java - Intent 的 RecyclerView 中未检测到 OnClick

Question

我对我正在处理的应用程序的 RecyclerView 之一的 onClick 方法有疑问。奇怪的是，完全相同的逻辑适用于我的应用程序中的其他 recyclerviews，但这次的不同之处在于我正在解析 JSON 数据(这是我认为我遗漏了一些东西)。在模拟器或我的手机上根本没有检测到 onClick，甚至没有在 log cat 中记录任何内容(我使用的是 Android Studio 1.3.1)，所以我完全感到困惑!我相信我在我的 Android list 文件(您将在下面找到)中定义了所有适当的权限和 Intent 过滤器。

这是我想从中触发 Intent 的回收器 View (intent = new Intent(context, AdminTeam.class); 未检测到此 OnClick - 它仅显示带有项目的回收器 View ，然后让我单击在每一行上，但没有任何反应!:

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);
    }
}

国家委员会.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) {

    }
}

这是我想从中触发 Intent 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);
    }
    */


}

在这个类中，我正在做我的 JSON 解析，这是我希望从 RecyclerViewNationalCommittee.java 文件中的 onClick 中获取的类:

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();
        }
    }
}

这是我的 JSONAdminItem 类文件:

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;
    }
}

这是我的 AndroidManifest.xml 文件，我在其中添加了相关权限，还添加了所见的 Activity :

AndroidManifest.xml

<?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>

我不明白为什么没有检测到 RecylerViewAdapterNationalCommiitee.java 中的 onClick。

这很奇怪，因为这个 Intent 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>

而这不是:

             <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>

任何指导将不胜感激。

谢谢!

Answer 1

您永远不会在列表项上设置任何点击监听器。在 onBindViewHolder 中的每个列表项上设置点击监听器将解决问题:

holder.itemView.setOnClickListener(...