Android ContentObserver onChange（）のみがfalseを返します

Question

私はCallLog.CallsコンテンツプロバイダのContentObserverを実装しようとしています。つまり、電話をかけたり、電話を受けるなどの場合、オブザーバーはCallLog.Callsのコンテンツプロバイダが変更されたことを通知する必要があります。しかし、onchangeメソッドは、オブザーバーが登録されていてもfalseを返すだけです。たぶん私は間違ったことをしているのかもしれない

これは私のコードです。それは活動です。

package com.psyhclo; 


public class RatedCalls extends ListActivity { 

private static final String LOG_TAG = "RatedCallsObserver"; 
private Handler handler = new Handler(); 
private RatedCallsContentObserver callsObserver = null; 
private SQLiteDatabase db; 
private CallDataHelper dh = null; 
StringBuilder sb = new StringBuilder(); 
OpenHelper openHelper = new OpenHelper(RatedCalls.this); 

class RatedCallsContentObserver extends ContentObserver { 
    public RatedCallsContentObserver(Handler h) { 
     super(h); 
    } 

    public void onChange(boolean selfChange) { 
     Log.d(LOG_TAG, "RatedCallsContentObserver.onChange(" + selfChange 
       + ")"); 
    } 
} 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    registerContentObservers(); 
    fillList(); 
} 

@Override 
public void onStart() { 

    super.onStart(); 
    registerContentObservers(); 

} 

@Override 
public void onStop() { 

    super.onStop(); 
    unregisterContentObservers(); 

} 

private void fillList() { 

    Cursor cursor = getContentResolver().query(
      android.provider.CallLog.Calls.CONTENT_URI, null, null, null, 
      android.provider.CallLog.Calls.DATE + " DESC "); 

    cursor.setNotificationUri(getBaseContext().getContentResolver(), 
      android.provider.CallLog.Calls.CONTENT_URI); 

    dh = new CallDataHelper(this); 
    db = openHelper.getWritableDatabase(); 

    startManagingCursor(cursor); 
    int numberColumnId = cursor 
      .getColumnIndex(android.provider.CallLog.Calls.NUMBER); 
    int durationId = cursor 
      .getColumnIndex(android.provider.CallLog.Calls.DURATION); 
    int contactNameId = cursor 
      .getColumnIndex(android.provider.CallLog.Calls.CACHED_NAME); 
    int dateId = cursor.getColumnIndex(android.provider.CallLog.Calls.DATE); 
    int numTypeId = cursor 
      .getColumnIndex(android.provider.CallLog.Calls.CACHED_NUMBER_TYPE); 
    // int contactIdColumnId = 
    // cursor.getColumnIndex(android.provider.ContactsContract.RawContacts.CONTACT_ID); 

    Date dt = new Date(); 
    int hours = dt.getHours(); 
    int minutes = dt.getMinutes(); 
    int seconds = dt.getSeconds(); 
    String currTime = hours + ":" + minutes + ":" + seconds; 

    ArrayList<String> callList = new ArrayList<String>(); 
    if (cursor.moveToFirst()) { 

     do { 

      String contactNumber = cursor.getString(numberColumnId); 
      String contactName = cursor.getString(contactNameId); 
      String duration = cursor.getString(durationId); 
      String callDate = DateFormat.getDateInstance().format(dateId); 
      String numType = cursor.getString(numTypeId); 

      ContentValues values = new ContentValues(); 

      values.put("contact_id", 1); 
      values.put("contact_name", contactName); 
      values.put("number_type", numType); 
      values.put("contact_number", contactNumber); 
      values.put("duration", duration); 
      values.put("date", callDate); 
      values.put("current_time", currTime); 
      values.put("cont", 1); 

      getBaseContext().getContentResolver().notifyChange(
        android.provider.CallLog.Calls.CONTENT_URI, null); 
      this.db.insert(CallDataHelper.TABLE_NAME, null, values); 

      Toast.makeText(getBaseContext(), "Inserted!", Toast.LENGTH_LONG); 
      callList.add("Contact Number: " + contactNumber 
        + "\nContact Name: " + contactName + "\nDuration: " 
        + duration + "\nDate: " + callDate); 

     } while (cursor.moveToNext()); 
    } 
    setListAdapter(new ArrayAdapter<String>(this, R.layout.listitem, 
      callList)); 
    ListView lv = getListView(); 
    lv.setTextFilterEnabled(true); 

    lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() { 

     @Override 
     public void onItemClick(AdapterView<?> parent, View view, 
       int position, long id) { 

      Toast.makeText(getApplicationContext(), 
        ((TextView) view).getText(), Toast.LENGTH_SHORT).show(); 

     } 
    }); 

} 

private void registerContentObservers() { 
    ContentResolver cr = getContentResolver(); 
    callsObserver = new RatedCallsContentObserver(handler); 
    cr.registerContentObserver(android.provider.CallLog.Calls.CONTENT_URI, 
      true, callsObserver); 
} 

private void unregisterContentObservers() { 

    ContentResolver cr = getContentResolver(); 
    if (callsObserver != null) { // just paranoia 
     cr.unregisterContentObserver(callsObserver); 
     callsObserver = null; 
    } 

} 
} 

Answer 1

これはこの質問に対する回答です。

Android onChange() method only returns false