更改通知 RemoteViews 背景颜色

Question

我在使用应用程序主题更改背景颜色时遇到问题。

NotificationCompat.Builder nBuilder = new NotificationCompat.Builder(this);

TypedValue typedValue = new TypedValue();

getTheme().resolveAttribute(R.attr.colorPrimary, typedValue, true);

int iPrimaryColor = typedValue.data;

getTheme().resolveAttribute(R.attr.colorPrimaryDark, typedValue, true);

int iPrimaryDarkColor = typedValue.data;

Intent notIntent = new Intent(getApplicationContext(), MainActivity.class);
notIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

PendingIntent notOpenOnClick = PendingIntent.getActivity(getApplicationContext(), 0, notIntent, PendingIntent.FLAG_UPDATE_CURRENT);

RemoteViews smallContentView = new RemoteViews(getPackageName(), R.layout.notification_small);
RemoteViews bigContentView = new RemoteViews(getPackageName(), R.layout.notification_expanded);

nBuilder.setSmallIcon(R.drawable.not_icon)
    .setOngoing(true)
    .setContentTitle(getCurrentSong().getTitle())
    .setContentIntent(notOpenOnClick);

Notification not = nBuilder.build();

smallContentView.setInt(R.id.not_linLayout, "setBackgroundColor", iPrimaryColor);
smallContentView.setInt(R.id.not_imvDivider, "setBackgroundColor", iPrimaryDarkColor);

bigContentView.setInt(R.id.not_linLayout, "setBackgroundColor", iPrimaryColor);
bigContentView.setInt(R.id.not_imvDivider, "setBackgroundColor", iPrimaryDarkColor);

setListeners(smallContentView);
setListeners(bigContentView);

not.contentView = smallContentView;
not.bigContentView = bigContentView;

if (isPlaying()) {
    not.contentView.setImageViewResource(R.id.not_btnPlayPause, R.drawable.ic_pause_48dp);
    not.bigContentView.setImageViewResource(R.id.not_btnPlayPause, R.drawable.ic_pause_48dp);
}
else {
    not.contentView.setImageViewResource(R.id.not_btnPlayPause, R.drawable.ic_play_48dp);
    not.bigContentView.setImageViewResource(R.id.not_btnPlayPause, R.drawable.ic_play_48dp);
}

我已经试过了，但是通知的背景还是白色的。 ID 正确，View linLayout 是 LinearLayout。

请记住：整个代码是在一个服务中调用的！

谢谢！

Answer 1

通过在 API 24 之前的设备上利用 NotificationCompat.MediaStyle. It pulls the background color from the setColor() 调用（并在 API 24+ 设备上使用该颜色作为强调），可以更轻松地完成大部分工作.这也意味着您不再需要编写任何自定义 RemoteViews 代码，因为它仅依赖于您添加到媒体控件通知中的操作：

NotificationCompat.Builder nBuilder = new NotificationCompat.Builder(this);
nBuilder.setSmallIcon(R.drawable.not_icon)
  .setContentTitle(getCurrentSong().getTitle())
  .setContentIntent(notOpenOnClick);
// This is what sets the background color on <N devices
// It is an accent color on N+ devices
nBuilder.setColor(getResources().getColor(R.color.colorPrimary));
// Add actions via nBuilder.addAction()
// Set the style, setShowActionsInCompactView(0) means the first
// action you've added will be shown the non-expanded view
nBuilder.setStyle(new NotificationCompat.MediaStyle()
  .setShowActionsInCompactView(0));

您绝对应该通读所有可用于 MediaStyle and reivew the Best Practices in media playback I/O 2016 talk for example code and best practices around using notifications. Specifically at 30 minutes into the talk

的方法

Answer 2

setColorized 文档说：

Set whether this notification should be colorized. When set, the color set with setColor(int) will be used as the background color of this notification.

This should only be used for high priority ongoing tasks like navigation, an ongoing call, or other similarly high-priority events for the user.

For most styles, the coloring will only be applied if the notification is for a foreground service notification.

However, for MediaStyle and DecoratedMediaCustomViewStyle notifications that have a media session attached there is no such requirement.

Calling this method on any version prior to O will not have an effect on the notification and it won't be colorized.

科特林代码：

import android.support.v4.media.session.MediaSessionCompat
import android.support.v4.media.session.PlaybackStateCompat
import androidx.core.app.NotificationCompat
import androidx.media.app.NotificationCompat.DecoratedMediaCustomViewStyle

// create a MediaSession so that we can create a DecoratedMediaCustomViewStyle
val mediaSession = MediaSessionCompat(applicationContext,"tag")
mediaSession.setFlags(0)
mediaSession.setPlaybackState(PlaybackStateCompat.Builder()
        .setState(PlaybackStateCompat.STATE_NONE,0,0f)
        .build())

// create & display the colorized notification
notificationManager.notify(
        0,
        NotificationCompat
                .Builder(this,notificationChannel)
                .setStyle(DecoratedMediaCustomViewStyle()
                        .setMediaSession(mediaSession.sessionToken))
                .setSmallIcon(R.drawable.ic_app_foreground)
                .setColor(getColor(android.R.color.black))
                .setColorized(true)
                .setContentText("Hello, World!")
                .build())

....

// cleanup upon dismissing the notification
mediaSession.release()

更改通知 RemoteViews 背景颜色

Changing Notification RemoteViews Background Color

android

service

notifications

themes

android-remoteview