1 /* 2 * Copyright (C) 2016 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 com.android.car.radio; 18 19 import android.content.Context; 20 import android.media.session.PlaybackState; 21 import android.support.car.ui.FabDrawable; 22 import android.util.AttributeSet; 23 import android.util.Log; 24 import android.widget.ImageView; 25 26 /** 27 * An {@link ImageView} that renders a play/pause button like a floating action button. 28 */ 29 public class PlayPauseButton extends ImageView { 30 private static final String TAG = "Em.PlayPauseButton"; 31 32 private final int[] STATE_PLAYING = {R.attr.state_playing}; 33 private final int[] STATE_PAUSED = {R.attr.state_paused}; 34 35 private int mPlaybackState = -1; 36 PlayPauseButton(Context context, AttributeSet attrs)37 public PlayPauseButton(Context context, AttributeSet attrs) { 38 super(context, attrs); 39 40 FabDrawable fabDrawable = new FabDrawable(context); 41 fabDrawable.setFabAndStrokeColor( 42 context.getColor(R.color.car_radio_accent_color)); 43 setBackground(fabDrawable); 44 } 45 46 /** 47 * Set the current play state of the button. 48 * 49 * @param playState One of the values from {@link PlaybackState}. Only 50 * {@link PlaybackState#STATE_PAUSED} and {@link PlaybackState#STATE_PLAYING} 51 * are valid. 52 */ setPlayState(int playState)53 public void setPlayState(int playState) { 54 if (playState != PlaybackState.STATE_PAUSED && playState != PlaybackState.STATE_PLAYING) { 55 throw new IllegalArgumentException("Playback state should be either " 56 + "PlaybackState.STATE_PAUSED or PlaybackState.STATE_PLAYING"); 57 } 58 59 mPlaybackState = playState; 60 } 61 62 @Override onCreateDrawableState(int extraSpace)63 public int[] onCreateDrawableState(int extraSpace) { 64 // + 1 so we can potentially add our custom PlayState 65 final int[] drawableState = super.onCreateDrawableState(extraSpace + 1); 66 67 switch(mPlaybackState) { 68 case PlaybackState.STATE_PLAYING: 69 mergeDrawableStates(drawableState, STATE_PLAYING); 70 break; 71 case PlaybackState.STATE_PAUSED: 72 mergeDrawableStates(drawableState, STATE_PAUSED); 73 break; 74 default: 75 Log.e(TAG, "Unknown PlaybackState: " + mPlaybackState); 76 } 77 if (getBackground() != null) { 78 getBackground().setState(drawableState); 79 } 80 return drawableState; 81 } 82 } 83