CameraWidgetFrame.java revision 5ecd81154fa039961f65bb4e36d18ac555b0d1d6 
1/*
2 * Copyright (C) 2012 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.keyguard;
18
19import android.content.Context;
20import android.content.pm.PackageManager.NameNotFoundException;
21import android.graphics.Color;
22import android.graphics.Point;
23import android.graphics.Rect;
24import android.os.Handler;
25import android.os.SystemClock;
26import android.util.Log;
27import android.view.LayoutInflater;
28import android.view.MotionEvent;
29import android.view.View;
30import android.view.ViewGroup;
31import android.view.WindowManager;
32import android.widget.FrameLayout;
33import android.widget.ImageView;
34import android.widget.ImageView.ScaleType;
35
36import com.android.keyguard.KeyguardActivityLauncher.CameraWidgetInfo;
37
38public class CameraWidgetFrame extends KeyguardWidgetFrame implements View.OnClickListener {
39    private static final String TAG = CameraWidgetFrame.class.getSimpleName();
40    private static final boolean DEBUG = KeyguardHostView.DEBUG;
41    private static final int WIDGET_ANIMATION_DURATION = 250; // ms
42    private static final int WIDGET_WAIT_DURATION = 650; // ms
43    private static final int RECOVERY_DELAY = 1000; // ms
44
45    interface Callbacks {
46        void onLaunchingCamera();
47        void onCameraLaunchedSuccessfully();
48        void onCameraLaunchedUnsuccessfully();
49    }
50
51    private final Handler mHandler = new Handler();
52    private final KeyguardActivityLauncher mActivityLauncher;
53    private final Callbacks mCallbacks;
54    private final CameraWidgetInfo mWidgetInfo;
55    private final WindowManager mWindowManager;
56    private final Point mRenderedSize = new Point();
57    private final int[] mTmpLoc = new int[2];
58    private final Rect mTmpRect = new Rect();
59
60    private long mLaunchCameraStart;
61    private boolean mActive;
62    private boolean mTransitioning;
63    private boolean mDown;
64
65    private FixedSizeFrameLayout mPreview;
66    private View mFullscreenPreview;
67
68    private final Runnable mTransitionToCameraRunnable = new Runnable() {
69        @Override
70        public void run() {
71            transitionToCamera();
72        }};
73
74    private final Runnable mTransitionToCameraEndAction = new Runnable() {
75        @Override
76        public void run() {
77            if (!mTransitioning)
78                return;
79            Handler worker =  getWorkerHandler() != null ? getWorkerHandler() : mHandler;
80            mLaunchCameraStart = SystemClock.uptimeMillis();
81            if (DEBUG) Log.d(TAG, "Launching camera at " + mLaunchCameraStart);
82            mActivityLauncher.launchCamera(worker, mSecureCameraActivityStartedRunnable);
83        }};
84
85    private final Runnable mPostTransitionToCameraEndAction = new Runnable() {
86        @Override
87        public void run() {
88            mHandler.post(mTransitionToCameraEndAction);
89        }};
90
91    private final Runnable mRecoverRunnable = new Runnable() {
92        @Override
93        public void run() {
94            recover();
95        }};
96
97    private final Runnable mRenderRunnable = new Runnable() {
98        @Override
99        public void run() {
100            render();
101        }};
102
103    private final Runnable mSecureCameraActivityStartedRunnable = new Runnable() {
104        @Override
105        public void run() {
106            onSecureCameraActivityStarted();
107        }
108    };
109
110    private final KeyguardUpdateMonitorCallback mCallback = new KeyguardUpdateMonitorCallback() {
111        private boolean mShowing;
112        void onKeyguardVisibilityChanged(boolean showing) {
113            if (mShowing == showing)
114                return;
115            mShowing = showing;
116            CameraWidgetFrame.this.onKeyguardVisibilityChanged(mShowing);
117        };
118    };
119
120    private static final class FixedSizeFrameLayout extends FrameLayout {
121        int width;
122        int height;
123
124        FixedSizeFrameLayout(Context context) {
125            super(context);
126        }
127
128        @Override
129        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
130            measureChildren(
131                    MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY),
