Android：致命的例外MAIN ..應用程序每次崩潰

我想做一個簡單的天氣android應用程序。由於我是Android新手，所以在很多地方我都遇到了問題。這次我想我把我的主要活動和表現搞砸了。我在這裏粘貼整個代碼。如果我出錯，請提供寶貴的建議。Android：致命的例外MAIN ..應用程序每次崩潰

MainActivity

package com.example.checkweather; 

import java.io.IOException; 
import java.util.List; 
import java.util.Locale; 
import java.util.concurrent.ExecutionException; 
import org.json.JSONArray; 
import org.json.JSONException; 
import org.json.JSONObject; 
import android.app.Activity; 
import android.content.Context; 
import android.graphics.Bitmap; 
import android.location.Address; 
import android.location.Criteria; 
import android.location.Geocoder; 
import android.location.Location; 
import android.location.LocationListener; 
import android.location.LocationManager; 
import android.os.Bundle; 
import android.widget.TextView; 
import android.widget.Toast; 


public class MainActivity extends Activity implements LocationListener { 
    private TextView latituteField; 
    private TextView longitudeField; 
    private LocationManager locationManager; 
    private TextView mylocation; 
    private TextView Entry1, Entry2, Entry3, Entry4, Entry5; 
    private JSONObject jobject1, jobject2, jarray, tempjobject; 
    private JSONArray temparray; 
    private String provider, string, city; 
    private String[] maximum = new String[5]; 
    private String[] minimum = new String[5]; 
    private String[] conditions = new String[5]; 

/** Called when the activity is first created. */ 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    latituteField = (TextView) findViewById(R.id.TextView02); 
    longitudeField = (TextView) findViewById(R.id.TextView04); 
    mylocation = (TextView) findViewById(R.id.TextView06); 
    Entry1 = (TextView) findViewById(R.id.day1); 
    Entry2 = (TextView) findViewById(R.id.day2); 
    Entry3 = (TextView) findViewById(R.id.day3); 
    Entry4 = (TextView) findViewById(R.id.day4); 
    Entry5 = (TextView) findViewById(R.id.day5); 

    // Get the location manager 
    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 
    // Define the criteria how to select the locatioin provider -> use 
    // default 
    Criteria criteria = new Criteria(); 
    provider = locationManager.getBestProvider(criteria, false); 
    Location location = locationManager.getLastKnownLocation(provider); 

    // Initialize the location fields 
    if (location != null) { 
     System.out.println("Provider " + provider + " has been selected."); 
     onLocationChanged(location); 
    } else { 
     latituteField.setText("Location not available"); 
     longitudeField.setText("Location not available"); 
    } 
     String result; 
     try { 
      result = new WeatherHttpClient().execute("http://api.wunderground.com/api/796da11422ba3dc2/forecast10day/q/"+city+".json").get(); 

      try { 
       jobject1 = new JSONObject(result); 
      jarray = jobject1.getJSONObject("forecast"); 
      jobject2 = jarray.getJSONObject("simpleforecast"); 
      temparray = jobject2.getJSONArray("forecastday"); 
      string = result; 

      for(int i=0;i<5;i++){ 
       tempjobject= temparray.getJSONObject(i); 
       maximum[i] =tempjobject.getString("high"); 
       minimum[i] = tempjobject.getString("low"); 
       conditions[i] = tempjobject.getString("conditions"); 
      }   
      JSONObject j1 = new JSONObject(maximum[0]); 
      JSONObject j2 = new JSONObject(minimum[0]); 
      JSONObject j3 = new JSONObject(maximum[1]); 
      JSONObject j4 = new JSONObject(minimum[1]); 
      JSONObject j5 = new JSONObject(maximum[2]); 
      JSONObject j6 = new JSONObject(minimum[2]); 
      JSONObject j7 = new JSONObject(maximum[3]); 
      JSONObject j8 = new JSONObject(minimum[3]); 
      JSONObject j9 = new JSONObject(maximum[4]); 
      JSONObject j10 = new JSONObject(minimum[4]); 

      Entry1.setText("Maximum" + j1.getString("fahrenheit")+"°F" + "Minimum" + j2.getString("fahrenheit")+"°F "+ conditions[0]); 
      Entry2.setText("Maximum" + j3.getString("fahrenheit")+"°F" + "Minimum" + j4.getString("fahrenheit")+"°F "+ conditions[1]); 
      Entry3.setText("Maximum" + j5.getString("fahrenheit")+"°F" + "Minimum" + j6.getString("fahrenheit")+"°F "+ conditions[2]); 
      Entry4.setText("Maximum" + j7.getString("fahrenheit")+"°F" + "Minimum" + j8.getString("fahrenheit")+"°F "+ conditions[3]); 
      Entry5.setText("Maximum" + j9.getString("fahrenheit")+"°F" + "Minimum" + j10.getString("fahrenheit")+"°F "+ conditions[4]); 

