Die Verwendung von 'this' in getSupportLoaderManager() gibt mir eine Fehlermeldung

Question

Ich bin lose folgen einem Leitfaden, aber ich verwende einen onClickListener, um den Suchvorgang zu starten. Ich bin dabei, einen Loader zu implementieren:

getSupportLoaderManager(). RestartLoader (0, queryBundle, this);

aber wenn ich setzen in ‚this‘ es bringt die folgende Meldung:

Wrong 3. Argument Typ. Gefunden: 'android.view.View.OnClickListener', erforderlich: 'android.support.v4.app.LoaderManager. LoaderCallbacks '

Ich habe es verabscheut, von einem onClickListener zu einer onClick-Methode zu wechseln, wie im Leitfaden vorgeschlagen, gibt es eine Möglichkeit, den Loader im onClickListener zu implementieren?

Der Code ist unten:

import android.content.Context; 
import android.net.ConnectivityManager; 
import android.net.NetworkInfo; 
import android.app.LoaderManager; 
import android.app.LoaderManager.LoaderCallbacks; 
import android.content.Loader; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.view.inputmethod.InputMethodManager; 
import android.widget.AdapterView; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.ListView; 
import android.widget.TextView; 
import android.widget.Toast; 

import java.io.IOException; 
import java.util.ArrayList; 
import java.util.List; 

public class GoogleBookActivity extends AppCompatActivity implements 
LoaderManager.LoaderCallbacks<String>{ 

private static final String TAG = GoogleBookActivity.class.getSimpleName(); 
private EditText mEditText; 
private BookAdapter mAdapter; 
private Button bookSearch; 
private TextView mTitle, mAuthor; 

//URL link to the API 
private static final String GOOGLE_BOOKS_REQUEST_URL = "https://www.googleapis.com/books/v1/volumes?q="; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_google_book); 

    mTitle = (TextView) findViewById(R.id.book_title); 
    mAuthor = (TextView) findViewById(R.id.book_author); 
    bookSearch = (Button) findViewById(R.id.searchbutton); 
    mEditText = (EditText) findViewById(R.id.search_text); 




    bookSearch.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 

      //Initialise String queryText 
      String queryText = mEditText.getText().toString(); 

      //For Hiding the keyboard when the search button is clicked 
      InputMethodManager inputManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); 
      inputManager.hideSoftInputFromInputMethod(getCurrentFocus().getWindowToken(),InputMethodManager.HIDE_NOT_ALWAYS); 

      //For Checking the network status and empty search field case 
      ConnectivityManager connMgr = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE); 
      NetworkInfo networkInfo = connMgr.getActiveNetworkInfo(); 

      if(networkInfo !=null && networkInfo.isConnected() && queryText.length()!=0){ 
       //new FetchBook(mTitle, mAuthor).execute(queryText); 
      } 

      Log.i(TAG, "Searched " + queryText); 
      if(queryText.length() != 0){ 
       new FetchBook(mTitle, mAuthor).execute(queryText); 
       mAuthor.setText(""); 
       mTitle.setText(R.string.loading); 
       //We replace the call to execute the fetchbook task with a call to restartLoader(), passing in 
       // the querystring you get from the EditText in the Bundle. 
       Bundle queryBundle = new Bundle(); 
       queryBundle.putString("queryText", queryText); 
       getSupportLoaderManager().restartLoader(0,queryBundle,this); 

      }else { 
       if(queryText.length() == 0){ 
        mAuthor.setText(""); 
        mTitle.setText("Please enter a search term."); 
       }else{ 
        mAuthor.setText(""); 
        mTitle.setText("Please check your network connection and try again."); 
       } 
      } 
     } 
    }); 


} 


@Override 
public Loader<String> onCreateLoader(int i, Bundle bundle) { 
    return null; 
} 

@Override 
public void onLoadFinished(Loader<String> loader, String s) { 

} 

@Override 
public void onLoaderReset(Loader<String> loader) { 

    } 
} 

Answer 1

this auf das bezieht sich Einkapseln OnClickListener:

bookSearch.setOnClickListener(new View.OnClickListener() { 

    @Override 
    public void onClick(View view) { 
     // You are now inside an anonymous class extending from 
     // OnClickListener. 'this' now refers to this very instance 
     // of the OnClickListener 
    } 
}); 

Um zum Einkapseln GoogleBookActivity zu beziehen, geben genau das Klassennamen vor:

getSupportLoaderManager().restartLoader(0, queryBundle, GoogleBookActivity.this);