132                    MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY));
133            setMeasuredDimension(width, height);
134        }
135    }
136
137    private CameraWidgetFrame(Context context, Callbacks callbacks,
138            KeyguardActivityLauncher activityLauncher,
139            CameraWidgetInfo widgetInfo, View previewWidget) {
140        super(context);
141        mCallbacks = callbacks;
142        mActivityLauncher = activityLauncher;
143        mWidgetInfo = widgetInfo;
144        mWindowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
145        KeyguardUpdateMonitor.getInstance(context).registerCallback(mCallback);
146
147        mPreview = new FixedSizeFrameLayout(context);
148        mPreview.addView(previewWidget);
149        addView(mPreview);
150
151        View clickBlocker = new View(context);
152        clickBlocker.setBackgroundColor(Color.TRANSPARENT);
153        clickBlocker.setOnClickListener(this);
154        addView(clickBlocker);
155
156        setContentDescription(context.getString(R.string.keyguard_accessibility_camera));
157        if (DEBUG) Log.d(TAG, "new CameraWidgetFrame instance " + instanceId());
158    }
159
160    public static CameraWidgetFrame create(Context context, Callbacks callbacks,
161            KeyguardActivityLauncher launcher) {
162        if (context == null || callbacks == null || launcher == null)
163            return null;
164
165        CameraWidgetInfo widgetInfo = launcher.getCameraWidgetInfo();
166        if (widgetInfo == null)
167            return null;
168        View previewWidget = getPreviewWidget(context, widgetInfo);
169        if (previewWidget == null)
170            return null;
171
172        return new CameraWidgetFrame(context, callbacks, launcher, widgetInfo, previewWidget);
173    }
174
175    private static View getPreviewWidget(Context context, CameraWidgetInfo widgetInfo) {
176        return widgetInfo.layoutId > 0 ?
177                inflateWidgetView(context, widgetInfo) :
178                inflateGenericWidgetView(context);
179    }
180
181    private static View inflateWidgetView(Context context, CameraWidgetInfo widgetInfo) {
182        if (DEBUG) Log.d(TAG, "inflateWidgetView: " + widgetInfo.contextPackage);
183        View widgetView = null;
184        Exception exception = null;
185        try {
186            Context cameraContext = context.createPackageContext(
187                    widgetInfo.contextPackage, Context.CONTEXT_RESTRICTED);
188            LayoutInflater cameraInflater = (LayoutInflater)
189                    cameraContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
190            cameraInflater = cameraInflater.cloneInContext(cameraContext);
191            widgetView = cameraInflater.inflate(widgetInfo.layoutId, null, false);
192        } catch (NameNotFoundException e) {
193            exception = e;
194        } catch (RuntimeException e) {
195            exception = e;
196        }
197        if (exception != null) {
198            Log.w(TAG, "Error creating camera widget view", exception);
199        }
200        return widgetView;
201    }
202
203    private static View inflateGenericWidgetView(Context context) {
204        if (DEBUG) Log.d(TAG, "inflateGenericWidgetView");
205        ImageView iv = new ImageView(context);
206        iv.setImageResource(R.drawable.ic_lockscreen_camera);
207        iv.setScaleType(ScaleType.CENTER);
208        iv.setBackgroundColor(Color.argb(127, 0, 0, 0));
209        return iv;
210    }
211
212    private void render() {
213        final View root = getRootView();
214        final int width = root.getWidth();
215        final int height = root.getHeight();
216        if (mRenderedSize.x == width && mRenderedSize.y == height) {
217            if (DEBUG) Log.d(TAG, String.format("Already rendered at size=%sx%s", width, height));
218            return;
219        }
220        if (width == 0 || height == 0) {
221            return;
222        }
223
224        mPreview.width = width;
225        mPreview.height = height;
226        mPreview.requestLayout();
227
228        final int thisWidth = getWidth() - getPaddingLeft() - getPaddingRight();
229        final int thisHeight = getHeight() - getPaddingTop() - getPaddingBottom();
230
