Java tutorial
/* * Copyright (C) 2016 Google Inc. All Rights Reserved. * * 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.google.android.apps.santatracker.games; import android.app.UiModeManager; import android.content.Context; import android.content.Intent; import android.content.res.Configuration; import android.graphics.Point; import android.graphics.drawable.Drawable; import android.os.Build; import android.os.Bundle; import android.os.Handler; import android.support.annotation.DrawableRes; import android.support.annotation.StringRes; import android.support.v4.content.ContextCompat; import android.support.v7.app.AppCompatActivity; import android.view.Display; import android.view.Surface; import android.view.View; import android.view.ViewGroup; import android.view.WindowManager; import android.widget.ImageView; import android.widget.TextView; import com.google.android.apps.santatracker.common.R; import com.google.android.apps.santatracker.util.FontHelper; import com.google.android.apps.santatracker.util.ImmersiveModeHelper; /** * Splash screen for games. The splash screen rotates at runtime to match the orientation of the game * that will be launched. This makes launching the splash screen jank-free from any orientation. */ public class SplashActivity extends AppCompatActivity { public static final int DELAY_MILLIS = 1000; private static final String TAG = "SplashActivity"; private static final String EXTRA_SPLASH_IMAGE_ID = "extra_splash_image_id"; private static final String EXTRA_SPLASH_TITLE_ID = "extra_splash_title_id"; private static final String EXTRA_GAME_CLASS = "extra_game_class"; private static final String EXTRA_LANDSCAPE = "extra_landscape"; private Handler mHandler = new Handler(); private Drawable mSplashImage; private String mSplashTitle; /** * Get an intent to launch a splash screen. * @param context launching context. * @param splashImageId resource ID for splash image. * @param splashTitleId resource ID for splash title. * @param isLandscape {@code true} if the game target is landscape only. * @param classToLaunch class of the game to launch. */ public static Intent getIntent(Context context, @DrawableRes int splashImageId, @StringRes int splashTitleId, boolean isLandscape, Class classToLaunch) { Intent intent = new Intent(context, SplashActivity.class); intent.putExtra(EXTRA_SPLASH_IMAGE_ID, splashImageId); intent.putExtra(EXTRA_SPLASH_TITLE_ID, splashTitleId); intent.putExtra(EXTRA_LANDSCAPE, isLandscape); intent.putExtra(EXTRA_GAME_CLASS, classToLaunch); return intent; } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_splash); // Immersive mode (to hide nav). ImmersiveModeHelper.setImmersiveSticky(getWindow()); // Get Views ImageView splashImageView = (ImageView) findViewById(R.id.splash_image); TextView splashTitleView = (TextView) findViewById(R.id.splash_title); // Set Image mSplashImage = ContextCompat.getDrawable(this, getIntent().getIntExtra(EXTRA_SPLASH_IMAGE_ID, -1)); if (mSplashImage != null) { splashImageView.setImageDrawable(mSplashImage); } // Set Title mSplashTitle = getString(getIntent().getIntExtra(EXTRA_SPLASH_TITLE_ID, -1)); splashTitleView.setText(mSplashTitle); // Make text "Lobster" font FontHelper.makeLobster(splashTitleView); // Start new activity in 1000ms final Class classToLaunch = (Class) getIntent().getSerializableExtra(EXTRA_GAME_CLASS); mHandler.postDelayed(new Runnable() { @Override public void run() { startActivity(new Intent(SplashActivity.this, classToLaunch)); finish(); } }, DELAY_MILLIS); } @Override protected void onStart() { super.onStart(); // Orientation boolean gameIsLandscape = getIntent().getBooleanExtra(EXTRA_LANDSCAPE, false); boolean isLandscape = getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE; Display display = ((WindowManager) getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay(); int rotation = display.getRotation(); // Figure out how many degrees to rotate // Landscape always wants to be at 90degrees, portrait always wants to be at 0degrees float degreesToRotate = 0f; if (rotation == Surface.ROTATION_0) { degreesToRotate = gameIsLandscape && !isLandscape ? 90.0f : 0.0f; } else if (rotation == Surface.ROTATION_90) { degreesToRotate = gameIsLandscape && isLandscape ? 0f : -90f; } else if (rotation == Surface.ROTATION_180) { degreesToRotate = gameIsLandscape && !isLandscape ? -90f : -180f; } else if (rotation == Surface.ROTATION_270) { degreesToRotate = gameIsLandscape && isLandscape ? -180f : -270f; } // On a TV, should always be 0 if (isRunningOnTV()) { degreesToRotate = 0f; } // Rotate, if necessary if (degreesToRotate != 0) { Point size = new Point(); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) { display.getRealSize(size); } else { display.getSize(size); } int w = size.x; int h = size.y; View mainLayout = findViewById(R.id.splash_layout); mainLayout.setRotation(degreesToRotate); mainLayout.setTranslationX((w - h) / 2); mainLayout.setTranslationY((h - w) / 2); ViewGroup.LayoutParams lp = mainLayout.getLayoutParams(); lp.height = w; lp.width = h; mainLayout.requestLayout(); } } private boolean isRunningOnTV() { UiModeManager uiModeManager = (UiModeManager) getSystemService(UI_MODE_SERVICE); return uiModeManager.getCurrentModeType() == Configuration.UI_MODE_TYPE_TELEVISION; } @Override protected void onStop() { super.onStop(); mHandler.removeCallbacksAndMessages(null); } }