Android：单击回收站视图中的图像按钮时，从 Textview 传递文本

Question

所以我有一个带有 2 个文本和 1 个图像按钮的回收站视图。我想单击图像按钮，然后打开一个新活动并将文本从textViewADV1 转移到下一个活动

我的 recyclerview 中的项目 .xml 包含以下内容

 <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"/>

主活动中的我的 openActivity2()

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

我尝试过textViewADV1.getText().toString()，但它只读取回收站视图中第一项的文本

我的回收适配器

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

首先在初始化时将context 传递给您的adapter：

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

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

现在将AdvancedAdapter的构造函数改为接受context

 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 在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);
}

});

}

从OpenSelectedAdvanced活动中获取数据：

//in oncreate method:

Intent intent = getIntent();

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

Answer 2

如果您在适配器类中声明了 onBindViewHolder()，那么为什么要从 MainActivity 开始活动。您应该在 onBindViewHolder() 中添加 setOnclicklistenr() 以通过以下方式实现所需的结果：

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();
}
   }

现在在您实现 recyclerView 的活动中初始化此适配器，并将该数组列表发送到适配器的构造函数的参数中：) 如果还不明白，您可以尝试下面给出的链接上的教程：https://www.youtube.com/watch?v=bIppSKk9afI