问题描述
我制作了一个带有CardViews的RecyclerView ，它从Cloud Firestore检索了两个TextViews ，每当我单击该卡时，我都希望基于Firestore数据库中存储的pdfUrl进行操作，以使用pdf打开活动或将pdf下载到电话。
但我不知道该如何实现。
我的代码：
public class RecylerViewTestsActivity extends AppCompatActivity {
RecyclerView recyclerView;
private FirebaseFirestore db = FirebaseFirestore.getInstance();
private FirestoreRecyclerAdapter<uploadTests, TestesViewHolder> adapter;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.recyler_view_tests);
RecyclerView recyclerView = findViewById(R.id.recyclerViewTests);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
FirebaseFirestore rootRef = FirebaseFirestore.getInstance();
Query query = rootRef.collection("FilterPDFUploads");
FirestoreRecyclerOptions<uploadTests> options = new FirestoreRecyclerOptions.Builder<uploadTests>()
.setQuery(query, uploadTests.class)
.build();
adapter = new FirestoreRecyclerAdapter<uploadTests,TestesViewHolder >(options) {
@Override
protected void onBindViewHolder(@NonNull TestesViewHolder holder, int position, @NonNull uploadTests model) {
holder.setTestesDesc(model.getDescription());
holder.setTestesName(model.getUsername());
}
@NonNull
@Override
public TestesViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.pdf_tests_items, parent, false);
return new TestesViewHolder(view);
}
};
recyclerView.setAdapter(adapter);
}
//////////////////////////VIEW HOLDER////////////////////////////////////////////
private class TestesViewHolder extends RecyclerView.ViewHolder {
private View view;
private CardView itemsCard;
TestesViewHolder(final View itemView) {
super(itemView);
view = itemView;
}
void setTestesDesc (String descri) {
TextView desc = view.findViewById(R.id.teste_description);
desc.setText(descri);
}
void setTestesName (String username) {
TextView user = view.findViewById(R.id.name_id);
user.setText(username);
}
void setPdfUrl(final String url){
}
}
//////////////////////////VIEW HOLDER////////////////////////////////////////////
@Override
protected void onStart() {
super.onStart();
adapter.startListening();
}
@Override
protected void onStop() {
super.onStop();
if (adapter != null) {
adapter.stopListening();
}
}
}
1楼
每当我单击该卡时，我都希望根据存储在我的Firestore数据库中的pdfUrl将该活动与pdf打开或将pdf下载到手机中
要解决此问题，您应该在TestesViewHolder对象上使用setOnClickListener() 。
在点击监听器中，请添加以下代码行：
Uri uri = Uri.parse(url);
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
startActivity(intent);
其中url是存储在数据库中的实际URL。
而已！