      } catch (JSONException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 

      } catch (InterruptedException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (ExecutionException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
    } 

    /* Request updates at startup */ 

    @Override 
    protected void onResume() { 
    super.onResume(); 
    locationManager.requestLocationUpdates(provider, 400, 1, this); 
    } 

    /* Remove the locationlistener updates when Activity is paused */ 
    @Override 
    protected void onPause() { 
    super.onPause(); 
    locationManager.removeUpdates(this); 
    } 


    @Override 
    public void onLocationChanged(Location location) { 
    int lat = (int) (location.getLatitude()); 
    int lng = (int) (location.getLongitude()); 
    latituteField.setText(String.valueOf(lat)); 
    longitudeField.setText(String.valueOf(lng)); 
    Geocoder geoCoder1 = new Geocoder(getBaseContext(), Locale.getDefault()); 
    try { 
     String add = ""; 
     List<Address> addresses; 
     List<Address> fromLocation; 

      fromLocation = (List<Address>) geoCoder1.getFromLocation(lat,lng, 1); 

     addresses = fromLocation; 
     if (addresses.size() > 0) 
     { 
      for (int i=0; i<((android.location.Address) addresses.get(0)).getMaxAddressLineIndex();i++) 
       add += ((android.location.Address) addresses.get(0)).getAddressLine(i) + "\n"; 
     } 
     mylocation.setText(String.valueOf(add)); 
     Bundle extras = getIntent().getExtras(); 
     if (extras != null) { 
      city = extras.getString("ZipCode"); 
     } 
     else{ 

      city = ((android.location.Address) addresses.get(0)).getPostalCode(); 
     } 
     Toast.makeText(getBaseContext(), city, Toast.LENGTH_SHORT).show(); 

    } catch (IOException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    }} 



    @Override 
    public void onStatusChanged(String provider, int status, Bundle extras) { 
    // TODO Auto-generated method stub 

    } 

    @Override 
    public void onProviderEnabled(String provider) { 
    Toast.makeText(this, "Enabled new provider " + provider, 
     Toast.LENGTH_SHORT).show(); 

    } 

    @Override 
    public void onProviderDisabled(String provider) { 
    Toast.makeText(this, "Disabled provider " + provider, 
     Toast.LENGTH_SHORT).show(); 
    } 
}

XML文件：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" > 

    <LinearLayout 
     android:id="@+id/linearLayout1" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_marginTop="40dip" 
     android:orientation="horizontal" > 

     <TextView 
      android:id="@+id/TextView01" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_marginLeft="10dip" 
      android:layout_marginRight="5dip" 
      android:text="@string/Lati" 
      android:textSize="20sp" > 
     </TextView> 

     <TextView 
      android:id="@+id/TextView02" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:textSize="20sp" > 
     </TextView> 
    </LinearLayout> 

    <LinearLayout 
     android:id="@+id/linearLayout2" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" > 

     <TextView 
      android:id="@+id/TextView03" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_marginLeft="10dip" 
      android:layout_marginRight="5dip" 
      android:text="@string/Longi" 
      android:textSize="20sp" > 
     </TextView> 

     <TextView 
      android:id="@+id/TextView04" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 

      android:textSize="20sp" > 
     </TextView> 
    </LinearLayout> 

    <LinearLayout 
     android:id="@+id/linearLayout3" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" > 

     <TextView 
      android:id="@+id/TextView05" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_marginLeft="10dip" 
      android:layout_marginRight="5dip" 
      android:text="@string/Locati" 
      android:textSize="20sp" > 
     </TextView> 

     <TextView 
      android:id="@+id/TextView06" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:textSize="20sp" > 
     </TextView> 
    </LinearLayout> 
    <TextView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_marginLeft="10dip" 
       android:layout_marginRight="5dip" 
       android:paddingTop="15dip" 
       android:text="@string/d1" 
       android:textSize="20sp" > 
      </TextView> 

      <TextView 
       android:id="@+id/day1" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="xxxxxxx" 
       android:textSize="20sp" > 
     </TextView> 

      <TextView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_marginLeft="10dip" 
       android:layout_marginRight="5dip" 
       android:paddingTop="15dip" 
       android:text="@string/d2" 
       android:textSize="20sp" > 
      </TextView> 

      <TextView 
       android:id="@+id/day2" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="yyyyyyyyy" 
       android:textSize="20sp" > 
     </TextView> 

