Question

我在活动中有一个可点击的列表视图。我想要的是当我从列表中单击时，它将转到片段。有谁知道它是如何完成的？

此外，如果用户点击列表时会有一种方式，它会打开一个新活动。

编辑：这是我的代码。

        Activity_list.java

        package com.example.beminix.dcar;


        import android.content.Intent;
        import android.support.v4.app.Fragment;
        import android.support.v4.app.FragmentTransaction;
        import android.support.v7.app.AppCompatActivity;
        import android.os.Bundle;
        import android.view.MenuItem;
        import android.view.View;
        import android.widget.AdapterView;
        import android.widget.ListView;
        import android.widget.SearchView;
        import android.widget.TextView;
        import android.widget.Toast;

        import java.util.ArrayList;

        public class Activity_list extends AppCompatActivity implements AdapterView.OnItemClickListener{
            EstablishmentAdapter adapter = null;
            ArrayList<Establishments> establishments = null;
            ListView myEstListView;
            SearchView mySearchView = null ;
            @Override
            protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_list);

                establishments = new ArrayList<>();
                establishments = populateEstablishmentsData(establishments);
                mySearchView = (SearchView) findViewById( R.id.mySearchView ) ;
                myEstListView = (ListView) findViewById(R.id.myEstListView);
                adapter = new EstablishmentAdapter(this, establishments);
                myEstListView.setAdapter(adapter);

                mySearchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
                    @Override
                    public boolean onQueryTextSubmit(String s) {
                        return false;
                    }

                    @Override
                    public boolean onQueryTextChange(String s) {
                        // Here implement search logic
                        adapter.getFilter().filter(s);
                        adapter.notifyDataSetChanged();
                        return false;
                    }
                });

                if(getSupportActionBar() != null)
                {
                    getSupportActionBar().setDisplayShowHomeEnabled(true);
                    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
                }
                ListView your_list_view = (ListView) findViewById(R.id.myEstListView);

            }

            private ArrayList<Establishments> populateEstablishmentsData(ArrayList<Establishments> establishments) {
                establishments.add(new Establishments("Art Gallery", 1, R.drawable.art_gallery_icon));
                establishments.add(new Establishments("ATM", 2, R.drawable.atm_icon));
                establishments.add(new Establishments("Bakery", 3, R.drawable.bakery_icon));
                establishments.add(new Establishments("Bank",4, R.drawable.bank_icon));
                establishments.add(new Establishments("Bar",5, R.drawable.bar_icon));
                establishments.add(new Establishments("Book Store",6, R.drawable.book_store_icon));
                establishments.add(new Establishments("Bus Station/Bus Terminal",7, R.drawable.bus_terminal_icon));
                establishments.add(new Establishments("Cafe",8, R.drawable.cafe_icon));
                establishments.add(new Establishments("Car Services",9, R.drawable.car_services_icon));
                establishments.add(new Establishments("Car Retail Store",10, R.drawable.car_services_icon));
                establishments.add(new Establishments("Cemetery",11, R.drawable.cemetery_icon));
                establishments.add(new Establishments("Department Store",12, R.drawable.department_store_icon));
                establishments.add(new Establishments("Electronics Store",13, R.drawable.electronic_store_icon));
                establishments.add(new Establishments("Fast Food Chain",14, R.drawable.fast_food_icon));
                establishments.add(new Establishments("Fire Station",15, R.drawable.fire_station_icon));
                establishments.add(new Establishments("Flower Shop",16, R.drawable.flowershop_icon));
                establishments.add(new Establishments("Gas Station",17, R.drawable.gas_station_icon));
                establishments.add(new Establishments("Government Office",18, R.drawable.gov_office_icon));
                establishments.add(new Establishments("Gym",19, R.drawable.gym_icon));
                establishments.add(new Establishments("Hospital",20, R.drawable.hospital_icon));
                establishments.add(new Establishments("Hotel",21, R.drawable.hotel_icon));
                establishments.add(new Establishments("Ice Cream Shop",22, R.drawable.ice_cream_icon));
                establishments.add(new Establishments("Insurance Agency",23, R.drawable.insurance_icon));
                establishments.add(new Establishments("Jewelry Store",24, R.drawable.jewelry_icon));
                establishments.add(new Establishments("Laundry Shop Services",25, R.drawable.laundry_icon));
                establishments.add(new Establishments("Library",26, R.drawable.library_icon));
                establishments.add(new Establishments("Museum",27, R.drawable.museum_icon));
                establishments.add(new Establishments("Park",28, R.drawable.park_icon));
                establishments.add(new Establishments("Pet Store",29, R.drawable.pet_store_icon));
                establishments.add(new Establishments("Pharmacy",30, R.drawable.pharmacy_icon));
                establishments.add(new Establishments("Place of Worship",31, R.drawable.place_of_worship_icon));
                establishments.add(new Establishments("Police Station",32, R.drawable.police_station_icon));
                establishments.add(new Establishments("Restaurant",33, R.drawable.restaurant_icon));
                establishments.add(new Establishments("School",34, R.drawable.school_icon));
                establishments.add(new Establishments("Shoes Store",35, R.drawable.shoe_store_icon));
                establishments.add(new Establishments("Shopping Mall",36, R.drawable.shopping_mall_icon));
                establishments.add(new Establishments("Spa",10, R.drawable.spa_icon));
                establishments.add(new Establishments("Travel Agency",37, R.drawable.travel_service_icon));
                establishments.add(new Establishments("Zoo",38, R.drawable.zoo_icon));
                return establishments;
            }

