我正在尝试将解析的杰森数据显示到 ListView
ListViewAdapterForAtomicListItemtype.java
public class ListViewAdapterForAtomicListItemtype extends BaseAdapter {
// Declare Variables
Context context;
LayoutInflater inflater;
ArrayList<HashMap<String, String>> data;
HashMap<String, String> resultp = new HashMap<String, String>();
public ListViewAdapterForAtomicListItemtype(Context context,
ArrayList<HashMap<String, String>> arraylist) {
this.context = context;
data = arraylist;
}
@Override
public int getCount() {
return data.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
public View getView(final int position, View convertView, ViewGroup parent) {
// Declare Variables
TextView name;
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View itemView = inflater.inflate(R.layout.listview_item_for_atomic_list_item_type, parent, false);
// Get the position
resultp = data.get(position);
// Locate the TextViews in listview_item.xml
name = (TextView) itemView.findViewById(R.id.textView_id_atomic_list_item_type);
// Capture position and set results to the TextViews
name.setText(resultp.get(MainActivity.NAME));
return itemView;
}
}
BLD_IndividualListOfItems_MainCourse.java
public class BLD_IndividualListOfItems_MainCourse extends Activity{
// Declare Variables
JSONObject jsonobject;
JSONArray jsonarray;
ListView listview;
ListViewAdapterForAtomicListItemtype adapter;
ProgressDialog mProgressDialog;
ArrayList<HashMap<String, String>> arraylist;
static String NAME = "rank";
String TYPE_FILTER;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Get the view from listview_main.xml
setContentView(R.layout.listview_main);
TYPE_FILTER = getIntent().getExtras().getString("key_title");
Log.v("---- Value-MC---", TYPE_FILTER);
// Locate the listview in listview_main.xml
listview = (ListView) findViewById(R.id.listview);
// Execute DownloadJSON AsyncTask
new DownloadJSON().execute();
}
// DownloadJSON AsyncTask
private class DownloadJSON extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Create a progressdialog
mProgressDialog = new ProgressDialog(BLD_IndividualListOfItems_MainCourse.this);
// Set progressdialog title
//mProgressDialog.setTitle("Fetching the information");
// Set progressdialog message
mProgressDialog.setMessage("Loading...");
mProgressDialog.setIndeterminate(false);
// Show progressdialog
mProgressDialog.show();
}
@Override
protected Void doInBackground(Void... params) {
// Create an array
arraylist = new ArrayList<HashMap<String, String>>();
String newurl = "?" + "Key=" + TYPE_FILTER.trim();
// Retrieve JSON Objects from the given URL address
jsonobject = JSONfunctions.getJSONfromURL("http://54.218.73.244:7005/RestaurantAtomicListItemType/"+newurl);
try {
// Locate the array name in JSON
jsonarray = jsonobject.getJSONArray("restaurants");
for (int i = 0; i < jsonarray.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
jsonobject = jsonarray.getJSONObject(i);
// Retrive JSON Objects
map.put(MainActivity.NAME, jsonobject.getString("MasterListMenuName"));
// Set the JSON Objects into the array
arraylist.add(map);
}
} catch (JSONException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void args) {
// Pass the results into ListViewAdapter.java
adapter = new ListViewAdapterForAtomicListItemtype(BLD_IndividualListOfItems_MainCourse.this, arraylist);
// Set the adapter to the ListView
listview.setAdapter(adapter);
// Close the progressdialog
mProgressDialog.dismiss();
}
}
}
日志::
12-30 14:34:25.056: V/---- Value-MC---(1266): Main Course
12-30 14:34:27.196: E/log_tag(1266): Error in http connection java.lang.IllegalArgumentException: Illegal character in query at index 64: http://54.218.73.244:7005/RestaurantAtomicListItemType/?Key=Main Course
12-30 14:34:27.196: E/log_tag(1266): Error converting result java.lang.NullPointerException
12-30 14:34:27.214: E/log_tag(1266): Error parsing data org.json.JSONException: End of input at character 0 of
12-30 14:34:27.224: W/dalvikvm(1266): threadid=13: thread exiting with uncaught exception (group=0x4001d800)
12-30 14:34:27.264: E/AndroidRuntime(1266): FATAL EXCEPTION: AsyncTask #3
12-30 14:34:27.264: E/AndroidRuntime(1266): java.lang.RuntimeException: An error occured while executing doInBackground()
12-30 14:34:27.264: E/AndroidRuntime(1266): at android.os.AsyncTask$3.done(AsyncTask.java:200)
12-30 14:34:27.264: E/AndroidRuntime(1266): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
12-30 14:34:27.264: E/AndroidRuntime(1266): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
12-30 14:34:27.264: E/AndroidRuntime(1266): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
12-30 14:34:27.264: E/AndroidRuntime(1266): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
