修復列表視圖上的JSONResponse

Question

我想從我的JSON響應中向listview添加行。下面是我從中得到JSON和打印他們在cosole代碼：

HttpClient hClient = new DefaultHttpClient(); 
     HttpGet hGet = new HttpGet(
       "APIHere"); 
     ResponseHandler<String> rHandler = new BasicResponseHandler(); 
     data = hClient.execute(hGet, rHandler); 

     JSONObject rootObj = new JSONObject(data); 
     JSONObject searchObj = rootObj.getJSONObject("searchdata"); 
     JSONArray titlesObj = searchObj.getJSONArray("titles"); 
     JSONArray descsObj = searchObj.getJSONArray("desc"); 
     JSONArray linksObj = searchObj.getJSONArray("links"); 

     for (int i = 0; i < titlesObj.length(); i++) { 
      String title = titlesObj.getString(i); 
      System.out.println("Titles: " + title); 
     } 

     for (int i = 0; i < descsObj.length(); i++) { 
      String desc = descsObj.getString(i); 
      System.out.println("Desc: " + desc); 
     } 

     for (int i = 0; i < linksObj.length(); i++) { 
      String link = linksObj.getString(i); 
      System.out.println("Link: " + link); 
     } 

我遍歷整個JSONArray，我能打印那些在控制檯中。現在，我想把這些響應放在listview中。我對此沒有任何線索。

任何形式的幫助將不勝感激。

Answer 1

有關讀取的數組項，並顯示到一個ListView：

ArrayList titles = new ArrayList(); 
ArrayList descs= new ArrayList(); 
ArrayList links= new ArrayList(); 

for (int i = 0; i < titlesObj.length(); i++) { 
     String title = titlesObj.getString(i); 
     titles.add(title); 
     System.out.println("Titles: " + title); 
    } 

    for (int i = 0; i < descsObj.length(); i++) { 
     String desc = descsObj.getString(i); 
     descs.add(title); 
     System.out.println("Desc: " + desc); 
    } 

    for (int i = 0; i < linksObj.length(); i++) { 
     String link = linksObj.getString(i); 
     links.add(title); 
     System.out.println("Link: " + link); 
    } 

接下來你做此ArrayList到ListView來源是這樣的：

// Get a handle to the list views 

//get your instance of the listview for titles 

     ListView lvTitle = (ListView) findViewById(R.id.ListView01); 
    lv.setAdapter(new ArrayAdapter<string>((Your activity class).this, 
       android.R.layout.simple_list_item_1, titles)); 

//get your instance of the listview for descriptions 

ListView lvDesc = (ListView) findViewById(R.id.ListView02); 
    lv.setAdapter(new ArrayAdapter<string>((Your activity class).this, 
       android.R.layout.simple_list_item_1, descs)); 

//get your instance of the listview for links 

ListView lvLinks = (ListView) findViewById(R.id.ListView03); 
    lv.setAdapter(new ArrayAdapter<string>((Your activity class).this, 
       android.R.layout.simple_list_item_1, links)); 

編輯：

好吧，無論我說應該已經解決了你的問題。在真主裏。但是，我可以看到你正在使用相同的活動來溝通一個rem ote服務器來獲取數據。我建議，如果您爲此單獨創建一個類，最好返回json文本data。然後，您可以從您的活動中調用此類來獲取數據並設置活動中的列表視圖。這將避免不必要的滯後和強制關閉您的應用程序。

如果這解決了您的問題，請將其標記爲幫助他人的答案。

UPDATE：

你需要實現一個自定義的適配器that.You需要定義一個listitem.xml使用佈局按照您的requirement.Then它膨脹到列表視圖。按照tutorial。

樣品行：

list_row.xml 

<!-- ListRow Left sied Thumbnail product image --> 
<LinearLayout android:id="@+id/thumbnail" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:padding="3dip" 
    android:layout_alignParentLeft="true" 
    android:background="@drawable/image_bg" 
    android:layout_marginRight="5dip"> 

    <ImageView 
     android:id="@+id/list_image" 
     android:layout_width="50dip" 
     android:layout_height="50dip" 
     android:src="@drawable/someImage"/> 

