Java tutorial
/* * Copyright 2012 The Stanford MobiSocial Laboratory * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package mobisocial.musubi.objects; import java.util.List; import mobisocial.musubi.App; import mobisocial.musubi.R; import mobisocial.musubi.feed.iface.Activator; import mobisocial.musubi.feed.iface.DbEntryHandler; import mobisocial.musubi.feed.iface.FeedRenderer; import mobisocial.musubi.model.MApp; import mobisocial.musubi.model.helpers.AppManager; import mobisocial.musubi.provider.MusubiContentProvider; import mobisocial.musubi.provider.MusubiContentProvider.Provided; import mobisocial.musubi.service.MusubiService; import mobisocial.musubi.ui.fragments.FeedListFragment.FeedSummary; import mobisocial.musubi.ui.widget.DbObjCursorAdapter.DbObjCursor; import mobisocial.musubi.util.CommonLayouts; import mobisocial.musubi.util.InstrumentedActivity; import mobisocial.musubi.webapp.WebAppActivity; import mobisocial.socialkit.Obj; import mobisocial.socialkit.musubi.DbObj; import mobisocial.socialkit.musubi.Musubi; import mobisocial.socialkit.obj.MemObj; import org.json.JSONException; import org.json.JSONObject; import android.app.AlertDialog; import android.app.Dialog; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; import android.graphics.Typeface; import android.graphics.drawable.Drawable; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.DialogFragment; import android.view.Gravity; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.TextView; import android.widget.Toast; public class WebAppObj extends DbEntryHandler implements FeedRenderer, Activator { static final String TYPE = "webapp"; static final String OBJ_URL = "url"; @Override public String getType() { return TYPE; } public static Obj forUri(Uri uri) { try { JSONObject json = new JSONObject(); json.put(OBJ_URL, uri.toString()); return new MemObj(TYPE, json); } catch (JSONException e) { throw new IllegalStateException("bad json library", e); } } @Override public View createView(Context context, ViewGroup parent) { LinearLayout frame = new LinearLayout(context); frame.setLayoutParams(CommonLayouts.FULL_WIDTH); frame.setOrientation(LinearLayout.VERTICAL); LinearLayout appBar = new LinearLayout(context); appBar.setLayoutParams(CommonLayouts.FULL_WIDTH); appBar.setOrientation(LinearLayout.HORIZONTAL); frame.addView(appBar); Drawable icon = context.getResources().getDrawable(R.drawable.ic_menu_globe); ImageView iv = new ImageView(context); iv.setImageDrawable(icon); iv.setAdjustViewBounds(true); iv.setMaxWidth(60); iv.setMaxHeight(60); iv.setLayoutParams(CommonLayouts.WRAPPED); appBar.addView(iv); TextView tv = new TextView(context); tv.setLayoutParams(CommonLayouts.WRAPPED); tv.setGravity(Gravity.CENTER_VERTICAL); appBar.addView(tv); LinearLayout actionBar = new LinearLayout(context); actionBar.setLayoutParams(CommonLayouts.WRAPPED); actionBar.setOrientation(LinearLayout.HORIZONTAL); frame.addView(actionBar); Button b = new Button(context); // required for listview long-press b.setLayoutParams(CommonLayouts.WRAPPED); b.setFocusable(false); b.setText("Run"); b.setOnClickListener(getRunListener()); actionBar.addView(b); b = new Button(context); // required for listview long-press b.setLayoutParams(CommonLayouts.WRAPPED); b.setFocusable(false); b.setOnClickListener(getAddListener()); actionBar.addView(b); return frame; } @Override public void activate(Context context, DbObj obj) { // we have BUTTONS } @Override public void render(Context context, View view, DbObjCursor obj, boolean allowInteractions) throws Exception { LinearLayout frame = (LinearLayout) view; TextView tv = (TextView) ((ViewGroup) frame.getChildAt(0)).getChildAt(1); tv.setText("Webapp " + getAppName(obj)); if (allowInteractions) { Button b = (Button) ((ViewGroup) frame.getChildAt(1)).getChildAt(0); long objId = obj.objId; b.setTag(objId); b = (Button) ((ViewGroup) ((ViewGroup) view).getChildAt(1)).getChildAt(1); b.setTag(objId); AppManager am = new AppManager(App.getDatabaseSource(context)); MApp lookup = am.lookupAppByAppId(getAppId(obj)); //deleted ones can be readded //ensure app may have put it in the table without a url; if (lookup == null || lookup.deleted_ == true || lookup.webAppUrl_ == null) { b.setText("Add"); b.setEnabled(true); } else { b.setText("Added"); b.setEnabled(false); } } } OnClickListener mAddListener; private OnClickListener getAddListener() { if (mAddListener == null) { mAddListener = new OnClickListener() { @Override