            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
                Establishments c = adapter.getItem(position);
                Toast.makeText(Activity_list.this, " " + c.geteName() , Toast.LENGTH_SHORT).show();

               //startActivity(new Intent(this, establishments[position].activityClass));
               // Intent intent = new Intent(this, SecondFragment.class);
                //startActivity(intent);

               // android.app.FragmentManager fragmentManager = getFragmentManager();

            @Override
            public boolean onOptionsItemSelected(MenuItem item) {
                int id = item.getItemId();
                if(item.getItemId()==android.R.id.home)
                    finish();
                return super.onOptionsItemSelected(item);

            }

            private AdapterView.OnItemClickListener mDeviceClickListener = new AdapterView.OnItemClickListener() {
                @SuppressWarnings("unchecked")

                public void onItemClick(AdapterView<?> av, View v, int arg2, long arg3) {
                    String info = ((TextView) v).getText().toString(); //text of position selected
                }



            };

        }

    EstablishmentAdapter.java


    import android.content.Context;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.ArrayAdapter;
    import android.widget.Filter;
    import android.widget.ImageView;
    import android.widget.TextView;
    import android.widget.Toast;

    import java.util.ArrayList;


    public class EstablishmentAdapter extends ArrayAdapter<Establishments> {
        ArrayList<Establishments> establishments, tempEstablishment, suggestions;

        public EstablishmentAdapter(Context context, ArrayList<Establishments> objects) {
            super(context, R.layout.customer_row, R.id.tvCustomer, objects);
            this.establishments = objects;
            this.tempEstablishment = new ArrayList<Establishments>(objects);
            this.suggestions = new ArrayList<Establishments>(objects);

        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            return initView(position, convertView, parent);
        }


        private View initView(int position, View convertView, ViewGroup parent) {
            Establishments establish = getItem(position);
            if (convertView == null) {
                if (parent == null)
                    convertView = LayoutInflater.from(getContext()).inflate(R.layout.customer_row, null);
                else
                    convertView = LayoutInflater.from(getContext()).inflate(R.layout.customer_row, parent, false);
            }
            TextView txtCustomer = (TextView) convertView.findViewById(R.id.tvCustomer);
            ImageView ivCustomerImage = (ImageView) convertView.findViewById(R.id.ivCustomerImage);
            if (txtCustomer != null)
                txtCustomer.setText(establish.geteName() + " " );


            if (ivCustomerImage != null)
                ivCustomerImage.setImageResource(establish.getEstPhoto());


            return convertView;
        }

        @Override
        public Filter getFilter() {
            return myFilter;
        }
        Filter myFilter =new Filter() {
            @Override
            public CharSequence convertResultToString(Object resultValue) {
                Establishments customer =(Establishments)resultValue ;
                return customer.geteName() + " ";
            }

            @Override
            protected FilterResults performFiltering(CharSequence constraint) {
                if (constraint != null) {
                    suggestions.clear();
                    for (Establishments cust : tempEstablishment) {
                        if (cust.geteName().toLowerCase().startsWith(constraint.toString().toLowerCase())) {
                            suggestions.add(cust);
                        }
                    }

                    FilterResults filterResults = new FilterResults();
                    filterResults.values = suggestions;
                    filterResults.count = suggestions.size();
                    return filterResults;
                } else {
                    return new FilterResults();
                }
            }

