MediaNowPlayingView.java revision c39d9c75590eca86a5e7e32a8824ba04a0d42e9b 
1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5 * in compliance with the License. You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software distributed under the License
10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11 * or implied. See the License for the specific language governing permissions and limitations under
12 * the License.
13 */
14package android.support.v17.leanback.widget;
15
16import android.animation.Animator;
17import android.animation.AnimatorInflater;
18import android.animation.ObjectAnimator;
19import android.content.Context;
20import android.support.annotation.RestrictTo;
21import android.util.AttributeSet;
22import android.view.LayoutInflater;
23import android.view.View;
24import android.widget.ImageView;
25import android.widget.LinearLayout;
26import android.support.v17.leanback.R;
27
28import static android.support.annotation.RestrictTo.Scope.GROUP_ID;
29
30/**
31 * The view displaying 3 animated peak meters next to each other when a media item is playing.
32 * @hide
33 */
34@RestrictTo(GROUP_ID)
35public class MediaNowPlayingView extends LinearLayout{
36
37    private final ImageView mImage1;
38    private final ImageView mImage2;
39    private final ImageView mImage3;
40    private final ObjectAnimator mObjectAnimator1;
41    private final ObjectAnimator mObjectAnimator2;
42    private final ObjectAnimator mObjectAnimator3;
43
44    public MediaNowPlayingView(Context context, AttributeSet attrs) {
45        super(context, attrs);
46
47        LayoutInflater.from(context).inflate(R.layout.lb_playback_now_playing_bars, this, true);
48        mImage1 = (ImageView) findViewById(R.id.bar1);
49        mImage2 = (ImageView) findViewById(R.id.bar2);
50        mImage3 = (ImageView) findViewById(R.id.bar3);
51
52        mImage1.setPivotY(mImage1.getDrawable().getIntrinsicHeight());
53        mImage2.setPivotY(mImage2.getDrawable().getIntrinsicHeight());
54        mImage3.setPivotY(mImage3.getDrawable().getIntrinsicHeight());
55
56        setDropScale(mImage1);
57        setDropScale(mImage2);
58        setDropScale(mImage3);
59
60        mObjectAnimator1 = (ObjectAnimator) AnimatorInflater.loadAnimator(context,
61                R.animator.lb_playback_now_bar1_animator);
62        mObjectAnimator1.setTarget(mImage1);
63
64        mObjectAnimator2 = (ObjectAnimator) AnimatorInflater.loadAnimator(context,
65                R.animator.lb_playback_now_bar2_animator);
66        mObjectAnimator2.setTarget(mImage2);
67
68        mObjectAnimator3 = (ObjectAnimator) AnimatorInflater.loadAnimator(context,
69                R.animator.lb_playback_now_bar3_animator);
70        mObjectAnimator3.setTarget(mImage3);
71    }
72
73    static void setDropScale(View view) {
74        view.setScaleY(1f / 12f);
75    }
76
77    @Override
78    public void setVisibility(int visibility) {
79        super.setVisibility(visibility);
80        if (visibility == View.GONE) {
81            stopAnimation();
82        } else {
83            startAnimation();
84        }
85    }
86
87    @Override
88    protected void onAttachedToWindow() {
89        super.onAttachedToWindow();
90        if (getVisibility() == View.VISIBLE)
91            startAnimation();
92    }
93
94    @Override
95    protected void onDetachedFromWindow() {
96        super.onDetachedFromWindow();
97        stopAnimation();
98    }
99
100    private void startAnimation() {
101        startAnimation(mObjectAnimator1);
102        startAnimation(mObjectAnimator2);
103        startAnimation(mObjectAnimator3);
104        mImage1.setVisibility(View.VISIBLE);
105        mImage2.setVisibility(View.VISIBLE);
106        mImage3.setVisibility(View.VISIBLE);
107    }
108
109    private void stopAnimation() {
110        stopAnimation(mObjectAnimator1, mImage1);
111        stopAnimation(mObjectAnimator2, mImage2);
112        stopAnimation(mObjectAnimator3, mImage3);
113        mImage1.setVisibility(View.GONE);
114        mImage2.setVisibility(View.GONE);
115        mImage3.setVisibility(View.GONE);
116    }
117
118    private void startAnimation(Animator animator) {
119        if (!animator.isStarted()) {
120            animator.start();
121        }
122    }
123
124    private void stopAnimation(Animator animator, View view) {
125        if (animator.isStarted()) {
126            animator.cancel();
127            setDropScale(view);
128        }
129    }
130}
131