1

I m particularly new in programming, and not getting to figure out the error, whenever i run it, either on emulator or on mobile, its says, App has stopped working. please help me figure it out thanx in advance

Main Activity

package com.example.android.sunshine.app;

import android.annotation.TargetApi;
import android.support.v4.app.Fragment;
import android.os.Build;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

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.util.ArrayList;
import java.util.Arrays;
    import java.util.List;

    public class MainActivity extends AppCompatActivity {

    @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_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

ForecastFragement

package com.example.android.sunshine.app;

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.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;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * Created by Nabahat on 7/8/2015.
 */
public class ForecastFragment extends Fragment {

    public ForecastFragment(){}

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_main, container, false);
        String[] forecastArray = {
                "Today - Sunny - 88/63",
                "Tomorrow - Foggy - 70/40",
                "Weds - Cloudy - 72/63",
                "Thurs - Asteroids - 75/65",
                "Fri - Heavy Rain - 65/56",
                "Sat - HELP TRAPPED IN WEATHERSTATION - 60/51",
                "Sun - Sunny - 80/68"
        };

        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<Void, Void, Void> {
        private final String LOG_TAG = FetchWeatherTask.class.getSimpleName();

        @Override
        protected Void doInBackground(Void... params){
            HttpURLConnection urlConnection = null;
            BufferedReader reader = null;
            String forecastJsonStr = null;

            try {
                URL url = new URL("http://api.openweathermap.org/data/2.5/forecast/daily?q=94043&mode=json&units=metric&cnt=7");
                urlConnection = (HttpURLConnection) url.openConnection();
                urlConnection.setRequestMethod("GET");
                urlConnection.connect();

                InputStream inputStream = urlConnection.getInputStream();
                StringBuffer buffer = new StringBuffer();
                if (inputStream == null) {
                    return null;
                }
                reader = new BufferedReader(new InputStreamReader(inputStream));

                String line;
                while ((line = reader.readLine()) != null) {
                    buffer.append(line + "\n");
                }

                if (buffer.length() == 0) {
                    return null;
                }
                forecastJsonStr = buffer.toString();
            } catch (IOException e) {
                Log.e(LOG_TAG, "Error ", e);
                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;
        }
    }
}

Activity_main.xml

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/fragment"
    android:name="com.example.android.sunshine.app.MainActivity"
    tools:layout="@layout/fragment_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

AndroidManifest

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.android.sunshine.app" >

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Fragment_main.xml

<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="64dp"
    android:paddingRight="64dp"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.example.sunshine.app.MainActivityFragment$PlaceholderFragment"
    android:id="@+id/container">

    <ListView
        android:id="@+id/listview_forecast"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</FrameLayout>

