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检查其是否连接与否

2014-01-30 134 views
0

是这个..检查其是否连接与否

01-30 06:34:43.633: D/AndroidRuntime(1228): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<< 
    01-30 06:34:43.643: D/AndroidRuntime(1228): CheckJNI is ON 
    01-30 06:34:43.703: D/dalvikvm(1228): Trying to load lib libjavacore.so 0x0 
    01-30 06:34:43.713: D/dalvikvm(1228): Added shared lib libjavacore.so 0x0 
    01-30 06:34:43.733: D/dalvikvm(1228): Trying to load lib libnativehelper.so 0x0 
    01-30 06:34:43.743: D/dalvikvm(1228): Added shared lib libnativehelper.so 0x0 
    01-30 06:34:43.743: D/dalvikvm(1228): No JNI_OnLoad found in libnativehelper.so 0x0, skipping init 
    01-30 06:34:43.933: D/dalvikvm(1228): Note: class Landroid/app/ActivityManagerNative; has 179 unimplemented (abstract) methods 
    01-30 06:34:44.463: E/memtrack(1228): Couldn't load memtrack module (No such file or directory) 
    01-30 06:34:44.463: E/android.os.Debug(1228): failed to load memtrack module: -2 
    01-30 06:34:44.743: D/AndroidRuntime(1228): Calling main entry com.android.commands.pm.Pm 
    01-30 06:34:44.783: D/AndroidRuntime(1228): Shutting down VM 
    01-30 06:34:44.783: D/dalvikvm(1228): Debugger has detached; object registry had 1 entries 
    01-30 06:34:45.503: D/AndroidRuntime(1239): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<< 
    01-30 06:34:45.503: D/AndroidRuntime(1239): CheckJNI is ON 
    01-30 06:34:45.563: D/dalvikvm(1239): Trying to load lib libjavacore.so 0x0 
    01-30 06:34:45.573: D/dalvikvm(1239): Added shared lib libjavacore.so 0x0 
    01-30 06:34:45.593: D/dalvikvm(1239): Trying to load lib libnativehelper.so 0x0 
    01-30 06:34:45.593: D/dalvikvm(1239): Added shared lib libnativehelper.so 0x0 
    01-30 06:34:45.603: D/dalvikvm(1239): No JNI_OnLoad found in libnativehelper.so 0x0, skipping init 
    01-30 06:34:45.863: D/dalvikvm(1239): Note: class Landroid/app/ActivityManagerNative; has 179 unimplemented (abstract) methods 
    01-30 06:34:46.373: E/memtrack(1239): Couldn't load memtrack module (No such file or directory) 
    01-30 06:34:46.373: E/android.os.Debug(1239): failed to load memtrack module: -2 
    01-30 06:34:46.653: D/AndroidRuntime(1239): Calling main entry com.android.commands.am.Am 
    01-30 06:34:46.723: I/ActivityManager(379): START u0 {act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.ptuxiaki.stockpredictions/.MainActivity} from pid 1239 
    01-30 06:34:46.763: E/gralloc_goldfish(50): gralloc_alloc: Mismatched usage flags: 328 x 583, usage 333 
    01-30 06:34:46.763: W/GraphicBufferAllocator(50): alloc(328, 583, 1, 00000333, ...) failed -22 (Invalid argument) 
    01-30 06:34:46.763: E/(50): GraphicBufferAlloc::createGraphicBuffer(w=328, h=583) failed (Invalid argument), handle=0x0 
    01-30 06:34:46.763: E/BufferQueue(379): [ScreenshotClient] dequeueBuffer: SurfaceComposer::createGraphicBuffer failed 
    01-30 06:34:46.763: W/WindowManager(379): Screenshot failure taking screenshot for (328x583) to layer 21005 
    01-30 06:34:46.783: D/AndroidRuntime(1239): Shutting down VM 
    01-30 06:34:46.803: D/jdwp(1239): Got wake-up signal, bailing out of select 
    01-30 06:34:46.803: D/dalvikvm(1239): Debugger has detached; object registry had 1 entries 
    01-30 06:34:46.833: D/dalvikvm(1250): Not late-enabling CheckJNI (already on) 
