Refresh is working

source/src/me/caesar2011/vpherder/teachersubstitution/TSAdapter.java

@@ -62,7 +62,7 @@ public class TSAdapter extends ArrayAdapter<TSjsonAnnouncement> {
     public View getView(int position, View convertView, ViewGroup parent) {
         ViewHolder holder = null;
         int type = getItemViewType(position);
-        if (convertView == null) {
+        if (convertView == null || convertView.getTag() == null) {
             switch (type) {
                 case AnnounceType.REMARK:
                     convertView = mInflater.inflate(R.layout.teacher_substitution_row_remark, null);

source/src/me/caesar2011/vpherder/teachersubstitution/TSCreate.java

@@ -9,9 +9,11 @@ import java.io.StringWriter;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLConnection;
-import java.util.concurrent.ExecutionException;
+import java.util.ArrayList;
 
 import me.caesar2011.vpherder.R;
+import me.caesar2011.vpherder.views.PullToRefreshListView;
+import me.caesar2011.vpherder.views.PullToRefreshListView.OnRefreshListener;
 
 import org.apache.commons.io.IOUtils;
 import org.json.JSONException;
@@ -21,7 +23,6 @@ import android.os.AsyncTask;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.ListView;
 
 /**
  * Class to organize the drawings of the teacher substition.
@@ -35,6 +36,9 @@ public class TSCreate {
 	private final LayoutInflater inflater;
 	private final ViewGroup container;
 	private static TSjsonObject JsonObject;
+	private boolean downloadStarted;
+	private TSAdapter adapter;
+	private PullToRefreshListView listview;
 
 	/**
 	 * Constructor
@@ -43,26 +47,10 @@ public class TSCreate {
 		this.activity = activity;
 		this.inflater = inflater;
 		this.container = container;
+		this.downloadStarted = false;
 		
 		if(JsonObject == null){
-			try {
-				URL url = new URL("https://vpherder.canis.uberspace.de/example.json");
-				
-				DownloadFilesTask downloadSubstitutions = new DownloadFilesTask();
-				downloadSubstitutions.execute(url);
-				downloadSubstitutions.get();
-				String theString = downloadSubstitutions.getOutput()[0];
-				
-				JsonObject = new TSjsonObject(theString);
-			} catch (ExecutionException e) {
-				System.out.println("ERRRRRRRRRRRRRRRRRRRRROR ExecutionException!");
-			} catch (InterruptedException e) {
-				System.out.println("ERRRRRRRRRRRRRRRRRRRRROR InterruptedException!");
-			} catch (JSONException e) {
-				System.out.println("ERRRRRRRRRRRRRRRRRRRRROR JSONException!");
-			} catch (MalformedURLException e) {
-				System.out.println("ERRRRRRRRRRRRRRRRRRRRROR MalformedURLException!");
-			}
+			StartDownload();
 		}
 	}
 	
@@ -70,49 +58,71 @@ public class TSCreate {
 		View rootView = inflater.inflate(R.layout.fragment_teacher_substitution,
 				container, false);
 		
-		final ListView listview = (ListView) rootView.findViewById(R.id.listview);
+		listview = (PullToRefreshListView) rootView.findViewById(R.id.listview);
+		listview.setOnRefreshListener(new OnRefreshListener() {
 
-	    final TSAdapter adapter = new TSAdapter(activity,
-	    		R.layout.teacher_substitution_row_remark, JsonObject.announcements);
+			@Override
+			public void onRefresh() {
+				StartDownload();
+			}
+			
+		});
+		System.out.println(JsonObject);
+	    adapter = new TSAdapter(activity,
+	    		R.layout.teacher_substitution_row_remark, (JsonObject!=null)?JsonObject.announcements:(new ArrayList<TSjsonAnnouncement>()));
 	    listview.setAdapter(adapter);
-	    
 		return rootView;
 	}
 
