我正在使用RecyclerView类设置Adapter，以使用由TextView和ImageView组成的对象来填充它。我要用作我的TextView文本的字符串已传递并保存在我的Parcelable对象PlaceObject类中，并作为string resource保存。问题是，尽管我已经设法通过getString(placeObject.getName())类中的DetailsActivity访问字符串值，但是当我在{{ 1}}的{{1}}方法。有什么想法吗？
我已经阅读了其他文章，您可以像在Java中那样使用ResourceNotFoundException来执行相同的操作，但是由于我在文档中看到了可用的Resources.getSystem().getString(event.name)方法，因此我无法做到这一点不要接受LocalEventsAdapter作为参数。我还在另一篇文章中找到了onBindViewHolder解决方案，但这也不起作用。
这是我的getString类，扩展了getString：
ints现在下面是我的Resources.getSystem().getString()类，其中有一个PlaceObject实例以Parcelable interface的形式添加到我的class PlaceObject : Parcelable { // Implementing the Parcelable interface to allow for cleaner and faster code
private val TAG = PlaceObject::class.java.simpleName
private val baseMapSearchUrl = "https://www.google.com/maps/search/?api=1&query=" // Base url for launching a Map activity with a Search Intent
// Using int so that the values can be accessed via R.string etc.
var name: Int = 0
private set
var description: Int = 0
private set
var category: Int = 0
private set
var locationDistance: String? = "location"
private set
private var finalMapSearchUrl = baseMapSearchUrl
val mapSearchUrl: String
get() {
Log.d(TAG, "finalMapSearchUrl = $finalMapSearchUrl")
return finalMapSearchUrl
}
internal constructor(name: Int, description: Int, category: Int, locationDistance: String, mapUrlParam: String) {
this.name = name
this.description = description
this.locationDistance = locationDistance
this.category = category
finalMapSearchUrl += Uri.encode(mapUrlParam)
}
private constructor(`in`: Parcel) {
name = `in`.readInt()
description = `in`.readInt()
locationDistance = `in`.readString()
category = `in`.readInt()
finalMapSearchUrl = `in`.readString().toString()
}
override fun describeContents(): Int {
return 0
}
override fun writeToParcel(parcel: Parcel, i: Int) {
parcel.writeInt(name)
parcel.writeInt(description)
parcel.writeString(locationDistance)
parcel.writeInt(category)
parcel.writeString(finalMapSearchUrl)
}
companion object CREATOR : Parcelable.Creator<PlaceObject> {
override fun createFromParcel(parcel: Parcel): PlaceObject {
return PlaceObject(parcel)
}
override fun newArray(size: Int): Array<PlaceObject?> {
return arrayOfNulls(size)
}
}
}
包中，然后您可以看到，检索它，将其分配给本地DetailsActivity变量，然后在PlaceObject方法内部，我使用行MainActivity访问Parcelable资源。这似乎工作正常，并且资源ID从一个类传递到另一类而没有问题。
placeObject但是在我的initializeData()类中，当我尝试做类似的事情时，当我在string方法中使用placeName.setText(getString(placeObject.getName()));时，我会被抛出public class DetailsActivity extends BaseActivity {
private static final String TAG = DetailsActivity.class.getSimpleName();
// Intent Parcelable key
private static final String PARCELABLE_KEY = "parcelable";
private PlaceObject placeObject;
private String placeCategory;
@BindView(R.id.details_toolbar)
Toolbar detailsToolbar;
@BindView(R.id.toolbar_title)
TextView toolbarTitle;
@BindView(R.id.show_in_map_button)
Button mapButton;
@BindView(R.id.place_image)
ImageView placeImg;
@BindView(R.id.place_name)
TextView placeName;
@BindView(R.id.place_description)
TextView placeDesc;
@BindView(R.id.place_location)
TextView placeLocation;
@OnClick(R.id.show_in_map_button) void openMap() {
String mapSearchUrl = placeObject.getMapSearchUrl();
Log.d(TAG,"mapSearchUri = [" + mapSearchUrl + "]");
Uri gmIntentUri = Uri.parse(mapSearchUrl); // Create a Uri from a string. Use the result to create an Intent
Intent mapIntent = new Intent(Intent.ACTION_VIEW,gmIntentUri);
// Make the Intent explicit by settings the Google Maps package
mapIntent.setPackage("com.google.android.apps.maps");
// Verify that there is an app available to receive the intent (e.g: Google Maps)
if(mapIntent.resolveActivity(getPackageManager()) != null) {
startActivity(mapIntent); // if the result is non-null there is at least one app that can handle the intent
} else {
Log.d(TAG,"Error resolving Activity for map Intent in openMap(), [Uri = " + gmIntentUri + "].");
Log.d(TAG,"mapIntent.resolveActivity() = " + mapIntent.resolveActivity(getPackageManager()));
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
turnStatusBarTransparent(this);
setContentView(R.layout.activity_details);
ButterKnife.bind(this);
// Toolbar-ActionBar related
detailsToolbar.setNavigationIcon(R.drawable.baseline_arrow_back_ios_white_24); // setting the back button icon
setSupportActionBar(detailsToolbar);
ActionBar actionBar = getSupportActionBar();
if (actionBar != null) {
actionBar.setDisplayShowTitleEnabled(false);
}
toolbarTitle.setText(getResources().getString(R.string.details_page_title));
detailsToolbar.setNavigationOnClickListener(view -> finish()); // When the back button is pressed, end the activity
scaleButtonDrawable();
getIntentData(getIntent());
initializeData();
}
/**
* Updates the layout's views with the right data
*/
private void initializeData() {
placeName.setText(getString(placeObject.getName()));
placeDesc.setText(getString(placeObject.getDescription()));
placeLocation.setText(placeObject.getLocationDistance());
placeCategory = getString(placeObject.getCategory());
try {
placeImg.setImageDrawable(determineImageResource());
} catch (NullPointerException npe) {
npe.printStackTrace();
Log.d(TAG,"Null Pointer Exception in determineImageResource()");
}
}
/**
* Determines which image drawable to use for the
* selected UI item based on it's name.