    01-30 06:34:46.833: I/ActivityManager(379): Start proc com.ptuxiaki.stockpredictions for activity com.ptuxiaki.stockpredictions/.MainActivity: pid=1250 uid=10054 gids={50054, 3003} 
    01-30 06:34:47.513: D/dalvikvm(1250): GC_FOR_ALLOC freed 47K, 4% free 3137K/3256K, paused 57ms, total 59ms 
    01-30 06:34:47.533: I/dalvikvm-heap(1250): Grow heap (frag case) to 4.202MB for 1127536-byte allocation 
    01-30 06:34:47.603: D/dalvikvm(1250): GC_FOR_ALLOC freed 2K, 3% free 4235K/4360K, paused 71ms, total 71ms 
    01-30 06:34:47.813: D/AndroidRuntime(1250): Shutting down VM 
    01-30 06:34:47.813: W/dalvikvm(1250): threadid=1: thread exiting with uncaught exception (group=0xb1b06ba8) 
    01-30 06:34:47.823: E/AndroidRuntime(1250): FATAL EXCEPTION: main 
    01-30 06:34:47.823: E/AndroidRuntime(1250): Process: com.ptuxiaki.stockpredictions, PID: 1250 
    01-30 06:34:47.823: E/AndroidRuntime(1250): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ptuxiaki.stockpredictions/com.ptuxiaki.stockpredictions.MainActivity}: java.lang.NullPointerException 
    01-30 06:34:47.823: E/AndroidRuntime(1250):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195) 
    01-30 06:34:47.823: E/AndroidRuntime(1250):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 
    01-30 06:34:47.823: E/AndroidRuntime(1250):  at android.app.ActivityThread.access$800(ActivityThread.java:135) 
    01-30 06:34:47.823: E/AndroidRuntime(1250):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
    01-30 06:34:47.823: E/AndroidRuntime(1250):  at android.os.Handler.dispatchMessage(Handler.java:102) 
    01-30 06:34:47.823: E/AndroidRuntime(1250):  at android.os.Looper.loop(Looper.java:136) 
    01-30 06:34:47.823: E/AndroidRuntime(1250):  at android.app.ActivityThread.main(ActivityThread.java:5017) 
    01-30 06:34:47.823: E/AndroidRuntime(1250):  at java.lang.reflect.Method.invokeNative(Native Method) 
    01-30 06:34:47.823: E/AndroidRuntime(1250):  at java.lang.reflect.Method.invoke(Method.java:515) 
    01-30 06:34:47.823: E/AndroidRuntime(1250):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
    01-30 06:34:47.823: E/AndroidRuntime(1250):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
    01-30 06:34:47.823: E/AndroidRuntime(1250):  at dalvik.system.NativeStart.main(Native Method) 
    01-30 06:34:47.823: E/AndroidRuntime(1250): Caused by: java.lang.NullPointerException 
    01-30 06:34:47.823: E/AndroidRuntime(1250):  at com.ptuxiaki.stockpredictions.MainActivity.onCreate(MainActivity.java:55) 
    01-30 06:34:47.823: E/AndroidRuntime(1250):  at android.app.Activity.performCreate(Activity.java:5231) 
    01-30 06:34:47.823: E/AndroidRuntime(1250):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
    01-30 06:34:47.823: E/AndroidRuntime(1250):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159) 
    01-30 06:34:47.823: E/AndroidRuntime(1250):  ... 11 more 
    01-30 06:34:47.823: W/ActivityManager(379): Force finishing activity com.ptuxiaki.stockpredictions/.MainActivity 
    01-30 06:34:48.013: D/dalvikvm(1250): GC_FOR_ALLOC freed 217K, 6% free 4532K/4816K, paused 22ms, total 22ms 
    01-30 06:34:48.243: I/WindowManager(379): Screenshot max retries 4 of Token{b215f238 ActivityRecord{b2373780 u0 com.ptuxiaki.stockpredictions/.MainActivity t6 f}} appWin=Window{b22ec3a8 u0 Starting com.ptuxiaki.stockpredictions} drawState=4 
