我该如何解决InputEventReceiver错误? [英] how do I resolve InputEventReceiver error?

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问题描述

我在android的创建了一个小程序来同步从云中的数据,但每当我preSS的刷新按钮(用于开发目的)的code不响应.. 在logcat中显示:

02-25 22:57:32.195:W / InputEventReceiver(17762):
试图完成输入事件,但该输入事件接收器具有已
被释放。

在Java code为MainActivity和FragmentActivity类下面给出

 包sunshine.com.example.himanshu.sunshine;

进口android.os.Bundle;
进口android.support.v4.app.Fragment;
进口android.support.v7.app.ActionBarActivity;
进口android.view.Menu;
进口android.view.MenuItem;


公共类MainActivity扩展ActionBarActivity {

    @覆盖
    保护无效的onCreate(包savedInstanceState){
        super.onCreate(savedInstanceState);
        的setContentView(R.layout.activity_main);
        如果(savedInstanceState == NULL){
           。getSupportFragmentManager()的BeginTransaction()加(R.id.container,新ForecastFragment())提交()。 }
    }


    @覆盖
    公共布尔onCreateOptionsMenu(功能菜单){
        //充气菜单;这增加了项目操作栏,如果它是present。
        。getMenuInflater()膨胀(R.menu.menu_main,菜单);
        返回true;
    }

    @覆盖
    公共布尔onOptionsItemSelected(菜单项项){
        //处理动作栏项目点击这里。将操作栏
        //自动在主/向上按钮操作的点击,只要
        //你在AndroidManifest.xml中指定一个父活动。
        INT的id = item.getItemId();
        如果(ID == R.id.action_settings){
            返回true;
        }
        返回super.onOptionsItemSelected(项目);
    }

}
 

包sunshine.com.example.himanshu.sunshine;

 进口android.annotation.TargetApi;


进口android.net.Uri;
进口android.os.AsyncTask;
进口android.os.Bundle;
进口android.support.v4.app.Fragment;
进口android.util.Log;
进口android.view.LayoutInflater;
进口android.view.Menu;
进口android.view.MenuInflater;
进口android.view.MenuItem;
进口android.view.View;
进口android.view.ViewGroup;
进口android.widget.ArrayAdapter;
进口android.widget.ListView;

进口org.json.JSONArray;
进口org.json.JSONException;
进口org.json.JSONObject;

进口java.io.BufferedReader中;
进口java.io.IOException异常;
进口的java.io.InputStream;
进口java.io.InputStreamReader中;
进口java.net.HttpURLConnection中;
进口的java.net.URL;
进口java.text.SimpleDateFormat的;
进口的java.util.ArrayList;
进口java.util.Arrays中;
进口java.util.Date;
进口的java.util.List;

/ **
 *在2015年2月25日创建于人士Himanshu。
 * /

公共类ForecastFragment扩展片段
{
    公共ForecastFragment(){
    }

    @覆盖
    公共无效的onCreate(包savedInstanceState){
        super.onCreate(savedInstanceState);
        setHasOptionsMenu(真正的);
    }

    @覆盖
    公共无效onCreateOptionsMenu(功能菜单,MenuInflater充气){
        inflater.inflate(R.menu.forecast_fragment,菜单);

    }

    @覆盖
    公共布尔onOptionsItemSelected(菜单项项){
        INT的id = item.getItemId();

        如果(ID == R.id.refresh_action)
        {
            FetchWeatherTask取=新FetchWeatherTask();
            fetch.execute(716217);
            返回true;
        }
        返回super.onOptionsItemSelected(项目);
    }

    @覆盖
    公共查看onCreateView(LayoutInflater充气,容器的ViewGroup,
                             捆绑savedInstanceState){
        查看rootView = inflater.inflate(R.layout.fragment_main,集装箱,假);
        字符串forecastArray [] =
           {今天,阳光明媚-23/34,
                明天,雾,67分之45
                周三,小行星三十四分之五十四
                周四 - 阳光明媚-34/56,
                周五,雾,三十四分之四十五
                周六日-四十五分之二十三
                太阳阳光-34/65,
                有一天,阴沉-九十分之七十八
                周六日-45分之23
                周三,小行星三十四分之五十四
                今天,阳光明媚-23/34号};
        名单<字符串> weekForecast =新的ArrayList<字符串>(Arrays.asList(forecastArray));
        ArrayAdapter<字符串> mForecastAdapter =新的ArrayAdapter<字符串>(getActivity(),R.layout.list_item_forecast,R.id.list_item_forecast_textview,weekForecast);
        ListView控件的ListView =(ListView控件)rootView.findViewById(R.id.listview_forecast);
        listView.setAdapter(mForecastAdapter);