+	public void StartDownload() {
+		if (!downloadStarted) {
+			downloadStarted = true;
+			try {
+				URL url = new URL("https://vpherder.canis.uberspace.de/example.json");
+				DownloadFilesTask downloadSubstitutions = new DownloadFilesTask();
+				downloadSubstitutions.execute(url);
+			} catch (MalformedURLException e) {
+				downloadStarted = false;
+			}
+		}
+	}
 
+	public void FinishDownload() {
+		downloadStarted = false;
+		adapter.clear();
+		adapter.addAll(JsonObject.announcements);
+		adapter.notifyDataSetChanged();
+		listview.onRefreshComplete();
+	}
 	
-	private class DownloadFilesTask extends AsyncTask<URL, Integer, String[]> {
-		private String[] outputFiles;
+	private class DownloadFilesTask extends AsyncTask<URL, Integer, String> {
 		
-		protected String[] doInBackground(URL... urls) {
-	        int count = urls.length;
-	        String[] files = new String[count];
-	        for (int i = 0; i < count; i++) {
+		protected String doInBackground(URL... urls) {
+			String file = "";
+	        URL url = urls[0];
 			URLConnection connection;
 			try {
-					connection = urls[i].openConnection();
+				connection = url.openConnection();
 				InputStream inputStream = connection.getInputStream();
-	            	publishProgress((int) ((i / (float) count) * 100));
 
 				StringWriter writer = new StringWriter();
 				IOUtils.copy(inputStream, writer, "UTF-8");
-					files[i] = writer.toString();
+				file = writer.toString();
 			} catch (IOException e) {
 			}
-	            
-	            // Escape early if cancel() is called
-	            if (isCancelled()) break;
-	        }
-	        outputFiles = files;
-	        return files;
+	        return file;
 	    }
 
 		protected void onProgressUpdate(Integer... progress) {
 	        //setProgressPercent(progress[0]);
 	    }
 		
-		protected String[] getOutput() {
-			return outputFiles;
+		protected void onPostExecute(String result) {
+			try {
+				JsonObject = new TSjsonObject(result);
+			} catch (JSONException e) {
+			}
+			FinishDownload();
 		}
 	}
 }

source/src/me/caesar2011/vpherder/views/PullToRefreshListView.java

@@ -21,6 +21,7 @@ public class PullToRefreshListView extends ListView implements OnScrollListener
 	private View mHeaderView;
 	private HeaderViewHolder mHeaderViewHolder;
 	private int mLastTopVisiblePos;
+	private OnRefreshListener mOnRefreshListener;
 	
 	private static final int PULL_DOWN_LIMIT = (int) Math.round(0.75 * DisplayMetrics.DENSITY_DEFAULT);
 	
@@ -48,6 +49,7 @@ public class PullToRefreshListView extends ListView implements OnScrollListener
         mHeaderView = mInflater.inflate(R.layout.pull_to_refresh_header, null);
         mHeaderViewHolder = new HeaderViewHolder(mHeaderView);
         addHeaderView(mHeaderView);
+        System.out.println("k"+mHeaderView);
         
         mRefreshState = RefreshState.PULL_TO_REFRESH;
 	}
@@ -68,7 +70,7 @@ public class PullToRefreshListView extends ListView implements OnScrollListener
     	boolean isHandled = false;
     	