            @Override
            protected void publishResults(CharSequence constraint, FilterResults results) {
                ArrayList<Establishments> c =  (ArrayList<Establishments> )results.values ;
                if (results != null && results.count > 0) {
                    clear();
                    for (Establishments cust : c) {
                        add(cust);
                        notifyDataSetChanged();
                    }
                }
                else{
                    clear();
                    notifyDataSetChanged();
                }
            }
        };
    }

Establishments.java

    package com.example.beminix.dcar;

/**
 * Created by Beminix on 09/02/2017.
 */



public class Establishments {
    private String estName = "";
    private int id = 0;
    private int estPhoto = -1;

    public Establishments(String ename, int id, int pic) {
        this.estName = ename;
        this.id = id;
        this.estPhoto = pic;

    }

    public String geteName() {
        return estName;
    }

    public void seteName(String esName) {
        this.estName = esName;
    }


    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public int getEstPhoto() {
        return estPhoto;
    }

    public void setEstPhoto(int estPhoto) {
        this.estPhoto = estPhoto;
    }

    @Override
    public String toString() {
        return this.estName + " ";
    }
}

搜索视图和列表视图显示并且可以单击。但我不知道用户何时从列表中点击并加载到片段或活动。：（

Answer 1

首先，您需要在代码中为ListView定义clickListener：

    [your_list_view].setOnItemClickListener(mDeviceClickListener);

然后定义方法：

private AdapterView.OnItemClickListener mDeviceClickListener = new AdapterView.OnItemClickListener() {
@SuppressWarnings("unchecked")
public void onItemClick(AdapterView<?> av, View v, int arg2, long arg3) {
    String info = ((TextView) v).getText().toString(); //text of position selected
} };

在您的activity_main.xml中，您需要创建一个FrameLayout，以便加载Fragment：

    <FrameLayout
    android:id="@+id/content_frame"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

在为ListView创建的方法中，您需要像下面这样夸大Fragment：

Fragment newFragment = new YourFragmentClass();
FragmentTransaction transaction = this.getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.content_frame, newFragment);
transaction.addToBackStack(null);
transaction.commit();

请注意“YouFragmentClass（）”是处理Fragment时的类，这个类是这样的：

public class FragmentMain extends Fragment {

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    //returning our layout file
    //change R.layout.yourlayoutfilename for each of your fragments
    final View view = inflater.inflate(R.layout.yourlayoutfilename, container, false);


    return view;
}

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    //you can set the title for your toolbar here for different fragments different titles
    getActivity().setTitle("Main");


}
}

如果您想更改活动，只需将此代码放在ListView的onClickListener中：

startActivity(new Intent(CurrentActivity.this,DestinationActivity.class));

希望有所帮助：）

编辑：我设法改变活动和片段OnItemClick，该类应该如下所示：

import android.content.Intent;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.SearchView;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;

public class Activity_list extends AppCompatActivity implements   AdapterView.OnItemClickListener{
EstablishmentAdapter adapter = null;
ArrayList<Establishments> establishments = null;
ListView myEstListView;
SearchView mySearchView = null ;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    establishments = new ArrayList<>();
    establishments = populateEstablishmentsData(establishments);
    mySearchView = (SearchView) findViewById(R.id.mySearchView ) ;
    myEstListView = (ListView) findViewById(R.id.myEstListView);
    adapter = new EstablishmentAdapter(this, establishments);
    myEstListView.setAdapter(adapter);

    myEstListView.setOnItemClickListener(mDeviceClickListener);

    mySearchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String s) {
            return false;
        }
        @Override
        public boolean onQueryTextChange(String s) {
            adapter.getFilter().filter(s);
            adapter.notifyDataSetChanged();
            return false;
        }
    });

    if(getSupportActionBar() != null)
    {
        getSupportActionBar().setDisplayShowHomeEnabled(true);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    }
}