        返回rootView;
    }

    公共类FetchWeatherTask扩展的AsyncTask<字符串,太虚,太虚> {

        私人最终字符串LOG_TAG = FetchWeatherTask.class.getSimpleName();

        @覆盖
        保护无效doInBackground(字符串... PARAMS)
        {
            如果(params.length == 0)
                返回null;

            //这两个需要在try / catch语句外声明
            //使他们可以在关闭finally块。
            HttpURLConnection类的URLConnection = NULL;
            BufferedReader中读= NULL;

            //将包含原始JSON响应为字符串。
            字符串forecastJsonStr = NULL;

            尝试 {
                //构造的URL OpenWeatherMap查询
                //可能的参数是缴费在OWM的预测API页面,在
                // http://openweathermap.org/API#forecast
                字符串格式=JSON;
                字符串单位=指标;
                INT天= 7;
                最后弦乐SURL =htt​​p://api.openweathermap.org/data/2.5/forecast/daily?;
                最后串P code =Q;
                最终的字符串模式=模式;
                最后弦乐单位=单位;
                最后弦乐daysy =CNT;
                乌里urlbulilt = Uri.parse(SURL).buildUpon()。appendQueryParameter(P code,则params [0])
                        .appendQueryParameter(模式,格式)
                        .appendQueryParameter(台,个)
                        .appendQueryParameter(daysy,Integer.toString(天))建立()。
                网址URL =新的URL(urlbulilt.toString());



                //创建请求OpenWeatherMap,并打开连接
                的URLConnection =(HttpURLConnection类)url.openConnection();
                urlConnection.setRequestMethod(GET);
                urlConnection.connect();

                //读取输入流转换为字符串
                InputStream中的InputStream = urlConnection.getInputStream();
                StringBuffer的缓冲区=新的StringBuffer();
                如果(的InputStream == NULL){
                    // 没事做。
                    返回null;
                }
                读者=新的BufferedReader(新的InputStreamReader(InputStream中));

                串线;
                而((行= reader.readLine())!= NULL){
                    //因为它是JSON,增加一个新行是没有必要的(不会影响解析)
                    //但它确实使调试*很多*容易,如果你打印出完成
                    //缓冲区进行调试。
                    buffer.append(行+\ N);
                }

                如果(buffer.length()== 0){
                    //流是空的。没有点解析。
                    返回null;
                }
                forecastJsonStr = buffer.toString();
            }赶上(IOException异常E){
                Log.e(LOG_TAG,错误,E);
                //如果code没有顺利拿到天气数据,还有在attemping没有意义
                //解析它。
                返回null;
            } 最后 {
                如果(URLConnection的!= NULL){
                    urlConnection.disconnect();
                }
                如果(读者!= NULL){
                    尝试 {
                        reader.close();
                    }赶上(最终IOException异常E){
                        Log.e(LOG_TAG,错误收盘流,E);
                    }
                }
            }
            返回null;
        }
    }
}
 

解决方案

我想这是因为你的提取对象是一个局部变量的onOptionsItemSelected()方法,通过AsyncTask的完成它已经被垃圾回收的时间。

尝试使其成为一个字段,然后在onOptionsItemSelected分配给它()方法

 公共类ForecastFragment扩展片段{

    私人FetchWeatherTask获取;

    公共ForecastFragment(){
    }
 

...

然后

  @覆盖
公共布尔onOptionsItemSelected(菜单项项){
    INT的id = item.getItemId();

    如果(ID == R.id.refresh_action)
    {
        取=新FetchWeatherTask();
        fetch.execute(716217);
        返回true;
    }
    返回super.onOptionsItemSelected(项目);
}
 

现在你取的对象应该还是围绕AsyncTask的完成时。

I have created a small program in android to sync the data from the cloud but whenever I press the refresh button (for developing purposes) the code does not responds.. The Logcat shows:

02-25 22:57:32.195: W/InputEventReceiver(17762): 
Attempted to finish an input event but the input event receiver has already 
been disposed.