     	if (event.getAction() == MotionEvent.ACTION_DOWN || mLastTopVisiblePos == 1) {
-    		int refreshBoxHeight = (int) ((mRefreshState == RefreshState.REFRESHING)?PULL_DOWN_LIMIT+15:1);
+    		int refreshBoxHeight = (int) ((mRefreshState == RefreshState.REFRESHING)?PULL_DOWN_LIMIT:1);
     		mStartX = event.getRawX();
     		mStartY = event.getRawY()-refreshBoxHeight;
     		mHeaderViewHolder.setVisibility(View.VISIBLE);
@@ -76,9 +78,6 @@ public class PullToRefreshListView extends ListView implements OnScrollListener
         }
     	if (event.getRawY()-mStartY > Math.abs(event.getRawX()-mStartX) && getFirstVisiblePosition() == 0) {
 	    	int stretch = (int) Math.max(0, event.getRawY()-mStartY);
-        	System.out.println(event.getRawY()-mStartY);
-        	System.out.println(Math.abs(event.getRawX()-mStartX));
-        	System.out.println("--");
 	    	mHeaderView.setLayoutParams(new LayoutParams(mHeaderView.getLayoutParams().width, stretch));
 	    	if (mRefreshState == RefreshState.PULL_TO_REFRESH && stretch > PULL_DOWN_LIMIT) {
 	    		mRefreshState = RefreshState.RELEASE_TO_REFRESH;
@@ -89,7 +88,7 @@ public class PullToRefreshListView extends ListView implements OnScrollListener
 	    	} else if (mRefreshState == RefreshState.ABORTING && stretch > PULL_DOWN_LIMIT) {
 	    		mRefreshState = RefreshState.RELEASE_TO_REFRESH;
 	    		mHeaderViewHolder.setRefreshingState(mRefreshState);
-	    	} else if (mRefreshState == RefreshState.REFRESHING && stretch <= PULL_DOWN_LIMIT) {
+	    	} else if (mRefreshState == RefreshState.REFRESHING && stretch <= PULL_DOWN_LIMIT/2) {
 	    		mRefreshState = RefreshState.ABORTING;
 	    		mHeaderViewHolder.setRefreshingState(mRefreshState);
 	    	}
@@ -104,10 +103,7 @@ public class PullToRefreshListView extends ListView implements OnScrollListener
         		mHeaderView.setLayoutParams(new LayoutParams(mHeaderView.getLayoutParams().width, 0));
         		break;
         	case RefreshState.RELEASE_TO_REFRESH:
-        		mHeaderViewHolder.setVisibility(View.VISIBLE);
-        		mRefreshState = RefreshState.REFRESHING;
-        		mHeaderViewHolder.setRefreshingState(mRefreshState);
-        		mHeaderView.setLayoutParams(new LayoutParams(mHeaderView.getLayoutParams().width, PULL_DOWN_LIMIT));
+        		Refresh();
         		break;
         	case RefreshState.REFRESHING:
         		mHeaderView.setLayoutParams(new LayoutParams(mHeaderView.getLayoutParams().width, PULL_DOWN_LIMIT));
@@ -162,4 +158,30 @@ public class PullToRefreshListView extends ListView implements OnScrollListener
     	public static final int REFRESHING = 3;
     	public static final int ABORTING = 4;
     }
+    
+    public void Refresh() {
+		mHeaderViewHolder.setVisibility(View.VISIBLE);
+		mRefreshState = RefreshState.REFRESHING;
+		mHeaderViewHolder.setRefreshingState(mRefreshState);
+		mHeaderView.setLayoutParams(new LayoutParams(mHeaderView.getLayoutParams().width, PULL_DOWN_LIMIT));
+		System.out.print("onRefresh");
+    	if (mOnRefreshListener != null) {
+    		mOnRefreshListener.onRefresh();
+    	}
+    }
+    
+    public void setOnRefreshListener(OnRefreshListener onRefreshListener) {
+    	mOnRefreshListener = onRefreshListener;
+    }
+    
+    public void onRefreshComplete() {
+		mHeaderViewHolder.setVisibility(View.GONE);
+		mRefreshState = RefreshState.PULL_TO_REFRESH;
+		mHeaderViewHolder.setRefreshingState(mRefreshState);
+		mHeaderView.setLayoutParams(new LayoutParams(mHeaderView.getLayoutParams().width, 0));
+    }
+    
+    public interface OnRefreshListener {
+    	public void onRefresh();
+    }
 }