Android 解析isn'；t工作-安卓

我有下面的parse类用于在数据库函数中进行搜索，但解析不起作用。显示“无法解析”toast。 加上logcat没有显示任何错误，所以我无法指定导致toast显示的部分

public class Parser extends AsyncTask <Void, Void,Integer> {

    Context ctx;
    String data;
    ListView listView;
    ArrayList<String> titles = new ArrayList<>();


    public Parser (Context ctx, String data, ListView listView){
        this.ctx=ctx;
        this.data=data;
        this.listView=listView;
    }
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }

    @Override
    protected Integer doInBackground(Void... params) {
        return this.parse();
    }

    @Override
    protected void onPostExecute(Integer integer) {
        super.onPostExecute(integer);

        if (integer == 1){

            ArrayAdapter adapter = new ArrayAdapter(ctx, android.R.layout.simple_list_item_1, titles);
            listView.setAdapter(adapter);
        }else {
            Toast.makeText(ctx, "Unable to Parse", Toast.LENGTH_LONG).show();
        }
    }

    private int parse (){
        try {
            JSONArray ja = new JSONArray(data);
            JSONObject jo = null;

            titles.clear();

            for (int i = 0; i < ja.length(); i++){
                jo=ja.getJSONObject(i);
                String title = jo.getString("post_title");
                titles.add(title);
            }

            return  1;
        } catch (JSONException e) {
            e.printStackTrace();

        }

        return 0;
    }
}

公共类解析器扩展异步任务{
上下文ctx；
字符串数据；
列表视图列表视图；
ArrayList titles=新的ArrayList（）；
公共解析器（上下文ctx、字符串数据、ListView ListView）{
这个.ctx=ctx；
这个。数据=数据；
this.listView=listView；
}
@凌驾
受保护的void onPreExecute（）{
super.onPreExecute（）；
}
@凌驾
受保护的整数doInBackground（Void…params）{
返回this.parse（）；
}
@凌驾
受保护的void onPostExecute（整数）{
onPostExecute（整数）；
如果（整数==1）{
ArrayAdapter=新的ArrayAdapter（ctx，android.R.layout.simple\u list\u item\u 1，标题）；
setAdapter（适配器）；
}否则{
Toast.makeText（ctx，“无法解析”，Toast.LENGTH_LONG.show（）；
}
}
私有整数解析（）{
试一试{
JSONArray ja=新JSONArray（数据）；
JSONObject jo=null；
标题。清除（）；
对于（int i=0；i