231        final float pvScaleX = (float) thisWidth / width;
232        final float pvScaleY = (float) thisHeight / height;
233        final float pvScale = Math.min(pvScaleX, pvScaleY);
234
235        final int pvWidth = (int) (pvScale * width);
236        final int pvHeight = (int) (pvScale * height);
237
238        final float pvTransX = pvWidth < thisWidth ? (thisWidth - pvWidth) / 2 : 0;
239        final float pvTransY = pvHeight < thisHeight ? (thisHeight - pvHeight) / 2 : 0;
240
241        mPreview.setPivotX(0);
242        mPreview.setPivotY(0);
243        mPreview.setScaleX(pvScale);
244        mPreview.setScaleY(pvScale);
245        mPreview.setTranslationX(pvTransX);
246        mPreview.setTranslationY(pvTransY);
247
248        mRenderedSize.set(width, height);
249        if (DEBUG) Log.d(TAG, String.format("Rendered camera widget size=%sx%s instance=%s",
250                width, height, instanceId()));
251    }
252
253    private void transitionToCamera() {
254        if (mTransitioning || mDown) return;
255
256        mTransitioning = true;
257
258        enableWindowExitAnimation(false);
259
260        mPreview.getLocationInWindow(mTmpLoc);
261        final float pvHeight = mPreview.getHeight() * mPreview.getScaleY();
262        final float pvCenter = mTmpLoc[1] + pvHeight / 2f;
263
264        final ViewGroup root = (ViewGroup) getRootView();
265        if (mFullscreenPreview == null) {
266            mFullscreenPreview = getPreviewWidget(mContext, mWidgetInfo);
267            mFullscreenPreview.setClickable(false);
268            root.addView(mFullscreenPreview);
269        }
270
271        root.getWindowVisibleDisplayFrame(mTmpRect);
272        final float fsHeight = mTmpRect.height();
273        final float fsCenter = mTmpRect.top + fsHeight / 2;
274
275        final float fsScaleY = pvHeight / fsHeight;
276        final float fsTransY = pvCenter - fsCenter;
277        final float fsScaleX = mPreview.getScaleX();
278
279        mPreview.setVisibility(View.GONE);
280        mFullscreenPreview.setVisibility(View.VISIBLE);
281        mFullscreenPreview.setTranslationY(fsTransY);
282        mFullscreenPreview.setScaleX(fsScaleX);
283        mFullscreenPreview.setScaleY(fsScaleY);
284        mFullscreenPreview
285            .animate()
286            .scaleX(1)
287            .scaleY(1)
288            .translationX(0)
289            .translationY(0)
290            .setDuration(WIDGET_ANIMATION_DURATION)
291            .withEndAction(mPostTransitionToCameraEndAction)
292            .start();
293        mCallbacks.onLaunchingCamera();
294    }
295
296    private void recover() {
297        if (DEBUG) Log.d(TAG, "recovering at " + SystemClock.uptimeMillis());
298        mCallbacks.onCameraLaunchedUnsuccessfully();
299        reset();
300    }
301
302    @Override
303    public void setOnLongClickListener(OnLongClickListener l) {
304        // ignore
305    }
306
307    @Override
308    public void onClick(View v) {
309        if (DEBUG) Log.d(TAG, "clicked");
310        if (mTransitioning) return;
311        if (mActive) {
312            cancelTransitionToCamera();
313            transitionToCamera();
314        }
315    }
316
317    @Override
318    protected void onDetachedFromWindow() {
319        if (DEBUG) Log.d(TAG, "onDetachedFromWindow: instance " + instanceId()
320                + " at " + SystemClock.uptimeMillis());
321        super.onDetachedFromWindow();
322        KeyguardUpdateMonitor.getInstance(mContext).removeCallback(mCallback);
323        cancelTransitionToCamera();
324        mHandler.removeCallbacks(mRecoverRunnable);
325    }
326
327    @Override
328    public void onActive(boolean isActive) {
329        mActive = isActive;
330        if (mActive) {
331            rescheduleTransitionToCamera();
332        } else {
333            reset();
334        }
335    }
336
337    @Override
338    public boolean onUserInteraction(MotionEvent event) {
339        if (mTransitioning) {
340            if (DEBUG) Log.d(TAG, "onUserInteraction eaten: mTransitioning");
341            return true;
342        }
343
344        getLocationOnScreen(mTmpLoc);
345        int rawBottom = mTmpLoc[1] + getHeight();
346        if (event.getRawY() > rawBottom) {
347            if (DEBUG) Log.d(TAG, "onUserInteraction eaten: below widget");