here is log

02-04 07:12:41.022  11478-11478/? E/libEGL﹕ call to OpenGL ES API with no current context (logged once per thread)
02-04 07:17:25.447  12449-12449/? E/Trace﹕ error opening trace file: No such file or directory (2)
02-04 07:17:27.697  12474-12474/? E/Trace﹕ error opening trace file: No such file or directory (2)
02-04 07:17:28.202  12492-12492/? E/Trace﹕ error opening trace file: No such file or directory (2)
02-04 07:17:28.313  12506-12506/? E/Trace﹕ error opening trace file: No such file or directory (2)
02-04 07:17:28.457  12524-12524/? E/Trace﹕ error opening trace file: No such file or directory (2)
02-04 07:17:28.706  12547-12547/? E/Trace﹕ error opening trace file: No such file or directory (2)
02-04 07:17:28.802  12547-12553/? E/jdwp﹕ Failed sending reply to debugger: Broken pipe
02-04 07:17:28.853  12547-12547/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.android.sunshine.app/com.example.android.sunshine.app.MainActivity}: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2351)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2403)
            at android.app.ActivityThread.access$600(ActivityThread.java:165)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
            at android.os.Handler.dispatchMessage(Handler.java:107)
            at android.os.Looper.loop(Looper.java:194)
            at android.app.ActivityThread.main(ActivityThread.java:5370)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:466)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
            at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:249)
            at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:106)
            at com.example.android.sunshine.app.MainActivity.onCreate(MainActivity.java:34)
            at android.app.Activity.performCreate(Activity.java:5122)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2315)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2403)
            at android.app.ActivityThread.access$600(ActivityThread.java:165)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
            at android.os.Handler.dispatchMessage(Handler.java:107)
            at android.os.Looper.loop(Looper.java:194)
            at android.app.ActivityThread.main(ActivityThread.java:5370)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.ClassCastException: com.example.android.sunshine.app.MainActivity cannot be cast to android.app.Fragment
            at android.app.Fragment.instantiate(Fragment.java:585)
            at android.app.Fragment.instantiate(Fragment.java:560)
            at android.app.Activity.onCreateView(Activity.java:4727)
            at android.support.v7.app.AppCompatDelegateImplV11.callActivityOnCreateView(AppCompatDelegateImplV11.java:41)
            at android.support.v7.app.AppCompatDelegateImplV7.onCreateView(AppCompatDelegateImplV7.java:826)
            at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:675)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:466)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
            at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:249)
            at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:106)
            at com.example.android.sunshine.app.MainActivity.onCreate(MainActivity.java:34)
            at android.app.Activity.performCreate(Activity.java:5122)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2315)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2403)
            at android.app.ActivityThread.access$600(ActivityThread.java:165)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
            at android.os.Handler.dispatchMessage(Handler.java:107)
            at android.os.Looper.loop(Looper.java:194)
            at android.app.ActivityThread.main(ActivityThread.java:5370)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
            at dalvik.system.NativeStart.main(Native Method)
02-04 07:17:29.027  12563-12563/? E/Trace﹕ error opening trace file: No such file or directory (2)
02-04 07:17:29.361  12580-12580/? E/Trace﹕ error opening trace file: No such file or directory (2)
02-04 07:17:29.550  12599-12599/? E/Trace﹕ error opening trace file: No such file or directory (2)
02-04 07:17:29.609  12612-12612/? E/Trace﹕ error opening trace file: No such file or directory (2)
02-04 07:17:32.472  12639-12639/? E/Trace﹕ error opening trace file: No such file or directory (2)
02-04 07:17:34.982      493-511/? E/KeyguardUpdateMonitor﹕ Object tried to add another callback
    java.lang.Exception: Called by
            at com.android.internal.policy.impl.keyguard.KeyguardUpdateMonitor.registerCallback(KeyguardUpdateMonitor.java:1108)
            at com.android.internal.policy.impl.keyguard.KeyguardSelectorView.onResume(KeyguardSelectorView.java:331)
            at com.android.internal.policy.impl.keyguard.KeyguardHostView.onScreenTurnedOn(KeyguardHostView.java:1118)
            at com.android.internal.policy.impl.keyguard.KeyguardViewManager.onScreenTurnedOn(KeyguardViewManager.java:403)
            at com.android.internal.policy.impl.keyguard.KeyguardViewMediator.handleNotifyScreenOn(KeyguardViewMediator.java:1813)
            at com.android.internal.policy.impl.keyguard.KeyguardViewMediator.access$2400(KeyguardViewMediator.java:106)
            at com.android.internal.policy.impl.keyguard.KeyguardViewMediator$4.handleMessage(KeyguardViewMediator.java:1449)
            at android.os.Handler.dispatchMessage(Handler.java:107)
            at android.os.Looper.loop(Looper.java:194)
            at android.os.HandlerThread.run(HandlerThread.java:60)
