我想从 json 在 android 中显示列表视图
仪表板活动.java
public class DashboardActivity extends ListActivity {
private static String url = "http://git.drieanto.net/LagiDimanaAPI/index.php/user/get_following/";
private static String KEY_FOLLOWING = "following";
private static String KEY_SUCCESS = "success";
private static String KEY_ERROR = "error";
private static String KEY_ERROR_MSG = "error_msg";
private static String KEY_REGID = "regid";
private static String KEY_ID_USER = "id_user";
private static String KEY_NAMA = "nama";
private static String KEY_EMAIL = "email";
private static String KEY_JKEL = "jenis_kelamin";
private static String KEY_TLAHIR = "tanggal_lahir";
private static String KEY_INSTANSI = "instansi";
private static String KEY_JABATAN = "jabatan";
private static String KEY_DIBUAT_AT = "dibuat_at";
private static String KEY_AVATAR = "avatar";
private static String KEY_STATUS = "status";
UserFunctions userFunctions;
// following JSONArray
JSONArray following = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
/**
* Dashboard Screen for the application
* */
// Check login status in database
userFunctions = new UserFunctions();
if(userFunctions.isUserLoggedIn(getApplicationContext())){
setContentView(R.layout.dashboard);
DatabaseHandler db = new DatabaseHandler(getApplicationContext());
HashMap user = db.getUserDetails();
String regid = (String) user.get("regid");
// Hashmap for ListView
ArrayList<HashMap<String, String>> followingList = new ArrayList<HashMap<String, String>>();
// Creating JSON Parser instance
JSONParser jParser = new JSONParser();
// getting JSON string from URL
JSONObject json = jParser.getJSONFromUrl(url+regid);
try {
// Getting Array of Contacts
following = json.getJSONArray(KEY_FOLLOWING);
// looping through All Contacts
for(int i = 0; i < following.length(); i++){
JSONObject c = following.getJSONObject(i);
// Storing each json item in variable
String nama2 = c.getString(KEY_NAMA);
String email2 = c.getString(KEY_EMAIL);
String avatar2 = c.getString(KEY_AVATAR);
String status = c.getString(KEY_STATUS);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(KEY_NAMA, nama2);
map.put(KEY_EMAIL, email2);
map.put(KEY_AVATAR, avatar2);
map.put(KEY_STATUS, status);
// adding HashList to ArrayList
followingList.add(map);
}
} catch (JSONException e) {
e.printStackTrace();
}
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(this, followingList,
R.layout.list_item,
new String[] { KEY_NAMA, KEY_EMAIL, KEY_AVATAR, KEY_STATUS }, new int[] {
R.id.nama, R.id.email, R.id.avatar, R.id.status });
setListAdapter(adapter);
/*btnLogout.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
userFunctions.logoutUser(getApplicationContext());
Intent login = new Intent(getApplicationContext(), LoginActivity.class);
login.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(login);
// Closing dashboard screen
finish();
}
});*/
}else{
// user is not logged in show login screen
Intent login = new Intent(getApplicationContext(), LoginActivity.class);
login.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(login);
// Closing dashboard screen
finish();
}
}
}
list_item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<!-- Name Label -->
<TextView
android:id="@+id/nama"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="#43bd00"
android:textSize="16sp"
android:textStyle="bold"
android:paddingTop="6dip"
android:paddingBottom="2dip" />
<!-- Description label -->
<TextView
android:id="@+id/email"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="#acacac"
android:paddingBottom="2dip">
</TextView>
<TextView
android:id="@+id/avatar"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="#acacac"
android:paddingBottom="2dip">
</TextView>
<!-- Linear layout for cost and price Cost: Rs.100 -->
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<!-- Cost Label -->
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#5d5d5d"
android:gravity="left"
android:textStyle="bold"
android:text="Status: " >
</TextView>
<!-- Price Label -->
<TextView
android:id="@+id/status"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#acacac"
android:textStyle="bold"
android:gravity="left">
</TextView>
</LinearLayout>
</LinearLayout>
</LinearLayout>
我从http://git.drieanto.net/LagiDimanaAPI/index.php/user/get_following/XX2获取 json 数据
我认为这段代码不包含错误，但没有数据显示只有黑色空白不包含列表可以帮助我，因为对我来说非常重要谢谢