更新查询的返回值是0 [英] The return value of update query is 0

问题描述

我想马克为已读短信。我有短信ID。我曾尝试以下code为已读标记此短信。

I want to marks a sms as read . I have id of that sms . I have tried the following code to mark this sms as read .

public void setRead(int position, String smsMessageId) {

        ContentValues values = new ContentValues();
        values.put("read",true);
        int flag = context.getContentResolver().update(Uri.parse("content://sms/inbox"),
                values, "_id=" + smsMessageId, null);
        Toast.makeText(context, "The result is "+flag, Toast.LENGTH_LONG).show();  
}

但是返回的结果是0。为什么返回结果0？

But the return result is 0 . Why is the return result 0 ?

推荐答案

我的应用程序没有被设置为默认值。这就是为什么，在返回的结果是0。如果该应用被设为默认值，则返回结果为1。

My app is not set as default . That is why , the return result is 0 .If the app is set as default , then the return result is 1 .

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