Android：点击回收器视图内的图像按钮时，从Textview传递文本

Question

所以我有一个回收器视图，有2个文本和1个图像按钮。我想单击图像按钮，然后打开一个新活动，并将文本从text ViewADV1传输到下一个活动

我的项目。我的回收视图中的xml由以下内容组成

 <ImageButton
        android:id="@+id/imageButton1"
        android:clickable="true"
        android:onClick="openActivity2"/>

    <TextView
        android:id="@+id/textViewADV1"
        android:text="Line 1"/>

    <TextView
        android:id="@+id/textViewADV2"
        android:text="Line 2"/>

我的openActivity2（）来自主活动

public void openActivity2(View view)
        {
            Intent intentLoadNewActivity = new Intent(AdvancedResults.this,OpenSelectedAdvanced.class);
            startActivity(intentLoadNewActivity);
        }

我尝试做text ViewADV1.getText（）. toString（）但它只从回收器视图中的第一项读取文本

我的回收器适配器

public class AdvancedAdapter extends RecyclerView.Adapter<AdvancedAdapter.AdvancedViewHolder> {
    private ArrayList<AdvancedItem> mAdvancedList;

公共字符串mImage；

    public static class AdvancedViewHolder extends RecyclerView.ViewHolder {
        public ImageButton mImagebtn;
        public TextView mTextView1;
        public TextView mTextView2;

        public AdvancedViewHolder(View itemView) {
            super(itemView);
            mImagebtn = itemView.findViewById(R.id.imageButtonADV);
            mTextView1 = itemView.findViewById(R.id.textViewADV1);
            mTextView2 = itemView.findViewById(R.id.textViewADV2);
        }
    }

    public AdvancedAdapter(ArrayList<AdvancedItem> advancedList) {
        mAdvancedList = advancedList;
    }

    @Override
    public AdvancedViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.advanced_item, parent, false);
        AdvancedViewHolder evh = new AdvancedViewHolder(v);
        return evh;
    }

    @Override
    public void onBindViewHolder(AdvancedViewHolder holder, int position) {
        AdvancedItem currentItem = mAdvancedList.get(position);
        holder.mTextView1.setText(currentItem.getText1());
        holder.mTextView2.setText(currentItem.getText2());
        mImage = "www.testImageURL.com";
        Picasso.get().load(mImage).into(holder.mImagebtn);
    }

    @Override
    public int getItemCount() {
        return mAdvancedList.size();
    }
}

Answer 1

如果您已经在适配器类中声明了onBindViewHolder（），那么为什么要从MainActivity启动activity呢。您应该在onBindViewHolder（）中添加setOnclicklistenr（），以实现所需的结果，方法如下：

public class AdvancedAdapter extends RecyclerView.Adapter<AdvancedAdapter.AdvancedViewHolder> {
private ArrayList<AdvancedItem> mAdvancedList;
//one more thing you have to create Context field so that you can
 //you can start the activity from any context (From Any activity)
 private Context mContext;

  public String mImage;

public static class AdvancedViewHolder extends RecyclerView.ViewHolder        {
    public ImageButton mImagebtn;
    public TextView mTextView1;
    public TextView mTextView2;

    public AdvancedViewHolder(View itemView) {
        super(itemView);
        mImagebtn = itemView.findViewById(R.id.imageButtonADV);
        mTextView1 = itemView.findViewById(R.id.textViewADV1);
        mTextView2 = itemView.findViewById(R.id.textViewADV2);
    }
}

public AdvancedAdapter(ArrayList<AdvancedItem> advancedList, Context mContext) {
    mAdvancedList = advancedList;
    this.mContext = mContext;
}

@Override
public AdvancedViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.advanced_item, parent, false);
    AdvancedViewHolder evh = new AdvancedViewHolder(v);
    return evh;
}

@Override
public void onBindViewHolder(AdvancedViewHolder holder, int position) {
    AdvancedItem currentItem = mAdvancedList.get(position);
    holder.mTextView1.setText(currentItem.getText1());
    holder.mTextView2.setText(currentItem.getText2());
    mImage = "www.testImageURL.com";
    holder.mImage.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // Here You start your activity
            Intent intent = new Intent(mContext, Activity2.class);
            //you can putExtras here
            mContext.startActivity(intent);
    });
    Picasso.get().load(mImage).into(holder.mImagebtn);
}

@Override
public int getItemCount() {
    return mAdvancedList.size();
}
   }

现在在你的活动中初始化这个适配器，在那里你实现了回收器视图并将数组列表发送到你的适配器的构造函数的参数中：）如果还不明白，你可以在下面给出的链接上尝试教程：https://www.youtube.com/watch?v=bIppSKk9afI

Answer 2

首先，在初始化适配器时，将上下文传递给适配器：

//in the main activity that you initialize the adapter in

AdvancedAdapter adapter = new AdvancedAdapter(your_list , MainActivity.this);

现在更改AdvancedAdapter的构造函数以接受上下文

 public class AdvancedAdapter extends RecyclerView.Adapter<AdvancedAdapter.AdvancedViewHolder> {

private ArrayList<AdvancedItem> mAdvancedList;

private Context context;

.............

//constructor

public AdvancedAdapter(ArrayList<AdvancedItem> advancedList,Context context) {
mAdvancedList = advancedList;
this.context = context;
}

现在在onBindViewHolder中的AdvancedAdapter

@Override
public void onBindViewHolder(AdvancedViewHolder holder, int position) {
AdvancedItem currentItem = mAdvancedList.get(position);
holder.mTextView1.setText(currentItem.getText1());
holder.mTextView2.setText(currentItem.getText2());
mImage = "www.testImageURL.com";
Picasso.get().load(mImage).into(holder.mImagebtn);

//on click image button

hodler.mImagebtn.setOnclickListener(new View.OnClickListener(){

@Override
public void onClick(View view){

Intent intent = new Intent(context , OpenSelectedAdvanced.class);
intent.putExtra("data" , currentItem.getText1());
context.startActivity(intent);
}

});

}

要从OpenSelectedAdvanced活动获取数据：

//in oncreate method:

Intent intent = getIntent();

//this is your text view text that came from the clicked image button
String transferedText = intent.getStringExtra("data");