</LinearLayout> 

<!-- Your title--> 
<TextView 
    android:id="@+id/title" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignTop="@+id/thumbnail" 
    android:layout_toRightOf="@+id/thumbnail" 
    android:text="Big Title" 
    android:textColor="#040404" 
    android:typeface="sans" 
    android:textSize="15dip" 
    android:textStyle="bold"/> 

<!-- Your subtitle --> 
<TextView 
    android:id="@+id/subtitle" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:layout_below="@id/title" 
    android:textColor="#343434" 
    android:textSize="10dip" 
    android:layout_marginTop="1dip" 
    android:layout_toRightOf="@+id/thumbnail" 
    android:text="Smaller sub title" /> 

<!-- Rightend info --> 
<TextView 
    android:id="@+id/duration" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignParentRight="true" 
    android:layout_alignTop="@id/title" 
    android:gravity="right" 
    android:text="info" 
    android:layout_marginRight="5dip" 
    android:textSize="10dip" 
    android:textColor="#10bcc9" 
    android:textStyle="bold"/> 

<!-- Rightend Arrow --> 
<ImageView android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:src="@drawable/arrow" 
    android:layout_alignParentRight="true" 
    android:layout_centerVertical="true"/> 

這將使你的列表行的樣子：

注：我不鼓勵音樂personally.This只是一個example.Please用它來做一個更好的目的：微笑：

Answer 2

1.創建一個POJO根據自己的需要/響應你得到

public class SearchData { 
    private String title; 
    private String Description; 
    private String link; 

    //getter & setter methods for each field 
} 

2.創建一個對象List<SearchData>和通過解析響應

List<SearchData> list = new ArrayList<SearchData>(); 
//parse JSON array to SearchData object and add it to list 
list.add(searchDataObject); 

3a中填充它。如果您只願意顯示標題（即如果簡單的佈局就足夠了）

ArrayAdapter<SearchData> adapter = new ArrayAdapter<Product>(this, android.R.layout.simple_list_item_1, list); 
listview.setAdapter(adapter); 

**您還需要重寫SearchData POJO的toString()方法返回標題即

public class SearchData { 
    .... 
    @Override 
    public String toString() { 
     return title; 
    } 
} 

3B。在另一方面，如果你願意使用自定義佈局，那麼你需要擴展一個ArrayAdapter並覆蓋getView方法，然後綁定新的適配器，我們在步驟3a一樣的工作方式，但這次與自定義適配器更換ArrayAdapter

資源：

的建議通過拉姆基蘭1解析JSON響應的ListView：http://p-xr.com/android-tutorial-how-to-parse-read-json-data-into-a-android-listview/

2定製ListView和使用個人適配器：http://www.ezzylearning.com/tutorial.aspx?tid=1763429

Answer 3

HttpClient hClient = new DefaultHttpClient(); 
    HttpGet hGet = new HttpGet(
      "APIHere"); 
    ResponseHandler<String> rHandler = new BasicResponseHandler(); 
    data = hClient.execute(hGet, rHandler); 

    JSONObject rootObj = new JSONObject(data); 
    JSONObject searchObj = rootObj.getJSONObject("searchdata"); 
    JSONArray titlesObj = searchObj.getJSONArray("titles"); 
    JSONArray descsObj = searchObj.getJSONArray("desc"); 
    JSONArray linksObj = searchObj.getJSONArray("links"); 

    String[] a = new String[titlesObj.length()]; 

    String[] b = new String[descsObj.length()]; 

    String[] c = new String[linksObj.length()]; 

    for (int i = 0; i < titlesObj.length(); i++) { 

    String title = titlesObj.getString(i); 

    a[i] = title; 

    } 

    for (int i = 0; i < descsObj.length(); i++) { 

    String desc = descsObj.getString(i); 

    b[i] = desc; 

    } 

    for (int i = 0; i < linksObj.length(); i++) { 

    String link = linksObj.getString(i); 

    c[i] = link; 

    } 

    ArrayList<String> al=new ArrayList<String>(); 


    //if three jsonarrays having same length 

    for(i=0;i<linksObj.length();i++) 

    { 

    al.add(" " +a[i]+" " +b[i]+""+c[i]+""); 

    } 

    ArrayAdapter<String> adapter=new ArrayAdapter<String>this,android.R.layout.simple_list_item_1,al); 

    ListView lv=(ListView)findViewById(R.id.listview); 

lv.setAdapter(adapter); 
    }