点击刷新菜单项时，我继续收到logcat错误信息：
com.example.android.sunshine.app W / InputEventReceiver：尝试过 完成输入事件但输入事件接收器已经完成 处置。 com.example.android.sunshine.app E / ViewRootImpl： sendUserActionEvent（）mView == null
我在Samsung J7 android版本5.1.1上收到此错误 我也尝试了nexus 7，每次选择菜单项时都会出现以下错误。
完成输入事件，但输入事件接收器已经完成 地布置。
这是我的片段代码
package com.example.android.sunshine.app;
/**
* Created by Saumya on 2/10/2016.
*/
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 java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
/**
* A placeholder fragment containing a simple view.
*/
public class ForecastFragment extends Fragment {
public ForecastFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
String[] forecasts = {"Today-Sunny-88/63",
"Tomorrow-Foggy-78/66",
"Saturday-Cloudy-72/63",
"Sunday-Rainy-74/61",
"Monday-Foggy-70/46",
"Tuesday-Sunny-76/68",
"Tomorrow-Foggy-78/66",
"Saturday-Cloudy-72/63",
"Sunday-Rainy-74/61",
"Monday-Foggy-70/46",
"Tuesday-Sunny-76/68"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(),
R.layout.list_item_forecast,
R.id.list_item_forecast_textview,
forecasts);
ListView listview = (ListView) rootView.findViewById(R.id.listview_forecast);
listview.setAdapter(adapter);
return rootView;
}
public class FetchWeatherTask extends AsyncTask<Void, Void, Void> {
private final String Log_Tag = FetchWeatherTask.class.getSimpleName();
protected Void doInBackground(Void... params) {
// 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 available at OWM's forecast API page, at
// http://openweathermap.org/API#forecast
String baseUrl = "http://api.openweathermap.org/data/2.5/forecast/daily?zip=110077,in&mode=json&units=metric&cnt=7";
String apiKey = "&APPID=" + BuildConfig.OPEN_WEATHER_MAP_API_KEY;
URL url = new URL(baseUrl.concat(apiKey));
// 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.
//forecastJsonStr = null;
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.
//forecastJsonStr = null;
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 attempting
// to parse it.
//forecastJsonStr = null;
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);
}
}
}
Log.v(Log_Tag, "Forecast JSON string" + forecastJsonStr);
return null;
}
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater){
inflater.inflate(R.menu.forecastfragment, menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if(id == R.id.action_refresh){
new FetchWeatherTask().execute();
return true;
}
return super.onOptionsItemSelected(item);
}
}
这是我的MainActivity.java
package com.example.android.sunshine.app;
import android.os.Bundle;
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.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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_refresh) {
return true;
}
return super.onOptionsItemSelected(item);
}
}