Java tutorial
/* * Twidere - Twitter client for Android * * Copyright (C) 2012-2015 Mariotaku Lee <mariotaku.lee@gmail.com> * * 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 org.mariotaku.twidere.fragment.support.card; import android.content.Context; import android.graphics.Canvas; import android.graphics.ColorFilter; import android.graphics.Paint; import android.graphics.PixelFormat; import android.graphics.Rect; import android.graphics.RectF; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.support.annotation.NonNull; import android.support.annotation.Nullable; import android.support.v4.app.LoaderManager; import android.support.v4.content.AsyncTaskLoader; import android.support.v4.content.ContextCompat; import android.support.v4.content.Loader; import android.text.TextUtils; import android.text.format.DateUtils; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.RadioButton; import android.widget.TableLayout; import android.widget.TextView; import com.desmond.asyncmanager.AsyncManager; import com.desmond.asyncmanager.TaskRunnable; import org.apache.commons.lang3.math.NumberUtils; import org.mariotaku.twidere.R; import org.mariotaku.twidere.api.twitter.TwitterCaps; import org.mariotaku.twidere.api.twitter.TwitterException; import org.mariotaku.twidere.api.twitter.model.CardDataMap; import org.mariotaku.twidere.api.twitter.model.CardEntity; import org.mariotaku.twidere.fragment.support.BaseSupportFragment; import org.mariotaku.twidere.model.ParcelableCardEntity; import org.mariotaku.twidere.model.ParcelableStatus; import org.mariotaku.twidere.util.TwitterAPIFactory; import org.mariotaku.twidere.util.support.ViewSupport; import java.util.Date; import java.util.regex.Matcher; import java.util.regex.Pattern; /** * Created by mariotaku on 15/12/20. */ public class CardPollFragment extends BaseSupportFragment implements LoaderManager.LoaderCallbacks<ParcelableCardEntity>, View.OnClickListener { public static final Pattern PATTERN_POLL_TEXT_ONLY = Pattern.compile("poll([\\d]+)choice_text_only"); private TableLayout mPollContainer; private TextView mPollSummary; private ParcelableCardEntity mCard; public static CardPollFragment show(ParcelableStatus status) { final CardPollFragment fragment = new CardPollFragment(); final Bundle args = new Bundle(); args.putParcelable(EXTRA_STATUS, status); args.putParcelable(EXTRA_CARD, status.card); fragment.setArguments(args); return fragment; } public static boolean isPoll(@NonNull ParcelableCardEntity card) { return PATTERN_POLL_TEXT_ONLY.matcher(card.name).matches() && !TextUtils.isEmpty(card.url); } @Override public void onActivityCreated(@Nullable Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); initChoiceView(savedInstanceState); getLoaderManager().initLoader(0, null, this); } @Override public void onBaseViewCreated(View view, Bundle savedInstanceState) { super.onBaseViewCreated(view, savedInstanceState); mPollContainer = (TableLayout) view.findViewById(R.id.poll_container); mPollSummary = (TextView) view.findViewById(R.id.poll_summary); } @Nullable @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.fragment_card_poll, container, false); } @Override protected void fitSystemWindows(Rect insets) { // No-op } private void initChoiceView(@Nullable Bundle savedInstanceState) { final ParcelableCardEntity card = getCard(); final ParcelableStatus status = getStatus(); final int choicesCount = getChoicesCount(card); final LayoutInflater inflater = getLayoutInflater(savedInstanceState); for (int i = 0; i < choicesCount; i++) { inflater.inflate(R.layout.layout_poll_item, mPollContainer, true); } displayPoll(card, status); } private void displayPoll(final ParcelableCardEntity card, final ParcelableStatus status) { if (card == null || status == null) return; mCard = card; final int choicesCount = getChoicesCount(card); int votesSum = 0; final boolean countsAreFinal = card.getAsBoolean("counts_are_final", false); final int selectedChoice = card.getAsInteger("selected_choice", -1); final Date endDatetimeUtc = card.getAsDate("end_datetime_utc", new Date()); final boolean hasChoice = selectedChoice != -1; final boolean isMyPoll = status.account_id == status.user_id; final boolean showResult = countsAreFinal || isMyPoll || hasChoice; for (int i = 0; i < choicesCount; i++) { final int choiceIndex = i + 1; votesSum += card.getAsInteger("choice" + choiceIndex + "_count", 0); } final View.OnClickListener clickListener = new View.OnClickListener() { private boolean clickedChoice; @Override public void onClick(View v) { if (hasChoice || clickedChoice) return; for (int i = 0, j = mPollContainer.getChildCount(); i < j; i++) { final View pollItem = mPollContainer.getChildAt(i); pollItem.setClickable(false); clickedChoice = true; final RadioButton choiceRadioButton = (RadioButton) pollItem.findViewById(R.id.choice_button); final boolean checked = v == pollItem; choiceRadioButton.setChecked(checked); if (checked) { final CardDataMap cardData = new CardDataMap(); cardData.putLong("original_tweet_id", status.id); cardData.putString("card_uri", card.url); cardData.putString("cards_platform", TwitterAPIFactory.CARDS_PLATFORM_ANDROID_12); cardData.putString("response_card_name", card.name); cardData.putString("selected_choice", String.valueOf(i + 1)); TaskRunnable<CardDataMap, ParcelableCardEntity, CardPollFragment> task = new TaskRunnable<CardDataMap, ParcelableCardEntity, CardPollFragment>() { @Override public void callback(CardPollFragment handler, ParcelableCardEntity