.getStatusLine().getStatusCode());
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            Log.i("likesException", e.toString());
        }
        return null;
    }

    @Override
    protected void onPreExecute() {
        Log.i("Async-Example", "onPreExecute Called");
        //simpleWaitDialog = ProgressDialog.show(context,"Wait..", "Sending data");
    }

    @Override
    protected void onPostExecute(String result) {
        Log.i("Async-Example", "onPostExecute Called");
        Toast.makeText(context, likemssg, Toast.LENGTH_SHORT).show();
        //RowItem3 item3 = new RowItem3(/*vector.elementAt(i),*/vector);
        //simpleWaitDialog.dismiss();
    }
}
}

if（上下文！=null）{
对话框=新对话框（上下文）；
对话框.setContentView（R.layout.spread_对话框）；
dialog.setTitle（“新职位”）；
dialog.show（）；
}
公共类Customfeedadapter扩展了ArrayAdapter{
语境；
行馈送；
ViewHolder=null；
ImageView imgview，likeimgview；
向量mfeedid=新向量（）；
向量muserid=新向量（）；
公共字符串访客列表；
private ProgressDialog simpleWaitDialog；
公共字符串mssg；
公共字符串类emssg；
向量mfeedlike=新向量（）；
向量mfeedpread=新向量（）；
向量mfeeddate=新向量（）；
向量mfeedtime=新向量（）；
私有字符串，如estrn、spreadstng、datestrng、timestrng；
公共Customfeedadapter（上下文上下文、int资源、列表对象、向量feedIdvector、向量userIdvector、向量feedlikevector、向量feedspreadvector、向量feeddatevector、向量feedtimevector）{
超级（上下文、资源、对象）；
//TODO自动生成的构造函数存根
this.context=上下文；
this.mfeedid=feedIdvector；
this.muserid=userIdvector；
this.mfeedlike=feedlikevector；
this.mfeedpread=feedspreadvector；
this.mfeeddate=feeddatevector；
this.mfeedtime=feedtimevector；
}
私有类视窗持有者{
TextView-txtTitle；
TextView-txtDesc；
文本视图feedlike；
TextView feedspread；
文本视图feeddate；
文本视图反馈时间；
}
@凌驾
公共视图getView（最终整型位置、视图转换视图、最终视图组父视图）{
//TODO自动生成的方法存根
试一试{
feed=getItem（位置）；
LayoutInflater mInflater=（LayoutInflater）context.getSystemService（Activity.LAYOUT\u INFLATER\u SERVICE）；
if（convertView==null）{
convertView=mInflater.充气（R.layout.feeds，空）；
holder=新的ViewHolder（）；
//Log.i（“imgvectr”，“mfeedlike.elementAt（位置））；
likestrng=“”+mfeedlike.elementAt（位置）；
spreadstng=“”+mfeedspread.elementAt（位置）；
datestrng=“”+mfeeddate.elementAt（位置）；
timestrng=“”+mfeedtime.elementAt（位置）；
holder.txtTitle=（TextView）convertView.findViewById（R.id.textsimple）；
holder.txtDesc=（TextView）convertView.findViewById（R.id.showtime）；
holder.feedlike=（TextView）convertView.findViewById（R.id.feedlikes）；
holder.feedspread=（TextView）convertView.findViewById（R.id.textView1）；
holder.feeddate=（TextView）convertView.findViewById（R.id.feeddatetv）；
holder.feedtime=（TextView）convertView.findViewById（R.id.feedtime）；
}else//Log.v（“else”、“else”）；
{
holder=（ViewHolder）convertView.getTag（）；
}
holder.txtTitle.setTextColor（Color.BLACK）；
holder.txtDesc.setTextColor（Color.BLACK）；
//Log.v（“getMfeedid”，即“+feed.getMfeedid（））；
holder.txtTitle.setText（feeds.getMsg（））；
holder.txtDesc.setText（“~”+feed.getUsrname（））；
holder.feedlike.setText（likestrng）；
holder.feedspread.setText（spreadstng+“利差”）；
holder.feeddate.setText（datestrng）；
holder.feedtime.setText（timestrng）；
}捕获（例外e）{
//TODO自动生成的捕捉块
//Log.v（“异常”，例如toString（））；
}
//传播图标
imgview=（ImageView）convertView.findViewById（R.id.imageView2）；
imgview.setTag（位置）；
setOnClickListener（新的OnClickListener（）{
@凌驾
公共void onClick（视图v）{
//TODO自动生成的方法存根
//字符串strng=”“+getItem（位置）；
试一试{
//Toast.makeText（上下文“hi”，Toast.LENGTH_SHORT）.show（）；
if（上下文！=null）{
对话框=新对话框（上下文）；
对话框.setContentView（R.layout.spread_对话框）；
dialog.setTitle（“新职位”）；
dialog.show（）；
}
}捕获（例外e）{
//TODO自动生成的捕捉块
Log.v（“异常”，例如toString（））；
}
/*Log.v（“strng”，位置“+”）；
mfeedid.elementAt（位置）；
Log.v（“mfeedid.elementAt（位置）”，“+mfeedid.elementAt（位置））；
字符串值=“”+mfeedid.elementAt（位置）；
新建SendApproveValue（）.execute（value.trim（））*/
}
});
likeimgview=（ImageView）convertView.findViewById（R.id.imageView1）；
likeimgview.setTag（位置）；
likeimgview.setOnClickListener（新的OnClickListener（）{
@凌驾
公共void onClick（视图v）{
//TODO自动生成的方法存根
Log.v（“strng”，位置“+”）；
mfeedid.elementAt（位置）；
muserid.elementAt（位置）；
Log.v（“mfeedid.elementAt（位置）”，“+mfeedid.elementAt（位置））；
Log.v（“muserid.elementAt（位置）”，“+muserid.elementAt（位置））；
字符串值=“”+mfeedid.elementAt（位置）；
字符串值2=“”+muserid.elementAt（位置）；
新建SendlikesValue（）.execute（value.trim（），value2.trim（））；
}
});
返回视图；
}
私有类SendApproveValue扩展异步任务{
@凌驾
受保护的字符串doInBackground（字符串…参数）{
//TODO自动生成的方法存根
Log.v（“param”，“=”+param[0]）；
字符串批准值
Activity mActivity = null;

Dialog dialog = new Dialog(mActivity);