Java tutorial
/* * Copyright (C) 2014 The Android Open Source Project * * 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 com.android.tv.leanback; import android.content.Intent; import android.graphics.Color; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.os.Handler; import android.support.v17.leanback.app.BackgroundManager; import android.support.v17.leanback.app.BrowseFragment; import android.support.v17.leanback.widget.ArrayObjectAdapter; import android.support.v17.leanback.widget.HeaderItem; import android.support.v17.leanback.widget.ImageCardView; import android.support.v17.leanback.widget.ListRow; import android.support.v17.leanback.widget.ListRowPresenter; import android.support.v17.leanback.widget.OnItemViewClickedListener; import android.support.v17.leanback.widget.OnItemViewSelectedListener; import android.support.v17.leanback.widget.Presenter; import android.support.v17.leanback.widget.Row; import android.support.v17.leanback.widget.RowPresenter; import android.support.v4.app.ActivityOptionsCompat; import android.util.DisplayMetrics; import android.util.Log; import android.view.Gravity; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import android.widget.Toast; import com.android.tv.R; import com.bumptech.glide.Glide; import com.bumptech.glide.load.resource.drawable.GlideDrawable; import com.bumptech.glide.request.animation.GlideAnimation; import com.bumptech.glide.request.target.SimpleTarget; import java.net.URI; import java.util.Collections; import java.util.List; import java.util.Timer; import java.util.TimerTask; public class MainFragment extends BrowseFragment { private static final String TAG = "MainFragment"; private static final int BACKGROUND_UPDATE_DELAY = 300; private static final int GRID_ITEM_WIDTH = 200; private static final int GRID_ITEM_HEIGHT = 200; private static final int NUM_ROWS = 6; private static final int NUM_COLS = 15; private final Handler mHandler = new Handler(); private ArrayObjectAdapter mRowsAdapter; private Drawable mDefaultBackground; private DisplayMetrics mMetrics; private Timer mBackgroundTimer; private URI mBackgroundURI; private BackgroundManager mBackgroundManager; TextView myView; @Override public void onActivityCreated(Bundle savedInstanceState) { Log.i(TAG, "onCreate"); super.onActivityCreated(savedInstanceState); prepareBackgroundManager(); setupUIElements(); loadRows(); setupEventListeners(); } @Override public void onDestroy() { super.onDestroy(); if (null != mBackgroundTimer) { Log.d(TAG, "onDestroy: " + mBackgroundTimer.toString()); mBackgroundTimer.cancel(); } } private void loadRows() { List<Movie> list = MovieList.setupMovies(); mRowsAdapter = new ArrayObjectAdapter(new ListRowPresenter()); CardPresenter cardPresenter = new CardPresenter(); int i; for (i = 0; i < NUM_ROWS; i++) { if (i != 0) { Collections.shuffle(list); } ArrayObjectAdapter listRowAdapter = new ArrayObjectAdapter(cardPresenter); for (int j = 0; j < NUM_COLS; j++) { listRowAdapter.add(list.get(j % 5)); } HeaderItem header = new HeaderItem(i, MovieList.MOVIE_CATEGORY[i]); mRowsAdapter.add(new ListRow(header, listRowAdapter)); } HeaderItem gridHeader = new HeaderItem(i, ""); GridItemPresenter mGridPresenter = new GridItemPresenter(); ArrayObjectAdapter gridRowAdapter = new ArrayObjectAdapter(mGridPresenter); gridRowAdapter.add(getResources().getString(R.string.grid_view)); gridRowAdapter.add(getString(R.string.error_fragment)); gridRowAdapter.add(getResources().getString(R.string.personal_settings)); myView = new MyTestView(getActivity().getBaseContext()); /*myView.setText("dsdsds"); gridRowAdapter.add(myView);*/ mRowsAdapter.add(new ListRow(gridHeader, gridRowAdapter)); setAdapter(mRowsAdapter); } private void prepareBackgroundManager() { mBackgroundManager = BackgroundManager.getInstance(getActivity()); mBackgroundManager.attach(getActivity().getWindow()); mDefaultBackground = getResources().getDrawable(R.drawable.default_background); mMetrics = new DisplayMetrics(); getActivity().getWindowManager().getDefaultDisplay().getMetrics(mMetrics); } private void setupUIElements() { // setBadgeDrawable(getActivity().getResources().getDrawable( // R.drawable.videos_by_google_banner)); setTitle(getString(R.string.browse_title)); // Badge, when set, takes precedent // over title setHeadersState(HEADERS_ENABLED); setHeadersTransitionOnBackEnabled(true); // set fastLane (or headers) background color setBrandColor(getResources().getColor(R.color.fastlane_background)); // set search icon color setSearchAffordanceColor(getResources().getColor(R.color.search_opaque)); } private void setupEventListeners() { setOnSearchClickedListener(new View.OnClickListener() { @Override public void onClick(View view) { Toast.makeText(getActivity(), "? /Implement your own in-app search", Toast.LENGTH_LONG).show(); } }); setOnItemViewClickedListener(new ItemViewClickedListener()); setOnItemViewSelectedListener(new ItemViewSelectedListener()); } protected void updateBackground(String uri) { int width = mMetrics.widthPixels; int height = mMetrics.heightPixels; Glide.with(getActivity()).load(uri).centerCrop().error(mDefaultBackground) .into(new SimpleTarget<GlideDrawable>(width, height) { @Override public void onResourceReady(GlideDrawable resource, GlideAnimation<? super GlideDrawable> glideAnimation) { mBackgroundManager.setDrawable(resource); } }); mBackgroundTimer.cancel(); } private void startBackgroundTimer() { if (null != mBackgroundTimer) { mBackgroundTimer.cancel(); } mBackgroundTimer = new Timer(); mBackgroundTimer.schedule(new UpdateBackgroundTask(), BACKGROUND_UPDATE_DELAY); } private final class ItemViewClickedListener implements OnItemViewClickedListener { @Override public void onItemClicked(Presenter.ViewHolder itemViewHolder, Object item, RowPresenter.ViewHolder rowViewHolder, Row row) { if (item instanceof Movie) { Movie movie = (Movie) item; Log.d(TAG, "Item: " + item.toString()); Intent intent = new Intent(getActivity(), DetailsActivity.class); intent.putExtra(DetailsActivity.MOVIE, movie); Bundle bundle = ActivityOptionsCompat.makeSceneTransitionAnimation(getActivity(), ((ImageCardView) itemViewHolder.view).getMainImageView(), DetailsActivity.SHARED_ELEMENT_NAME).toBundle(); getActivity().startActivity(intent, bundle); } else if (item instanceof String) { if (((String) item).indexOf(getString(R.string.error_fragment)) >= 0) { Intent intent = new Intent(getActivity(), BrowseErrorActivity.class); startActivity(intent); //myView.invalidate(); } else { // myView.requestLayout(); Toast.makeText(getActivity(), ((String) item), Toast.LENGTH_SHORT).show(); } } } } private final class ItemViewSelectedListener implements OnItemViewSelectedListener { @Override public void onItemSelected(Presenter.ViewHolder itemViewHolder, Object item, RowPresenter.ViewHolder rowViewHolder, Row row) { if (item instanceof Movie) { mBackgroundURI = ((Movie) item).getBackgroundImageURI(); startBackgroundTimer(); } } } private class UpdateBackgroundTask extends TimerTask { @Override public void run() { mHandler.post(new Runnable() { @Override public void run() { if (mBackgroundURI != null) { updateBackground(mBackgroundURI.toString()); } } }); } } private class GridItemPresenter extends Presenter { @Override public ViewHolder onCreateViewHolder(ViewGroup parent) { TextView view = new TextView(parent.getContext()); view.setLayoutParams(new ViewGroup.LayoutParams(GRID_ITEM_WIDTH, GRID_ITEM_HEIGHT)); view.setFocusable(true); view.setFocusableInTouchMode(true); view.setBackgroundColor(getResources().getColor(R.color.default_background)); view.setTextColor(Color.WHITE); view.setGravity(Gravity.CENTER); return new ViewHolder(view); } @Override public void onBindViewHolder(ViewHolder viewHolder, Object item) { ((TextView) viewHolder.view).setText((String) item); } @Override public void onUnbindViewHolder(ViewHolder viewHolder) { } } }