private ArrayList<Establishments> populateEstablishmentsData(ArrayList<Establishments> establishments) {
    establishments.add(new Establishments("Art Gallery", 1, R.drawable.art_gallery_icon));
    establishments.add(new Establishments("ATM", 2, R.drawable.atm_icon));
    establishments.add(new Establishments("Bakery", 3, R.drawable.bakery_icon));
    establishments.add(new Establishments("Bank",4, R.drawable.bank_icon));
    establishments.add(new Establishments("Bar",5, R.drawable.bar_icon));
    establishments.add(new Establishments("Book Store",6, R.drawable.book_store_icon));
    establishments.add(new Establishments("Bus Station/Bus Terminal",7, R.drawable.bus_terminal_icon));
    establishments.add(new Establishments("Cafe",8, R.drawable.cafe_icon));
    establishments.add(new Establishments("Car Services",9, R.drawable.car_services_icon));
    establishments.add(new Establishments("Car Retail Store",10, R.drawable.car_services_icon));
    establishments.add(new Establishments("Cemetery",11, R.drawable.cemetery_icon));
    establishments.add(new Establishments("Department Store",12, R.drawable.department_store_icon));
    establishments.add(new Establishments("Electronics Store",13, R.drawable.electronic_store_icon));
    establishments.add(new Establishments("Fast Food Chain",14, R.drawable.fast_food_icon));
    establishments.add(new Establishments("Fire Station",15, R.drawable.fire_station_icon));
    establishments.add(new Establishments("Flower Shop",16, R.drawable.flowershop_icon));
    establishments.add(new Establishments("Gas Station",17, R.drawable.gas_station_icon));
    establishments.add(new Establishments("Government Office",18, R.drawable.gov_office_icon));
    establishments.add(new Establishments("Gym",19, R.drawable.gym_icon));
    establishments.add(new Establishments("Hospital",20, R.drawable.hospital_icon));
    establishments.add(new Establishments("Hotel",21, R.drawable.hotel_icon));
    establishments.add(new Establishments("Ice Cream Shop",22, R.drawable.ice_cream_icon));
    establishments.add(new Establishments("Insurance Agency",23, R.drawable.insurance_icon));
    establishments.add(new Establishments("Jewelry Store",24, R.drawable.jewelry_icon));
    establishments.add(new Establishments("Laundry Shop Services",25, R.drawable.laundry_icon));
    establishments.add(new Establishments("Library",26, R.drawable.library_icon));
    establishments.add(new Establishments("Museum",27, R.drawable.museum_icon));
    establishments.add(new Establishments("Park",28, R.drawable.park_icon));
    establishments.add(new Establishments("Pet Store",29, R.drawable.pet_store_icon));
    establishments.add(new Establishments("Pharmacy",30, R.drawable.pharmacy_icon));
    establishments.add(new Establishments("Place of Worship",31, R.drawable.place_of_worship_icon));
    establishments.add(new Establishments("Police Station",32, R.drawable.police_station_icon));
    establishments.add(new Establishments("Restaurant",33, R.drawable.restaurant_icon));
    establishments.add(new Establishments("School",34, R.drawable.school_icon));
    establishments.add(new Establishments("Shoes Store",35, R.drawable.shoe_store_icon));
    establishments.add(new Establishments("Shopping Mall",36, R.drawable.shopping_mall_icon));
    establishments.add(new Establishments("Spa",10, R.drawable.spa_icon));
    establishments.add(new Establishments("Travel Agency",37, R.drawable.travel_service_icon));
    establishments.add(new Establishments("Zoo",38, R.drawable.zoo_icon));
    return establishments;
}

@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
    Establishments c = adapter.getItem(position);
    Toast.makeText(Activity_list.this, " " + c.geteName() , Toast.LENGTH_SHORT).show();

    //for some reason, it never enters this method when onItemClick :c

    //startActivity(new Intent(this, establishments[position].activityClass));
    // Intent intent = new Intent(this, SecondFragment.class);
    //startActivity(intent);

    // android.app.FragmentManager fragmentManager = getFragmentManager();
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();
    if(item.getItemId()==android.R.id.home)
        finish();
    return super.onOptionsItemSelected(item);

}
private void loadFragment(){
    Fragment fragment = new SecondFragment();

    if (fragment != null) {
        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
        ft.replace(R.id.content_frame, fragment);
        ft.commit();
    }
}
private void changeActivity(){
    startActivity(new Intent(this,SecondActivity.class));
}
private AdapterView.OnItemClickListener mDeviceClickListener = new AdapterView.OnItemClickListener() {
    @SuppressWarnings("unchecked")
    public void onItemClick(AdapterView<?> av, View v, int arg2, long arg3) {
        Establishments c = adapter.getItem(arg2);
        Toast.makeText(Activity_list.this, " " + c.geteName() , Toast.LENGTH_SHORT).show();

        //you decide if you want to change activity
        changeActivity();

        //or load a fragment
        loadFragment();

    }
};
}

试一试：）

片段活动中的Listview

1 个答案: