如何獲取Android設備的主要電子郵件地址

Question

如何獲取Android的主要電子郵件地址（或電子郵件地址列表）？

我的理解是，在OS 2.0+中支持多個電子郵件地址，但在2.0以下，每個設備只能有一個電子郵件地址。

Answer 1

有幾種方法可以做到這一點，如下圖所示。

作爲一種友好的警告，在處理帳戶，配置文件和聯繫人數據時，請小心並且事先向用戶提供。如果您濫用用戶的電子郵件地址或其他個人信息，可能會發生不好的事情。

方法A：使用AccountManager（API級別5+）

您可以使用AccountManager.getAccounts或AccountManager.getAccountsByType來獲得設備上的所有帳戶名稱的列表。幸運的是，對於某些帳戶類型（包括com.google），帳戶名稱是電子郵件地址。下面的示例代碼片段。

Pattern emailPattern = Patterns.EMAIL_ADDRESS; // API level 8+ 
Account[] accounts = AccountManager.get(context).getAccounts(); 
for (Account account : accounts) { 
    if (emailPattern.matcher(account.name).matches()) { 
     String possibleEmail = account.name; 
     ... 
    } 
} 

請注意，這需要GET_ACCOUNTS權限：

<uses-permission android:name="android.permission.GET_ACCOUNTS" /> 

更多關於使用AccountManager可在SDK中Contact Manager示例代碼中找到。

方法B：使用ContactsContract.Profile（API等級14+）

就Android 4.0（冰淇淋三明治），你可以通過訪問他們的個人資料得到了用戶的電子郵件地址。訪問用戶配置文件有點重量級，因爲它需要兩個權限（下面會詳細介紹），但電子郵件地址是相當敏感的數據，因此這是入場費。

下面是一個完整的示例，它使用CursorLoader來檢索包含電子郵件地址的配置文件數據行。

public class ExampleActivity extends Activity implements LoaderManager.LoaderCallbacks<Cursor> { 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     getLoaderManager().initLoader(0, null, this); 
    } 

    @Override 
    public Loader<Cursor> onCreateLoader(int id, Bundle arguments) { 
     return new CursorLoader(this, 
       // Retrieve data rows for the device user's 'profile' contact. 
       Uri.withAppendedPath(
         ContactsContract.Profile.CONTENT_URI, 
         ContactsContract.Contacts.Data.CONTENT_DIRECTORY), 
       ProfileQuery.PROJECTION, 

       // Select only email addresses. 
       ContactsContract.Contacts.Data.MIMETYPE + " = ?", 
       new String[]{ContactsContract.CommonDataKinds.Email.CONTENT_ITEM_TYPE}, 

       // Show primary email addresses first. Note that there won't be 
       // a primary email address if the user hasn't specified one. 
       ContactsContract.Contacts.Data.IS_PRIMARY + " DESC"); 
    } 

    @Override 
    public void onLoadFinished(Loader<Cursor> cursorLoader, Cursor cursor) { 
     List<String> emails = new ArrayList<String>(); 
     cursor.moveToFirst(); 
     while (!cursor.isAfterLast()) { 
      emails.add(cursor.getString(ProfileQuery.ADDRESS)); 
      // Potentially filter on ProfileQuery.IS_PRIMARY 
      cursor.moveToNext(); 
     } 

     ... 
    } 

    @Override 
    public void onLoaderReset(Loader<Cursor> cursorLoader) { 
    } 

    private interface ProfileQuery { 
     String[] PROJECTION = { 
       ContactsContract.CommonDataKinds.Email.ADDRESS, 
       ContactsContract.CommonDataKinds.Email.IS_PRIMARY, 
     }; 

     int ADDRESS = 0; 
     int IS_PRIMARY = 1; 
    } 
} 

這同時需要READ_PROFILE和READ_CONTACTS權限：

<uses-permission android:name="android.permission.READ_PROFILE" /> 
<uses-permission android:name="android.permission.READ_CONTACTS" /> 

Answer 2

這在Android中是非常棘手的事情，我還沒有完成。但也許這些鏈接可以幫助你：

• Android Issue 1073:Google Auth Tokens should be accessible to 3rd party applications through an API
• SDK API AccountManager in Andriod 2.x+

