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我的主要activity有多个ArrayListsand Arrays。当您单击 Smoked Cigarette 按钮时，应用程序会将某些信息记录在ArrayList. 其中一个ArrayLists位置Smoked 包含您吸烟的所有位置。我的任务是制作一个activity显示在ListView您吸烟的位置，以及您在那里吸烟的次数。如果您显示array当前的位置Smoked，它将如下所示

家
家
家
工作
工作
学校
学校

等等等等。我需要循环array显示每个string被调用的次数并给出integer值。然后我需要将integer与匹配的 结合起来string。在并行array或多维array中显示该列表视图中另一个activity名为 Locations的信息activity所以它看起来像这样

家庭：3
工作：2
学校：2

应该注意的是，即使您永远不应该对元素进行硬编码，但在这种情况下，我实际上是不允许这样做的，因为ArrayList位置将不断增长。activity我已经完成了另一个允许用户将新位置添加到现有ArrayList 位置的方法。但是，listview当我转到activity.

因此，如果这令人困惑，请告诉我，我会更具体地问。

谢谢你尽你所能的帮助。

模型.java 

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collections;
import java.util.GregorianCalendar;

public class Model implements Serializable {
public static final int END_MORNING = 11;  // 11:00AM, inclusive
public static final int END_AFTERNOON = 16;  // 4:00PM, inclusive
private int locNumber;
private String locName;

private GregorianCalendar startDate;

private ArrayList<GregorianCalendar> datesSmoked = new ArrayList<GregorianCalendar>();
private ArrayList<String> locationsSmoked = new ArrayList<String>();
private ArrayList<String> locations = new ArrayList<String>();
private ArrayList<String> allIncidents = new ArrayList<String>();
private ArrayList<String> test  = new ArrayList<String>();

public String [] defaultLocations = {"Home", "Work", "Commuting", "School", "Bar", "Restaurant", "Social Gathering", "Other"};
public String [] eachSmoked;


public Model(GregorianCalendar date){
    startDate = date;

    for (String s : this.defaultLocations) {            
        locations.add(s);
    }           
}

public Model(){
    this(new GregorianCalendar()); // now
}   


public void setAllIncidentsArray() {        
    this.allIncidents.add(datesSmoked.toString());
    this.allIncidents.add(locationsSmoked.toString());
}

public void setEachSmoked() {
    for (int i = 0; i < locationsSmoked.size(); i++) {
        locNumber = Collections.frequency(locationsSmoked, locationsSmoked.get(i));
        locName = locations.get(i);
        test.add(i, locNumber + locName);
    }
}

public ArrayList<String> getEachSmoked() {              
    return this.test;
}

public ArrayList<String> getAllIncidentsArray() {
    return this.allIncidents;
}

public ArrayList<String> getlocationsArray() {
    return this.locations;
}

public ArrayList<String> getLocationsSmokedArray() {
    return this.locationsSmoked;
}

public ArrayList<GregorianCalendar> getDatesSmokedArray() {
    return this.datesSmoked;
}

public void incrementCount(String location) {   
    this.datesSmoked.add(new GregorianCalendar());  // now
    this.locationsSmoked.add(location);     
}

public int getTodayCount() {
    GregorianCalendar now = new GregorianCalendar();
    int todayDayOfYear = now.get(Calendar.DAY_OF_YEAR);

    int count = 0;
    for (GregorianCalendar day : this.datesSmoked)
        if (day.get(Calendar.DAY_OF_YEAR) == todayDayOfYear)
            count++;

    return count;
}

public int getTotalCount() {
    return this.datesSmoked.size();
}

public double getAverage() {
    if (getDays() > 0)
        return (double) getTotalCount() / getDays();
    else
        return 0.0;
}

public int getDays() {
    return (new GregorianCalendar()).get(Calendar.DAY_OF_YEAR) - startDate.get(Calendar.DAY_OF_YEAR) + 1;
}

public int getMorning() {
    int count = 0;
    for (GregorianCalendar date : this.datesSmoked)
        if (date.get(Calendar.HOUR_OF_DAY) <= END_MORNING)
            count++;

    return count;
}

public int getAfternoon() {
    int count = 0;
    for (GregorianCalendar date : this.datesSmoked)
        if (date.get(Calendar.HOUR_OF_DAY) > END_MORNING && date.get(Calendar.HOUR_OF_DAY) <= END_AFTERNOON)
            count++;

    return count;
}

public int getEvening() {
    int count = 0;
    for (GregorianCalendar date : this.datesSmoked)
        if (date.get(Calendar.HOUR_OF_DAY) > END_AFTERNOON)
            count++;

    return count;
}
}

Locations.java（位置活动）

import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class LocationActivity extends Activity {

public static final String SMOKIN_DATA_FILE = "smokin.dat";

public static Model model = null;

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

    setContentView(R.layout.activity_location);

    restoreModel();

    ListView listView = (ListView) findViewById(R.id.location_listview_Id);
    ArrayAdapter<String> listAdapter = new ArrayAdapter<String>(this,
            android.R.layout.simple_list_item_1, model.getEachSmoked());        
    listView.setAdapter(listAdapter);       
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.activity_location, menu);
    return true;
}

public void restoreModel() {
    // Restore from disk, or start with an empty model
    try {
        ObjectInputStream ois = new ObjectInputStream(
                openFileInput(SMOKIN_DATA_FILE));

        model = (Model) ois.readObject();
        ois.close();
    } catch (Exception e) {
        Log.v("*** DEBUG ***", "Error writing to file: " + e);
        model = new Model();
    }
}    

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle item selection
    switch (item.getItemId()) {

    case R.id.menu_home_Id:
        Intent homeIntent = new Intent(this, MainActivity.class);
        startActivity(homeIntent); ;
        return true;

    case R.id.menu_all_incidents_Id:
        Intent allIncidentsIntent = new Intent(this, AllIncidentsActivity.class);
        startActivity(allIncidentsIntent); ;
        return true;

    case R.id.menu_edit_locations_Id:
        Intent editLocationsIntent = new Intent(this, EditLocationsActivity.class);
        startActivity(editLocationsIntent); ;
        return true;
    default:
        return super.onOptionsItemSelected(item);
    }

}
}
4

1 回答 1

1

这看起来像是使用 a 的完美机会Hashtable<String, Integer>，哈希表将包含位置作为键和计数作为值。

现在，当您为 ListView 生成数据时，只需在 ArrayList 元素上迭代熏过的地方，如果该元素不在 HashTable 中，请将其添加并将 Value 设置为 0。如果它已经在其中，只需将其加一。

最后，您将拥有一个 HashTable，其中包含您需要的所有数据。

于 2013-03-10T20:11:07.383 回答