/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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 android.app;
import com.android.internal.R;
import com.android.internal.app.MediaRouteDialogPresenter;
import android.annotation.NonNull;
import android.content.Context;
import android.content.ContextWrapper;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.media.MediaRouter;
import android.media.MediaRouter.RouteGroup;
import android.media.MediaRouter.RouteInfo;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.HapticFeedbackConstants;
import android.view.SoundEffectConstants;
import android.view.View;
import android.widget.Toast;
public class MediaRouteButton extends View {
private final MediaRouter mRouter;
private final MediaRouterCallback mCallback;
private int mRouteTypes;
private boolean mAttachedToWindow;
private Drawable mRemoteIndicator;
private boolean mRemoteActive;
private boolean mCheatSheetEnabled;
private boolean mIsConnecting;
private int mMinWidth;
private int mMinHeight;
private OnClickListener mExtendedSettingsClickListener;
// The checked state is used when connected to a remote route.
private static final int[] CHECKED_STATE_SET = {
R.attr.state_checked
};
// The activated state is used while connecting to a remote route.
private static final int[] ACTIVATED_STATE_SET = {
R.attr.state_activated
};
public MediaRouteButton(Context context) {
this(context, null);
}
public MediaRouteButton(Context context, AttributeSet attrs) {
this(context, attrs, com.android.internal.R.attr.mediaRouteButtonStyle);
}
public MediaRouteButton(Context context, AttributeSet attrs, int defStyleAttr) {
this(context, attrs, defStyleAttr, 0);
}
public MediaRouteButton(
Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
mRouter = (MediaRouter)context.getSystemService(Context.MEDIA_ROUTER_SERVICE);
mCallback = new MediaRouterCallback();
final TypedArray a = context.obtainStyledAttributes(attrs,
com.android.internal.R.styleable.MediaRouteButton, defStyleAttr, defStyleRes);
setRemoteIndicatorDrawable(a.getDrawable(
com.android.internal.R.styleable.MediaRouteButton_externalRouteEnabledDrawable));
mMinWidth = a.getDimensionPixelSize(
com.android.internal.R.styleable.MediaRouteButton_minWidth, 0);
mMinHeight = a.getDimensionPixelSize(
com.android.internal.R.styleable.MediaRouteButton_minHeight, 0);
final int routeTypes = a.getInteger(
com.android.internal.R.styleable.MediaRouteButton_mediaRouteTypes,
MediaRouter.ROUTE_TYPE_LIVE_AUDIO);
a.recycle();
setClickable(true);
setLongClickable(true);
setRouteTypes(routeTypes);
}
/**
* Gets the media route types for filtering the routes that the user can
* select using the media route chooser dialog.
*
* @return The route types.
*/
public int getRouteTypes() {
return mRouteTypes;
}
/**
* Sets the types of routes that will be shown in the media route chooser dialog
* launched by this button.
*
* @param types The route types to match.
*/
public void setRouteTypes(int types) {
if (mRouteTypes != types) {
if (mAttachedToWindow && mRouteTypes != 0) {
mRouter.removeCallback(mCallback);
}
mRouteTypes = types;
if (mAttachedToWindow && types != 0) {
mRouter.addCallback(types, mCallback,
MediaRouter.CALLBACK_FLAG_PASSIVE_DISCOVERY);
}
refreshRoute();
}
}
public void setExtendedSettingsClickListener(OnClickListener listener) {
mExtendedSettingsClickListener = listener;
}
/**
* Show the route chooser or controller dialog.
* <p>
* If the default route is selected or if the currently selected route does
* not match the {@link #getRouteTypes route types}, then shows the route chooser dialog.
* Otherwise, shows the route controller dialog to offer the user
* a choice to disconnect from the route or perform other control actions
* such as setting the route's volume.
* </p><p>
* This will attach a {@link DialogFragment} to the containing Activity.
