Question

nullim使用Cursor cursor = getContentResolver（） .query（contactUri，projection，null，null，null）;获取点击的联系人数量。是否可以使用此查询获取电子邮件，号码和名称。同时？我们可以这样做吗？如下图所示？

                 String[] projection = {Phone.NUMBER};
             String[] projection1 = {Email.DATA};
             String[] projection2 = {Contacts.DISPLAY_NAME};
                 Cursor cursor = getContentResolver().
                 query(contactUri, projection, null,projection1,projection2);
             cursor.moveToFirst();
                 int column = cursor.getColumnIndex(Phone.NUMBER);
             int column1 = cursor.getColumnIndex(Email.DATA);
             int column2= cursor.getColumnIndex(Contacts.DISPLAY_NAME);
             String number = cursor.getString(column);
             String email1 = cursor.getString(column1);
             String name1 = cursor.getString(column2)

这可能吗？

现在这是正确的吗？

   String[] projection = {Phone.NUMBER, Email.ADDRESS, Contacts.DISPLAY_NAME};
   Cursor cursor = getContentResolver().
             query(contactUri, projection, null,null,null);
         cursor.moveToFirst();
             int column = cursor.getColumnIndex(Phone.NUMBER);
         int column1 = cursor.getColumnIndex(Email.ADDRESS);
         int column2= cursor.getColumnIndex(Contacts.DISPLAY_NAME);
         String number = cursor.getString(column);
         String email1 = cursor.getString(column1);
         String name1 = cursor.getString(column2)


             editText3 = (EditText) findViewById(R.id.editText3);
             editText17 = (EditText) findViewById(R.id.editText17);
             editText3.setText(number); 
             editText17.setText(email1);

仅在文本框中设置了电话号码 edittext3和edittext17都有手机号码？我做错了什么？谢谢

Answer 1

您可以在数组中放置多个值：

String[] projection = {Phone.NUMBER, Email.DATA, Contacts.DISPLAY_NAME};

所有在一起：

String[] projection = {Phone.NUMBER, Email.DATA, Contacts.DISPLAY_NAME};
Cursor cursor = getContentResolver().query(contactUri, projection, null, null, null);

int column = cursor.getColumnIndex(Phone.NUMBER);
int column1 = cursor.getColumnIndex(Email.DATA);
int column2= cursor.getColumnIndex(Contacts.DISPLAY_NAME);
if(cursor.moveToFirst()) { // Check if data exists
     String number = cursor.getString(column);
     String email1 = cursor.getString(column1);
     String name1 = cursor.getString(column2)
}

查询以获得一行代码中的电子邮件，联系人姓名和号码

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