result) { handler.displayPoll(result, status); } @Override public ParcelableCardEntity doLongOperation(CardDataMap cardDataMap) throws InterruptedException { final TwitterCaps caps = TwitterAPIFactory.getTwitterInstance(getContext(), card.account_id, true, true, TwitterCaps.class); if (caps == null) return null; try { final CardEntity cardEntity = caps.sendPassThrough(cardDataMap).getCard(); return ParcelableCardEntity.fromCardEntity(cardEntity, card.account_id); } catch (TwitterException e) { Log.w(LOGTAG, e); } return null; } }; task.setParams(cardData); AsyncManager.runBackgroundTask(task); } } } }; final int color = ContextCompat.getColor(getContext(), R.color.material_light_blue_a200); final float radius = getResources().getDimension(R.dimen.element_spacing_small); for (int i = 0; i < choicesCount; i++) { final View pollItem = mPollContainer.getChildAt(i); final TextView choicePercentView = (TextView) pollItem.findViewById(R.id.choice_percent); final TextView choiceLabelView = (TextView) pollItem.findViewById(R.id.choice_label); final RadioButton choiceRadioButton = (RadioButton) pollItem.findViewById(R.id.choice_button); final int choiceIndex = i + 1; final String label = card.getAsString("choice" + choiceIndex + "_label", null); final int value = card.getAsInteger("choice" + choiceIndex + "_count", 0); if (label == null) throw new NullPointerException(); final float choicePercent = votesSum == 0 ? 0 : value / (float) votesSum; choiceLabelView.setText(label); choicePercentView.setText(String.format("%d%%", Math.round(choicePercent * 100))); pollItem.setOnClickListener(clickListener); final boolean isSelected = selectedChoice == choiceIndex; if (showResult) { choicePercentView.setVisibility(View.VISIBLE); choiceRadioButton.setVisibility(hasChoice && isSelected ? View.VISIBLE : View.INVISIBLE); ViewSupport.setBackground(choiceLabelView, new PercentDrawable(choicePercent, radius, color)); } else { choicePercentView.setVisibility(View.GONE); choiceRadioButton.setVisibility(View.VISIBLE); ViewSupport.setBackground(choiceLabelView, null); } choiceRadioButton.setChecked(isSelected); pollItem.setClickable(selectedChoice == -1); } final String nVotes = getResources().getQuantityString(R.plurals.N_votes, votesSum, votesSum); final CharSequence timeLeft = DateUtils.getRelativeTimeSpanString(getContext(), endDatetimeUtc.getTime(), true); mPollSummary.setText(getString(R.string.poll_summary_format, nVotes, timeLeft)); } private int getChoicesCount(ParcelableCardEntity card) { final Matcher matcher = PATTERN_POLL_TEXT_ONLY.matcher(card.name); if (!matcher.matches()) throw new IllegalStateException(); return NumberUtils.toInt(matcher.group(1)); } @NonNull private ParcelableCardEntity getCard() { if (mCard != null) return mCard; final ParcelableCardEntity card = getArguments().getParcelable(EXTRA_CARD); assert card != null && card.name != null; return card; } private ParcelableStatus getStatus() { return getArguments().getParcelable(EXTRA_STATUS); } @Override public void onClick(View v) { } @Override public Loader<ParcelableCardEntity> onCreateLoader(int id, Bundle args) { final ParcelableCardEntity card = getCard(); return new ParcelableCardEntityLoader(getContext(), card.account_id, card.url, card.name); } @Override public void onLoadFinished(Loader<ParcelableCardEntity> loader, ParcelableCardEntity data) { if (data == null) return; displayPoll(data, getStatus()); } @Override public void onLoaderReset(Loader<ParcelableCardEntity> loader) { } private static class PercentDrawable extends Drawable { private final Paint mPaint; private final RectF mBounds; private final float mPercent; private final float mRadius; PercentDrawable(float percent, float radius, int color) { mPercent = percent; mRadius = radius; mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mPaint.setColor(color); mBounds = new RectF(); } @Override public void draw(Canvas canvas) { canvas.drawRoundRect(mBounds, mRadius, mRadius, mPaint); } @Override protected void onBoundsChange(Rect bounds) { mBounds.set(bounds); mBounds.right = mBounds.left + mBounds.width() * mPercent; super.onBoundsChange(bounds); } @Override public void setAlpha(int alpha) { } @Override public void setColorFilter(ColorFilter colorFilter) { } @Override public int getOpacity() { return PixelFormat.TRANSLUCENT; } } public static class ParcelableCardEntityLoader extends AsyncTaskLoader<ParcelableCardEntity> { private final long mAccountId; private final String mCardUri; private final String mCardName; public ParcelableCardEntityLoader(Context context, long accountId, String cardUri, String cardName) { super(context); mAccountId = accountId; mCardUri = cardUri; mCardName = cardName; } @Override public ParcelableCardEntity loadInBackground() { final TwitterCaps caps = TwitterAPIFactory.getTwitterInstance(getContext(), mAccountId, true, true, TwitterCaps.class); if (caps == null) return null; try { final CardDataMap params = new CardDataMap(); params.putString("card_uri", mCardUri); params.putString("cards_platform", TwitterAPIFactory.CARDS_PLATFORM_ANDROID_12); params.putString("response_card_name", mCardName); final CardEntity card = caps.getPassThrough(params).getCard(); if (card == null || card.getName() == null) { return null; } final ParcelableCardEntity parcelableCard = ParcelableCardEntity.fromCardEntity(card, mAccountId); return parcelableCard; } catch (TwitterException e) { return null; } } @Override protected void onStartLoading() { forceLoad(); } } }