如何在Android中从RecyclerView适配器获取项目
在旧代码中,当我使用带有自定义适配器的如何在Android中从RecyclerView适配器获取项目,android,android-recyclerview,Android,Android Recyclerview,在旧代码中,当我使用带有自定义适配器的ListView时,我可以使用此代码获取项目 Message msg = (Message) adapter.getItem(poistion); 现在我正在实现RecyclerView。如何从RecyclerView.adapter获取项目?您必须自己实现它 在自定义适配器中添加一个新方法,就完成了 public Message getItem(int position) { return messageList.get(position); }
ListView
时,我可以使用此代码获取项目
Message msg = (Message) adapter.getItem(poistion);
现在我正在实现
RecyclerView
。如何从RecyclerView.adapter
获取项目?您必须自己实现它
在自定义适配器中添加一个新方法,就完成了
public Message getItem(int position) {
return messageList.get(position);
}
我认为
getItem()
的正确方法是通过RecyclerView LayoutManager
View v = recyclerView.getLayoutManager().findViewByPosition(position);
在recycleview中,您可以使用以下代码从recycleview适配器获取项目
RecyclerView rv_list_frames;
public frames getItem(int position) {
return rv_list_frames.get(position);
}
我希望上面的内容能够帮助您获取项目。单击Listener完成了这项任务
public class MainActivity extends AppCompatActivity {
Context context;
RecyclerView recyclerView;
RelativeLayout relativeLayout;
RecyclerView.Adapter recyclerviewAdapter;
RecyclerView.LayoutManager recyclerViewLayoutManager;
String[] numbers = { "ANDROID",
"PHP",
"BLOGGER",
"WORDPRESS",
"JOOMLA",
"ASP.NET",
"JAVA",
"C++",
"MATHS",
"HINDI",
"ENGLISH"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = getApplicationContext();
relativeLayout = (RelativeLayout)findViewById(R.id.relativelayout1);
recyclerView = (RecyclerView)findViewById(R.id.recyclerview1);
recyclerViewLayoutManager = new LinearLayoutManager(context);
recyclerView.setLayoutManager(recyclerViewLayoutManager);
recyclerviewAdapter = new RecyclerViewAdapter(context,numbers);
recyclerView.setAdapter(recyclerviewAdapter);
}
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder> {
String[] numvalues;
Context context;
View view1;
ViewHolder viewHolder1;
TextView textView;
public RecyclerViewAdapter(Context context1,String[] numvalues1){
numvalues = numvalues1;
context = context1;
}
public class ViewHolder extends RecyclerView.ViewHolder{
public TextView textView;
public ViewHolder(View v){
super(v);
textView = (TextView)v.findViewById(R.id.number_textview);
}
}
@Override
public RecyclerViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
view1 = LayoutInflater.from(context).inflate(R.layout.recyclerview_items,parent,false);
// view1.setOnClickListener(new MyOnClickListener());
view1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int itemPosition = recyclerView.indexOfChild(v);
// Toast.makeText(MainActivity.this,"Selected item position is---"+ itemPosition,Toast.LENGTH_SHORT).show();
textView = (TextView)v.findViewById(R.id.number_textview);
Toast.makeText(MainActivity.this,"Selected val of clicked position is---"+ textView.getText().toString(),Toast.LENGTH_SHORT).show();
}
});
viewHolder1 = new ViewHolder(view1);
return viewHolder1;
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.textView.setText(numvalues[position]);
}
@Override
public int getItemCount() {
return numvalues.length;
}
}
}
public类MainActivity扩展了AppCompatActivity{
语境;
回收视图回收视图;
相对的相对的;
适配器RecycleWebAdapter;
RecyclerView.LayoutManager recyclerViewLayoutManager;
字符串[]数字={“安卓”,
“PHP”,
“博主”,
“WORDPRESS”,
“约姆拉”,
“ASP.NET”,
“爪哇”,
“C++”,
“数学”,
“印地语”,
“英语”};
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context=getApplicationContext();
relativeLayout=(relativeLayout)findViewById(R.id.relativelayout1);
recyclerView=(recyclerView)findViewById(R.id.RecyclerViewW1);
recyclerViewLayoutManager=新的LinearLayoutManager(上下文);
recyclerView.setLayoutManager(recyclerViewLayoutManager);
RecycleServiceAdapter=新的RecycleServiceAdapter(上下文、数字);
设置适配器(RecycleWebAdapter);
}
公共类RecycleServiceAdapter扩展了RecyclerView.Adapter{
字符串[]numvalue;
语境;
视图1;
视窗持有者视窗持有者1;
文本视图文本视图;
公共RecycleServiceAdapter(上下文上下文1,字符串[]numvalues1){
numvalues=numvalues1;
上下文=上下文1;
}
公共类ViewHolder扩展了RecyclerView.ViewHolder{
公共文本视图文本视图;
公共视图持有者(视图v){
超级(五);
textView=(textView)v.findViewById(R.id.number\u textView);
}
}
@凌驾
public RecycleServiceAdapter.ViewHolder onCreateViewHolder(视图组父级,int-viewType){
view1=LAYOUTINGFLATER.from(上下文)。充气(R.LAYOUTING.RecyclerViewU项,父项,false);
//view1.setOnClickListener(新的MyOnClickListener());
view1.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图v){
int itemPosition=recyclerView.indexOfChild(v);
//Toast.makeText(MainActivity.this,“所选项目位置为--”+itemPosition,Toast.LENGTH_SHORT).show();
textView=(textView)v.findViewById(R.id.number\u textView);
Toast.makeText(MainActivity.this,“单击位置的选定值为----”+textView.getText().toString(),Toast.LENGTH_SHORT.show();
}
});
viewHolder1=新的ViewHolder(view1);
返回viewHolder1;
}
@凌驾
公共无效onBindViewHolder(ViewHolder,int位置){
holder.textView.setText(numvalues[position]);
}
@凌驾
public int getItemCount(){
返回numvalues.length;
}
}
}
当然可以。。但是为了将消息
对象作为返回值,您需要将项目列表设置为列表代码>在适配器中。这是如何获取视图,而不是支持视图的数据。@PhoenixFF true,但如果您将EditText作为项,这是获取其值的最佳方法(在用户更改后)!:)如何获得此位置如何从视图中获取数据?(假设它有一个名为“tv”的文本视图)这将返回视图而不是项目。到底是什么?
@Override public void onClick(View view, int position) {
System.out.println("cardetail_activity"+position);
Intent i = new Intent(getActivity(), CarDetail.class);
ListingDataprovider data_provider=arrayList.get(position); i.putExtra("ID",data_provider.getId()); getActivity().startActivity(i);
}