ImmersiveModeConfirmation.java revision a953b6d968beba01baad095b9ed2e40dbb97f189 
1/*
2 * Copyright (C) 2013 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.internal.policy.impl;
18
19import android.animation.Animator;
20import android.animation.ArgbEvaluator;
21import android.animation.ValueAnimator;
22import android.app.ActivityManager;
23import android.content.Context;
24import android.graphics.PixelFormat;
25import android.graphics.drawable.ColorDrawable;
26import android.os.Handler;
27import android.os.Message;
28import android.os.UserHandle;
29import android.provider.Settings;
30import android.text.TextUtils;
31import android.util.ArraySet;
32import android.util.DisplayMetrics;
33import android.util.Slog;
34import android.view.Gravity;
35import android.view.MotionEvent;
36import android.view.View;
37import android.view.ViewGroup;
38import android.view.WindowManager;
39import android.view.animation.Animation;
40import android.view.animation.AnimationUtils;
41import android.view.animation.DecelerateInterpolator;
42import android.widget.Button;
43import android.widget.FrameLayout;
44
45import com.android.internal.R;
46
47import java.util.Arrays;
48
49/**
50 *  Helper to manage showing/hiding a confirmation prompt when the transient navigation bar
51 *  is hidden.
52 */
53public class TransientNavigationConfirmation {
54    private static final String TAG = "TransientNavigationConfirmation";
55    private static final boolean DEBUG = false;
56    private static final boolean DEBUG_SHOW_EVERY_TIME = false; // super annoying, use with caution
57
58    private final Context mContext;
59    private final H mHandler;
60    private final ArraySet<String> mConfirmedPackages = new ArraySet<String>();
61    private final long mShowDelayMs;
62    private final long mPanicThresholdMs;
63
64    private ClingWindowView mClingWindow;
65    private String mLastPackage;
66    private String mPromptPackage;
67    private long mPanicTime;
68    private String mPanicPackage;
69    private WindowManager mWindowManager;
70
71    public TransientNavigationConfirmation(Context context) {
72        mContext = context;
73        mHandler = new H();
74        mShowDelayMs = getNavBarExitDuration() * 3;
75        mPanicThresholdMs = context.getResources()
76                .getInteger(R.integer.config_transient_navigation_confirmation_panic);
77        mWindowManager = (WindowManager)
78                mContext.getSystemService(Context.WINDOW_SERVICE);
79    }
80
81    private long getNavBarExitDuration() {
82        Animation exit = AnimationUtils.loadAnimation(mContext, R.anim.dock_bottom_exit);
83        return exit != null ? exit.getDuration() : 0;
84    }
85
86    public void loadSetting() {
87        if (DEBUG) Slog.d(TAG, "loadSetting()");
88        mConfirmedPackages.clear();
89        String packages = null;
90        try {
91            packages = Settings.Secure.getStringForUser(mContext.getContentResolver(),
92                    Settings.Secure.TRANSIENT_NAV_CONFIRMATIONS,
93                    UserHandle.USER_CURRENT);
94            if (packages != null) {
95                mConfirmedPackages.addAll(Arrays.asList(packages.split(",")));
96                if (DEBUG) Slog.d(TAG, "Loaded mConfirmedPackages=" + mConfirmedPackages);
97            }
98        } catch (Throwable t) {
99            Slog.w(TAG, "Error loading confirmations, packages=" + packages, t);
100        }
101    }
102
103    private void saveSetting() {
104        if (DEBUG) Slog.d(TAG, "saveSetting()");
105        try {
106            final String packages = TextUtils.join(",", mConfirmedPackages);
107            Settings.Secure.putStringForUser(mContext.getContentResolver(),
108                    Settings.Secure.TRANSIENT_NAV_CONFIRMATIONS,
109                    packages,
110                    UserHandle.USER_CURRENT);
111            if (DEBUG) Slog.d(TAG, "Saved packages=" + packages);
112        } catch (Throwable t) {
113            Slog.w(TAG, "Error saving confirmations, mConfirmedPackages=" + mConfirmedPackages, t);
114        }
115    }
116
117    public void transientNavigationChanged(String pkg, boolean isNavTransient) {
118        if (pkg == null) {
119            return;
120        }
121        mHandler.removeMessages(H.SHOW);
122        if (isNavTransient) {
123            mLastPackage = pkg;
124            if (DEBUG_SHOW_EVERY_TIME || !mConfirmedPackages.contains(pkg)) {
125                mHandler.sendMessageDelayed(mHandler.obtainMessage(H.SHOW, pkg), mShowDelayMs);
126            }
127        } else {
128            mLastPackage = null;
129            mHandler.sendEmptyMessage(H.HIDE);
130        }
131    }
132
133    public void onPowerKeyDown(boolean isScreenOn, long time, boolean transientNavigationAllowed) {
134        if (mPanicPackage != null && !isScreenOn && (time - mPanicTime < mPanicThresholdMs)) {
135            // turning the screen back on within the panic threshold
136            unconfirmPackage(mPanicPackage);
137        }
138        if (isScreenOn && transientNavigationAllowed) {
139            // turning the screen off, remember if we were hiding the transient nav
140            mPanicTime = time;
141            mPanicPackage = mLastPackage;
142        } else {
143            mPanicTime = 0;
144            mPanicPackage = null;
145        }
146    }
147
148    public void confirmCurrentPrompt() {
149        mHandler.post(confirmAction(mPromptPackage));
150    }
151
152    private void unconfirmPackage(String pkg) {
153        if (pkg != null) {
154            if (DEBUG) Slog.d(TAG, "Unconfirming transient navigation for " + pkg);
155            mConfirmedPackages.remove(pkg);
156            saveSetting();
157        }
158    }
159
160    private void handleHide() {
161        if (mClingWindow != null) {
162            if (DEBUG) Slog.d(TAG,
