[英]OnClick not being detected in RecyclerView for Intent
我正在為一個正在使用的應用程序的RecyclerView之一使用onClick方法時遇到問題。 奇怪的是,完全相同的邏輯可與我的應用程序中的其他recyclerviews一起使用,但是這次的區別是我正在解析JSON數據(這是我認為丟失了某些東西的地方)。 在模擬器或手機上根本沒有檢測到onClick,甚至在登錄目錄中也沒有任何記錄(我使用的是Android Studio 1.3.1),所以我完全感到困惑! 我相信我在Android清單文件(您將在下面找到)中定義了所有適當的權限和意圖過濾器。
這是我要從中觸發意圖的回收者視圖(intent = new Intent(context,AdminTeam.class);這個OnClick未被檢測到-它僅顯示帶有項目的回收者視圖,然后讓我單擊每一行但是什么也沒發生!
RecyclerViewAdapterNationalCommiitee.java
public class RecyclerViewAdapterNationalCommiitee extends RecyclerView.Adapter<RecyclerViewAdapterNationalCommiitee.MyViewHolder> {
private Context context;
private LayoutInflater inflater;
//private RecyclerViewAdapterAdminTeam ra;
//Variable for the on click Listener
private ClickListener clickListener;
List<SubInformation> data = Collections.emptyList();
//Passing in the array list argument
public RecyclerViewAdapterNationalCommiitee(Context context, List<SubInformation> data) {
this.context = context;
inflater = LayoutInflater.from(context);
//Setting the array list data to the argument passed in
this.data = data;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
//Inflating the row and getting the root of view of the custom row natcom (Linear Layout)
View view = inflater.inflate(R.layout.custom_row_natcom, parent, false);
//Passing the root view through as an argument
MyViewHolder holder = new MyViewHolder(view);
//Returning the view holder
return holder;
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
//This will get the current position of the Information object from the Information array
SubInformation current = data.get(position);
holder.title.setText(current.getTitle());
}
//Setting up a click listener which lets me set up an object that implements the interface
public void setClickListener(ClickListener clickListener) {
//Initialising the clickListener
this.clickListener = clickListener;
}
@Override
public int getItemCount() {
return data.size();
}
class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView title;
public MyViewHolder(View itemView) {
super(itemView);
//Here setting the id of the textview in the recycler view holder to be the list view from the custom_row xml
title = (TextView) itemView.
findViewById(R.id.listText);
}
@Override
public void onClick(View v) {
Intent intent = null;
switch (getAdapterPosition()) {
case 0:
//Toast.makeText(v.getContext(), "Default Case", Toast.LENGTH_SHORT).show();
//break;
intent = new Intent(context, AdminTeam.class);
//intent.putExtra("JSON Admin", ra.getItemCount());
break;
case 1:
Toast.makeText(v.getContext(), "Default Case", Toast.LENGTH_SHORT).show();
break;
default:
break;
}
//In order for an activity to begin, a context needs to be passed in
//context.startActivity(new Intent(context, Introduction.class));
context.startActivity(intent);
//If the method is not called (Error handling to avoid NULL POINTER EXCEPTION ERROR)
if (clickListener != null) {
//Trigger the appropriate call. getPosition will get the latest position of the item clicked by the user
clickListener.itemClicked(v, getAdapterPosition());
}
}
}
//Here, inside the adapter have made an interface. This interface is implemented in the Tab1 class Fragment.
public interface ClickListener {
void itemClicked(View view, int position);
}
}
NationalCommittee.java
public class NationalCommittee extends BaseActivity implements RecyclerViewAdapterNationalCommiitee.ClickListener {
private RecyclerView mRecyclerView;
//Creating an instance of the adapter object
private RecyclerViewAdapterNationalCommiitee adapter;
private static final int ITEM_COUNT = 2;
@Override
//public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.national_committee);
//final View layout = inflater.inflate(R.layout.national_committee, container, false);
//Calling Activate Toolbar method (with the Back button enabled)
activateToolbarWithHomeEnabled();
//Instantiating the recycler view as defined in national_committee
mRecyclerView=(RecyclerView) findViewById(R.id.natcom_recycler_view);
//Adding item decoration. Recycler view divider
mRecyclerView.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL_LIST));
//Initialising the adapter - Passing in the activity and the getData method
adapter=new RecyclerViewAdapterNationalCommiitee(this,getData());
//Here passing in the click listener into the Adapter. 'this' signifies that it is the fragment that handles the click listener.
