1、insert

public void insertEmergency(String name, String number, String msg, String account) {
        ContentResolver resolver = mContext.getContentResolver();
        ContentValues initialValues = new ContentValues();
        initialValues.put(EmergencyContactTable.EMERG_NAME, name);
        initialValues.put(EmergencyContactTable.EMERG_NUMBER, number);
        initialValues.put(EmergencyContactTable.EMERG_MSG, msg);
        initialValues.put(EmergencyContactTable.EMERG_ACCOUNT, account);
        resolver.insert(EmergencyContactTable.CONTENT_URI, initialValues);
    }

2、delete

public void deleteEmergency(long rowId) {
        ContentResolver resolver = mContext.getContentResolver();
        resolver.delete(EmergencyContactTable.CONTENT_URI, _ID + "=?", new String[]{ String.valueOf(rowId) }) ;
    }

3、update

public void updateEmergency(long rowId, String name, String number, String msg, String account) {
        ContentResolver resolver = mContext.getContentResolver();
        ContentValues initialValues = new ContentValues();
        initialValues.put(EmergencyContactTable.EMERG_NAME, name);
        initialValues.put(EmergencyContactTable.EMERG_NUMBER, number);
        initialValues.put(EmergencyContactTable.EMERG_MSG, msg);
        initialValues.put(EmergencyContactTable.EMERG_ACCOUNT, account);
        resolver.update(EmergencyContactTable.CONTENT_URI, initialValues, _ID + "=?",new String[]{String.valueOf(rowId)}) ;
    }

4、query

public Cursor getEmergency(long rowId) throws SQLException {
        ContentResolver resolver = mContext.getContentResolver();
        Cursor cursor = resolver.query(EmergencyContactTable.CONTENT_URI, null, _ID + "=?", new String[]{String.valueOf(rowId)}, null);
        if (cursor != null) {
            cursor.moveToFirst();
        }
        return cursor;
    }