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.animation.ObjectAnimator; 20 import android.os.Bundle; 21 import android.support.v4.app.Fragment; 22 import android.support.v4.view.animation.FastOutSlowInInterpolator; 23 import android.view.LayoutInflater; 24 import android.view.View; 25 import android.view.ViewGroup; 26 27 /** 28 * A fragment that functions as the main display of the information relating to the current radio 29 * station. It also displays controls that allows the user to switch to different radio stations. 30 */ 31 public class MainRadioFragment extends Fragment implements FragmentWithFade { 32 private static final FastOutSlowInInterpolator sInterpolator = new FastOutSlowInInterpolator(); 33 private static final int FADE_OUT_START_DELAY_MS = 150; 34 private static final int FADE_ANIM_TIME_MS = 100; 35 36 private RadioController mRadioController; 37 private RadioPresetListClickListener mPresetListListener; 38 39 private View mRootView; 40 private View mMainDisplay; 41 42 /** 43 * Interface for a class that will be notified when the button to open the list of the user's 44 * favorite radio stations has been clicked. 45 */ 46 public interface RadioPresetListClickListener { 47 /** 48 * Method that will be called when the preset list button has been clicked. Clicking this 49 * button should open a display of the user's presets. 50 */ onPresetListClicked()51 void onPresetListClicked(); 52 } 53 54 /** 55 * Sets the {@link RadioController} that is responsible for updating the UI of this fragment 56 * with the information of the current radio station. 57 */ setRadioController(RadioController radioController)58 private void setRadioController(RadioController radioController) { 59 mRadioController = radioController; 60 } 61 62 /** 63 * Sets the listener that will be notified when the button to start the display of the user's 64 * presets has been clicked. 65 */ setPresetListClickListener(RadioPresetListClickListener starter)66 public void setPresetListClickListener(RadioPresetListClickListener starter) { 67 mPresetListListener = starter; 68 } 69 70 @Override onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)71 public View onCreateView(LayoutInflater inflater, ViewGroup container, 72 Bundle savedInstanceState) { 73 mRootView = inflater.inflate(R.layout.radio_fragment, container, false); 74 75 mMainDisplay = mRootView.findViewById(R.id.radio_station_display_container); 76 77 mRootView.findViewById(R.id.radio_presets_list).setOnClickListener(v -> { 78 if (mPresetListListener != null) { 79 mPresetListListener.onPresetListClicked(); 80 } 81 }); 82 83 return mRootView; 84 } 85 86 @Override fadeOutContent()87 public void fadeOutContent() { 88 ObjectAnimator containerAlphaAnimator = 89 ObjectAnimator.ofFloat(mMainDisplay, View.ALPHA, 1f, 0f); 90 containerAlphaAnimator.setInterpolator(sInterpolator); 91 containerAlphaAnimator.setStartDelay(FADE_OUT_START_DELAY_MS); 92 containerAlphaAnimator.setDuration(FADE_ANIM_TIME_MS); 93 containerAlphaAnimator.start(); 94 } 95 96 @Override fadeInContent()97 public void fadeInContent() { 98 ObjectAnimator containerAlphaAnimator = 99 ObjectAnimator.ofFloat(mMainDisplay, View.ALPHA, 0f, 1f); 100 containerAlphaAnimator.setInterpolator(sInterpolator); 101 containerAlphaAnimator.setDuration(FADE_ANIM_TIME_MS); 102 containerAlphaAnimator.start(); 103 } 104 105 @Override onStart()106 public void onStart() { 107 super.onStart(); 108 109 mRadioController.initialize(mRootView); 110 mRadioController.setShouldColorStatusBar(true); 111 112 fadeInContent(); 113 } 114 115 @Override onStop()116 public void onStop() { 117 super.onStop(); 118 fadeOutContent(); 119 } 120 121 @Override onDestroy()122 public void onDestroy() { 123 mPresetListListener = null; 124 super.onDestroy(); 125 } 126 127 /** 128 * Returns a new instance of the {@link MainRadioFragment}. 129 * 130 * @param radioController The {@link RadioController} that is responsible for updating the UI 131 * of the returned fragment. 132 */ newInstance(RadioController radioController)133 public static MainRadioFragment newInstance(RadioController radioController) { 134 MainRadioFragment fragment = new MainRadioFragment(); 135 fragment.setRadioController(radioController); 136 137 return fragment; 138 } 139 } 140