标签: android-remoteview

您好，我正在我的 Android 应用程序中显示自定义通知。但问题是自定义通知未显示。我看到了很多帖子，但没有找到与我的问题相关的任何答案。

我找不到问题出在哪里。你能看一下这个吗？

PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);

// display the notification
NotificationManager mNotificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);

RemoteViews contentView = new RemoteViews(getPackageName(), R.layout.custom_notification);
contentView.setImageViewResource(R.id.notificationIcon, Util.notificationBitmap);
contentView.setTextViewText(R.id.notificationTitle, Util.notificationTitle);
contentView.setTextViewText(R.id.notificationContent, notificationMessage);

NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context)
                    .setSmallIcon(R.drawable.ic_stat_logo)
                    .setContentTitle(Util.notificationTitle)
                    .setStyle(new NotificationCompat.BigTextStyle()
                    .bigText(notificationMessage))
                    .setAutoCancel(true)
                    .setDefaults(Notification.DEFAULT_SOUND)
                    .setContentText(notificationMessage);

mBuilder.setContent(contentView);
// build notification
mBuilder.setContentIntent(pendingIntent);
mNotificationManager.notify((int)SystemClock.currentThreadTimeMillis(), mBuilder.build());

自定义通知.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ImageView
        android:id="@+id/notificationIcon"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        />

    <TextView
        android:id="@+id/notificationTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@id/notificationIcon"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <TextView
        android:id="@+id/notificationContent"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/notificationTitle"
        android:layout_toRightOf="@id/notificationIcon"
        android:textAppearance="?android:attr/textAppearanceSmall" /> …

到目前为止，我一直在RemoteViews使用remoteViews.setImageViewBitmap(). 它总体上运行良好。

但是一些用户遇到了问题，我认为这是在加载非常大的位图时。无论如何，我已经将位图缓存到本地存储，所以我的想法是改用setImageViewUri()其他地方的建议。

但我无法让它工作......我只是得到一个空白的小部件。以下代码段说明了我在做什么（省略了一些上下文，但希望留下足够的内容）...

// Bitmap bmp is fetched from elsewhere... and then...

FileOutputStream fos = context.openFileOutput("img.png", Context.MODE_PRIVATE);
bmp.compress(Bitmap.CompressFormat.PNG, 100, fos);
fos.flush();
fos.close();

// ... later ...

// this works...
remoteViews.setImageViewBitmap(R.id.imageView, bmp);

// but this doesn't...
remoteViews.setImageViewUri(R.id.imageView, Uri.fromFile(new File(context.getFilesDir().getPath(), "img.png")));

编辑

尝试FileProvider按照以下 CommonsWare 的建议使用...

显现：

<provider
    android:name="android.support.v4.content.FileProvider"
    android:authorities="com.xyz.fileprovider"
    android:exported="false"
    android:grantUriPermissions="true">
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/file_paths" />
</provider>

xml/file_paths.xml:

<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <files-path name="cache" path="."/>
</paths>

代码：

File imagePath = new File(context.getFilesDir(), ".");
File newFile = …

我在使用Application-Theme更改Background-Color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 …

我用自定义视图做了一个通知，我需要在其中一个孩子上运行动画，但正如你所知RemoteViews，不允许直接访问所需的视图（start在其背景上调用方法），有谁知道如何访问视图或在其可绘制对象上调用提到的方法？
谢谢