关于 StackOverflow 的问题和互联网上的指南有很多,包括 Android 自己的关于使此特定功能正常工作的文档。
我相信我已经遵循了这封信的所有说明和细微差别,但这里有一些我用来尝试解决问题的参考问题:
AIDL interface between two applications
Service not binding
Android: Binding to a remote service
我遇到的问题是无法定位服务本身。无论是否已经运行,我都遇到以下错误:
Unable to start service Intent { cmp=com.example.dumpsterfire/.DumpsterService } U=0: not found
这里是两个应用的相关配置
build.gradle.kts
plugins {
id("com.android.application")
id("kotlin-android")
}
android {
compileSdkVersion(30)
buildToolsVersion = "30.0.3"
defaultConfig {
applicationId = "com.example.dumpsterfire"
minSdkVersion(24)
targetSdkVersion(30)
versionCode = 1
versionName = "1.0"
testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
getByName("release") {
isMinifyEnabled = false
proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
}
}
compileOptions {
sourceCompatibility = JavaVersion.VERSION_1_8
targetCompatibility = JavaVersion.VERSION_1_8
}
kotlinOptions {
jvmTarget = "1.8"
}
}
dependencies {
implementation(fileTree("/libs") { include("*.jar", "*.aar") })
implementation("androidx.core:core-ktx:1.3.2")
implementation("androidx.appcompat:appcompat:1.2.0")
implementation("com.google.android.material:material:1.2.1")
implementation("androidx.constraintlayout:constraintlayout:2.0.4")
testImplementation("junit:junit:4.13.1")
androidTestImplementation("androidx.test.ext:junit:1.1.2")
androidTestImplementation("androidx.test.espresso:espresso-core:3.3.0")
}
AndroidManifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.dumpsterfire">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.DumpsterFire">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".DumpsterService"
android:enabled="true"
android:exported="true" />
</application>
</manifest>
DumpsterService.kt
class DumpsterService : Service() {
override fun onBind(intent: Intent?): IBinder {
return object : IDemoAidl.Stub() {
override fun printAcross(message: String?) {
Log.d("chaser", "Hello, I've been instructed to say:\n$message")
}
}
}
}
IDemoAidl.aidl
interface IDemoAidl {
void printAcross(String message);
}
MainActivity.kt
//...
override fun onCreate(savedInstanceState: Bundle?) {
//...
bindService(
Intent().setClassName("com.example.dumpsterfire", ".DumpsterService"),
connection,
BIND_AUTO_CREATE
)
}
val connection = object : ServiceConnection {
override fun onServiceConnected(name: ComponentName?, service: IBinder?) {
IDemoAidl.Stub.asInterface(service)
.printAcross("Assuming direct control")
}
override fun onServiceDisconnected(name: ComponentName?) {
Log.d("chaser", "host service terminated")
}
}
//...
IDemoAidl.aidl
interface IDemoAidl {
void printAcross(String message);
}
P.S. 我试图让有问题的服务在后台运行,并通过 adb shell 命令 dumpsys activity services
验证它的存在。它不会改变我收到的错误。
P.P.S. 我也试过:
答案 0 :(得分:2)
如果您在 Android 11 上对此进行测试,您的问题可能是您的客户端应用无法看到服务应用。为了让 this sample service client 在 Android 11 上找到 this sample service,我需要将 <queries>
元素添加到我客户端的清单中,以及服务应用程序的包:
<queries>
<package android:name="com.commonsware.android.r.embed.server" />
</queries>