12-30 14:34:27.264: E/AndroidRuntime(1266): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
12-30 14:34:27.264: E/AndroidRuntime(1266): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
12-30 14:34:27.264: E/AndroidRuntime(1266): at java.lang.Thread.run(Thread.java:1096)
12-30 14:34:27.264: E/AndroidRuntime(1266): Caused by: java.lang.NullPointerException
12-30 14:34:27.264: E/AndroidRuntime(1266): at com.project.findmybuffet.BLD_IndividualListOfItems_MainCourse$DownloadJSON.doInBackground(BLD_IndividualListOfItems_MainCourse.java:79)
12-30 14:34:27.264: E/AndroidRuntime(1266): at com.project.findmybuffet.BLD_IndividualListOfItems_MainCourse$DownloadJSON.doInBackground(BLD_IndividualListOfItems_MainCourse.java:1)
12-30 14:34:27.264: E/AndroidRuntime(1266): at android.os.AsyncTask$2.call(AsyncTask.java:185)
12-30 14:34:27.264: E/AndroidRuntime(1266): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
12-30 14:34:27.264: E/AndroidRuntime(1266): ... 4 more
12-30 14:34:27.384: D/dalvikvm(1266): GC_FOR_MALLOC freed 2532 objects / 166712 bytes in 93ms
12-30 14:34:28.654: E/WindowManager(1266): Activity com.project.findmybuffet.BreakfastLunchDinnerIndividualListOfItems has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@45f511f8 that was originally added here
12-30 14:34:28.654: E/WindowManager(1266): android.view.WindowLeaked: Activity com.project.findmybuffet.BreakfastLunchDinnerIndividualListOfItems has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@45f511f8 that was originally added here
12-30 14:34:28.654: E/WindowManager(1266): at android.view.ViewRoot.<init>(ViewRoot.java:247)
12-30 14:34:28.654: E/WindowManager(1266): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148)
12-30 14:34:28.654: E/WindowManager(1266): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
12-30 14:34:28.654: E/WindowManager(1266): at android.view.Window$LocalWindowManager.addView(Window.java:424)
12-30 14:34:28.654: E/WindowManager(1266): at android.app.Dialog.show(Dialog.java:241)
12-30 14:34:28.654: E/WindowManager(1266): at com.project.findmybuffet.BLD_IndividualListOfItems_MainCourse$DownloadJSON.onPreExecute(BLD_IndividualListOfItems_MainCourse.java:63)
12-30 14:34:28.654: E/WindowManager(1266): at android.os.AsyncTask.execute(AsyncTask.java:391)
12-30 14:34:28.654: E/WindowManager(1266): at com.project.findmybuffet.BLD_IndividualListOfItems_MainCourse.onCreate(BLD_IndividualListOfItems_MainCourse.java:46)
12-30 14:34:28.654: E/WindowManager(1266): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-30 14:34:28.654: E/WindowManager(1266): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
12-30 14:34:28.654: E/WindowManager(1266): at android.app.ActivityThread.startActivityNow(ActivityThread.java:2503)
12-30 14:34:28.654: E/WindowManager(1266): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127)
12-30 14:34:28.654: E/WindowManager(1266): at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339)
12-30 14:34:28.654: E/WindowManager(1266): at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:651)
12-30 14:34:28.654: E/WindowManager(1266): at android.widget.TabHost.setCurrentTab(TabHost.java:323)
12-30 14:34:28.654: E/WindowManager(1266): at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:129)
12-30 14:34:28.654: E/WindowManager(1266): at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:453)
12-30 14:34:28.654: E/WindowManager(1266): at android.view.View.performClick(View.java:2408)
12-30 14:34:28.654: E/WindowManager(1266): at android.view.View$PerformClick.run(View.java:8816)
12-30 14:34:28.654: E/WindowManager(1266): at android.os.Handler.handleCallback(Handler.java:587)
12-30 14:34:28.654: E/WindowManager(1266): at android.os.Handler.dispatchMessage(Handler.java:92)
12-30 14:34:28.654: E/WindowManager(1266): at android.os.Looper.loop(Looper.java:123)
12-30 14:34:28.654: E/WindowManager(1266): at android.app.ActivityThread.main(ActivityThread.java:4627)
12-30 14:34:28.654: E/WindowManager(1266): at java.lang.reflect.Method.invokeNative(Native Method)
12-30 14:34:28.654: E/WindowManager(1266): at java.lang.reflect.Method.invoke(Method.java:521)
12-30 14:34:28.654: E/WindowManager(1266): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-30 14:34:28.654: E/WindowManager(1266): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-30 14:34:28.654: E/WindowManager(1266): at dalvik.system.NativeStart.main(Native Method)
最佳答案
只需在主菜中使用％20作为空间，如下所示
http://54.218.73.244:7005/RestaurantAtomicListItemType/?Key=Main%20Course
关于java - 在android中解析数据到listview，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20836485/