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在添加此代码之前，我的应用程序运行良好，我使用此代码尝试了一个单独的 android 项目，它运行良好......

HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost("http://10.0.2.2/jan/android/fave.php");
        try {

            HttpResponse response = httpclient.execute(httppost);
            String jsonResult = inputStreamToString(response.getEntity().getContent()).toString();
            JSONObject object = new JSONObject(jsonResult);
            JSONArray the_json_array = object.getJSONArray("products");

            int length = the_json_array.length();
            for (int i = 0; i < length; i++)
              {
                JSONObject another_json_object = the_json_array.getJSONObject(i);
            String verion = another_json_object.optString("title");
              }
        } 
        catch (JSONException e) {
            e.printStackTrace();
        } 
        catch (ClientProtocolException e) {
            e.printStackTrace();
        } 
        catch (IOException e) {
            e.printStackTrace();
        }

这是一个用于输入流

  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();
     }
    return answer;
   }

但是当我将它添加到这段代码中时，应用程序崩溃了，我已经调试了超过 12 个小时，但我离修复它还差得很远。

 public class MainActivity extends Activity {

private DrawerLayout drawerLayout;
private ActionBarDrawerToggle actionBarDrawerToggle;



@Override
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
        setProgressBarIndeterminateVisibility(true); 
        setContentView(R.layout.activity_main);


        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost("http://10.0.2.2/jan/android/fave.php");
        try {

            HttpResponse response = httpclient.execute(httppost);
            String jsonResult =    inputStreamToString(response.getEntity().getContent()).toString();
            JSONObject object = new JSONObject(jsonResult);
            JSONArray the_json_array = object.getJSONArray("products");

            int length = the_json_array.length();
            for (int i = 0; i < length; i++)
              {
                JSONObject another_json_object = the_json_array.getJSONObject(i);
            String verion = another_json_object.optString("title");
              }
        } 
        catch (JSONException e) {
            e.printStackTrace();
        } 
        catch (ClientProtocolException e) {
            e.printStackTrace();
        } 
        catch (IOException e) {
            e.printStackTrace();
        }



     // Create an instance of editorFrag
        mainFragment firstFrag = new mainFragment();

        // add fragment to the fragment container layout
        android.app.FragmentTransaction ft = getFragmentManager().beginTransaction().add(R.id.content_frame, firstFrag);
        ft.commit(); 

    // 1. pass context and data to the custom adapter
    MyAdapter adapter = new MyAdapter(this, generateData());

    // if extending Activity 2. Get ListView from activity_main.xml
    ListView listView = (ListView) findViewById(R.id.listview);

    // 3. setListAdapter
    //listView.setAdapter(adapter); if extending Activity
    listView.setAdapter(adapter);

 // App Icon 
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);

actionBarDrawerToggle = new ActionBarDrawerToggle(
        this,                  /* host Activity */
        drawerLayout,         /* DrawerLayout object */
        R.drawable.ic_drawer,  /* nav drawer icon to replace 'Up' caret */
        R.string.drawer_open,  /* "open drawer" description */
        R.string.drawer_close  /* "close drawer" description */
        );

// Set actionBarDrawerToggle as the DrawerListener
drawerLayout.setDrawerListener(actionBarDrawerToggle);

getActionBar().setDisplayHomeAsUpEnabled(true); 

// just styling option add shadow the right edge of the drawer
drawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);

listView.setOnItemClickListener(new DrawerItemClickListener());

}

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        // Sync the toggle state after onRestoreInstanceState has occurred.
         actionBarDrawerToggle.syncState();
    }

