Home | History | Annotate | Download | only in app 
      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 
     17 package android.app;
     18 
     19 import com.android.internal.R;
     20 import com.android.internal.app.MediaRouteDialogPresenter;
     21 
     22 import android.annotation.NonNull;
     23 import android.content.Context;
     24 import android.content.ContextWrapper;
     25 import android.content.res.TypedArray;
     26 import android.graphics.Canvas;
     27 import android.graphics.drawable.AnimationDrawable;
     28 import android.graphics.drawable.Drawable;
     29 import android.media.MediaRouter;
     30 import android.media.MediaRouter.RouteGroup;
     31 import android.media.MediaRouter.RouteInfo;
     32 import android.util.AttributeSet;
     33 import android.view.SoundEffectConstants;
     34 import android.view.View;
     35 
     36 public class MediaRouteButton extends View {
     37     private final MediaRouter mRouter;
     38     private final MediaRouterCallback mCallback;
     39 
     40     private int mRouteTypes;
     41 
     42     private boolean mAttachedToWindow;
     43 
     44     private Drawable mRemoteIndicator;
     45     private boolean mRemoteActive;
     46     private boolean mIsConnecting;
     47 
     48     private int mMinWidth;
     49     private int mMinHeight;
     50 
     51     private OnClickListener mExtendedSettingsClickListener;
     52 
     53     // The checked state is used when connected to a remote route.
     54     private static final int[] CHECKED_STATE_SET = {
     55         R.attr.state_checked
     56     };
     57 
     58     // The activated state is used while connecting to a remote route.
     59     private static final int[] ACTIVATED_STATE_SET = {
     60         R.attr.state_activated
     61     };
     62 
     63     public MediaRouteButton(Context context) {
     64         this(context, null);
     65     }
     66 
     67     public MediaRouteButton(Context context, AttributeSet attrs) {
     68         this(context, attrs, com.android.internal.R.attr.mediaRouteButtonStyle);
     69     }
     70 
     71     public MediaRouteButton(Context context, AttributeSet attrs, int defStyleAttr) {
     72         this(context, attrs, defStyleAttr, 0);
     73     }
     74 
     75     public MediaRouteButton(
     76             Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
     77         super(context, attrs, defStyleAttr, defStyleRes);
     78 
     79         mRouter = (MediaRouter)context.getSystemService(Context.MEDIA_ROUTER_SERVICE);
     80         mCallback = new MediaRouterCallback();
     81 
     82         final TypedArray a = context.obtainStyledAttributes(attrs,
     83                 com.android.internal.R.styleable.MediaRouteButton, defStyleAttr, defStyleRes);
     84         setRemoteIndicatorDrawable(a.getDrawable(
     85                 com.android.internal.R.styleable.MediaRouteButton_externalRouteEnabledDrawable));
     86         mMinWidth = a.getDimensionPixelSize(
     87                 com.android.internal.R.styleable.MediaRouteButton_minWidth, 0);
     88         mMinHeight = a.getDimensionPixelSize(
     89                 com.android.internal.R.styleable.MediaRouteButton_minHeight, 0);
     90         final int routeTypes = a.getInteger(
     91                 com.android.internal.R.styleable.MediaRouteButton_mediaRouteTypes,
     92                 MediaRouter.ROUTE_TYPE_LIVE_AUDIO);
     93         a.recycle();
     94 
     95         setClickable(true);
     96 
     97         setRouteTypes(routeTypes);
     98     }
     99 
    100     /**
    101      * Gets the media route types for filtering the routes that the user can
    102      * select using the media route chooser dialog.
    103      *
    104      * @return The route types.
    105      */
    106     public int getRouteTypes() {
    107         return mRouteTypes;
    108     }
    109 
    110     /**
    111      * Sets the types of routes that will be shown in the media route chooser dialog
    112      * launched by this button.
    113      *
    114      * @param types The route types to match.
    115      */
    116     public void setRouteTypes(int types) {
    117         if (mRouteTypes != types) {
    118             if (mAttachedToWindow && mRouteTypes != 0) {
    119                 mRouter.removeCallback(mCallback);
    120             }
    121 
    122             mRouteTypes = types;
    123 
    124             if (mAttachedToWindow && types != 0) {
    125                 mRouter.addCallback(types, mCallback,
    126                         MediaRouter.CALLBACK_FLAG_PASSIVE_DISCOVERY);
    127             }
    128 
    129             refreshRoute();
    130         }
    131     }
    132 
    133     public void setExtendedSettingsClickListener(OnClickListener listener) {
    134         mExtendedSettingsClickListener = listener;
    135     }
    136 
    137     /**
    138      * Show the route chooser or controller dialog.
    139      * <p>
    140      * If the default route is selected or if the currently selected route does
    141      * not match the {@link #getRouteTypes route types}, then shows the route chooser dialog.
    142      * Otherwise, shows the route controller dialog to offer the user
    143      * a choice to disconnect from the route or perform other control actions
    144      * such as setting the route's volume.
    145      * </p><p>
    146      * This will attach a {@link DialogFragment} to the containing Activity.