Answer 3

這可能是對他人有用：

Using AccountPicker to get user's email address沒有任何全局權限，並允許用戶知道並授權或取消該過程。

Answer 4

我會使用Android的AccountPicker，在ICS中引入。

Intent googlePicker = AccountPicker.newChooseAccountIntent(null, null, new String[]{GoogleAuthUtil.GOOGLE_ACCOUNT_TYPE}, true, null, null, null, null); 
startActivityForResult(googlePicker, REQUEST_CODE); 

然後等待結果：

protected void onActivityResult(final int requestCode, final int resultCode, 
           final Intent data) { 
    if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) { 
     String accountName = data.getStringExtra(AccountManager.KEY_ACCOUNT_NAME); 
    } 
} 

Answer 5

public String getUsername() { 
    AccountManager manager = AccountManager.get(this); 
    Account[] accounts = manager.getAccountsByType("com.google"); 
    List<String> possibleEmails = new LinkedList<String>(); 

    for (Account account : accounts) { 
     // TODO: Check possibleEmail against an email regex or treat 
     // account.name as an email address only for certain account.type values. 
     possibleEmails.add(account.name); 
    } 

    if (!possibleEmails.isEmpty() && possibleEmails.get(0) != null) { 
     String email = possibleEmails.get(0); 
     String[] parts = email.split("@"); 

     if (parts.length > 1) 
      return parts[0]; 
    } 
    return null; 
} 

Answer 6

可悲的是接受的答案是行不通的。

我來晚了，但除非內容URI由供應商改變了這裏的內部的Android的電子郵件應用程序的解決方案：

Uri EMAIL_ACCOUNTS_DATABASE_CONTENT_URI = 
       Uri.parse("content://com.android.email.provider/account"); 

public ArrayList<String> GET_EMAIL_ADDRESSES() 
{ 
    ArrayList<String> names = new ArrayList<String>(); 
    ContentResolver cr  = m_context.getContentResolver(); 
    Cursor cursor   = cr.query(EMAIL_ACCOUNTS_DATABASE_CONTENT_URI ,null, 
          null, null, null); 

    if (cursor == null) { 
     Log.e("TEST", "Cannot access email accounts database"); 
     return null; 
    } 

    if (cursor.getCount() <= 0) { 
     Log.e("TEST", "No accounts"); 
     return null; 
    } 

    while (cursor.moveToNext()) { 
     names.add(cursor.getString(cursor.getColumnIndex("emailAddress"))); 
     Log.i("TEST", cursor.getString(cursor.getColumnIndex("emailAddress"))); 
    } 
    return names; 
} 

Answer 7

工作在棉花糖操作系統

btn_click=(Button) findViewById(R.id.btn_click); 

    btn_click.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View arg0) 
     { 
      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) 
      { 
       int permissionCheck = ContextCompat.checkSelfPermission(PermissionActivity.this, 
         android.Manifest.permission.CAMERA); 
       if (permissionCheck == PackageManager.PERMISSION_GRANTED) 
       { 
        //showing dialog to select image 
        String possibleEmail=null; 

        Pattern emailPattern = Patterns.EMAIL_ADDRESS; // API level 8+ 
        Account[] accounts = AccountManager.get(PermissionActivity.this).getAccounts(); 
        for (Account account : accounts) { 
         if (emailPattern.matcher(account.name).matches()) { 
          possibleEmail = account.name; 
          Log.e("keshav","possibleEmail"+possibleEmail); 
         } 
        } 

        Log.e("keshav","possibleEmail gjhh->"+possibleEmail); 
        Log.e("permission", "granted Marshmallow O/S"); 

       } else {      ActivityCompat.requestPermissions(PermissionActivity.this, 
          new String[]{android.Manifest.permission.READ_EXTERNAL_STORAGE, 
            android.Manifest.permission.READ_PHONE_STATE, 
            Manifest.permission.GET_ACCOUNTS, 
            android.Manifest.permission.CAMERA}, 1); 
       } 
      } else { 

//低於棉花糖

    String possibleEmail=null; 

        Pattern emailPattern = Patterns.EMAIL_ADDRESS; // API level 8+ 
        Account[] accounts = AccountManager.get(PermissionActivity.this).getAccounts(); 
        for (Account account : accounts) { 
         if (emailPattern.matcher(account.name).matches()) { 
          possibleEmail = account.name; 
          Log.e("keshav","possibleEmail"+possibleEmail); 
        } 

        Log.e("keshav","possibleEmail gjhh->"+possibleEmail); 


      } 
     } 
    });