348            return true;
349        }
350
351        int action = event.getAction();
352        mDown = action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_MOVE;
353        if (mActive) {
354            rescheduleTransitionToCamera();
355        }
356        if (DEBUG) Log.d(TAG, "onUserInteraction observed, not eaten");
357        return false;
358    }
359
360    @Override
361    protected void onFocusLost() {
362        if (DEBUG) Log.d(TAG, "onFocusLost at " + SystemClock.uptimeMillis());
363        cancelTransitionToCamera();
364        super.onFocusLost();
365    }
366
367    public void onScreenTurnedOff() {
368        if (DEBUG) Log.d(TAG, "onScreenTurnedOff");
369        reset();
370    }
371
372    private void rescheduleTransitionToCamera() {
373        if (DEBUG) Log.d(TAG, "rescheduleTransitionToCamera at " + SystemClock.uptimeMillis());
374        mHandler.removeCallbacks(mTransitionToCameraRunnable);
375        mHandler.postDelayed(mTransitionToCameraRunnable, WIDGET_WAIT_DURATION);
376    }
377
378    private void cancelTransitionToCamera() {
379        if (DEBUG) Log.d(TAG, "cancelTransitionToCamera at " + SystemClock.uptimeMillis());
380        mHandler.removeCallbacks(mTransitionToCameraRunnable);
381    }
382
383    private void onCameraLaunched() {
384        mCallbacks.onCameraLaunchedSuccessfully();
385        reset();
386    }
387
388    private void reset() {
389        if (DEBUG) Log.d(TAG, "reset at " + SystemClock.uptimeMillis());
390        mLaunchCameraStart = 0;
391        mTransitioning = false;
392        mDown = false;
393        cancelTransitionToCamera();
394        mHandler.removeCallbacks(mRecoverRunnable);
395        mPreview.setVisibility(View.VISIBLE);
396        if (mFullscreenPreview != null) {
397            mFullscreenPreview.animate().cancel();
398            mFullscreenPreview.setVisibility(View.GONE);
399        }
400        enableWindowExitAnimation(true);
401    }
402
403    @Override
404    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
405        if (DEBUG) Log.d(TAG, String.format("onSizeChanged new=%sx%s old=%sx%s at %s",
406                w, h, oldw, oldh, SystemClock.uptimeMillis()));
407        mHandler.post(mRenderRunnable);
408        super.onSizeChanged(w, h, oldw, oldh);
409    }
410
411    @Override
412    public void onBouncerShowing(boolean showing) {
413        if (showing) {
414            mTransitioning = false;
415            mHandler.post(mRecoverRunnable);
416        }
417    }
418
419    private void enableWindowExitAnimation(boolean isEnabled) {
420        View root = getRootView();
421        ViewGroup.LayoutParams lp = root.getLayoutParams();
422        if (!(lp instanceof WindowManager.LayoutParams))
423            return;
424        WindowManager.LayoutParams wlp = (WindowManager.LayoutParams) lp;
425        int newWindowAnimations = isEnabled ? R.style.Animation_LockScreen : 0;
426        if (newWindowAnimations != wlp.windowAnimations) {
427            if (DEBUG) Log.d(TAG, "setting windowAnimations to: " + newWindowAnimations
428                    + " at " + SystemClock.uptimeMillis());
429            wlp.windowAnimations = newWindowAnimations;
430            mWindowManager.updateViewLayout(root, wlp);
431        }
432    }
433
434    private void onKeyguardVisibilityChanged(boolean showing) {
435        if (DEBUG) Log.d(TAG, "onKeyguardVisibilityChanged " + showing
436                + " at " + SystemClock.uptimeMillis());
437        if (mTransitioning && !showing) {
438            mTransitioning = false;
439            mHandler.removeCallbacks(mRecoverRunnable);
440            if (mLaunchCameraStart > 0) {
441                long launchTime = SystemClock.uptimeMillis() - mLaunchCameraStart;
442                if (DEBUG) Log.d(TAG, String.format("Camera took %sms to launch", launchTime));
443                mLaunchCameraStart = 0;
444                onCameraLaunched();
445            }
446        }
447    }
448
449    private void onSecureCameraActivityStarted() {
450        if (DEBUG) Log.d(TAG, "onSecureCameraActivityStarted at " + SystemClock.uptimeMillis());
451        mHandler.postDelayed(mRecoverRunnable, RECOVERY_DELAY);
452    }
453
454    private String instanceId() {
455        return Integer.toHexString(hashCode());
456    }
457}
458