    01-30 06:34:48.243: W/WindowManager(379): Screenshot failure taking screenshot for (720x1280) to layer 21010 
    01-30 06:34:48.773: W/ActivityManager(379): Activity pause timeout for ActivityRecord{b2373780 u0 com.ptuxiaki.stockpredictions/.MainActivity t6 f} 
    01-30 06:34:48.883: W/EGL_emulation(540): eglSurfaceAttrib not implemented 
    01-30 06:34:49.933: D/LightsService(379): Excessive delay setting light: 218ms 
    01-30 06:34:50.033: E/SoundPool(379): error loading /system/media/audio/ui/Effect_Tick.ogg 
    01-30 06:34:50.033: W/AudioService(379): Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg 
    01-30 06:34:50.033: E/SoundPool(379): error loading /system/media/audio/ui/Effect_Tick.ogg 
    01-30 06:34:50.033: W/AudioService(379): Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg 
    01-30 06:34:50.033: E/SoundPool(379): error loading /system/media/audio/ui/Effect_Tick.ogg 
    01-30 06:34:50.033: W/AudioService(379): Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg 
    01-30 06:34:50.053: E/SoundPool(379): error loading /system/media/audio/ui/Effect_Tick.ogg 
    01-30 06:34:50.053: W/AudioService(379): Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg 
    01-30 06:34:50.053: E/SoundPool(379): error loading /system/media/audio/ui/Effect_Tick.ogg 
    01-30 06:34:50.053: W/AudioService(379): Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg 
    01-30 06:34:50.053: E/SoundPool(379): error loading /system/media/audio/ui/KeypressStandard.ogg 
    01-30 06:34:50.053: W/AudioService(379): Soundpool could not load file: /system/media/audio/ui/KeypressStandard.ogg 
    01-30 06:34:50.063: W/InputMethodManagerService(379): Window already focused, ignoring focus gain of: [email protected] attribute=null, token = [email protected] 
    01-30 06:34:50.073: E/SoundPool(379): error loading /system/media/audio/ui/KeypressSpacebar.ogg 
    01-30 06:34:50.073: W/AudioService(379): Soundpool could not load file: /system/media/audio/ui/KeypressSpacebar.ogg 
    01-30 06:34:50.073: E/SoundPool(379): error loading /system/media/audio/ui/KeypressDelete.ogg 
    01-30 06:34:50.073: W/AudioService(379): Soundpool could not load file: /system/media/audio/ui/KeypressDelete.ogg 
    01-30 06:34:50.073: E/SoundPool(379): error loading /system/media/audio/ui/KeypressReturn.ogg 
    01-30 06:34:50.073: W/AudioService(379): Soundpool could not load file: /system/media/audio/ui/KeypressReturn.ogg 
    01-30 06:34:50.083: E/SoundPool(379): error loading /system/media/audio/ui/KeypressInvalid.ogg 
    01-30 06:34:50.083: W/AudioService(379): Soundpool could not load file: /system/media/audio/ui/KeypressInvalid.ogg 
    01-30 06:34:50.083: W/AudioService(379): onLoadSoundEffects(), Error -1 while loading samples 
    01-30 06:34:50.083: I/Process(1250): Sending signal. PID: 1250 SIG: 9 
    01-30 06:34:50.103: D/LightsService(379): Excessive delay setting light: 124ms 
    01-30 06:34:50.113: I/ActivityManager(379): Process com.ptuxiaki.stockpredictions (pid 1250) has died. 
    01-30 06:34:50.113: I/WindowState(379): WIN DEATH: Window{b23292d0 u0 com.ptuxiaki.stockpredictions/com.ptuxiaki.stockpredictions.MainActivity} 
    01-30 06:34:50.203: D/LightsService(379): Excessive delay setting light: 109ms