* </p>
*/
public void showDialog() {
showDialogInternal();
}
boolean showDialogInternal() {
if (!mAttachedToWindow) {
return false;
}
DialogFragment f = MediaRouteDialogPresenter.showDialogFragment(getActivity(),
mRouteTypes, mExtendedSettingsClickListener);
return f != null;
}
private Activity getActivity() {
// Gross way of unwrapping the Activity so we can get the FragmentManager
Context context = getContext();
while (context instanceof ContextWrapper) {
if (context instanceof Activity) {
return (Activity)context;
}
context = ((ContextWrapper)context).getBaseContext();
}
throw new IllegalStateException("The MediaRouteButton's Context is not an Activity.");
}
/**
* Sets whether to enable showing a toast with the content descriptor of the
* button when the button is long pressed.
*/
void setCheatSheetEnabled(boolean enable) {
mCheatSheetEnabled = enable;
}
@Override
public boolean performClick() {
// Send the appropriate accessibility events and call listeners
boolean handled = super.performClick();
if (!handled) {
playSoundEffect(SoundEffectConstants.CLICK);
}
return showDialogInternal() || handled;
}
@Override
public boolean performLongClick() {
if (super.performLongClick()) {
return true;
}
if (!mCheatSheetEnabled) {
return false;
}
final CharSequence contentDesc = getContentDescription();
if (TextUtils.isEmpty(contentDesc)) {
// Don't show the cheat sheet if we have no description
return false;
}
final int[] screenPos = new int[2];
final Rect displayFrame = new Rect();
getLocationOnScreen(screenPos);
getWindowVisibleDisplayFrame(displayFrame);
final Context context = getContext();
final int width = getWidth();
final int height = getHeight();
final int midy = screenPos[1] + height / 2;
final int screenWidth = context.getResources().getDisplayMetrics().widthPixels;
Toast cheatSheet = Toast.makeText(context, contentDesc, Toast.LENGTH_SHORT);
if (midy < displayFrame.height()) {
// Show along the top; follow action buttons
cheatSheet.setGravity(Gravity.TOP | Gravity.END,
screenWidth - screenPos[0] - width / 2, height);
} else {
// Show along the bottom center
cheatSheet.setGravity(Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, height);
}
cheatSheet.show();
performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
return true;
}
@Override
protected int[] onCreateDrawableState(int extraSpace) {
final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
// Technically we should be handling this more completely, but these
// are implementation details here. Checked is used to express the connecting
// drawable state and it's mutually exclusive with activated for the purposes
// of state selection here.
if (mIsConnecting) {
mergeDrawableStates(drawableState, CHECKED_STATE_SET);
} else if (mRemoteActive) {
mergeDrawableStates(drawableState, ACTIVATED_STATE_SET);
}
return drawableState;
}
@Override
protected void drawableStateChanged() {
super.drawableStateChanged();
final Drawable remoteIndicator = mRemoteIndicator;
if (remoteIndicator != null && remoteIndicator.isStateful()
&& remoteIndicator.setState(getDrawableState())) {
invalidateDrawable(remoteIndicator);
}
}
private void setRemoteIndicatorDrawable(Drawable d) {
if (mRemoteIndicator != null) {
mRemoteIndicator.setCallback(null);
unscheduleDrawable(mRemoteIndicator);
}
mRemoteIndicator = d;
if (d != null) {
d.setCallback(this);
d.setState(getDrawableState());
d.setVisible(getVisibility() == VISIBLE, false);
}
refreshDrawableState();
}
@Override
protected boolean verifyDrawable(@NonNull Drawable who) {
return super.verifyDrawable(who) || who == mRemoteIndicator;
}
@Override
public void jumpDrawablesToCurrentState() {
super.jumpDrawablesToCurrentState();
if (mRemoteIndicator != null) {
mRemoteIndicator.jumpToCurrentState();
}
}
@Override
public void setVisibility(int visibility) {
super.setVisibility(visibility);
if (mRemoteIndicator != null) {
mRemoteIndicator.setVisible(getVisibility() == VISIBLE, false);
}
}
@Override
public void onAttachedToWindow() {
super.onAttachedToWindow();
mAttachedToWindow = true;
if (mRouteTypes != 0) {
mRouter.addCallback(mRouteTypes, mCallback,
MediaRouter.CALLBACK_FLAG_PASSIVE_DISCOVERY);
}
refreshRoute();
}
@Override
public void onDetachedFromWindow() {
mAttachedToWindow = false;
if (mRouteTypes != 0) {
mRouter.removeCallback(mCallback);
}
super.onDetachedFromWindow();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int widthSize = MeasureSpec.getSize(widthMeasureSpec);
final int heightSize = MeasureSpec.getSize(heightMeasureSpec);
final int widthMode = MeasureSpec.getMode(widthMeasureSpec);
final int heightMode = MeasureSpec.getMode(heightMeasureSpec);
final int width = Math.max(mMinWidth, mRemoteIndicator != null ?
