Java tutorial
/* * Copyright (c) 2013, Psiphon Inc. * All rights reserved. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * */ package ca.psiphon.ploggy; import android.content.Intent; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentTransaction; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.ListView; import android.widget.ScrollView; import android.widget.TextView; import com.squareup.otto.Subscribe; /** * User interface which displays self status details and * allows user to set message. * * This class subscribes to status events to update data * while in the foreground (e.g., location data updated * the the engine). */ public class FragmentSelfStatusDetails extends Fragment { private static final String LOG_TAG = "Self Status Details"; private Fragment mFragmentComposeMessage; private ScrollView mScrollView; private ImageView mAvatarImage; private TextView mNicknameText; private TextView mFingerprintText; private ListView mMessagesList; private MessageAdapter mMessageAdapter; private TextView mLocationLabel; private TextView mLocationStreetAddressLabel; private TextView mLocationStreetAddressText; private TextView mLocationCoordinatesLabel; private TextView mLocationCoordinatesText; private TextView mLocationPrecisionLabel; private TextView mLocationPrecisionText; private TextView mLocationTimestampLabel; private TextView mLocationTimestampText; Utils.FixedDelayExecutor mRefreshUIExecutor; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.self_status_details, container, false); mFragmentComposeMessage = new FragmentComposeMessage(); FragmentTransaction transaction = getChildFragmentManager().beginTransaction(); transaction.add(R.id.fragment_self_status_details_compose_message, mFragmentComposeMessage).commit(); mScrollView = (ScrollView) view.findViewById(R.id.self_status_details_scroll_view); mAvatarImage = (ImageView) view.findViewById(R.id.self_status_details_avatar_image); mNicknameText = (TextView) view.findViewById(R.id.self_status_details_nickname_text); mFingerprintText = (TextView) view.findViewById(R.id.self_status_details_fingerprint_text); mMessagesList = (ListView) view.findViewById(R.id.self_status_details_messages_list); mLocationLabel = (TextView) view.findViewById(R.id.self_status_details_location_label); mLocationStreetAddressLabel = (TextView) view .findViewById(R.id.self_status_details_location_street_address_label); mLocationStreetAddressText = (TextView) view .findViewById(R.id.self_status_details_location_street_address_text); mLocationCoordinatesLabel = (TextView) view .findViewById(R.id.self_status_details_location_coordinates_label); mLocationCoordinatesText = (TextView) view.findViewById(R.id.self_status_details_location_coordinates_text); mLocationPrecisionLabel = (TextView) view.findViewById(R.id.self_status_details_location_precision_label); mLocationPrecisionText = (TextView) view.findViewById(R.id.self_status_details_location_precision_text); mLocationTimestampLabel = (TextView) view.findViewById(R.id.self_status_details_location_timestamp_label); mLocationTimestampText = (TextView) view.findViewById(R.id.self_status_details_location_timestamp_text); // TODO: use header/footer of listview instead of hack embedding of listview in scrollview // from: http://stackoverflow.com/questions/4490821/scrollview-inside-scrollview/11554823#11554823 mScrollView.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View view, MotionEvent event) { mMessagesList.requestDisallowInterceptTouchEvent(false); return false; } }); mMessagesList.setOnTouchListener(new View.OnTouchListener() { private float downX, downY; @Override public boolean onTouch(View view, MotionEvent event) { // We want to capture vertical scrolling motions for use by // the messages list, but we don't want to capture horizontal // swiping that should be used to switch tabs. So we're going // to decide based on whether the move looks more X-ish or Y-ish. if (event.getAction() == MotionEvent.ACTION_DOWN) { downX = event.getX(); downY = event.getY(); // Make