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我在使用 Kumulos 填充 ListView 时遇到了很多困难。通过我的研究，我发现了许多关于使用 SQLite 或其他数据库的教程和帖子，但没有使用 Kumulos =/。

我需要帮助：

1）实现Kumulos填充ListView

来源：https ://docs.kumulos.com/integration/android/

进行的研究：

Android中base64字符串编码和解码位图对象

HashMap 到 ListView

如何通过多列ListView中的HashMap从DBHelper中检索数据

HashMap 到 ListView

主要活动：

public class PersonSearchPop extends Activity {

private ListView personlist;
private CustomListViewAdapter customListViewAdapter;
public static final String YOUR_API_KEY = "HIDDEN";
public static final String YOUR_SECRET_KEY = "HIDDEN";

public static String encodeToBase64(Bitmap image, Bitmap.CompressFormat compressFormat, int quality)
{
    ByteArrayOutputStream byteArrayOS = new ByteArrayOutputStream();
    image.compress(compressFormat, quality, byteArrayOS);
    return Base64.encodeToString(byteArrayOS.toByteArray(), Base64.DEFAULT);
}

public static Bitmap decodeBase64(String input)
{
    byte[] decodedBytes = Base64.decode(input, 0);
    return BitmapFactory.decodeByteArray(decodedBytes, 0, decodedBytes.length);
}


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.listview_popup);

    Kumulos.initWithAPIKeyAndSecretKey(YOUR_API_KEY, YOUR_SECRET_KEY, this);

    DisplayMetrics dm = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(dm);

    int width = dm.widthPixels;
    int height = dm.heightPixels;

    getWindow().setLayout((int) (width * .4), (int) (height * .6));

   ?????????????????????????????????????????????????????????????????????????????????


    personlist.setOnItemClickListener(new AdapterView.OnItemClickListener(){
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id){
            finish();
        }
    });
}

}

自定义适配器：

public class CustomListViewAdapter extends CursorAdapter {

public CustomListViewAdapter(Context context, Cursor c){
    super (context, c);
}

@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {

    LayoutInflater inflater = LayoutInflater.from(parent.getContext());
    View retView = inflater.inflate(R.layout.personlist_row, parent, false);
    return retView;
}

@Override
public void bindView(View view, Context context, Cursor cursor) {

    TextView dl = (TextView) view.findViewById(R.id.tvdl);
    dl.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(7))));

    TextView last = (TextView) view.findViewById(R.id.tvLastName);
    last.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(1))));

    TextView first = (TextView) view.findViewById(R.id.tvFirstName);
    first.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(3))));

    TextView middle = (TextView) view.findViewById(R.id.tvMiddleName);
    middle.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(2))));

    TextView ss = (TextView) view.findViewById(R.id.tvSS);
    ss.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(8))));

    //ImageView image = (ImageView) view.findViewById(R.id.idPic);
    //image.setImageDrawable(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(12))));
}

}

输入数据：

public class EnterData extends Activity {

EditText lName;
EditText dl;
EditText ss;

@Override
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.persons_popup);

    lName = (EditText) findViewById(R.id.etLastName);
    dl = (EditText) findViewById(R.id.etDL);
    ss = (EditText) findViewById(R.id.etSocial);
}

public void onClickSearch (View btnSearch) {

    String personName = lName.getText().toString();
    String personDL = dl.getText().toString();
    String personSS = ss.getText().toString();

    }
}

}

更新：好的，我将代码更改为只有两个类，它似乎正在工作。然而，我从 Kumulos 那里得到一个错误 =/。

Kumulos 错误：{"responseCode":32,"responseMessage":"无效请求：","payload":null,"sessionToken":"b29366e44a7cdbb905db18b51995e545daf4f816","re​​questedMethod":"searchPerson","re​​questedFormat":"json", "时间戳":1462147387,"requestReceivedTime":1462147387,"maxAllowedRequestTime":40,"requestProcessingTime":0.012163877487183}

人物搜索流行：

public class PersonSearchPop extends ListActivity {

public static final String YOUR_API_KEY = "HIDDEN";
public static final String YOUR_SECRET_KEY = "HIDDEN";

static class Person {

    public long personID;
    public String lastName;
    public String middleName;
    public String firstName;
    public String dateOfBirth;
    public String personAddress;
    public int phoneNumber;
    public int driversLicense;
    public int socialSecurity;
    public String personRace;
    public String personSex;
    public String personAge;

    public static Person createFromGenericMap(Map<String, Object> object) {

        Person p = new Person();

        p.personID = (long) object.get("personID");
        p.lastName = (String) object.get("lastName");
        p.middleName = (String) object.get("middleName");
        p.firstName = (String) object.get("firstName");
        p.dateOfBirth = (String) object.get("dob");
        p.personAddress = (String) object.get("address");
        p.phoneNumber = (int) object.get("phone");
        p.driversLicense = (int) object.get("dl");
        p.socialSecurity = (int) object.get("ss");
        p.personRace = (String) object.get("race");
        p.personSex = (String) object.get("sex");
        p.personAge = (String) object.get("age");

        return p;
    }

}

static class PersonAdapter extends BaseAdapter {

    private List<Person> people;

    public PersonAdapter(List<Person> people) {
        this.people = people;
        //inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }


    @Override
    public int getCount() {
        return people.size();
    }

    @Override
    public Object getItem(int position) {
        return people.get(position);
    }

