如何在電話簿中偵聽聯繫人更改，如添加新聯繫人，更新，刪除

Question

public class MainActivity extends AppCompatActivity { 
    ArrayList<SelectUser> selectUsers; 
    List<SelectUser> temp; 
    ListView listView; 
    Cursor phones, email; 
    public static final String INTENT_KEY_FINISH_ACTIVITY_ON_SAVE_COMPLETED = "finishActivityOnSaveCompleted"; 
    ContentResolver resolver; 
    int INSERT_CONTACT_REQUEST = 2; 
    SelectUserAdapter adapter; 

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

     selectUsers = new ArrayList<SelectUser>(); 
     resolver = this.getContentResolver(); 
     listView = (ListView) findViewById(R.id.contacts_list); 

     phones = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " ASC"); 
     LoadContact loadContact = new LoadContact(); 
     loadContact.execute(); 
     TextView textView =(TextView)findViewById(R.id.AddHint); 
     textView.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 

       Intent i = new Intent(Intent.ACTION_INSERT, ContactsContract.Contacts.CONTENT_URI); 

       i.putExtra(INTENT_KEY_FINISH_ACTIVITY_ON_SAVE_COMPLETED, true); 
       startActivityForResult(i, INSERT_CONTACT_REQUEST); 
      } 
     }); 
    } 

    // Load data on background 
    class LoadContact extends AsyncTask<Void, Void, Void> { 
     @Override 
     protected void onPreExecute() { 
      super.onPreExecute(); 

     } 

     @Override 
     protected Void doInBackground(Void... voids) { 
      // Get Contact list from Phone 

      if (phones != null) { 
       Log.e("count", "" + phones.getCount()); 
       if (phones.getCount() == 0) { 
        Toast.makeText(MainActivity.this, "No contacts in your contact list.", Toast.LENGTH_LONG).show(); 
       } 

       while (phones.moveToNext()) { 
        String id = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.CONTACT_ID)); 
        String name = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME)); 
        String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)); 
        String EmailAddr = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA2)); 

        SelectUser selectUser = new SelectUser(); 
        selectUser.setName(name); 
        selectUser.setPhone(phoneNumber); 
        selectUser.setEmail(id); 
        selectUsers.add(selectUser); 
       } 
      } else { 
       Log.e("Cursor close 1", "----------------"); 
      } 
      //phones.close(); 
      return null; 
     } 

     @Override 
     protected void onPostExecute(Void aVoid) { 
      super.onPostExecute(aVoid); 
      adapter = new SelectUserAdapter(selectUsers, MainActivity.this); 
      listView.setAdapter(adapter); 

      // Select item on listclick 
      listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
       @Override 
       public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { 

        Log.e("search", "here---------------- listener"); 

        SelectUser data = selectUsers.get(i); 
       } 
      }); 

      listView.setFastScrollEnabled(true); 
     } 
    } 

    @Override 
    protected void onStop() { 
     super.onStop(); 
     phones.close(); 
    } 
} 

如何在電話簿中偵聽聯繫人更改，如添加新聯繫人，更新，刪除。如何使我的Android ContentObserver爲ContactsContract檢測添加，更新或刪除的聯繫人？

Answer 1

使用ContentResolver

class MyObserver extends ContentObserver { 
// left blank below constructor for this Contact observer example to work 
// or if you want to make this work using Handler then change below registering //line  
public MyObserver(Handler handler) { 
    super(handler);   
} 

@Override 
public void onChange(boolean selfChange) { 
    this.onChange(selfChange, null); 
    Log.e("", "~~~~~~" + selfChange); 
    // Override this method to listen to any changes 
}   

@Override 
public void onChange(boolean selfChange, Uri uri) { 
    //On Contact add/delete this method is fired 
}   
} 

註冊觀察家這樣可here