日志

03-17 19:09:53.246 13705-13705/com.example.joudialfattal.skillsexchange D/ViewRootImpl:viewPostimeiInputStage进程指针0
03-17 19:09:53.306 13705-13705/com.example.joudialfattal.skillsexchange D/ViewRootImpl:viewPostimeiInputStage进程指针1
03-17 19:09:53.446 13705-13705/com.example.joudialfattal.skillsexchange D/ViewRootImpl:MSG_RESIZED:ci=Rect（0,96-0,1128）vi=Rect（0,96-0,1128）或=1
03-17 19:09:54.296 13705-13705/com.example.joudialfattal.skillsexchange D/ViewRootImpl:#1 mView=com.android.internal.policy.PhoneWindow$DecorView{145fd86 V.E……R……I.0,0,0}
03-17 19:09:54.306 13705-14599/com.example.joudialfattal.skillsexchange I/System.out:（HTTPLog）-静态：isSBSettingEnabled false
03-17 19:09:54.306 13705-14599/com.example.joudialfattal.skillsexchange I/System.out:（HTTPLog）-静态：isSBSettingEnabled false
03-17 19:09:54.306 13705-13705/com.example.joudialfattal.skillsChange W/DisplayListCanvas:DisplayListCanvas在未索引的RenderNode上启动（无mOwningView）
03-17 19:09:54.326 13705-13733/com.example.joudialfattal.skillsexchange D/mali_winsys:EGLint new_window_surface（egl_winsys_display*，void*，eglssurface，EGLConfig，egl_winsys_surface**，egl_color_buffer_format*，EGLBoolean）返回0x3000，[1592x909]-格式：1
03-17 19:09:54.336 13705-13705/com.example.joudialfattal.skillsChange W/DisplayListCanvas:DisplayListCanvas在未索引的RenderNode上启动（无mOwningView）
03-17 19:09:54.376 13705-13705/com.example.joudialfattal.skillsexchange D/ViewRootImpl:MSG_RESIZED_REPORT:ci=Rect（0,0-0,0）vi=Rect（0,0-0,0）或=1
03-17 19:09:54.616 13705-13705/com.example.joudialfattal.skillsexchange D/ViewRootImpl:#3 mView=null
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:org.json.JSONException:输入结束于
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:org.json.JSONTokener.syntaxError（JSONTokener.java:449）
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:org.json.JSONTokener.nextValue（JSONTokener.java:97）
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:org.json.JSONArray.（JSONArray.java:92）
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:org.json.JSONArray.（JSONArray.java:108）
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:at com.example.joudialfattal.skillsexchange.Parser.parse（Parser.java:58）
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:at com.example.joudialfattal.skillsexchange.Parser.doInBackground（Parser.java:39）
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:at com.example.joudialfattal.skillsexchange.Parser.doInBackground（Parser.java:18）
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:at android.os.AsyncTask$2.call（AsyncTask.java:295）
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:at java.util.concurrent.FutureTask.run（FutureTask.java:237）
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:at android.os.AsyncTask$SerialExecutor$1.run（AsyncTask.java:234）
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:at java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1113）
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:at java.util.concurrent.ThreadPoolExecutor$Worker.run（ThreadPoolExecutor.java:588）
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:at java.lang.Thread.run（Thread.java:818）
03-17 19:09:54.696 13705-13705/com.example.joudialfattal.skillsChange E/ViewRootImpl:sendUserActionEvent（）mView==null
03-17 19:09:54.706 13705-13705/com.example.joudialfattal.skillsexchange D/ViewRootImpl:#1 mView=android.widget.LinearLayout{864f1d1 V.E………I.0,0-0,0}
03-17 19:09:54.766 13705-13733/com.example.joudialfattal.skillsexchange D/mali_winsys:EGLint新窗口表面（egl_winsys_display*、void*、eglssurface、EGLConfig、egl_winsys_表面**、egl_颜色缓冲区格式*、EGLBoolean）re
03-17 19:09:53.246 13705-13705/com.example.joudialfattal.skillsexchange D/ViewRootImpl: ViewPostImeInputStage processPointer 0
03-17 19:09:53.306 13705-13705/com.example.joudialfattal.skillsexchange D/ViewRootImpl: ViewPostImeInputStage processPointer 1
03-17 19:09:53.446 13705-13705/com.example.joudialfattal.skillsexchange D/ViewRootImpl: MSG_RESIZED: ci=Rect(0, 96 - 0, 1128) vi=Rect(0, 96 - 0, 1128) or=1
03-17 19:09:54.296 13705-13705/com.example.joudialfattal.skillsexchange D/ViewRootImpl: #1 mView = com.android.internal.policy.PhoneWindow$DecorView{145fd86 V.E...... R.....I. 0,0-0,0}
03-17 19:09:54.306 13705-14599/com.example.joudialfattal.skillsexchange I/System.out: (HTTPLog)-Static: isSBSettingEnabled false
03-17 19:09:54.306 13705-14599/com.example.joudialfattal.skillsexchange I/System.out: (HTTPLog)-Static: isSBSettingEnabled false
03-17 19:09:54.306 13705-13705/com.example.joudialfattal.skillsexchange W/DisplayListCanvas: DisplayListCanvas is started on unbinded RenderNode (without mOwningView)
03-17 19:09:54.326 13705-13733/com.example.joudialfattal.skillsexchange D/mali_winsys: EGLint new_window_surface(egl_winsys_display*, void*, EGLSurface, EGLConfig, egl_winsys_surface**, egl_color_buffer_format*, EGLBoolean) returns 0x3000,  [1592x909]-format:1
