如何将数据从片段传递到对话框片段 [英] How to pass data from a fragment to a dialogFragment

问题描述

我知道以前有人问过这个问题，但我不太明白如何实现它.我有一个片段myFragment"，我在其中创建了一个myDialogueFragment"的对象.当我从 myFragment 调用它时，我想将一些值传递给 myDialogueFragment.我有一个整数 num，我想将它传递给 myDialogueFragment 并将该数字与来自 myDialogueFragment 的其他一些信息一起存储在本地数据库中.

I know that this was asked before, but I dont quite understand how to implement it. I have a fragment "myFragment" in which I create an object of a "myDialogueFragment". I want to pass some value to the myDialogueFragment when I invoke it from the myFragment. I have an integer num, that I want to pass to the myDialogueFragment and store that number in a local database along with some other info from the myDialogueFragment.

我可能弄错了，但我看到的所有代码都是关于将数据从 myDialogueFragment 发送回 myFragment，这并不是我真正想要的.

I might be mistaken, but all the code I have seen is about sending data from the myDialogueFragment back to the myFragment which is not what I really want.

static MyDialogFragment newInstance(int num) {

MyDialogFragment f = new MyDialogFragment();

// Supply num input as an argument.
Bundle args = new Bundle();
args.putInt("num", num);
f.setArguments(args);

return f;
}  

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mNum = getArguments().getInt("num");
    ...
}

因此，此代码获取 myFragment onCreate() 方法中的参数.我想在 myFragment() 中发送参数并在 myDialogueFragment 中接收它们.

So, this code gets the arguments within the myFragment onCreate() method. I want to sent the arguments within the myFragment() and receive them in the myDialogueFragment.

我怎样才能做到这一点?

How can I achieve that?

推荐答案

你需要在片段上设置参数如下:

What you need is to setArguments on the fragment as follows:

Bundle args = new Bundle();
args.putString("key", "value");
DialogFragment newFragment = new YourDialogFragment();  
newFragment.setArguments(args);
newFragment.show(getSupportFragmentManager(), "TAG");

您现在要做的就是在片段中捕获这些参数并使用它们...

All you have to do now, is catch those arguments in your fragment and use them...

在对话片段中，您会这样读...

AND IN THE DIALOG FRAGMENT YOU READ IT LIKE THIS...

Bundle mArgs = getArguments();
String myValue = mArgs.getString("keyUsed to send it...");

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