[英]How to transfer string from TextView to main activity with onClick listener
I want to create an onclick listener that reads the String from one TextView and then I somehow pass that string onto the main activity in order to open a third activity我想创建一个 onclick 侦听器,它从一个 TextView 读取字符串,然后我以某种方式将该字符串传递给主要活动以打开第三个活动
So my main activity looks like this所以我的主要活动看起来像这样
public class AdvancedResults extends AppCompatActivity {
private RecyclerView mRecyclerView;
private AdvancedAdapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
private ArrayList<String> mNames = new ArrayList<>();
private ArrayList<String> mImageUrls = new ArrayList<>();
private ArrayList<String> saved_recipes_with_ingredients = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_advanced_results);
advancedList.add(new AdvancedItem(R.drawable.ic_android, "test1", "test2");
advancedList.add(new AdvancedItem(R.drawable.ic_android, "test3", "test4");
mRecyclerView = findViewById(R.id.recyclerView1);
mRecyclerView.setHasFixedSize(true);
mLayoutManager = new LinearLayoutManager(this);
mAdapter = new AdvancedAdapter(advancedList);
mRecyclerView.setLayoutManager(mLayoutManager);
mRecyclerView.setAdapter(mAdapter);
mAdapter.setOnItemClickListener(new AdvancedAdapter.OnItemClickListener() {
@Override
public void onItemClick(int position) {
// I want to open a new activity and append the string from the TextView here (maybe with get/set)
}
});
}
And my recycler adapter looks like this我的回收器适配器看起来像这样
public class AdvancedAdapter extends RecyclerView.Adapter<AdvancedAdapter.AdvancedViewHolder> {
private ArrayList<AdvancedItem> mAdvancedList;
private OnItemClickListener mListener;
public interface OnItemClickListener {
void onItemClick(int position);
}
public void setOnItemClickListener(OnItemClickListener listener) {
mListener = listener;
}
public static class AdvancedViewHolder extends RecyclerView.ViewHolder {
public ImageView mImageView;
public TextView mTextView1;
public TextView mTextView2;
public AdvancedViewHolder(View itemView, final OnItemClickListener listener) {
super(itemView);
mImageView = itemView.findViewById(R.id.imageViewADV);
mTextView1 = itemView.findViewById(R.id.textViewADV1);
mTextView2 = itemView.findViewById(R.id.textViewADV2);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (listener != null) {
int position = getAdapterPosition();
//how do I get the string from the TextView and pass it onto the main class?
if (position != RecyclerView.NO_POSITION) {
listener.onItemClick(position);
}
}
}
});
}
}
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, mListener);
return evh;
}
@Override
public void onBindViewHolder(AdvancedViewHolder holder, int position) {
AdvancedItem currentItem = mAdvancedList.get(position);
holder.mImageView.setImageResource(currentItem.getImageResource());
holder.mTextView1.setText(currentItem.getText1());
holder.mTextView2.setText(currentItem.getText2());
}
@Override
public int getItemCount() {
return mAdvancedList.size();
}
i'm just not sure how im supposed to do that and what method to use.我只是不确定我应该怎么做以及使用什么方法。
So if you want the text from the text view you do:因此,如果您想要文本视图中的文本,请执行以下操作:
String text = textViewId.getText();
But in your case you want to add the text for each one of the views on the list但是在您的情况下,您想为列表中的每个视图添加文本
So on the adapter how make a on click listener:所以在适配器上如何制作一个点击监听器:
if (listener != null) {
int position = getAdapterPosition();
String text = mTextView1.getText();
Intent i = new Intent(getApplicationContext(), YourActitivity.class);
i.putExtra("nameYouWant", text)
startActivity(i);
if (position != RecyclerView.NO_POSITION) {
listener.onItemClick(position);
}
Now on your activity:现在开始你的活动:
String text = intent.getStringExtra("nameYouWant");
You can use interface to pass the second String param.您可以使用接口来传递第二个字符串参数。 So just add one String param like this -
所以只需像这样添加一个字符串参数 -
public interface OnItemClickListener {
void onItemClick(int position, String text);
}
And in adapter pass the string on click of the item along with the position并在适配器中通过单击项目的字符串以及 position
listener.onItemClick(position, mTextView1.getText().toString());
And in the activity, you will receive the String text, from there you can pass it to ThirdActivity via bundle.在活动中,您将收到字符串文本,您可以从那里通过捆绑将其传递给 ThirdActivity。
mAdapter.setOnItemClickListener(new AdvancedAdapter.OnItemClickListener() {
@Override
public void onItemClick(int position, String textData) {
Intent i = new Intent(this, ThirdActivity.class);
i.putExtra("TEXT_KEY", textData);
}
});
Hope it will help!!希望它会有所帮助!
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