android - 在锁定屏幕中无法单击通知操作按钮

Question

为了更好地支持 Android 5 通知，我现在将应用的通知可见性设置为“公开”。在考虑了 Lollipop Notification setVisibility() Does Not Work? 上的答案之后，通知现在按预期显示。但是，当我想单击通知的操作按钮时，我首先必须解锁不需要的设备。 ( Action 显示密码数据库已解锁， Action 按钮将锁定数据库。)

这是我用来创建通知的代码(使用 Xamarin 的 Android Mono):

NotificationCompat.Builder builder =
                new NotificationCompat.Builder(this)
                    .SetOngoing(true)
                    .SetSmallIcon(Resource.Drawable.ic_notify)
                    .SetLargeIcon(...)
                    .SetVisibility((int)Android.App.NotificationVisibility.Public)
                    .SetContentTitle(...)
                    .SetContentText(...);

builder.AddAction(Resource.Drawable.ic_action_lock, GetString(Resource.String.menu_lock), PendingIntent.GetBroadcast(this, 0, new Intent(Intents.LockDatabase), PendingIntentFlags.UpdateCurrent));

this 是一个服务实例。

我知道 MediaStyle 通知有可点击的按钮，但使用 MediaStyle 感觉就像黑客一样，即使它与媒体无关。有什么方法可以使我的操作在锁定屏幕上可用？

Answer 1

不是添加操作，而是定义您自己的通知布局并连接一个 pendingIntent 以通过 RemoteView 触发它。 (下面的示例基于 Holo 外观和感觉，仍然需要针对 Lollipop 进行更新。您可以在 sdk 的 android-21/data/res 文件夹中找到所有正确的资源)

// NOTE: while creating pendingIntent: requestcode must be different!
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(myService)
        .setSmallIcon(R.drawable.notification_icon).setContentTitle("My Title")
        .setContentText("Service running in the background");
Intent openIntent = new Intent(MainActivity.this, MainActivity.class);
PendingIntent pOpenIntent = PendingIntent.getActivity(this, 0, openIntent, 0);
mBuilder.setContentIntent(pOpenIntent);

// Notification with exit button if supported
String ACTION_NOTIFICATION_EXITACTIVITY = "com.jmols.example.exitactivity";
Intent exitIntent = new Intent();
exitIntent.setAction(ACTION_NOTIFICATION_EXITACTIVITY);
PendingIntent pExitIntent = PendingIntent.getBroadcast(this, 1, exitIntent, 0);
RemoteViews view = new RemoteViews(getPackageName(), R.layout.notification_discoveryservice);
view.setOnClickPendingIntent(R.id.notification_closebtn_ib, pExitIntent);
mBuilder.setContent(view);

使用通知布局:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:internal="http://schemas.android.com/apk/prv/res/android"
    android:id="@+id/status_bar_latest_event_content"
    android:layout_width="match_parent"
    android:layout_height="64dp"
    internal:layout_maxHeight="64dp"
    internal:layout_minHeight="64dp" >

    <ImageView
        android:id="@+id/notification_icon_iv"
        android:layout_width="64dp"
        android:layout_height="64dp"
        android:padding="10dp"
        android:layout_alignParentLeft="true"
        android:scaleType="center"
        android:src="@drawable/notification_icon"
        android:background="#3333B5E5" />

    <ImageButton
        android:id="@+id/notification_closebtn_ib"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:scaleType="centerInside"
        android:src="@drawable/notification_exitbtn"
        android:background="@drawable/notification_imagebtn_bg"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="fill_vertical"
        android:gravity="top"
        android:minHeight="64dp"
        android:layout_toRightOf="@id/notification_icon_iv"
        android:layout_toLeftOf="@id/notification_closebtn_ib"
        android:orientation="vertical"
        android:paddingBottom="2dp"
        android:paddingEnd="8dp"
        android:paddingTop="2dp" >

        <TextView
            android:id="@+id/notification_title_tv"
            style="@android:style/TextAppearance.StatusBar.EventContent.Title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="8dp"
            android:ellipsize="marquee"
            android:paddingTop="6dp"
            android:singleLine="true"
            android:text="JMols Service" />

        <TextView
            android:id="@+id/notification_contenttext_tv"
            style="@android:style/TextAppearance.StatusBar.EventContent"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="8dp"
            android:ellipsize="marquee"
            android:singleLine="true"
            android:text="Service running in the background" />

    </LinearLayout>

</RelativeLayout>

通知背景为:

<selector xmlns:android="http://schemas.android.com/apk/res/android"
    android:exitFadeDuration="@android:integer/config_mediumAnimTime">

    <item android:state_pressed="true"  android:drawable="@drawable/notification_bg_normal_pressed" />
    <item android:state_pressed="false" android:drawable="@drawable/notification_bg_normal" />
</selector>

通知图片按钮背景为:

<selector xmlns:android="http://schemas.android.com/apk/res/android"
    android:exitFadeDuration="@android:integer/config_mediumAnimTime">

    <item android:state_pressed="true"  android:drawable="@drawable/notification_imagebtn_bg_normal_pressed" />
    <item android:state_pressed="false" android:drawable="@drawable/notification_imagebtn_bg_normal" />
</selector>