为什么内容uri在这种情况下不起作用

Question

Uri sare_sms = Uri.parse("content://contacts/");    
Cursor c = getContentResolver().query(sare_sms, null, null, null, null);

TextView txt = ( TextView ) findViewById (R.id.txt);
txt.setText( new Integer(c.getColumnCount()).toString());

此代码无效

但是

Uri sare_sms = Uri.parse("content://sms/inbox/");
Cursor c = getContentResolver().query(sare_sms, null, null, null, null);

TextView txt = ( TextView ) findViewById (R.id.txt);
txt.setText( new Integer(c.getColumnCount()).toString());

这正是为什么工作正常？

＆安培;我已经包括

uses-permission android:name="android.permission.READ_SMS" 
uses-permission android:name="android.permission.READ_CONTACTS"

Answer 1

您应该使用content://contacts/people获取联系信息