    147      * </p>
    148      */
    149     public void showDialog() {
    150         showDialogInternal();
    151     }
    152 
    153     boolean showDialogInternal() {
    154         if (!mAttachedToWindow) {
    155             return false;
    156         }
    157 
    158         DialogFragment f = MediaRouteDialogPresenter.showDialogFragment(getActivity(),
    159                 mRouteTypes, mExtendedSettingsClickListener);
    160         return f != null;
    161     }
    162 
    163     private Activity getActivity() {
    164         // Gross way of unwrapping the Activity so we can get the FragmentManager
    165         Context context = getContext();
    166         while (context instanceof ContextWrapper) {
    167             if (context instanceof Activity) {
    168                 return (Activity)context;
    169             }
    170             context = ((ContextWrapper)context).getBaseContext();
    171         }
    172         throw new IllegalStateException("The MediaRouteButton's Context is not an Activity.");
    173     }
    174 
    175     @Override
    176     public void setContentDescription(CharSequence contentDescription) {
    177         super.setContentDescription(contentDescription);
    178         setTooltipText(contentDescription);
    179     }
    180 
    181     @Override
    182     public boolean performClick() {
    183         // Send the appropriate accessibility events and call listeners
    184         boolean handled = super.performClick();
    185         if (!handled) {
    186             playSoundEffect(SoundEffectConstants.CLICK);
    187         }
    188         return showDialogInternal() || handled;
    189     }
    190 
    191     @Override
    192     protected int[] onCreateDrawableState(int extraSpace) {
    193         final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
    194 
    195         // Technically we should be handling this more completely, but these
    196         // are implementation details here. Checked is used to express the connecting
    197         // drawable state and it's mutually exclusive with activated for the purposes
    198         // of state selection here.
    199         if (mIsConnecting) {
    200             mergeDrawableStates(drawableState, CHECKED_STATE_SET);
    201         } else if (mRemoteActive) {
    202             mergeDrawableStates(drawableState, ACTIVATED_STATE_SET);
    203         }
    204         return drawableState;
    205     }
    206 
    207     @Override
    208     protected void drawableStateChanged() {
    209         super.drawableStateChanged();
    210 
    211         final Drawable remoteIndicator = mRemoteIndicator;
    212         if (remoteIndicator != null && remoteIndicator.isStateful()
    213                 && remoteIndicator.setState(getDrawableState())) {
    214             invalidateDrawable(remoteIndicator);
    215         }
    216     }
    217 
    218     private void setRemoteIndicatorDrawable(Drawable d) {
    219         if (mRemoteIndicator != null) {
    220             mRemoteIndicator.setCallback(null);
    221             unscheduleDrawable(mRemoteIndicator);
    222         }
    223         mRemoteIndicator = d;
    224         if (d != null) {
    225             d.setCallback(this);
    226             d.setState(getDrawableState());
    227             d.setVisible(getVisibility() == VISIBLE, false);
    228         }
    229 
    230         refreshDrawableState();
    231     }
    232 
    233     @Override
    234     protected boolean verifyDrawable(@NonNull Drawable who) {
    235         return super.verifyDrawable(who) || who == mRemoteIndicator;
    236     }
    237 
    238     @Override
    239     public void jumpDrawablesToCurrentState() {
    240         super.jumpDrawablesToCurrentState();
    241 
    242         if (mRemoteIndicator != null) {
    243             mRemoteIndicator.jumpToCurrentState();
    244         }
    245     }
    246 
    247     @Override
    248     public void setVisibility(int visibility) {
    249         super.setVisibility(visibility);
    250 
    251         if (mRemoteIndicator != null) {
    252             mRemoteIndicator.setVisible(getVisibility() == VISIBLE, false);
    253         }
    254     }
    255 
    256     @Override
    257     public void onAttachedToWindow() {
    258         super.onAttachedToWindow();
    259 
    260         mAttachedToWindow = true;
    261         if (mRouteTypes != 0) {
    262             mRouter.addCallback(mRouteTypes, mCallback,
    263                     MediaRouter.CALLBACK_FLAG_PASSIVE_DISCOVERY);
    264         }
    265         refreshRoute();
    266     }
    267 
    268     @Override
    269     public void onDetachedFromWindow() {
    270         mAttachedToWindow = false;
    271         if (mRouteTypes != 0) {
    272             mRouter.removeCallback(mCallback);
    273         }
    274 
    275         super.onDetachedFromWindow();
    276     }
    277 
    278     @Override
    279     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    280         final int widthSize = MeasureSpec.getSize(widthMeasureSpec);
    281         final int heightSize = MeasureSpec.getSize(heightMeasureSpec);
    282         final int widthMode = MeasureSpec.getMode(widthMeasureSpec);
    283         final int heightMode = MeasureSpec.getMode(heightMeasureSpec);
    284 
    285         final int width = Math.max(mMinWidth, mRemoteIndicator != null ?
    286                 mRemoteIndicator.getIntrinsicWidth() + getPaddingLeft() + getPaddingRight() : 0);
    287         final int height = Math.max(mMinHeight, mRemoteIndicator != null ?
