我们可以从适配器调用startActivityForResult吗?如何获得响应? [英] can we call startActivityForResult from adapter?How to get the response?

问题描述

是否可能在适配器中包含方法startActivtyForResult?然后如何获取响应?在哪里执行回叫功能?

is it possible to have method startActivtyForResult within an adapter?Then how to get the response? Where to execute the call back function?

推荐答案

是的，有可能.您需要适配器中Context的引用并调用该活动:

Yes, it's possible. You need a reference for the Context in the adapter and call the activity:

Intent intent = new Intent(context, TargetActivity.class);
((Activity) context).startActivityForResult(intent, REQUEST_FOR_ACTIVITY_CODE);

请注意上下文必须是活动上下文，否则此代码将失败.

Beware that context must be an activity context or this code will fail.

您可以像往常一样使用onActivityResult在封闭活动中获得结果.

You get the result in the enclosing activity using onActivityResult as usual.

例如，

在适配器中:

MyAdapter(Context context) {
    mContext = context;
}

public View getView(int position, View convertView, ViewGroup parent) {
    …
    open.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            …
            Activity origin = (Activity)mContext;
            origin.startActivityForResult(new Intent(mContext, SecondActivity.class), requestCode);
        }   
    });
    …
}

public  void onActivityResult(int requestCode, int resultCode, Intent data) {
    Log.d("MyAdapter", "onActivityResult");
}

在第二项活动中，与往常一样使用setResult和finish.

In your second activity, do as usual with setResult and finish.

在您的主要活动中，捕获结果并传递给适配器回调:

In your main activity, capture the result and pass to the adapter callback:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    mAdapter.onActivityResult(requestCode, resultCode, data);
}

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