03-17 19:09:54.336 13705-13705/com.example.joudialfattal.skillsexchange W/DisplayListCanvas: DisplayListCanvas is started on unbinded RenderNode (without mOwningView)
03-17 19:09:54.376 13705-13705/com.example.joudialfattal.skillsexchange D/ViewRootImpl: MSG_RESIZED_REPORT: ci=Rect(0, 0 - 0, 0) vi=Rect(0, 0 - 0, 0) or=1
03-17 19:09:54.616 13705-13705/com.example.joudialfattal.skillsexchange D/ViewRootImpl: #3 mView = null
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err: org.json.JSONException: End of input at character 0 of 
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:     at org.json.JSONTokener.syntaxError(JSONTokener.java:449)
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:     at org.json.JSONTokener.nextValue(JSONTokener.java:97)
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:     at org.json.JSONArray.<init>(JSONArray.java:92)
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:     at org.json.JSONArray.<init>(JSONArray.java:108)
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:     at com.example.joudialfattal.skillsexchange.Parser.parse(Parser.java:58)
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:     at com.example.joudialfattal.skillsexchange.Parser.doInBackground(Parser.java:39)
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:     at com.example.joudialfattal.skillsexchange.Parser.doInBackground(Parser.java:18)
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:     at android.os.AsyncTask$2.call(AsyncTask.java:295)
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
03-17 19:09:54.636 13705-14614/com.example.joudialfattal.skillsexchange W/System.err:     at java.lang.Thread.run(Thread.java:818)
03-17 19:09:54.696 13705-13705/com.example.joudialfattal.skillsexchange E/ViewRootImpl: sendUserActionEvent() mView == null
03-17 19:09:54.706 13705-13705/com.example.joudialfattal.skillsexchange D/ViewRootImpl: #1 mView = android.widget.LinearLayout{864f1d1 V.E...... ......I. 0,0-0,0}
03-17 19:09:54.766 13705-13733/com.example.joudialfattal.skillsexchange D/mali_winsys: EGLint new_window_surface(egl_winsys_display*, void*, EGLSurface, EGLConfig, egl_winsys_surface**, egl_color_buffer_format*, EGLBoolean) returns 0x3000,  [637x181]-format:1
03-17 19:09:54.776 13705-13705/com.example.joudialfattal.skillsexchange D/ViewRootImpl: MSG_RESIZED_REPORT: ci=Rect(0, 0 - 0, 0) vi=Rect(0, 0 - 0, 0) or=1
03-17 19:09:54.776 13705-13705/com.example.joudialfattal.skillsexchange W/DisplayListCanvas: DisplayListCanvas is started on unbinded RenderNode (without mOwningView)
03-17 19:09:54.806 13705-13733/com.example.joudialfattal.skillsexchange V/RenderScript: 0x7f690b1000 Launching thread(s), CPUs 8
03-17 19:09:58.206 13705-13705/com.example.joudialfattal.skillsexchange D/ViewRootImpl: #3 mView = null
03-17 19:10:28.296 13705-13705/com.example.joudialfattal.skillsexchange W/DisplayListCanvas: DisplayListCanvas is started on unbinded RenderNode (without mOwningView)
03-17 19:10:28.346 13705-13705/com.example.joudialfattal.skillsexchange W/IInputConnectionWrapper: getCursorCapsMode on inactive InputConnection
03-17 19:10:28.516 13705-13705/com.example.joudialfattal.skillsexchange W/IInputConnectionWrapper: getCursorCapsMode on inactive InputConnection
03-17 19:10:28.606 13705-13705/com.example.joudialfattal.skillsexchange W/IInputConnectionWrapper: getExtractedText on inactive InputConnection
03-17 19:10:28.606 13705-13705/com.example.joudialfattal.skillsexchange W/IInputConnectionWrapper: beginBatchEdit on inactive InputConnection
03-17 19:10:28.606 13705-13705/com.example.joudialfattal.skillsexchange W/IInputConnectionWrapper: endBatchEdit on inactive InputConnection
03-17 19:10:28.676 13705-13705/com.example.joudialfattal.skillsexchange V/ActivityThread: updateVisibility : ActivityRecord{6fcff37 token=android.os.BinderProxy@267e99f {com.example.joudialfattal.skillsexchange/com.example.joudialfattal.skillsexchange.FindSkill}} show : true
03-17 19:10:28.716 13705-13705/com.example.joudialfattal.skillsexchange W/IInputConnectionWrapper: getTextBeforeCursor on inactive InputConnection
03-17 19:10:28.716 13705-13705/com.example.joudialfattal.skillsexchange W/IInputConnectionWrapper: getSelectedText on inactive InputConnection
03-17 19:10:28.716 13705-13705/com.example.joudialfattal.skillsexchange W/IInputConnectionWrapper: getTextAfterCursor on inactive InputConnection
03-17 19:10:28.716 13705-13705/com.example.joudialfattal.skillsexchange W/IInputConnectionWrapper: getExtractedText on inactive InputConnection
03-17 19:10:28.716 13705-13705/com.example.joudialfattal.skillsexchange W/IInputConnectionWrapper: beginBatchEdit on inactive InputConnection
03-17 19:10:28.716 13705-13705/com.example.joudialfattal.skillsexchange W/IInputConnectionWrapper: endBatchEdit on inactive InputConnection
03-17 19:10:29.176 13705-13705/com.example.joudialfattal.skillsexchange D/ViewRootImpl: MSG_RESIZED_REPORT: ci=Rect(0, 96 - 0, 0) vi=Rect(0, 96 - 0, 0) or=1