      <TextView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_marginLeft="10dip" 
       android:layout_marginRight="5dip" 
       android:paddingTop="15dip" 
       android:text="@string/d3" 
       android:textSize="20sp" > 
      </TextView> 

      <TextView 
       android:id="@+id/day3" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="zzzzzzz" 
       android:textSize="20sp" > 
     </TextView> 

       <TextView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_marginLeft="10dip" 
       android:layout_marginRight="5dip" 
       android:paddingTop="15dip" 
       android:text="@string/d4" 
       android:textSize="20sp" > 
      </TextView> 

      <TextView 
       android:id="@+id/day4" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="zzzzzsdfdszz" 
       android:textSize="20sp" > 
     </TextView> 

       <TextView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_marginLeft="10dip" 
       android:layout_marginRight="5dip" 
       android:paddingTop="15dip" 
       android:text="@string/d5" 
       android:textSize="20sp" > 
      </TextView> 

      <TextView 
       android:id="@+id/day5" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="fdsadfsdf" 
       android:textSize="20sp" > 
     </TextView> 
     </LinearLayout>

登錄貓：

10-17 20:02:20.235: D/ActivityThread(17009): setTargetHeapUtilization:0.25 
10-17 20:02:20.235: D/ActivityThread(17009): setTargetHeapIdealFree:8388608 
10-17 20:02:20.245: D/ActivityThread(17009): setTargetHeapConcurrentStart:2097152 
10-17 20:02:20.395: I/System.out(17009): Provider network has been selected. 
10-17 20:02:20.745: W/dalvikvm(17009): threadid=1: thread exiting with uncaught exception (group=0x41e90438) 
10-17 20:02:20.745: E/AndroidRuntime(17009): FATAL EXCEPTION: main 
10-17 20:02:20.745: E/AndroidRuntime(17009): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.checkweather/com.example.checkweather.MainActivity}: java.lang.NullPointerException 
10-17 20:02:20.745: E/AndroidRuntime(17009): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at android.app.ActivityThread.access$700(ActivityThread.java:143) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1241) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at android.os.Handler.dispatchMessage(Handler.java:99) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at android.os.Looper.loop(Looper.java:137) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at android.app.ActivityThread.main(ActivityThread.java:4950) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at java.lang.reflect.Method.invokeNative(Native Method) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at java.lang.reflect.Method.invoke(Method.java:511) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1004) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:771) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at dalvik.system.NativeStart.main(Native Method) 
10-17 20:02:20.745: E/AndroidRuntime(17009): Caused by: java.lang.NullPointerException 
10-17 20:02:20.745: E/AndroidRuntime(17009): at org.json.JSONTokener.nextCleanInternal(JSONTokener.java:116) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at org.json.JSONTokener.nextValue(JSONTokener.java:94) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at org.json.JSONObject.<init>(JSONObject.java:154) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at org.json.JSONObject.<init>(JSONObject.java:171) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at com.example.checkweather.MainActivity.onCreate(MainActivity.java:94) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at android.app.Activity.performCreate(Activity.java:5179) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094) 
10-17 20:02:20.745: E/AndroidRuntime(17009): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074) 
10-17 20:02:20.745: E/AndroidRuntime(17009): ... 11 more

來源

2013-10-17 Himanshu Adhwaryu

檢查你的數組指數bro。 – Matthew

發佈你的json結果。 –

我無法發佈整個結果。這裏是鏈接 http://api.wunderground.com/api/b097779f7b98c68f/forecast10day/q/20037.json –

你的錯誤是ArrayIndexOutOfBoundsException異常 這意味着你想從它才存在的東西陣列即如果數組的長度是5，那麼你正試圖從陣列中獲得6元。請檢查您的結果，然後根據數組的大小相應地使用循環解析json。

來源

2013-10-17 04:33:27

我做到了這一點，並刪除了這些步驟，但仍然錯誤是相同的 –

在茨艾倫線你從使用索引3數組的值，但該陣列僅具有3個元素，從而所述索引可以是0至2：

JSONObject jObj9 = new JSONObject(high[3]); 
JSONObject jObj10 = new JSONObject(low[3]);

來源

2013-10-17 04:33:57 Szymon

是的你是對的。實際上早些時候我想到了4天的數據。 –

但仍然問題是相同:( –

什麼錯誤，現在 – Szymon

在108線，只是減1的值在for循環的條件部分。

來源

2013-10-17 04:36:10

難道說，但仍然問題是相同:( –

@HimanshuAdhwaryu告訴我，108線。 –

Android：致命的例外MAIN ..應用程序每次崩潰

回答

相關問題