我有一个回收 View ，它从服务器填充数据，里面的组件是一个textView和一个Switch。服务器可以返回n条数据。当我填充数据时，如何为 Switch2 设置唯一的 id，因为稍后我需要为开关设置一个监听器，我的服务器实际上返回一个唯一的 id，但我不是这样确定如何将其设置为 Switch2，或者是否有任何替代参数可用于识别 Switch？
布局
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:layout_editor_absoluteY="81dp">
<android:android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
card_view:cardElevation="1dp"
card_view:cardUseCompatPadding="true"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Switch
android:id="@+id/switch2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="left|center_vertical"
android:paddingLeft="5dip"
android:layout_marginTop="16dp"
app:layout_constraintTop_toTopOf="parent"
tools:layout_editor_absoluteX="254dp" />
<TextView
android:id="@+id/user_set_light_id"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:fontFamily="sans-serif"
android:text="TextView"
android:textSize="20dp"
tools:layout_editor_absoluteX="27dp"
tools:layout_editor_absoluteY="23dp" />
</RelativeLayout>
</android:android.support.v7.widget.CardView>
</android.support.constraint.ConstraintLayout>
适配器
public class populateLights_adapter extends RecyclerView.Adapter<populateLights_adapter.ViewHolder> {
private List<populate_lights> listItems;
private Context context;
public populateLights_adapter(List<populate_lights> listItems, Context context) {
this.listItems = listItems;
this.context = context;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.addlight_items, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
populate_lights listItem = listItems.get(position);
holder.lightText.setText(listItem.getLightName());
holder.status.setChecked(listItem.getState());
}
@Override
public int getItemCount() {
return listItems.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
public TextView lightText;
public Switch status;
public ViewHolder(View itemView) {
super(itemView);
lightText = (TextView) itemView.findViewById(R.id.user_set_light_id);
status = (Switch) itemView.findViewById(R.id.switch2);
}
}
}
java类
public class populate_lights {
private String lightName;
private boolean state;
public populate_lights(String lightName, boolean state){
this.lightName = lightName;
this.state = state;
}
public String getLightName(){
return lightName;
}
public boolean getState(){
return state;
}
}
主要
public class lightsControl extends Fragment {
View myView;
public static final String URL = "serverurl.com";
private RecyclerView recyclerView;
private RecyclerView.Adapter adapter;
private List<populate_lights> listItems;
private Switch mySwitch;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
myView = inflater.inflate(R.layout.lightscontrol, container, false);
recyclerView = (RecyclerView) myView.findViewById(R.id.lightsView);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this.getActivity()));
listItems = new ArrayList<>();
loadData();
adapter = new populateLights_adapter(listItems, myView.getContext());
recyclerView.setAdapter(adapter);
return myView;
}
private void loadData(){
final ProgressDialog progressDialog = new ProgressDialog(myView.getContext());
progressDialog.setMessage("Loading");
progressDialog.show();
StringRequest stringRequest = new StringRequest(Request.Method.POST,
URL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
progressDialog.dismiss();
Snackbar mySnackbar = Snackbar.make(myView, "Data Fetched!", Snackbar.LENGTH_SHORT);
mySnackbar.show();
Log.v("DATA_RESPONSE", response);
try {
JSONObject jsonObject = new JSONObject(response);
JSONArray array = jsonObject.getJSONArray("lightData");
for(int i=0;i<array.length();i++){
JSONObject obj = array.getJSONObject(i);
Log.v("LIGHT ID ", "index=" + obj.getString("LightID"));
Log.v("Value ", "index=" + obj.getBoolean("Value"));
populate_lights popLights = new populate_lights(
obj.getString("LightID"), //unique id
obj.getBoolean("Value") //value returns true, or false
);
listItems.add(popLights);
}
adapter = new populateLights_adapter(listItems, myView.getContext());
recyclerView.setAdapter(adapter);
}
catch(Exception e){
e.printStackTrace();
}
}},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Snackbar mySnackbar = Snackbar.make(myView, "Oops, there was an error communicating with our server, try again", Snackbar.LENGTH_SHORT);
mySnackbar.show();
Log.v("LoginFormERROR", "index=" + error);
progressDialog.dismiss();
}
}
)
};
RequestQueue requestQueue = Volley.newRequestQueue(myView.getContext());
requestQueue.add(stringRequest);
}
public void showErrorAlert(){
AlertDialog.Builder builder1 = new AlertDialog.Builder(myView.getContext());
builder1.setMessage("Opps, something went wring");
builder1.setCancelable(true);
builder1.setPositiveButton(
"Main Menu",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
getActivity().onBackPressed();
}
});
AlertDialog alert11 = builder1.create();
alert11.show();
}
}
屏幕截图
最佳答案
查看此代码是否在日志中打印正确的位置。将其放入适配器类中 View 持有者的构造函数中:
status.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
Log.d("Position: ", String.valueOf(getLayoutPosition()));
}
});
关于java - 为 Switch 设置 id，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/48183552/