之前做音乐播放器的需求中有要通知栏部分，发现不同手机显示的系统通知栏千奇百怪不统一，需要适配。分析发现目前大部分手机通知栏不是白色就是深色，因此经过考虑定义两种不同的布局，根据不同通知栏背景颜色来创建不同的RemoteViews。我们可以自定义Notification，并且可以设置contentView以及bigContentView从而达到我们想要的布局以及背景颜色。
RemoteViews仅支持FrameLayout、LinearLayout、RelativeLayout三种布局控件和AnalogClock、Chronometer、Button、ImageButton、ImageView、ProgressBar、TextView、ViewFlipper、ListView、GridView、StackView和AdapterViewFlipper这些显示控件，不支持这些类的子类或Android提供的其他控件，否则会引起异常。
下面从我的需求实现来实现两种布局：
深色RemoteViews layout.xml
布局的高度最高应该不超过256dp，但是有些手机锁屏显示不全，因此我限制在64dp，基本上不会有锁屏显示不全问题。
白色RemoteViewslayout.xml
基本布局只改变了背景颜色和图片。
白色效果如图：
这里我的需求是音频类的通知栏所以自定义的notication的style为MediaStyle
notificationBuilder
.setStyle(new android.support.v4.media.app.NotificationCompat.MediaStyle()
// .setShowActionsInCompactView(
// new int[]{0, 1, 2})
.setMediaSession(mSessionToken))；
看一下自定义的Notification：
public Notification createNotification() {
Log.d(TAG, "createNotification. mMediaMetadata=" + mMediaMetadata);
// 创建通知栏
if (mMediaMetadata == null || mPlaybackState == null) {
return null;
}
// Notification channels are only supported on Android O+.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
createNotificationChannel();//Android O以上必须要创建NotificationChannel
}
final NotificationCompat.Builder notificationBuilder =
new NotificationCompat.Builder(mMusicService, CHANNEL_ID);
RemoteViews normalView;
if(isDarkNotificationTheme){//判断是否使用深色通知栏
normalView = new RemoteViews(mMusicService.getPackageName(), R.layout.normal_notification);
}else{
normalView = new RemoteViews(mMusicService.getPackageName(), R.layout.normal_notification_white);
}
normalView.setOnClickPendingIntent(R.id.widget_prev, mPreviousIntent);
normalView.setOnClickPendingIntent(R.id.widget_next, mNextIntent);
if (mPlaybackState.getState() == PlaybackStateCompat.STATE_PLAYING) {
if(NotifiationColorUtil.isDarkNotificationTheme(mMusicService)){
normalView.setOnClickPendingIntent(R.id.widget_play, mPauseIntent);
normalView.setImageViewResource(R.id.widget_play,R.drawable.audioplayer_play_playing_white);
}else{
normalView.setOnClickPendingIntent(R.id.widget_play, mPauseIntent);
normalView.setImageViewResource(R.id.widget_play,R.drawable.audioplayer_play_playing_black);
}
} else {
if(NotifiationColorUtil.isDarkNotificationTheme(mMusicService)){
normalView.setOnClickPendingIntent(R.id.widget_play, mPlayIntent);
normalView.setImageViewResource(R.id.widget_play,R.drawable.audioplayer_play_pause_white);
}else{
normalView.setOnClickPendingIntent(R.id.widget_play, mPlayIntent);
normalView.setImageViewResource(R.id.widget_play,R.drawable.audioplayer_play_pause_black);
}
}
MediaDescriptionCompat description = mMediaMetadata.getDescription();
normalView.setTextViewText(R.id.widget_title,getAppName(mMusicService));
normalView.setTextViewText(R.id.widget_artist,description.getTitle());
Bitmap art = null;
if (description.getIconUri() != null) {
// This sample assumes the iconUri will be a valid URL formatted String, but
// it can actually be any valid Android Uri formatted String.
// async fetch the album art icon
String artUrl = description.getIconUri().toString();
art = AlbumArtCache.getInstance().getBigImage(artUrl);
if (art == null) {
// use a placeholder art while the remote art is being downloaded
art = BitmapFactory.decodeResource(mMusicService.getResources(),
R.drawable.audioplayer_ic_notification);
}
}
notificationBuilder
.setStyle(new android.support.v4.media.app.NotificationCompat.MediaStyle()
// .setShowActionsInCompactView(
// new int[]{0, 1, 2})
.setMediaSession(mSessionToken))
.setPriority(NotificationCompat.PRIORITY_MAX)
.setColor(mNotificationColor)
.setSmallIcon(R.drawable.audioplayer_ic_notification)
.setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
.setContentIntent(createContentIntent(description));
normalView.setImageViewBitmap(R.id.widget_album,art);
setNotificationPlaybackState(notificationBuilder);
Notification notification=notificationBuilder.build();
notification.contentView=normalView;//将自定义的view设置给notification
notification.bigContentView=normalView;//将自定义的view设置给notification
return notification;
}
@RequiresApi(Build.VERSION_CODES.O)
public void createNotificationChannel() {
if (mNotificationManager.getNotificationChannel(CHANNEL_ID) == null) {
NotificationChannel notificationChannel =
new NotificationChannel(CHANNEL_ID,
"YOUR_Channel_ID",
NotificationManager.IMPORTANCE_LOW);
notificationChannel.setLockscreenVisibility(Notification.VISIBILITY_SECRET);
notificationChannel.setDescription("Channel ID for YOU");
mNotificationManager.createNotificationChannel(notificationChannel);
}
}
通过以上基本能适配大部分手机通知栏。
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