May this help you:
Add this permission in your AndroidManifest.xml:
<uses-permission
android:name="android.permission.READ_CALL_LOG"/>
<uses-permission
android:name="android.permission.WRITE_CALL_LOG"/>
Code:
ContentValues values = new ContentValues();
values.put(CallLog.Calls.NUMBER, number);
values.put(CallLog.Calls.DATE, System.currentTimeMillis());
values.put(CallLog.Calls.DURATION, 0);
values.put(CallLog.Calls.TYPE, CallLog.Calls.OUTGOING_TYPE);
values.put(CallLog.Calls.NEW, 1);
values.put(CallLog.Calls.CACHED_NAME, "");
values.put(CallLog.Calls.CACHED_NUMBER_TYPE, 0);
values.put(CallLog.Calls.CACHED_NUMBER_LABEL, "");
context.getContentResolver().insert(CallLog.Calls.CONTENT_URI, values);