和我的代码是什么？当我尝试运行它说，已停止工作......我具有的权限许可权的表现。任何人都可以指出我做错了什么？我想要做的是当应用程序开始检测是否有网络连接，如果它是做我在onCreate做什么，如果它不创建一个警告对话框，以及什么时候用户从它按下OK启动设置wifi的页面能够打开WiFi打开..请帮我...

import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.util.ArrayList; 
import java.util.HashMap; 
import java.util.List; 
import java.util.Map; 

import org.apache.http.HttpResponse; 
import org.apache.http.client.ClientProtocolException; 
import org.apache.http.client.HttpClient; 
import org.apache.http.client.methods.HttpPost; 
import org.apache.http.impl.client.DefaultHttpClient; 
import org.json.JSONArray; 
import org.json.JSONException; 
import org.json.JSONObject; 

import android.net.ConnectivityManager; 
import android.net.NetworkInfo; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.provider.Settings; 
import android.app.Activity; 
import android.app.AlertDialog; 
import android.app.ProgressDialog; 
import android.content.Context; 
import android.content.DialogInterface; 
import android.content.Intent; 
import android.view.Menu; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.ListView; 
import android.widget.SimpleAdapter; 
import android.widget.Toast; 

public class MainActivity extends Activity { 
private String jsonResult; 
private String url = "http://spinner.bl.ee/getstocks.php"; 
private ListView listView; 
ProgressDialog pDialog; 
private Activity context; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    listView = (ListView) findViewById(R.id.listView1); 
    accessWebService(); 
    onDetectConnected(); 
    registerCallClickBack(); 
} 

public void onDetectConnected(){ 
    ConnectivityManager cm = (ConnectivityManager) context 
      .getSystemService(Context.CONNECTIVITY_SERVICE); 
    NetworkInfo activeNetwork = cm.getActiveNetworkInfo(); 
    boolean network_connected = activeNetwork != null 
      && activeNetwork.isAvailable(); 
     if(!network_connected){ 
      onDetectNetworkState().show(); 
     } 
} 

public AlertDialog onDetectNetworkState(){ 
AlertDialog.Builder builder1 = new AlertDialog.Builder(this); 
builder1.setMessage("Εντοπίστηκε πρόβλημμα με τη σύνδεση στο διαδύκτιο. Παρακαλώ συνδεθήτε στο διαδύκτιο.") 
.setTitle("Χωρίς σύνδεση δικτύου") 
.setNegativeButton("Άκυρο",new DialogInterface.OnClickListener() { 

    @Override 
    public void onClick(DialogInterface dialog, int which) { 
     // TODO Auto-generated method stub 
     MainActivity.this.finish(); 
    } 
})  
.setPositiveButton("Οκ",new DialogInterface.OnClickListener() { 

    @Override 
    public void onClick(DialogInterface dialog, int which) { 
     // TODO Auto-generated method stub 
     startActivity(new Intent(Settings.ACTION_WIRELESS_SETTINGS)); 
    } 
}); 
    return builder1.create(); 
} 

@Override 
public void onBackPressed() { 
    // TODO Auto-generated method stub 
    onCreateDialogBack().show(); 
} 
public AlertDialog onCreateDialogBack(){ 
    AlertDialog.Builder builder = new AlertDialog.Builder(this); 
     builder.setTitle(R.string.exit) 
       .setMessage(R.string.exit_message) 
       .setPositiveButton(R.string.yes, new DialogInterface.OnClickListener() { 

        @Override 
        public void onClick(DialogInterface dialog, int which) { 
         // TODO Auto-generated method stub 
         MainActivity.this.finish(); 
        } 
       }) 
       .setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() { 

        @Override 
        public void onClick(DialogInterface dialog, int which) { 
         // TODO Auto-generated method stub 
         dialog.cancel(); 
        } 
       }); 
     return builder.create(); 
} 
private void registerCallClickBack() { 
    // TODO Auto-generated method stub 
    ListView list = (ListView)findViewById(R.id.listView1); 
    list.setOnItemClickListener(new AdapterView.OnItemClickListener() { 

     @Override 
     public void onItemClick(AdapterView<?> parent, View viewClicked, int position, 
       long id) { 
      // TODO Auto-generated method stub 
      String message = "Έχετε επιλέξει την " + id + "η μετοχή"; 
      Toast.makeText(MainActivity.this, message, Toast.LENGTH_SHORT).show(); 
     } 
    }); 
} 

@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; 
} 

// Async Task to access the web 
private class JsonReadTask extends AsyncTask<String, Void, String> { 
    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     pDialog = new ProgressDialog(MainActivity.this); 
     pDialog.setMessage("Γίνεται Λήψη μετοχών..."); 
     pDialog.setCancelable(false); 
     pDialog.show(); 

    } 
    @Override 
    protected String doInBackground(String... params) { 
    HttpClient httpclient = new DefaultHttpClient(); 
    HttpPost httppost = new HttpPost(params[0]); 
    try { 
    HttpResponse response = httpclient.execute(httppost); 
    jsonResult = inputStreamToString(
     response.getEntity().getContent()).toString(); 
    } 

    catch (ClientProtocolException e) { 
    e.printStackTrace(); 
    } catch (IOException e) { 
    e.printStackTrace(); 
    } 
    return null; 
    } 

    private StringBuilder inputStreamToString(InputStream is) { 
    String rLine = ""; 
    StringBuilder answer = new StringBuilder(); 
    BufferedReader rd = new BufferedReader(new InputStreamReader(is)); 

    try { 
    while ((rLine = rd.readLine()) != null) { 
    answer.append(rLine); 
    } 
    } 

    catch (IOException e) { 
    // e.printStackTrace(); 
    Toast.makeText(getApplicationContext(), 
     "Error..." + e.toString(), Toast.LENGTH_LONG).show(); 
    } 
    return answer; 
    } 

