Android 26(O)通知不显示动作图标

Question

随着Android 26(O)推出通知渠道,我一直在调查谷歌提供的 com.example.android.notificationchannels

此示例按预期工作,直到我尝试添加Action到示例应用程序中定义的辅助通知.

我的代码类似于: -

   /**
     * Build notification for secondary channel.
     *
     * @param title Title for notification.
     * @param body Message for notification.
     * @return A Notification.Builder configured with the selected channel and details
     */
    @RequiresApi(api = Build.VERSION_CODES.O)
    public Notification.Builder getNotification2(String title, String body) {
        return new Notification.Builder(getApplicationContext(), SECONDARY_CHANNEL)
                .setContentTitle(title)
                .setContentText(body)
                .setActions(buildAction())
                .setSmallIcon(getSmallIcon())
                .setAutoCancel(true);
    }

和buildAction(): -

   @TargetApi(Build.VERSION_CODES.KITKAT_WATCH)
    private Notification.Action buildAction() {

        final Intent intent = new Intent(this, SecondActivity.class);
        final PendingIntent pendingIntent =  PendingIntent.getActivity(this, 1729, intent, PendingIntent.FLAG_UPDATE_CURRENT );

        final Notification.Action myAction = new Notification.Action.Builder(R.drawable.ic_action_name, "RETRY", pendingIntent).build();

        return myAction;
    }

操作将显示并按预期工作,但操作标题旁边没有显示图标.

我做错了什么？

我的build.gradle文件如下所示: -

buildscript {
    repositories {
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0-alpha4'
    }
}

apply plugin: 'com.android.application'

repositories {
    jcenter()
}

dependencies {
    compile "com.android.support:support-v4:26.+"
    compile "com.android.support:support-v13:26.+"
    compile "com.android.support:cardview-v7:26.+"
    compile "com.android.support:appcompat-v7:26.+"
}

// The sample build uses multiple directories to
// keep boilerplate and common code separate from
// the main sample code.
List<String> dirs = [
    'main',     // main sample code; look here for the interesting stuff.
    'common',   // components that are reused by multiple samples
    'template'] // boilerplate code that is generated by the sample template process

android {
    compileSdkVersion 26
    buildToolsVersion "26.0.0"

    // Values declared here override the ones declared in AndroidManifest.xml
    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 26
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_7
        targetCompatibility JavaVersion.VERSION_1_7
    }

    sourceSets {
        main {
            dirs.each { dir ->
                java.srcDirs "src/${dir}/java"
                res.srcDirs "src/${dir}/res"
            }
        }
        androidTest.setRoot('tests')
        androidTest.java.srcDirs = ['tests/src']

    }

}

Android Studio的详细信息如下: -

Android Studio 3.0 Canary 4
Build #AI-171.4101728, built on June 15, 2017
JRE: 1.8.0_112-release-b736 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Mac OS X 10.11.6

Answer 1

自Nougat以来,通知操作不会显示图标.

您会注意到新通知中没有图标; 而是在通知阴影的受约束空间中为标签本身提供更多空间.但是,仍然需要通知操作图标,并继续在旧版Android和Android Wear等设备上使用.

来源:https://android-developers.googleblog.com/2016/06/notifications-in-android-n.html,elsis,mine.

总而言之,需要使用通知操作图标并使用:

• 在旧版Android上,
• 在可穿戴设备上,
• 在媒体风格通知中.