163                    "Hiding transient navigation confirmation for " + mPromptPackage);
164            mWindowManager.removeView(mClingWindow);
165            mClingWindow = null;
166        }
167    }
168
169    private class ClingWindowView extends FrameLayout {
170        private static final int BGCOLOR = 0x80000000;
171        private static final int OFFSET_DP = 48;
172
173        private final ColorDrawable mColor = new ColorDrawable(0);
174        private ValueAnimator mColorAnim;
175
176        public ClingWindowView(Context context) {
177            super(context);
178            setClickable(true);
179            setBackground(mColor);
180        }
181
182        @Override
183        public void onAttachedToWindow() {
184            super.onAttachedToWindow();
185
186            DisplayMetrics metrics = new DisplayMetrics();
187            mWindowManager.getDefaultDisplay().getMetrics(metrics);
188            float density = metrics.density;
189
190            // create the confirmation cling
191            final ViewGroup clingLayout = (ViewGroup)
192                    View.inflate(getContext(), R.layout.transient_navigation_cling, null);
193
194            final Button ok = (Button) clingLayout.findViewById(R.id.ok);
195            ok.setOnClickListener(new OnClickListener() {
196                @Override
197                public void onClick(View v) {
198                    handleHide();
199                }
200            });
201            addView(clingLayout, new FrameLayout.LayoutParams(
202                    FrameLayout.LayoutParams.MATCH_PARENT,
203                    FrameLayout.LayoutParams.WRAP_CONTENT
204            ));
205
206            if (ActivityManager.isHighEndGfx()) {
207                final View bubble = clingLayout.findViewById(R.id.text);
208                bubble.setAlpha(0f);
209                bubble.setTranslationY(-OFFSET_DP*density);
210                bubble.animate()
211                        .alpha(1f)
212                        .translationY(0)
213                        .setDuration(300)
214                        .setInterpolator(new DecelerateInterpolator())
215                        .start();
216
217                ok.setAlpha(0f);
218                ok.setTranslationY(-OFFSET_DP*density);
219                ok.animate().alpha(1f)
220                        .translationY(0)
221                        .setDuration(300)
222                        .setStartDelay(200)
223                        .setInterpolator(new DecelerateInterpolator())
224                        .start();
225
226                mColorAnim = ValueAnimator.ofObject(new ArgbEvaluator(), 0, BGCOLOR);
227                mColorAnim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
228                    @Override
229                    public void onAnimationUpdate(ValueAnimator animation) {
230                        final int c = (Integer) animation.getAnimatedValue();
231                        mColor.setColor(c);
232                    }
233                });
234                mColorAnim.setDuration(1000);
235                mColorAnim.start();
236            } else {
237                mColor.setColor(BGCOLOR);
238            }
239        }
240
241        @Override
242        public boolean onTouchEvent(MotionEvent motion) {
243            Slog.v(TAG, "ClingWindowView.onTouchEvent");
244            return true;
245        }
246    }
247
248    private void handleShow(String pkg) {
249        mPromptPackage = pkg;
250        if (DEBUG) Slog.d(TAG, "Showing transient navigation confirmation for " + pkg);
251
252        mClingWindow = new ClingWindowView(mContext);
253
254        // we will be hiding the nav bar, so layout as if it's already hidden
255        mClingWindow.setSystemUiVisibility(
256                View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
257              | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
258
259        // show the confirmation
260        WindowManager.LayoutParams lp = new WindowManager.LayoutParams(
261                ViewGroup.LayoutParams.MATCH_PARENT,
262                ViewGroup.LayoutParams.MATCH_PARENT,
263                WindowManager.LayoutParams.TYPE_TOAST,
264                0
265                        | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
266                        | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
267                        | WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED
268                ,
269                PixelFormat.TRANSLUCENT);
270        lp.setTitle("TransientNavigationConfirmation");
271        lp.windowAnimations = com.android.internal.R.style.Animation_RecentApplications;
272        lp.gravity = Gravity.FILL;
273        mWindowManager.addView(mClingWindow, lp);
274    }
275
276    private Runnable confirmAction(final String pkg) {
277        return new Runnable() {
278            @Override
279            public void run() {
280                if (pkg != null && !mConfirmedPackages.contains(pkg)) {
281                    if (DEBUG) Slog.d(TAG, "Confirming transient navigation for " + pkg);
282                    mConfirmedPackages.add(pkg);
283                    saveSetting();
284                }
285                handleHide();
286            }
287        };
288    }
289
290    private final class H extends Handler {
291        private static final int SHOW = 0;
292        private static final int HIDE = 1;
293
294        @Override
295        public void handleMessage(Message msg) {
296            switch(msg.what) {
297                case SHOW:
298                    handleShow((String)msg.obj);
299                    break;
300                case HIDE:
301                    handleHide();
302                    break;
303            }
304        }
305    }
306}
307