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  • Android Service Intent must be explicit的解决方法

    今天在学习Android的Service组件的时候,在AndroidMainfest.xml中定义了

           <service
                android:name=".BindService"
                android:enabled="true"
                android:exported="true" >
                <intent-filter>
                    <action android:name="com.example.user.firstapp.FIRST_SERVICE"/>
                </intent-filter>
            </service>

     然后在activity中用如下代码绑定service:

    final Intent intent = new Intent();
    intent.setAction("com.example.user.firstapp.FIRST_SERVICE");
    bindService(intent,coon,Service.BIND_AUTO_CREATE);

       这时候会报错:

            IllegalArgumentException: Service Intent must be explicit

            经过查找相关资料,发现是因为Android5.0中service的intent一定要显性声明,当这样绑定的时候不会报错。

    final Intent intent = new Intent(this,BindService.class);
    bindService(intent,coon,Service.BIND_AUTO_CREATE)

    http://blog.android-develop.com/2014/10/android-l-api-21-javalangillegalargumen.html上看到一个解决方法,可以将隐性调用变成显性调用。先定义一个函数:

    /***
         * Android L (lollipop, API 21) introduced a new problem when trying to invoke implicit intent,
         * "java.lang.IllegalArgumentException: Service Intent must be explicit"
         *
         * If you are using an implicit intent, and know only 1 target would answer this intent,
         * This method will help you turn the implicit intent into the explicit form.
         *
         * Inspired from SO answer: http://stackoverflow.com/a/26318757/1446466
         * @param context
         * @param implicitIntent - The original implicit intent
         * @return Explicit Intent created from the implicit original intent
         */
        public static Intent createExplicitFromImplicitIntent(Context context, Intent implicitIntent) {
            // Retrieve all services that can match the given intent
            PackageManager pm = context.getPackageManager();
            List<ResolveInfo> resolveInfo = pm.queryIntentServices(implicitIntent, 0);
     
            // Make sure only one match was found
            if (resolveInfo == null || resolveInfo.size() != 1) {
                return null;
            }
     
            // Get component info and create ComponentName
            ResolveInfo serviceInfo = resolveInfo.get(0);
            String packageName = serviceInfo.serviceInfo.packageName;
            String className = serviceInfo.serviceInfo.name;
            ComponentName component = new ComponentName(packageName, className);
     
            // Create a new intent. Use the old one for extras and such reuse
            Intent explicitIntent = new Intent(implicitIntent);
     
            // Set the component to be explicit
            explicitIntent.setComponent(component);
     
            return explicitIntent;
        }

    然后调用

    final Intent intent = new Intent();
    intent.setAction("com.example.user.firstapp.FIRST_SERVICE");
    final Intent eintent = new Intent(createExplicitFromImplicitIntent(this,intent));
    bindService(eintent,conn, Service.BIND_AUTO_CREATE);

    这样也可以解决问题。

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  • 原文地址:https://www.cnblogs.com/zhujiabin/p/6072819.html
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