安卓系统:点击回收器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个图像按钮的回收器视图。我想点击图像按钮，然后打开一个新的活动，并将文本从textViewADV1转移到下一个活动

我的回收视图中的items.xml由以下组成

<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);
}

我试着做textViewADV1.getText().toString()，但它只读取回收器视图中第一个项目的文本

我的回收器适配器

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

public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

初始化adapter时，首先将context传递给它：

//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AdvancedAdapter中的onBindViewHolder

@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

如果您已经在适配器类中声明了onBindViewHolder((，那么为什么要从MainActivity启动活动。您应该在onBindViewHolder((中添加setOnclicklisten((，以实现您想要的结果，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，在您实现recyclerView的活动中初始化此适配器，并将该arraylist发送到适配器的构造函数的参数中：(如果还不理解，您可以尝试下面给出的链接上的教程：https://www.youtube.com/watch?v=bIppSKk9afI