sure the parent is allowed to intercept. view.getParent().requestDisallowInterceptTouchEvent(false); } else if (event.getAction() == MotionEvent.ACTION_MOVE) { float deltaX = downX - event.getX(); float deltaY = downY - event.getY(); if (Math.abs(deltaY) > Math.abs(deltaX)) { // Looks like a Y-ish scroll attempt. Disallow parent from intercepting. view.getParent().requestDisallowInterceptTouchEvent(true); } } return false; } }); try { mMessageAdapter = new MessageAdapter(getActivity(), MessageAdapter.Mode.SELF_MESSAGES); mMessagesList.setAdapter(mMessageAdapter); } catch (Utils.ApplicationError e) { Log.addEntry(LOG_TAG, "failed to load self messages"); } show(view); // Refresh the message list every 5 seconds. This updates "time ago" displays. // TODO: event driven redrawing? mRefreshUIExecutor = new Utils.FixedDelayExecutor(new Runnable() { @Override public void run() { show(); } }, 5000); Events.register(this); return view; } @Override public void onResume() { super.onResume(); mRefreshUIExecutor.start(); } @Override public void onPause() { super.onPause(); mRefreshUIExecutor.stop(); } @Override public void onDestroyView() { FragmentTransaction transaction = getChildFragmentManager().beginTransaction(); transaction.remove(mFragmentComposeMessage).commitAllowingStateLoss(); Events.unregister(this); super.onDestroyView(); } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); // Note: require explicit result routing for nested fragment if (mFragmentComposeMessage != null) { mFragmentComposeMessage.onActivityResult(requestCode, resultCode, data); } } @Subscribe public void onUpdatedSelf(Events.UpdatedSelf updatedSelf) { show(); } @Subscribe public void onUpdatedSelfStatus(Events.UpdatedSelfStatus updatedSelfStatus) { show(); } private void show() { View view = getView(); if (view == null) { return; } show(view); } private void show(View view) { try { Data data = Data.getInstance(); Data.Self self = data.getSelf(); Data.Status selfStatus = data.getSelfStatus(); // Not using selfStatus.mLocation as it's not updated when location sharing is off // TODO: cleaner API Data.Location selfLocation = data.getCurrentSelfLocation(); Robohash.setRobohashImage(getActivity(), mAvatarImage, true, self.mPublicIdentity); mNicknameText.setText(self.mPublicIdentity.mNickname); mFingerprintText.setText(Utils.formatFingerprint(self.mPublicIdentity.getFingerprint())); // Note: always show message section label and content edit int messageVisibility = (selfStatus.mMessages.size() > 0) ? View.VISIBLE : View.GONE; mMessagesList.setVisibility(messageVisibility); if (mMessageAdapter != null) { mMessageAdapter.updateMessages(); } int locationVisibility = (selfLocation.mTimestamp != null) ? View.VISIBLE : View.GONE; mLocationLabel.setVisibility(locationVisibility); mLocationStreetAddressLabel.setVisibility(locationVisibility); mLocationStreetAddressText.setVisibility(locationVisibility); mLocationCoordinatesLabel.setVisibility(locationVisibility); mLocationCoordinatesText.setVisibility(locationVisibility); mLocationPrecisionLabel.setVisibility(locationVisibility); mLocationPrecisionText.setVisibility(locationVisibility); mLocationTimestampLabel.setVisibility(locationVisibility); mLocationTimestampText.setVisibility(locationVisibility); if (selfLocation.mTimestamp != null) { if (selfLocation.mStreetAddress.length() > 0) { mLocationStreetAddressText.setText(selfLocation.mStreetAddress); } else { mLocationStreetAddressText.setText(R.string.prompt_no_street_address_reported); } mLocationCoordinatesText.setText(getString(R.string.format_status_details_coordinates, selfLocation.mLatitude, selfLocation.mLongitude)); mLocationPrecisionText .setText(getString(R.string.format_status_details_precision, selfLocation.mPrecision)); mLocationTimestampText.setText( Utils.DateFormatter.formatRelativeDatetime(getActivity(), selfLocation.mTimestamp, true)); } } catch (Utils.ApplicationError e) { // TODO: hide identity/message views? Log.addEntry(LOG_TAG, "failed to display self status details"); } } }