//This is possible as the on Click Listener interface is being implemented.
adapter.setClickListener(this);
//Setting the adapter
mRecyclerView.setAdapter(adapter);
//Setting the Layout
//mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
//return layout;
}
//Creating an array list of information objects that can be passed into the recycler view
public static List<SubInformation> getData() {
List<SubInformation> data = new ArrayList<>();
//String array of text for the recycler view
String[] text = {"Admin Team", "Team Coordinators"};
//String[] subText = {"What is NHSF?", "Admin Team and Team Coordinators"};
//For loop to go through entire length of the menu string
//for(int i=0; i<menu.length; i++) {
for(int i=0; i<ITEM_COUNT; i++){
//Information current = new Information();
//Information subCurrent = new Information();
//current.title = text[i];
//subCurrent.subtitle = subText[i];
data.add(new SubInformation(text[i]));
}
return data;
}
@Override
public void itemClicked(View view, int position) {
}
}
這是我要從中觸發意圖的RecyclerView:
RecyclerViewAdapterAdminTeam.java
public class RecyclerViewAdapterAdminTeam extends RecyclerView.Adapter<RecyclerViewAdapterAdminTeam.MyViewHolder> {
private LayoutInflater inflater;
private AdminTeam activity;
//Variable for the on click Listener
//private ClickListener clickListener;
private List<JSONAdminItem> data = Collections.emptyList();
private Context mContext;
//Passing in the array list argument
public RecyclerViewAdapterAdminTeam(AdminTeam activity, Context context, List<JSONAdminItem> data){
this.mContext = context;
this.activity = activity;
inflater = LayoutInflater.from(context);
//Setting the array list data to the argument passed in
this.data = data;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
//Inflating the row and getting the root of view of the custom row natcom (Linear Layout)
View view = inflater.inflate(R.layout.custom_row, parent, false);
//Passing the root view through as an argument
MyViewHolder holder = new MyViewHolder(view);
//Returning the view holder
return holder;
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
//This will get the current position of the JSONAdminItem object from the array
JSONAdminItem adminItem = data.get(position);
//Setting the title to be the Admin Role (converting from JSON)
holder.title.setText(Html.fromHtml(adminItem.getAdminRole()));
//Setting the subtitle to be the Name (converting from JSON)
holder.subTitle.setText(Html.fromHtml(adminItem.getName()));
}
/*
//Setting up a click listener which lets me set up an object that implements the interface
public void setClickListener(ClickListener clickListener){
//Initialising the clickListener
this.clickListener=clickListener;
}
*/
@Override
public int getItemCount() {
return data.size();
//return (null != data ? data.size() : 0);
}
public interface ClickListener {
}
class MyViewHolder extends RecyclerView.ViewHolder {
TextView title;
TextView subTitle;
public MyViewHolder(View itemView) {
super(itemView);
//Here setting the id of the textview in the recycler view holder to be the list view from the custom_row xml
title = (TextView) itemView.
findViewById(R.id.listText);
subTitle = (TextView) itemView.findViewById(R.id.subTitle);
}
/*
@Override
public void onClick(View v) {
}
*/
}
/*
//Here, inside the adapter have made an interface. This interface is implemented in the Tab1 class Fragment.