    @Override 
    protected void onPostExecute(String result) { 

    ListDrwaer(); 
    pDialog.dismiss(); 
    } 

}// end async task 

public void accessWebService() { 
    JsonReadTask task = new JsonReadTask(); 
    // passes values for the urls string array 
    task.execute(new String[] { url }); 
} 

// build hash set for list view 
public void ListDrwaer() { 
    List<Map<String, String>> stocksList = new ArrayList<Map<String, String>>(); 

    try { 
    JSONObject jsonResponse = new JSONObject(jsonResult); 
    JSONArray jsonMainNode = jsonResponse.optJSONArray("metoxes"); 

    for (int i = 0; i < jsonMainNode.length(); i++) { 
    JSONObject jsonChildNode = jsonMainNode.getJSONObject(i); 
    String name = jsonChildNode.optString("name"); 
    String number = jsonChildNode.optString("price"); 
    String id = jsonChildNode.optString("id"); 
    String outPut =id + ") " + name + " - " + number; 
    stocksList.add(createStockList("metoxes", outPut)); 
    } 

    } catch (JSONException e) { 
    Toast.makeText(getApplicationContext(), "Error" + e.toString(), 
    Toast.LENGTH_SHORT).show(); 
    } 

    SimpleAdapter simpleAdapter = new SimpleAdapter(this, stocksList, 
    android.R.layout.simple_list_item_1, 
    new String[] { "metoxes" }, new int[] { android.R.id.text1 }); 
    listView.setAdapter(simpleAdapter); 
} 

private HashMap<String, String> createStockList(String name, String number) { 
    HashMap<String, String> employeeNameNo = new HashMap<String, String>(); 
    employeeNameNo.put(name, number); 

    return employeeNameNo; 
} 
}

我的清单文件是这样的......

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.ptuxiaki.stockpredictions" 
    android:versionCode="1" 
    android:versionName="1.0" > 

    <uses-sdk 
     android:minSdkVersion="11" 
     android:targetSdkVersion="19" /> 
    <uses-permission android:name="android.permission.INTERNET"/> 
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> 
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/> 
    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/> 
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/> 

    <application 
     android:allowBackup="true" 
     android:icon="@drawable/ic_launcher_stock" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme" > 
     <activity 
      android:name="com.ptuxiaki.stockpredictions.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>

似乎我在这里有问题

01-30 07:10:19.463: E/AndroidRuntime(1720):  at com.ptuxiaki.stockpredictions.MainActivity.onDetectConnected(MainActivity.java:58) 
01-30 07:10:19.463: E/AndroidRuntime(1720):  at com.ptuxiaki.stockpredictions.MainActivity.onCreate(MainActivity.java:53)

线53：

onDetectConnected();

线58：

ConnectivityManager cm = (ConnectivityManager) context 
      .getSystemService(Context.CONNECTIVITY_SERVICE);

来源

2014-01-30 Kostas Drak

+0

是否已添加上网权限??? –

+0

你在MainActivity.java第55行有什么？ –

+0

你在哪一行出错？发布 – Piyush

回答

2

删除

private Activity context;

到处当你使用它，也删除它。例如改变

context.getSystemService(...

只是

getSystemService(...

您的MainActivity已经是一个语境，那就是你所需要的。 您创建了上下文字段，但它是空的，而且无论如何，由于您需要系统创建的上下文，因此无法工作。这就是你的活动。

来源

2014-01-30 12:12:05

+0

现在好了，我删除了它的工作环境，如果我连接...但如果我关闭互联网连接它说强制再次关闭...我显示警报对话框，但它说已停止工作，并立即关闭... –

+0

可能你在registerCallClickBack（）上有一个错误;如果没有连接，则不应执行任何其他代码。请让您的network_connected成为类的一个字段，而不是函数中的变量，并在调用registerCallClickBack（）之前再次检查它。 –

+0

仅当我在列表视图中单击某个项目时才会调用此方法。我不认为那里有问题，因为它适用于WiFi。当我关闭无线或数据，我没有连接它显示对话框，但它也说已停止工作...你能帮我吗？我将粘贴代码的上下文删除，以便您可以检查出来... –

0

添加Internet权限...

<!-- Internet Permissions --> 
    <uses-permission android:name="android.permission.INTERNET" /> 

    <!-- Network State Permissions --> 
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

来源

2014-01-30 12:00:22

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