* @return Returns the drawable resource for the image
*/
private Drawable determineImageResource() {
if(placeCategory.equals(getString(R.string.beach_category))) {
switch (getString(placeObject.getName())) {
case "Spilia":
return getResources().getDrawable(R.drawable.spilia,null);
case "Plakes":
return getResources().getDrawable(R.drawable.plakes,null);
case "Bisti":
return getResources().getDrawable(R.drawable.bisti,null);
default:
Log.d(TAG,"Error resolving Beach name in determineImageResource()");
return getResources().getDrawable(R.drawable.beach_bg_placeholder,null);
}
} else if(placeCategory.equals(getString(R.string.museum_category))) {
switch (getString(placeObject.getName())) {
case "Historical Archives Museum":
return getResources().getDrawable(R.drawable.historical_archives_museum,null);
case "Ecclesiastical Museum":
return getResources().getDrawable(R.drawable.ecclesiastical_museum,null);
default:
Log.d(TAG,"Error resolving Museum name in determineImageResource()");
return getResources().getDrawable(R.drawable.beach_bg_placeholder,null);
}
} else if(placeCategory.equals(getString(R.string.event_category))) {
switch (getString(placeObject.getName())) {
case "Miaoulia":
disableMapButton();
return getResources().getDrawable(R.drawable.miaoulia_event,null);
default:
Log.d(TAG,"Error resolving Event name in determineImageResource()");
return getResources().getDrawable(R.drawable.beach_bg_placeholder,null);
}
} else if(placeCategory.equals("Restaurant")) {
switch (getString(placeObject.getName())) {
case "Techne":
return getResources().getDrawable(R.drawable.techne_restaurant,null);
case "Xeri Elia":
return getResources().getDrawable(R.drawable.xeri_elia_restaurant,null);
case "Sunset":
return getResources().getDrawable(R.drawable.sunset_restaurant,null);
default:
Log.d(TAG,"Error resolving Restaurant name in determineImageResource()");
return getResources().getDrawable(R.drawable.beach_bg_placeholder,null);
}
} else {
Log.d(TAG,"Couldn't determine imageResource in determineImageResource(). Using placeholder image.");
return getResources().getDrawable(R.drawable.beach_bg_placeholder,null);
}
}
/**
* Hides the "Show In Map" button from the UI
*/
private void disableMapButton() {
mapButton.setVisibility(View.GONE);
}
/**
* Unpacks the data from the intent and assigns
* it to the respective fields
* @param intent The calling Intent
*/
private void getIntentData(Intent intent) {
Bundle dataBundle = intent.getExtras();
if (dataBundle != null) {
placeObject = dataBundle.getParcelable(PARCELABLE_KEY);
} else {
Log.d(TAG,"Data bundle in getIntentData() is null");
}
}
/**
* Scales the "Show in Map" Button's drawable to fit
* into the button correctly.
*/
private void scaleButtonDrawable() {
// Scales down the button's drawable to fit the button
Drawable drawable = getResources().getDrawable(R.drawable.location_btn,null);
drawable.setBounds(new Rect(0,0,70,70));
mapButton.setCompoundDrawables(drawable,null,null,null);
}
}
。 LocalEventsAdapter ResourceNotFoundException只是Resources.getSystem().getString(event.name)个对象中的onBindViewHolder()个，因此我认为这不是问题所在。
localEvents我希望有一种与val类似的方法，可以“解码” Array变量的PlaceObject值并检索与之关联的class LocalEventsAdapter(private val localEvents : Array<PlaceObject>) :
RecyclerView.Adapter<LocalEventsAdapter.LocalEventHolder>() {
private val TAG:String = "LocalEventsAdapter"
// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder.
class LocalEventHolder(view:View) : RecyclerView.ViewHolder(view) {
private var v : View = view
var img : ImageView? = view.findViewById(R.id.localEventImg)
var txt : TextView? = view.findViewById(R.id.localEventTXV)
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): LocalEventHolder {
// Create a new view
val eventName = LayoutInflater.from(parent.context)
.inflate(R.layout.local_event_rcv_item,parent,false)
// set the view's size, margins, paddings and layout parameters
// ...
return LocalEventHolder(eventName)
}
override fun onBindViewHolder(holder: LocalEventHolder, pos: Int) {
// get element from your dataset at this position
// replace the contents of the view with that element
val event : PlaceObject = localEvents[pos]
val eventName : String = event.name.toString() //Resources.getSystem().getString(event.name)
holder.txt!!.text = eventName//TODO:sp Above commented line throws ResourceNotFoundException
holder.img?.setImageDrawable(determineImgRes(eventName,pos))
if(holder.img == null) Log.d(TAG,"Image is null")
}
private fun determineImgRes(name:String, pos : Int): Drawable? {
return when(name) {
"Test Name" -> R.drawable.miaoulia_event.toDrawable()
else -> R.drawable.local_events_placeholder.toDrawable() //TODO:sp Drawable isn't loading correctly, getting purple solid drawable instead
}
}
// Return the size of your dataset (invoked by the layout manager)
override fun getItemCount() = localEvents.size
}
，但是我似乎找不到合适的。我在这里想念什么？