public interface ClickListener {
void itemClicked(View view, int position);
}
*/
}
在該類中,我正在執行JSON解析,這是我希望從RecyclerViewNationalCommittee.java文件中的onClick意圖獲得的類:
AdminTeam.java
public class AdminTeam extends BaseActivity implements RecyclerViewAdapterAdminTeam.ClickListener{
private RecyclerView mRecyclerView;
//Creating an instance of the adapter object
private RecyclerViewAdapterAdminTeam adapter;
private List<JSONAdminItem> AdminTeamList;
private AdminTeam activity;
//private static final int ITEM_COUNT = 5;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.admin_team);
//Calling Activate Toolbar method (with the Back button enabled)
activateToolbarWithHomeEnabled();
//Instantiating the recycler view as defined in admin_team
mRecyclerView = (RecyclerView) findViewById(R.id.adminteam_recycler_view);
//Adding item decoration. Recycler view divider
mRecyclerView.addItemDecoration(new DividerItemDecoration(this, DividerItemDecoration.VERTICAL_LIST));
//Initialising the adapter - Passing in the activity and the parsed Admin Team List
adapter = new RecyclerViewAdapterAdminTeam(activity, this, AdminTeamList);
//Setting the adapter
mRecyclerView.setAdapter(adapter);
//Setting the Layout
//mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
//Downloading data from below url (Universal Resource Locator) to obtain data from the Admin database
final String url = "http://dbchudasama.webfactional.com/jsonscriptAdmin.php";
new AsyncHTTPTask().execute(url);
}
public class AsyncHTTPTask extends AsyncTask<String, Void, Integer> {
@Override
protected Integer doInBackground(String... params) {
Integer result = 0;
HttpURLConnection urlConnection;
try {
URL url = new URL(params[0]);
urlConnection = (HttpURLConnection) url.openConnection();
int statusCode = urlConnection.getResponseCode();
// 200 represents HTTP OK
if (statusCode == 200) {
BufferedReader r = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
StringBuilder response = new StringBuilder();
String line;
while ((line = r.readLine()) != null) {
response.append(line);
}
parseResult(response.toString());
result = 1; // Successful
} else {
result = 0; //"Failed to fetch data!";
}
} catch (Exception e) {
Log.d("Exception Caught", e.getLocalizedMessage());
}
return result; //"Failed to fetch data!";
}
@Override
protected void onPostExecute(Integer result) {
super.onPostExecute(result);
//adapter.getItemCount();
if (result == 1) {
//Intent intent = getIntent();
//intent.getSerializableExtra("JSON Admin");
//Initialising the adapter - Passing in the activity and the parsed Admin Team List
adapter = new RecyclerViewAdapterAdminTeam(activity, AdminTeam.this, AdminTeamList);
//Setting the adapter
mRecyclerView.setAdapter(adapter);
} else {
Toast.makeText(AdminTeam.this, "Failed to fetch data!", Toast.LENGTH_SHORT).show();
}
}
}
//This method will parse the RAW data downloaded from the server
private void parseResult(String result) {
try {
//Converting into a JSON Object
JSONObject response = new JSONObject(result);
//Now converting this JSON Object into and a JSON Array
JSONArray AdminArrays = response.getJSONArray("Admin Arrays");
AdminTeamList = new ArrayList<>();
//String[] AdminRole = {};
for (int i = 0; i < AdminArrays.length(); i++) {
JSONObject AdminArrayObject = AdminArrays.getJSONObject(i);
JSONAdminItem item = new JSONAdminItem();
item.setAdminRole(AdminArrayObject.getString("AdminRole"));
item.setName(AdminArrayObject.getString("Name"));
this.AdminTeamList.add(item);
Log.e("Admin Role", AdminArrayObject.getString("AdminRole"));
Log.e("Name", AdminArrayObject.getString("Name"));
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
這是我的JSONAdminItem類文件:
JSONAdminItem.java
public class JSONAdminItem {
private String AdminRole;
private String Name;
public String getAdminRole(){
return AdminRole;
}
public void setAdminRole(String AdminRole) {
this.AdminRole = AdminRole;
}
public String getName(){
return Name;
}
public void setName(String Name) {
this.Name = Name;
}
}
這是我的AndroidManifest.xml文件,在其中添加了相關權限,還添加了活動,如下所示:
AndroidManifest.xml中
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.divyeshbc.NHSF" >
<!-- Parse settings -->
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<permission
android:name="com.divyeshbc.NHSF.permission.C2D_MESSAGE"
android:protectionLevel="signature" />
<uses-permission android:name="com.divyeshbc.NHSF.permission.C2D_MESSAGE" />
<!-- -->
<application
android:name=".ParseApplication"
android:allowBackup="true"
android:icon="@mipmap/nhsf_app_logo_androidx144"
android:label="@string/app_name"