    288                 mRemoteIndicator.getIntrinsicHeight() + getPaddingTop() + getPaddingBottom() : 0);
    289 
    290         int measuredWidth;
    291         switch (widthMode) {
    292             case MeasureSpec.EXACTLY:
    293                 measuredWidth = widthSize;
    294                 break;
    295             case MeasureSpec.AT_MOST:
    296                 measuredWidth = Math.min(widthSize, width);
    297                 break;
    298             default:
    299             case MeasureSpec.UNSPECIFIED:
    300                 measuredWidth = width;
    301                 break;
    302         }
    303 
    304         int measuredHeight;
    305         switch (heightMode) {
    306             case MeasureSpec.EXACTLY:
    307                 measuredHeight = heightSize;
    308                 break;
    309             case MeasureSpec.AT_MOST:
    310                 measuredHeight = Math.min(heightSize, height);
    311                 break;
    312             default:
    313             case MeasureSpec.UNSPECIFIED:
    314                 measuredHeight = height;
    315                 break;
    316         }
    317 
    318         setMeasuredDimension(measuredWidth, measuredHeight);
    319     }
    320 
    321     @Override
    322     protected void onDraw(Canvas canvas) {
    323         super.onDraw(canvas);
    324 
    325         if (mRemoteIndicator == null) return;
    326 
    327         final int left = getPaddingLeft();
    328         final int right = getWidth() - getPaddingRight();
    329         final int top = getPaddingTop();
    330         final int bottom = getHeight() - getPaddingBottom();
    331 
    332         final int drawWidth = mRemoteIndicator.getIntrinsicWidth();
    333         final int drawHeight = mRemoteIndicator.getIntrinsicHeight();
    334         final int drawLeft = left + (right - left - drawWidth) / 2;
    335         final int drawTop = top + (bottom - top - drawHeight) / 2;
    336 
    337         mRemoteIndicator.setBounds(drawLeft, drawTop,
    338                 drawLeft + drawWidth, drawTop + drawHeight);
    339         mRemoteIndicator.draw(canvas);
    340     }
    341 
    342     private void refreshRoute() {
    343         final MediaRouter.RouteInfo route = mRouter.getSelectedRoute();
    344         final boolean isRemote = !route.isDefault() && route.matchesTypes(mRouteTypes);
    345         final boolean isConnecting = isRemote && route.isConnecting();
    346         boolean needsRefresh = false;
    347         if (mRemoteActive != isRemote) {
    348             mRemoteActive = isRemote;
    349             needsRefresh = true;
    350         }
    351         if (mIsConnecting != isConnecting) {
    352             mIsConnecting = isConnecting;
    353             needsRefresh = true;
    354         }
    355 
    356         if (needsRefresh) {
    357             refreshDrawableState();
    358         }
    359         if (mAttachedToWindow) {
    360             setEnabled(mRouter.isRouteAvailable(mRouteTypes,
    361                     MediaRouter.AVAILABILITY_FLAG_IGNORE_DEFAULT_ROUTE));
    362         }
    363         if (mRemoteIndicator != null
    364                 && mRemoteIndicator.getCurrent() instanceof AnimationDrawable) {
    365             AnimationDrawable curDrawable = (AnimationDrawable) mRemoteIndicator.getCurrent();
    366             if (mAttachedToWindow) {
    367                 if ((needsRefresh || isConnecting) && !curDrawable.isRunning()) {
    368                     curDrawable.start();
    369                 }
    370             } else if (isRemote && !isConnecting) {
    371                 // When the route is already connected before the view is attached, show the last
    372                 // frame of the connected animation immediately.
    373                 if (curDrawable.isRunning()) {
    374                     curDrawable.stop();
    375                 }
    376                 curDrawable.selectDrawable(curDrawable.getNumberOfFrames() - 1);
    377             }
    378         }
    379     }
    380 
    381     private final class MediaRouterCallback extends MediaRouter.SimpleCallback {
    382         @Override
    383         public void onRouteAdded(MediaRouter router, RouteInfo info) {
    384             refreshRoute();
    385         }
    386 
    387         @Override
    388         public void onRouteRemoved(MediaRouter router, RouteInfo info) {
    389             refreshRoute();
    390         }
    391 
    392         @Override
    393         public void onRouteChanged(MediaRouter router, RouteInfo info) {
    394             refreshRoute();
    395         }
    396 
    397         @Override
    398         public void onRouteSelected(MediaRouter router, int type, RouteInfo info) {
    399             refreshRoute();
    400         }
    401 
    402         @Override
    403         public void onRouteUnselected(MediaRouter router, int type, RouteInfo info) {
    404             refreshRoute();
    405         }
    406 
    407         @Override
    408         public void onRouteGrouped(MediaRouter router, RouteInfo info, RouteGroup group,
    409                 int index) {
    410             refreshRoute();
    411         }
    412 
    413         @Override
    414         public void onRouteUngrouped(MediaRouter router, RouteInfo info, RouteGroup group) {
    415             refreshRoute();
    416         }
    417     }
    418 }
    419