Screensaver.java revision 1b3cc5b1442bae15439aef3c7d1929ebba417561 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.deskclock;
18
19import android.animation.Animator;
20import android.animation.AnimatorSet;
21import android.animation.ObjectAnimator;
22import android.animation.TimeInterpolator;
23import android.content.SharedPreferences;
24import android.content.res.Configuration;
25import android.graphics.Color;
26import android.graphics.Paint;
27import android.graphics.PorterDuff;
28import android.graphics.PorterDuffColorFilter;
29import android.os.Handler;
30import android.preference.PreferenceManager;
31import android.service.dreams.DreamService;
32import android.util.Log;
33import android.view.View;
34import android.view.animation.AccelerateInterpolator;
35import android.view.animation.DecelerateInterpolator;
36
37public class Screensaver extends DreamService {
38    static final boolean DEBUG = false;
39    static final String TAG = "DeskClock/Screensaver";
40
41    static final long MOVE_DELAY = 60000; // DeskClock.SCREEN_SAVER_MOVE_DELAY;
42    static final long SLIDE_TIME = 10000;
43    static final long FADE_TIME = 3000;
44
45    static final boolean SLIDE = false;
46
47    private View mContentView, mSaverView;
48    private View mAnalogClock, mDigitalClock;
49
50    private static TimeInterpolator mSlowStartWithBrakes =
51        new TimeInterpolator() {
52            @Override
53            public float getInterpolation(float x) {
54                return (float)(Math.cos((Math.pow(x,3) + 1) * Math.PI) / 2.0f) + 0.5f;
55            }
56        };
57
58    private final Handler mHandler = new Handler();
59
60
61    private final Runnable mMoveSaverRunnable = new Runnable() {
62        @Override
63        public void run() {
64            long delay = MOVE_DELAY;
65
66            if (DEBUG) Log.d(TAG,
67                    String.format("mContentView=(%d x %d) container=(%d x %d)",
68                        mContentView.getWidth(), mContentView.getHeight(),
69                        mSaverView.getWidth(), mSaverView.getHeight()
70                        ));
71            final float xrange = mContentView.getWidth() - mSaverView.getWidth();
72            final float yrange = mContentView.getHeight() - mSaverView.getHeight();
73
74            if (xrange == 0 && yrange == 0) {
75                delay = 500; // back in a split second
76            } else {
77                final int nextx = (int) (Math.random() * xrange);
78                final int nexty = (int) (Math.random() * yrange);
79
80                if (mSaverView.getAlpha() == 0f) {
81                    // jump right there
82                    mSaverView.setX(nextx);
83                    mSaverView.setY(nexty);
84                    ObjectAnimator.ofFloat(mSaverView, "alpha", 0f, 1f)
85                        .setDuration(FADE_TIME)
86                        .start();
87                } else {
88                    AnimatorSet s = new AnimatorSet();
89                    Animator xMove   = ObjectAnimator.ofFloat(mSaverView,
90                                         "x", mSaverView.getX(), nextx);
91                    Animator yMove   = ObjectAnimator.ofFloat(mSaverView,
92                                         "y", mSaverView.getY(), nexty);
93
94                    Animator xShrink = ObjectAnimator.ofFloat(mSaverView, "scaleX", 1f, 0.85f);
95                    Animator xGrow   = ObjectAnimator.ofFloat(mSaverView, "scaleX", 0.85f, 1f);
96
97                    Animator yShrink = ObjectAnimator.ofFloat(mSaverView, "scaleY", 1f, 0.85f);
98                    Animator yGrow   = ObjectAnimator.ofFloat(mSaverView, "scaleY", 0.85f, 1f);
99                    AnimatorSet shrink = new AnimatorSet(); shrink.play(xShrink).with(yShrink);
100                    AnimatorSet grow = new AnimatorSet(); grow.play(xGrow).with(yGrow);
101
102                    Animator fadeout = ObjectAnimator.ofFloat(mSaverView, "alpha", 1f, 0f);
103                    Animator fadein = ObjectAnimator.ofFloat(mSaverView, "alpha", 0f, 1f);
104
105
106                    if (SLIDE) {
107                        s.play(xMove).with(yMove);
108                        s.setDuration(SLIDE_TIME);
109
110                        s.play(shrink.setDuration(SLIDE_TIME/2));
111                        s.play(grow.setDuration(SLIDE_TIME/2)).after(shrink);