    @Override
    public long getItemId(int position) {
        Person p = people.get(position);
        return p.personID;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        View view = convertView;

        if (convertView == null) {


            TextView dl = (TextView) view.findViewById(R.id.tvdl);
            TextView last = (TextView) view.findViewById(R.id.tvLastName);
            TextView first = (TextView) view.findViewById(R.id.tvFirstName);
            TextView middle = (TextView) view.findViewById(R.id.tvMiddleName);
            TextView ss = (TextView) view.findViewById(R.id.tvSS);

            Person mperson = people.get(position);

            dl.setText(mperson.driversLicense);
            last.setText(mperson.lastName);
            first.setText(mperson.firstName);
            middle.setText(mperson.middleName);
            ss.setText(mperson.socialSecurity);
            //ImageView image = (ImageView) view.findViewById(R.id.idPic);
            //image.setImageDrawable(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(12))));
        }
        return view;
    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.listview_popup);

    Kumulos.initWithAPIKeyAndSecretKey(YOUR_API_KEY, YOUR_SECRET_KEY, this);

    DisplayMetrics dm = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(dm);

    int width = dm.widthPixels;
    int height = dm.heightPixels;

    getWindow().setLayout((int) (width * .4), (int) (height * .6));

    // Call Kumulos
    Map<String, String> params = new HashMap<>();
    Intent intent = getIntent();
    String lastName = intent.getStringExtra("lastName");
    params.put("lastName",String.valueOf(lastName));
    Kumulos.call("searchPerson", params, new ResponseHandler() {

        // Handle result
        @Override
        public void didCompleteWithResult(Object result) {
            super.didCompleteWithResult(result);

            // Cast generic response down to list of maps
            ArrayList<LinkedHashMap<String, Object>> objects = (ArrayList<LinkedHashMap<String, Object>>) result;

            // Create a list for the models
            ArrayList<Person> people = new ArrayList<>();

            // Map models from generic objects and add to list
            for (Map<String, Object> personObject : objects) {
                Person p = Person.createFromGenericMap(personObject);
                people.add(p);
            }

            // Create adapter with model list
            final PersonAdapter adapter = new PersonAdapter(people);

            // Set adapter on main UI thread
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    setListAdapter(adapter);
                }
            });
        }
    });
}

}

人流行

 @Override
public void onClick(View v){
    switch(v.getId()){
        case R.id.bCancelPerson:
            finish();
            break;
        case R.id.bSearchPerson:
            EditText lastName = (EditText) findViewById(R.id.etLastName);
            Intent intent = new Intent(PersonsPop.this, PersonSearchPop.class);
            intent.putExtra("lastName", lastName.getText().toString());
            startActivity(new Intent(PersonsPop.this, PersonSearchPop.class));
4

1 回答 1

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我是来自 Kumulos 的 Chris——让我试着为你指出正确的方向。

所以一般来说，从 Web 服务的列表视图中显示数据的过程如下所示：

  1. 调用 Web 服务并检索数据列表

  2. 将这些对象映射到模型类并保存在内存中或持久保存到磁盘

  3. 创建一个由手机上的数据支持的适配器

  4. 将列表视图的适配器设置为您的自定义适配器实例

假设您将对象保存在内存中，创建一个由ArrayList您的模型类型支持的自定义适配器就足够了。这是最简单的入门方法之一。

因此，使用 Kumulos，您可以执行以下操作：

package com.example.cgwyllie.simplelistview;

import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;

import com.kumulos.android.jsonclient.Kumulos;
import com.kumulos.android.jsonclient.ResponseHandler;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

public class MainActivity extends ListActivity {

    static class Person {

        public long personID;
        public String firstName;
        public String lastName;

        public static Person createFromGenericMap(Map<String, Object> object) {
            Person p = new Person();

            p.personID = (long) object.get("personID");
            p.firstName = (String) object.get("firstName");
            p.lastName = (String) object.get("lastName");

            return p;
        }

    }

    static class PersonAdapter extends BaseAdapter {

        private List<Person> people;

        public PersonAdapter(List<Person> people) {
            this.people = people;
        }

        @Override
        public int getCount() {
            return people.size();
        }

        @Override
        public Object getItem(int position) {
            return people.get(position);
        }

        @Override
        public long getItemId(int position) {
            Person p = people.get(position);
            return p.personID;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            // TODO implement your view
            return null;
        }

    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Kumulos.initWithAPIKeyAndSecretKey("API_KEY", "SECRET_KEY", this);

        // Call Kumulos
        Map<String,String> params = new HashMap<>();
        Kumulos.call("getPeople", params, new ResponseHandler() {

            // Handle result
            @Override
            public void didCompleteWithResult(Object result) {
                super.didCompleteWithResult(result);

                // Cast generic response down to list of maps
                ArrayList<LinkedHashMap<String, Object>> objects = (ArrayList<LinkedHashMap<String,Object>>) result;

                // Create a list for the models
                ArrayList<Person> people = new ArrayList<>();

                // Map models from generic objects and add to list
                for (Map<String,Object> personObject : objects) {
                    Person p = Person.createFromGenericMap(personObject);
                    people.add(p);
                }

                // Create adapter with model list
                final PersonAdapter adapter = new PersonAdapter(people);

                // Set adapter on main UI thread
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        setListAdapter(adapter);
                    }
                });
            }
        });
    }
}

如前所述，虽然这是最简单的方法之一，但它在处理方向变化或在加载时远离活动的导航方面确实存在一些限制。也没有涉及使用回收实现视图。

有关更全面的列表视图示例，可能值得查看http://developer.android.com/training/material/lists-cards.html和http://www.vogella.com/tutorials/AndroidListView/article.html .

希望这很有用。

于 2016-04-28T13:27:42.467 回答