@Override
public boolean onOptionsItemSelected(MenuItem item) {

 // call ActionBarDrawerToggle.onOptionsItemSelected(), if it returns true
// then it has handled the app icon touch event
if (actionBarDrawerToggle.onOptionsItemSelected(item)) {
    return true;
}
return super.onOptionsItemSelected(item);
}@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
actionBarDrawerToggle.onConfigurationChanged(newConfig);
}

private ArrayList<Model> generateData(){
    HttpClient httpclient = new DefaultHttpClient();
    HttpPost httppost = new HttpPost("http://10.0.2.2/janime/android/fave.php");
    ArrayList<Model> models = new ArrayList<Model>();
    models.add(new Model("SmileyChix", "http://fc05.deviantart.net/fs71/i/2013/001/3/8/ouma_shu___guilty_crown_wallpaper_lost_christmas_by_akije_hirodi-d5q45lh.jpg"));
    models.add(new Model(R.drawable.ic_action_dock,"Latest",null));
    models.add(new Model(R.drawable.ic_action_storage,"Watchlist","12"));
    models.add(new Model(R.drawable.ic_action_settings,"Settings",null));


    try
    {



        String the_json = "{'products':[{'title':'test'},{'title':'test'}],'success':1}";
        JSONObject myjson = new JSONObject(the_json);
        JSONArray the_json_array = myjson.getJSONArray("products");
        int length = the_json_array.length();
    for (int i = 0; i < length; i++)
      {
        JSONObject another_json_object = the_json_array.getJSONObject(i);
        String artist_name = another_json_object.optString("title").toString();
        models.add(new Model(R.drawable.ic_drawer, artist_name,"12"));
      }

    }
    catch (JSONException e) {
        e.printStackTrace();
    }
    return models;
}

private class DrawerItemClickListener implements ListView.OnItemClickListener {
    @Override
    public void onItemClick(AdapterView parent, View view, int position, long id) {
        TextView text = (TextView) view.findViewById(R.id.passId);
        String tEXT = text.getText().toString();
        Toast.makeText(MainActivity.this, tEXT, Toast.LENGTH_LONG).show();
     // Create an instance of editorFrag
        videoList firstFrag = new videoList();
        Bundle bundle = new Bundle();
        bundle.putString("key", tEXT);
        firstFrag.setArguments(bundle);
        // add fragment to the fragment container layout
        android.app.FragmentTransaction ft = getFragmentManager().beginTransaction().add(R.id.content_frame, firstFrag);

        ft.addToBackStack(null);
        ft.commit(); 
        drawerLayout.closeDrawers();

        }



}       

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();
     }
    return answer;
   }

}

日志猫

    11-07 21:50:49.987: E/AndroidRuntime(30662): FATAL EXCEPTION: main
    11-07 21:50:49.987: E/AndroidRuntime(30662): java.lang.RuntimeException: Unable to start activity ComponentInfo{android.janime/android.janime.MainActivity}: android.os.NetworkOnMainThreadException
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2295)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2349)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at android.app.ActivityThread.access$700(ActivityThread.java:159)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at android.os.Handler.dispatchMessage(Handler.java:99)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at android.os.Looper.loop(Looper.java:137)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at android.app.ActivityThread.main(ActivityThread.java:5419)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at java.lang.reflect.Method.invokeNative(Native Method)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at java.lang.reflect.Method.invoke(Method.java:525)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1187)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at dalvik.system.NativeStart.main(Native Method)
    11-07 21:50:49.987: E/AndroidRuntime(30662): Caused by: android.os.NetworkOnMainThreadException
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1144)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at libcore.io.IoBridge.connect(IoBridge.java:112)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at java.net.Socket.connect(Socket.java:842)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:670)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:509)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at android.janime.MainActivity.onCreate(MainActivity.java:91)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at android.app.Activity.performCreate(Activity.java:5372)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1104)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2257)
    11-07 21:50:49.987: E/AndroidRuntime(30662):    ... 11 more
4

1 回答 1

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首先，您不应该在onCreate方法中启动 HttpRequest，但最重要的是您应该在其他线程中启动它。

根据 Android 的版本，主线程中的目标 http 请求是不允许的。

请发布堆栈跟踪

于 2013-11-07T14:00:32.327 回答