112                        s.setInterpolator(mSlowStartWithBrakes);
113                    } else {
114                        AccelerateInterpolator accel = new AccelerateInterpolator();
115                        DecelerateInterpolator decel = new DecelerateInterpolator();
116
117                        shrink.setDuration(FADE_TIME).setInterpolator(accel);
118                        fadeout.setDuration(FADE_TIME).setInterpolator(accel);
119                        grow.setDuration(FADE_TIME).setInterpolator(decel);
120                        fadein.setDuration(FADE_TIME).setInterpolator(decel);
121                        s.play(shrink);
122                        s.play(fadeout);
123                        s.play(xMove.setDuration(0)).after(FADE_TIME);
124                        s.play(yMove.setDuration(0)).after(FADE_TIME);
125                        s.play(fadein).after(FADE_TIME);
126                        s.play(grow).after(FADE_TIME);
127                    }
128                    s.start();
129                }
130
131                long now = System.currentTimeMillis();
132                long adjust = (now % 60000);
133                delay = delay
134                        + (MOVE_DELAY - adjust) // minute aligned
135                        - (SLIDE ? 0 : FADE_TIME) // start moving before the fade
136                        ;
137                if (DEBUG) Log.d(TAG,
138                        "will move again in " + delay + " now=" + now + " adjusted by " + adjust);
139            }
140
141            mHandler.removeCallbacks(this);
142            mHandler.postDelayed(this, delay);
143        }
144    };
145
146    public Screensaver() {
147        if (DEBUG) Log.d(TAG, "Screensaver allocated");
148    }
149
150    @Override
151    public void onCreate() {
152        if (DEBUG) Log.d(TAG, "Screensaver created");
153        super.onCreate();
154    }
155
156    @Override
157    public void onConfigurationChanged(Configuration newConfig) {
158        if (DEBUG) Log.d(TAG, "Screensaver configuration changed");
159        super.onConfigurationChanged(newConfig);
160        mHandler.removeCallbacks(mMoveSaverRunnable);
161        layoutClockSaver();
162        mHandler.post(mMoveSaverRunnable);
163    }
164
165    @Override
166    public void onAttachedToWindow() {
167        if (DEBUG) Log.d(TAG, "Screensaver attached to window");
168        super.onAttachedToWindow();
169
170        // We want the screen saver to exit upon user interaction.
171        setInteractive(false);
172
173        setFullscreen(true);
174
175        layoutClockSaver();
176
177        mHandler.post(mMoveSaverRunnable);
178    }
179
180    @Override
181    public void onDetachedFromWindow() {
182        if (DEBUG) Log.d(TAG, "Screensaver detached from window");
183        super.onDetachedFromWindow();
184
185        mHandler.removeCallbacks(mMoveSaverRunnable);
186    }
187
188    private void setClockStyle() {
189        SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
190        String style = sharedPref.getString(ScreensaverSettingsActivity.KEY_CLOCK_STYLE, "analog");
191        if (style.equals("analog")) {
192            mDigitalClock.setVisibility(View.GONE);
193            mAnalogClock.setVisibility(View.VISIBLE);
194            mSaverView = mAnalogClock;
195        } else {
196            mDigitalClock.setVisibility(View.VISIBLE);
197            mAnalogClock.setVisibility(View.GONE);
198            mSaverView = mDigitalClock;
199        }
200        boolean night = sharedPref.getBoolean(ScreensaverSettingsActivity.KEY_NIGHT_MODE, false);
201
202        Paint paint = new Paint();
203        paint.setColor(Color.WHITE);
204        paint.setColorFilter(new PorterDuffColorFilter(
205                        (night ? 0x60FFFFFF : 0xC0FFFFFF),
206                PorterDuff.Mode.MULTIPLY));
207        mSaverView.setLayerType(View.LAYER_TYPE_HARDWARE, paint);
208
209        setScreenBright(!night);
210    }
211
212    private void layoutClockSaver() {
213        setContentView(R.layout.desk_clock_saver);
214        mDigitalClock = findViewById(R.id.digital_clock);
215        mAnalogClock =findViewById(R.id.analog_clock);
216        setClockStyle();
217        mContentView = (View) mSaverView.getParent();
218        mSaverView.setAlpha(0);
219    }
220}
221