Android将项目添加到列表中

我想向我的listview添加一些json项。如何在java文件中添加项目

json示例：

{"responseData": {"media":[{
                              "freshness":"1",
                              "critic":"Roger Moore",
                              "quote":"Adequate",
                              "publication":"McClatchy-Tribune News Service",
                              "date":"2013-01-08"
                            },
                            {
                               "freshness":"1",
                               "critic":"Laremy Legel",
                               "quote":"You won't be upset you saw it, you'll have some fun, you'll see Wolvie beat the living hell out of a helicopter.",
                               "publication":"Film.com","date":"2010-07-07"
                             },
                             {
                               "freshness":"1",
                               "critic":"Sara Vilkomerson",
                               "quote":"Did the plot points stick in my head five minutes after leaving the theater? Not so much ... but I know I was having fun while watching.",
                               "publication":"New York Observer",
                               "date":"2009-05-06"
                              }
}]}}

爪哇

stringurl=”http://site.com/";
ajax（url，JSONObject.class，新的AjaxCallback（）{
@凌驾
公共无效回调（字符串url、JSONObject json、AjaxStatus状态）{
if（json！=null）{
JSONArray ja=json.optJSONObject（“responseData”）.optJSONArray（“media”）；
试试{
字符串测试=null；
对于（int i=0；i

list.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" 
>


<ListView
    android:id="@+id/list"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" 
    android:divider="#FF800000"
  >

</ListView>

list_body.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"   
android:orientation="vertical" 
>

<TextView
android:id="@+id/freshness"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="12sp"
android:textStyle="bold"/>

<TextView
android:id="@+id/critic"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="12sp"
android:textStyle="bold"/>

<TextView
android:id="@+id/quote"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="12sp"
android:textStyle="bold"/>

<TextView
android:id="@+id/date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="12sp"
android:textStyle="bold"/>


</LinearLayout>

我想向我的listview添加一些json项。如何在java文件中添加项目？

我建议您：

您需要一个扩展BaseAdapter或ArrayAdapter的适配器

• 从JSON字符串解析数据
• 添加到适配器

如何解析数据

使用JSON字符串：

• 必须分析名为“responseData”的对象
  JSONObject mResponseDataObject=新的JSONObject（您的JSONString）

• 解析JSONArray“媒体”
  JSONArray mmediarray=mResponseDataObject.getJSONArray（JSON_MEDIA_KEY）；//JSON\u MEDIA\u KEY=“媒体”

在mMediaArray->中的每个项目中，您应该解析到一个对象

class Media {
    private int freshness;
    private String critic;
    private String quote;
    private String publication;
    private Date date;

    // Constructors, Getters & Setters
}

您必须通过以下方式进行分析：

ArrayList<Media> mMedias = new ArrayList<Media>();

for (int i = 0; i < mMeidaArray.length(); i++) {
    JSONObject mMediaObject = mMediaArray.getJSONObject(i);
    int freshness = mMediaObject.getInt(MEDIA_FRESHNESS); // MEDIA_FRESHNESS = "freshness";
    //....
    mMedias.add(new Media(freshness, critic, quote, publication, date));
}

例如：

public class MyAdapter extends ArrayAdapter<Media> {
  private final Context context;
  private ArrayList<Media> mMedias;

  public MySimpleArrayAdapter(Context context, ArrayList<Media> aMedias) {
    super(context, R.layout.rowlayout, values);
    this.context = context;
    this.mMedias = aMedias;
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    LayoutInflater inflater = (LayoutInflater) context
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View rowView = inflater.inflate(R.layout.list, parent, false);

    TextView textView = (TextView) rowView.findViewById(R.id.critic);
    textView.setText(mMedias.get(position).getCritic());
    // ….
    return rowView;
  }
} 

公共类MyAdapter扩展了ArrayAdapter{
私人最终语境；
私人律师事务所；
公共mySimpleArrayaAdapter（上下文，ArrayList aMedias）{
super（上下文、R.layout.rowlayout、值）；
this.context=上下文；
this.mMedias=aMedias；
}
@凌驾
公共视图getView（int位置、视图转换视图、视图组父视图）{
LayoutFlater充气器=（LayoutFlater）上下文
.getSystemService（上下文布局\充气机\服务）；
视图行视图=充气机充气（R.layout.list，父级，false）；
TextView TextView=（TextView）rowView.findViewById（R.id.critic）；
textView.setText（mMedias.get（position.getCritic（））；
// ….
返回行视图；
}
} 

MyAdapter mAdapter = new MyAdapter(getApplicationContext(), mMedias);
yourListView.setAdapter(mAdapter);

public class MyAdapter extends ArrayAdapter<Media> {
  private final Context context;
  private ArrayList<Media> mMedias;

  public MySimpleArrayAdapter(Context context, ArrayList<Media> aMedias) {
    super(context, R.layout.rowlayout, values);
    this.context = context;
    this.mMedias = aMedias;
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    LayoutInflater inflater = (LayoutInflater) context
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View rowView = inflater.inflate(R.layout.list, parent, false);

    TextView textView = (TextView) rowView.findViewById(R.id.critic);
    textView.setText(mMedias.get(position).getCritic());
    // ….
    return rowView;
  }
}