public void onClick(View v) { Context context = v.getContext(); if (context instanceof InstrumentedActivity) { InstrumentedActivity a = (InstrumentedActivity) context; try { DbObj obj = App.getMusubi(context).objForId((Long) v.getTag()); String name = getAppName(obj); Uri uri = Uri.parse(obj.getJson().optString(OBJ_URL)); String appId = getAppId(obj); a.showDialog(AddWebAppDialog.newInstance(obj.getLocalId(), appId, name, uri)); } catch (Throwable t) { Toast.makeText(context, "Failed to load webapp", Toast.LENGTH_SHORT).show(); } } } }; } return mAddListener; } OnClickListener mRunListener; private OnClickListener getRunListener() { if (mRunListener == null) { mRunListener = new OnClickListener() { @Override public void onClick(View v) { Context context = v.getContext(); DbObj obj = App.getMusubi(context).objForId((Long) v.getTag()); Intent appIntent = new Intent(Intent.ACTION_VIEW); appIntent.setClass(context, WebAppActivity.class); appIntent.putExtra(Musubi.EXTRA_FEED_URI, obj.getContainingFeed().getUri()); appIntent.putExtra(WebAppActivity.EXTRA_APP_NAME, getAppName(obj)); appIntent.putExtra(WebAppActivity.EXTRA_APP_URI, Uri.parse(obj.getJson().optString(OBJ_URL))); appIntent.putExtra(WebAppActivity.EXTRA_APP_ID, getAppId(obj)); context.startActivity(appIntent); } }; } return mRunListener; } String getAppName(Obj obj) { Uri appUri = Uri.parse(obj.getJson().optString(OBJ_URL)); String given = appUri.getQueryParameter("n"); if (given == null) { given = appUri.getLastPathSegment(); if (given == null || given.length() <= 1 || given.startsWith("index")) { List<String> segs = appUri.getPathSegments(); if (segs.size() > 1) { given = segs.get(segs.size() - 2); } else { given = appUri.getAuthority(); } } } return given; } String getAppId(Obj obj) { Uri appUri = Uri.parse(obj.getJson().optString(OBJ_URL)); return appUri.getAuthority() + "/" + getAppName(obj); } static class AddWebAppDialog extends DialogFragment { public static AddWebAppDialog newInstance(long objId, String appId, String name, Uri uri) { Bundle b = new Bundle(); b.putString("name", name); b.putParcelable("uri", uri); b.putString("appid", appId); b.putLong("objId", objId); AddWebAppDialog d = new AddWebAppDialog(); d.setArguments(b); return d; } public AddWebAppDialog() { } @Override public Dialog onCreateDialog(Bundle savedInstanceState) { final Uri appUri = getArguments().getParcelable("uri"); final String name = getArguments().getString("name"); final String appId = getArguments().getString("appid"); final long objId = getArguments().getLong("objId"); return new AlertDialog.Builder(getActivity()).setTitle("Add to app list?") .setMessage("Add " + name + " to your list of applications?") .setPositiveButton(R.string.yes, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { SQLiteOpenHelper databaseSource = App.getDatabaseSource(getActivity()); AppManager am = new AppManager(databaseSource); SQLiteDatabase db = databaseSource.getWritableDatabase(); db.beginTransaction(); MApp app = null; try { MApp lookup = am.lookupAppByAppId(appId); //could be re-adding //could have had this app discovered p2p if (lookup != null && lookup.deleted_ == false && lookup.webAppUrl_ != null) { Toast.makeText(getActivity(), "App already installed.", Toast.LENGTH_SHORT) .show(); return; } app = lookup; if (app == null) app = new MApp(); app.appId_ = appId; app.name_ = name; app.webAppUrl_ = appUri.toString(); app.deleted_ = false; if (lookup != null) { am.updateApp(app); } else { am.insertApp(app); } db.setTransactionSuccessful(); } finally { db.endTransaction(); } if (app == null || app.id_ == -1) { Toast.makeText(getActivity(), "Error installing webapp.", Toast.LENGTH_SHORT) .show(); } else { //load the app manifest //TODO: just load this one... getActivity().getContentResolver().notifyChange(MusubiService.UPDATE_APP_MANIFESTS, null); Toast.makeText(getActivity(), "Installed " + name + " to pin menu.", Toast.LENGTH_SHORT).show(); getActivity().getContentResolver().notifyChange( MusubiContentProvider.uriForItem(Provided.OBJS_ID, objId), null); } } }).setNegativeButton(R.string.no, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // no harm no foul } }).create(); } } @Override public void getSummaryText(Context context, TextView view, FeedSummary summary) { JSONObject obj = summary.getJson(); view.setTypeface(null, Typeface.ITALIC); view.setText(summary.getSender() + " posted a new web app: " + obj.optString(OBJ_URL)); } }