02-04 07:17:35.083     120-1870/? E/AudioMTKHardware﹕ setCommonParameters() still have param.size() = 1, remain param = "screen_state=on"
02-04 07:17:41.110  12672-12672/com.example.android.sunshine.app E/Trace﹕ error opening trace file: No such file or directory (2)
02-04 07:17:41.247  12672-12672/com.example.android.sunshine.app E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.android.sunshine.app/com.example.android.sunshine.app.MainActivity}: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2351)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2403)
            at android.app.ActivityThread.access$600(ActivityThread.java:165)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
            at android.os.Handler.dispatchMessage(Handler.java:107)
            at android.os.Looper.loop(Looper.java:194)
            at android.app.ActivityThread.main(ActivityThread.java:5370)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:466)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
            at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:249)
            at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:106)
            at com.example.android.sunshine.app.MainActivity.onCreate(MainActivity.java:34)
            at android.app.Activity.performCreate(Activity.java:5122)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2315)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2403)
            at android.app.ActivityThread.access$600(ActivityThread.java:165)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
            at android.os.Handler.dispatchMessage(Handler.java:107)
            at android.os.Looper.loop(Looper.java:194)
            at android.app.ActivityThread.main(ActivityThread.java:5370)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.ClassCastException: com.example.android.sunshine.app.MainActivity cannot be cast to android.app.Fragment
            at android.app.Fragment.instantiate(Fragment.java:585)
            at android.app.Fragment.instantiate(Fragment.java:560)
            at android.app.Activity.onCreateView(Activity.java:4727)
            at android.support.v7.app.AppCompatDelegateImplV11.callActivityOnCreateView(AppCompatDelegateImplV11.java:41)
            at android.support.v7.app.AppCompatDelegateImplV7.onCreateView(AppCompatDelegateImplV7.java:826)
            at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:675)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:466)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
            at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:249)
            at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:106)
            at com.example.android.sunshine.app.MainActivity.onCreate(MainActivity.java:34)
            at android.app.Activity.performCreate(Activity.java:5122)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1146)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2315)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2403)
            at android.app.ActivityThread.access$600(ActivityThread.java:165)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
            at android.os.Handler.dispatchMessage(Handler.java:107)
            at android.os.Looper.loop(Looper.java:194)
            at android.app.ActivityThread.main(ActivityThread.java:5370)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
            at dalvik.system.NativeStart.main(Native Method)
02-04 07:17:41.285      493-513/? E/AppErrorDialog﹕ Failed to get ILowStorageHandle instance
02-04 07:17:45.682      120-438/? E/﹕ AudioCloseDumpPCMFile file== NULL
02-04 07:17:45.682      120-438/? E/﹕ AudioCloseDumpPCMFile file== NULL
02-04 07:17:50.354      645-645/? E/wpa_supplicant﹕ Sorted scan results
02-04 07:17:50.354      645-645/? E/wpa_supplicant﹕ f4:3e:61:92:4b:21 freq=2462 qual=0 noise=0 level=-83 flags=0xb
02-04 07:17:50.354      645-645/? E/wpa_supplicant﹕ IEs
02-04 07:17:50.354      645-645/? E/wpa_supplicant﹕
user102303
  • 27
  • 3
  • You need to post the logcat but [Here is an answer I gave on using AsyncTask](http://stackoverflow.com/questions/18898039/using-asynctask/18898105#18898105) – codeMagic Jul 07 '15 at 23:42
  • You aren't actually using your async task, so the problem isn't there. Look in your stack trace. – Gabe Sechan Jul 07 '15 at 23:59
  • added the log, as well as, i was basicaly following the tutorial, and at this stage, the could had to run on device, showing the data which was stored in array, this aint happening here – user102303 Jul 08 '15 at 00:01

2 Answers2

2

The issue is that in your main activity_main.xml you have used a fragment tag which loads the required fragment, BUT you have used the wrong name of the fragment. you have used android:name="com.example.android.sunshine.app.MainActivity" you should use android:name="com.example.android.sunshine.app.ForecastFragment

since you are doing it in xml remove the transaction code written inside onCreate().

It has nothing to do with async task

Aniruddha K.M
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  • 52
0

I'm also taking the same course. Commenting out the below lines did the trick for me -

if (savedInstanceState == null)
{
         getSupportFragmentManager().beginTransaction()
         .add(R.id.container, new ForecastFragment())
         .commit();

         }

But this is not the right solution. The app works by doing this but these lines exist in the course code. Maybe you could get a hint of what is going wrong with the code above!

Shreyas
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