android:theme="@style/Theme.Custom" >
<activity
android:name=".SplashActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:label="@string/app_name">
<!--android:parentActivityName=".SplashActivity">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.divyeshbc.NHSF.SplashActivity" />
-->
<intent-filter>
<action android:name="android.intent.action.MAINACTIVITY" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".tabs.aboutUs.Introduction"
android:label="@string/Introduction"
android:parentActivityName=".MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.divyeshbc.NHSF.MainActivity" />
<intent-filter>
<action android:name="android.intent.action.ACTION_VIEW" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".tabs.aboutUs.NationalCommittee"
android:label="@string/title_activity_natcom"
android:parentActivityName=".MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.divyeshbc.NHSF.MainActivity" />
</activity>
<activity
android:name=".tabs.aboutUs.AdminTeam"
android:label="@string/title_activity_adminteam"
android:parentActivityName=".tabs.aboutUs.NationalCommittee" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.divyeshbc.NHSF.tabs.aboutUs.NationalCommittee" />
</activity>
<!-- Configuring Parse -->
<service android:name="com.parse.PushService" />
<receiver android:name="com.parse.ParseBroadcastReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.USER_PRESENT" />
</intent-filter>
</receiver>
<receiver
android:name="com.parse.ParsePushBroadcastReceiver"
android:exported="false" >
<intent-filter>
<action android:name="com.parse.push.intent.RECEIVE" />
<action android:name="com.parse.push.intent.DELETE" />
<action android:name="com.parse.push.intent.OPEN" />
</intent-filter>
</receiver>
<receiver
android:name="com.parse.GcmBroadcastReceiver"
android:permission="com.google.android.c2dm.permission.SEND" >
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<action android:name="com.google.android.c2dm.intent.REGISTRATION" />
<category android:name="com.divyeshbc.NHSF" />
</intent-filter>
</receiver>
<!-- -->
<meta-data
android:name="com.divyeshbc.NHSF.notifcation_icon"
android:resource="@mipmap/nhsf_logo_push_android" />
</application>
</manifest>
我不明白為什么未檢測到RecylerViewAdapterNationalCommiitee.java中的onClick。
奇怪,因為此意圖有效:
<activity
android:name=".tabs.aboutUs.NationalCommittee"
android:label="@string/title_activity_natcom"
android:parentActivityName=".MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.divyeshbc.NHSF.MainActivity" />
</activity>
而這不是:
<activity
android:name=".tabs.aboutUs.AdminTeam"
android:label="@string/title_activity_adminteam"
android:parentActivityName=".tabs.aboutUs.NationalCommittee" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.divyeshbc.NHSF.tabs.aboutUs.NationalCommittee" />
</activity>
任何指導將不勝感激。
謝謝!
您永遠不會在列表項上設置任何點擊偵聽器。 在onBindViewHolder
每個列表項上設置點擊偵聽onBindViewHolder
將解決此問題:
holder.itemView.setOnClickListener(...
這是您可以嘗試的另一種方法。 您可以添加clicklistener
在rootView onBindViewHolder
。 這里修改了應該起作用的適配器代碼:
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
//This will get the current position of the Information object from the Information array
SubInformation current = data.get(position);
holder.title.setText(current.getTitle());
//add the click listener
holder.root.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = null;
switch (getAdapterPosition()) {
case 0:
//Toast.makeText(v.getContext(), "Default Case", Toast.LENGTH_SHORT).show();
//break;
intent = new Intent(context, AdminTeam.class);
//intent.putExtra("JSON Admin", ra.getItemCount());
break;
case 1:
Toast.makeText(v.getContext(), "Default Case", Toast.LENGTH_SHORT).show();
break;
default:
break;
}
//In order for an activity to begin, a context needs to be passed in
//context.startActivity(new Intent(context, Introduction.class));
context.startActivity(intent);
//If the method is not called (Error handling to avoid NULL POINTER EXCEPTION ERROR)
if (clickListener != null) {
//Trigger the appropriate call. getPosition will get the latest position of the item clicked by the user
clickListener.itemClicked(v, getAdapterPosition());
}
}
});
}
class MyViewHolder extends RecyclerView.ViewHolder{
TextView title;
View root; //save the root view and add the click listener on it in OnBindViewHolder
public MyViewHolder(View itemView) {
super(itemView);
root = itemView;
//Here setting the id of the textview in the recycler view holder to be the list view from the custom_row xml
title = (TextView) itemView.
findViewById(R.id.listText);
}
}
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