Service Intent must be explicit的解决方法
16lz
2021-01-24
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)
在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。
PS:调用本地service是这样的,不知道其他程序隐性调用service时会不会也有类似的问题,待续。
另一种简单点的解决方法可参考另一篇日志。
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