The java code for the MainActivity and the FragmentActivity classes are given below

package sunshine.com.example.himanshu.sunshine;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;


public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        if (savedInstanceState == null) {
           getSupportFragmentManager().beginTransaction().add(R.id.container, new ForecastFragment()).commit();       }
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

}

package sunshine.com.example.himanshu.sunshine;

import android.annotation.TargetApi;


import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;

/**
 * Created by Himanshu on 2/25/2015.
 */

public class ForecastFragment extends Fragment
{
    public ForecastFragment() {
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setHasOptionsMenu(true);
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        inflater.inflate(R.menu.forecast_fragment,menu);

    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id=item.getItemId();

        if(id==R.id.refresh_action)
        {
            FetchWeatherTask fetch=new FetchWeatherTask();
            fetch.execute("716217");
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_main, container, false);
        String forecastArray[] =
           {    "Today-sunny-23/34",
                "Tomorrow-foggy-45/67",
                "Wed-asteroid-54/34",
                "Thursday--sunny-34/56",
                "Fri-foggy-45/34"
                , "Sat-day-23/45"
                , "Sun-Sunny-34/65",
                "Someday-gloomy-78/90",
                "Sat-day-23/45",
                "Wed-asteroid-54/34",
                "Today-sunny-23/34"        };
        List<String> weekForecast = new ArrayList<String>(Arrays.asList(forecastArray));
        ArrayAdapter<String> mForecastAdapter = new ArrayAdapter<String>(getActivity(), R.layout.list_item_forecast, R.id.list_item_forecast_textview, weekForecast);
        ListView listView = (ListView) rootView.findViewById(R.id.listview_forecast);
        listView.setAdapter(mForecastAdapter);


        return rootView;
    }

    public class FetchWeatherTask extends AsyncTask<String, Void, Void> {

        private final String LOG_TAG = FetchWeatherTask.class.getSimpleName();

        @Override
        protected Void doInBackground(String... params)
        {
            if(params.length==0)
                return null;

            // These two need to be declared outside the try/catch
            // so that they can be closed in the finally block.
            HttpURLConnection urlConnection = null;
            BufferedReader reader = null;

            // Will contain the raw JSON response as a string.
            String forecastJsonStr = null;

            try {
                // Construct the URL for the OpenWeatherMap query
                // Possible parameters are avaiable at OWM's forecast API page, at
                // http://openweathermap.org/API#forecast
                String format="json";
                String unit="metric";
                int days=7;
                final String surl="http://api.openweathermap.org/data/2.5/forecast/daily?";
                final String pcode="q";
                final String mode="mode";
                final String units="units";
                final String daysy="cnt";
                Uri urlbulilt=Uri.parse(surl).buildUpon().appendQueryParameter(pcode,params[0])
                        .appendQueryParameter(mode,format)
                        .appendQueryParameter(units,unit)
                        .appendQueryParameter(daysy,Integer.toString(days)).build();
                URL url=new URL(urlbulilt.toString());



                // Create the request to OpenWeatherMap, and open the connection
                urlConnection = (HttpURLConnection) url.openConnection();
                urlConnection.setRequestMethod("GET");
                urlConnection.connect();

                // Read the input stream into a String
                InputStream inputStream = urlConnection.getInputStream();
                StringBuffer buffer = new StringBuffer();
                if (inputStream == null) {
                    // Nothing to do.
                    return null;
                }
                reader = new BufferedReader(new InputStreamReader(inputStream));

                String line;
                while ((line = reader.readLine()) != null) {
                    // Since it's JSON, adding a newline isn't necessary (it won't affect parsing)
                    // But it does make debugging a *lot* easier if you print out the completed
                    // buffer for debugging.
                    buffer.append(line + "\n");
                }

                if (buffer.length() == 0) {
                    // Stream was empty.  No point in parsing.
                    return null;
                }
                forecastJsonStr = buffer.toString();
            } catch (IOException e) {
                Log.e(LOG_TAG, "Error ", e);
                // If the code didn't successfully get the weather data, there's no point in attemping
                // to parse it.
                return null;
            } finally {
                if (urlConnection != null) {
                    urlConnection.disconnect();
                }
                if (reader != null) {
                    try {
                        reader.close();
                    } catch (final IOException e) {
                        Log.e(LOG_TAG, "Error closing stream", e);
                    }
                }
            }
            return null;
        }
    }
}

解决方案

I think this is because your fetch object is a local variable to the onOptionsItemSelected() method, by the time the AsyncTask completes it has already been garbage collected.

Try making it a field and then assigning it in the onOptionsItemSelected() method

public class ForecastFragment extends Fragment {

    private FetchWeatherTask fetch;

    public ForecastFragment() {
    }

...

and then

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id=item.getItemId();

    if(id==R.id.refresh_action)
    {
        fetch=new FetchWeatherTask();
        fetch.execute("716217");
        return true;
    }
    return super.onOptionsItemSelected(item);
}

now your fetch object should still be around when the AsyncTask completes.

这篇关于我该如何解决InputEventReceiver错误?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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