mRemoteIndicator.getIntrinsicWidth() + getPaddingLeft() + getPaddingRight() : 0);
final int height = Math.max(mMinHeight, mRemoteIndicator != null ?
mRemoteIndicator.getIntrinsicHeight() + getPaddingTop() + getPaddingBottom() : 0);
int measuredWidth;
switch (widthMode) {
case MeasureSpec.EXACTLY:
measuredWidth = widthSize;
break;
case MeasureSpec.AT_MOST:
measuredWidth = Math.min(widthSize, width);
break;
default:
case MeasureSpec.UNSPECIFIED:
measuredWidth = width;
break;
}
int measuredHeight;
switch (heightMode) {
case MeasureSpec.EXACTLY:
measuredHeight = heightSize;
break;
case MeasureSpec.AT_MOST:
measuredHeight = Math.min(heightSize, height);
break;
default:
case MeasureSpec.UNSPECIFIED:
measuredHeight = height;
break;
}
setMeasuredDimension(measuredWidth, measuredHeight);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mRemoteIndicator == null) return;
final int left = getPaddingLeft();
final int right = getWidth() - getPaddingRight();
final int top = getPaddingTop();
final int bottom = getHeight() - getPaddingBottom();
final int drawWidth = mRemoteIndicator.getIntrinsicWidth();
final int drawHeight = mRemoteIndicator.getIntrinsicHeight();
final int drawLeft = left + (right - left - drawWidth) / 2;
final int drawTop = top + (bottom - top - drawHeight) / 2;
mRemoteIndicator.setBounds(drawLeft, drawTop,
drawLeft + drawWidth, drawTop + drawHeight);
mRemoteIndicator.draw(canvas);
}
private void refreshRoute() {
if (mAttachedToWindow) {
final MediaRouter.RouteInfo route = mRouter.getSelectedRoute();
final boolean isRemote = !route.isDefault() && route.matchesTypes(mRouteTypes);
final boolean isConnecting = isRemote && route.isConnecting();
boolean needsRefresh = false;
if (mRemoteActive != isRemote) {
mRemoteActive = isRemote;
needsRefresh = true;
}
if (mIsConnecting != isConnecting) {
mIsConnecting = isConnecting;
needsRefresh = true;
}
if (needsRefresh) {
refreshDrawableState();
}
setEnabled(mRouter.isRouteAvailable(mRouteTypes,
MediaRouter.AVAILABILITY_FLAG_IGNORE_DEFAULT_ROUTE));
}
}
private final class MediaRouterCallback extends MediaRouter.SimpleCallback {
@Override
public void onRouteAdded(MediaRouter router, RouteInfo info) {
refreshRoute();
}
@Override
public void onRouteRemoved(MediaRouter router, RouteInfo info) {
refreshRoute();
}
@Override
public void onRouteChanged(MediaRouter router, RouteInfo info) {
refreshRoute();
}
@Override
public void onRouteSelected(MediaRouter router, int type, RouteInfo info) {
refreshRoute();
}
@Override
public void onRouteUnselected(MediaRouter router, int type, RouteInfo info) {
refreshRoute();
}
@Override
public void onRouteGrouped(MediaRouter router, RouteInfo info, RouteGroup group,
int index) {
refreshRoute();
}
@Override
public void onRouteUngrouped(MediaRouter router, RouteInfo info, RouteGroup group) {
refreshRoute();
}
}
}