Java 从 RecyclerView 中的 ViewHolder 调用活动？
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Calling activity from ViewHolder in RecyclerView?
提问by K20GH
I've got a RecyclerView which is loading the content of my String arrays which works fine, however I want to open a new activity depending on which view they have pressed.
我有一个 RecyclerView 正在加载我的字符串数组的内容，它工作正常，但是我想根据他们按下的视图打开一个新活动。
What I have done is created an array called classes like so:
我所做的是创建了一个名为 classes 的数组，如下所示：
<array name="classes">
<item>ClassOne</item>
<item>ClassTwo</item>
<item>ClassThree</item>
<item>ClassFour</item>
</array>
These are stored in an array, and passed to my MainActivityList adapter below:
这些存储在一个数组中，并传递到下面的 MainActivityList 适配器：
String[] classes = resource.getStringArray(R.array.classes);
MainActivityList adapter = new MainActivityList(titles,content, images, classes);
recyclerView.setAdapter(adapter);
I've managed to add the OnClickListener to the ViewHolder and output what class is assigned to each view to the log, however I cannot figure out or get working, how to launch another activity.
我设法将 OnClickListener 添加到 ViewHolder 并将分配给每个视图的类输出到日志，但是我无法弄清楚或开始工作，如何启动另一个活动。
The class name would be something like ClassOne.class for example
例如，类名将类似于 ClassOne.class
public class MainActivityList extends RecyclerView.Adapter<MainActivityList.ViewHolder> {
private String[] mTitles;
private String[] mContent;
private String[] mClasses;
private TypedArray mImages;
private Context context;
public MainActivityList(String[] titles, String[] content, TypedArray images, String[] classes) {
this.mTitles = titles;
this.mContent = content;
this.mImages = images;
this.mClasses = classes;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup,int i) {
final View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.activity_main_card, viewGroup, false);
ViewHolder vh = new ViewHolder(v);
v.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
ViewHolder vh = (ViewHolder)v.getTag();
Log.v("DEBUG", "Clicked" + vh.classes);
}
});
return vh;
}
public void onBindViewHolder(ViewHolder holder, int position) {
holder.titleView.setText(mTitles[position]);
holder.contentView.setText(mContent[position]);
holder.imageView.setImageDrawable(mImages.getDrawable(position));
holder.classes = mClasses[position];
}
public class ViewHolder extends RecyclerView.ViewHolder {
public TextView titleView;
public TextView contentView;
public ImageView imageView;
public String classes;
public ViewHolder(View v) {
super(v);
titleView = (TextView) v.findViewById(R.id.card_title);
contentView = (TextView) v.findViewById(R.id.card_content);
imageView = (ImageView)v.findViewById(R.id.card_image);
v.setTag(this);
}
}
@Override
public int getItemCount() {
return mTitles.length;
}
}
采纳答案by paradite
I was also looking for a solution, and I found this post: http://venomvendor.blogspot.sg/2014/07/setting-onitemclicklistener-for-recycler-view.html
我也在寻找解决方案，我找到了这篇文章：http: //venomvendor.blogspot.sg/2014/07/setting-onitemclicklistener-for-recycler-view.html
By using the OnItemClickListener interface, you should be able to call startActivityin your activity.
通过使用 OnItemClickListener 接口，您应该能够调用startActivity您的活动。
adapter.SetOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(View v , int position) {
// This is in an Activity so should be able to start new activity, etc.
}
});
Update: I have tested, the method mentioned in the blog worked for me.
更新：我已经测试过了，博客中提到的方法对我有用。
回答by r j
Intent intent = new Intent(viewObject.getContext(),ActivityName.class);
viewObject.getContext().startActivity(intent);
