1.错误描述
今天在Android4.4 的小米4手机上运行我的程序的时候没有报错,而在Android 5.1的华为P7上运行我的程序的时候报了以下的错误,错误提示如下:
E/AndroidRuntime(12500): FATAL EXCEPTION: mainE/AndroidRuntime(12500): Process: com.xtc.watch, PID: 12500E/AndroidRuntime(12500): java.lang.IllegalArgumentException: Service Intent must be explicit: Intent { act=com.xtc.kuwo.watch.MUSIC_PLAY_SERVICE (has extras) }E/AndroidRuntime(12500): at android.app.ContextImpl.validateServiceIntent(ContextImpl.java:1847)E/AndroidRuntime(12500): at android.app.ContextImpl.startServiceCommon(ContextImpl.java:1876)E/AndroidRuntime(12500): at android.app.ContextImpl.startService(ContextImpl.java:1860)E/AndroidRuntime(12500): at android.content.ContextWrapper.startService(ContextWrapper.java:516)E/AndroidRuntime(12500): at com.xtc.watch.kuwo.activity.WatchMusicPlay.pauseMusic(WatchMusicPlay.java:314)E/AndroidRuntime(12500): at com.xtc.watch.kuwo.activity.WatchMusicPlay.access$600(WatchMusicPlay.java:32)E/AndroidRuntime(12500): at com.xtc.watch.kuwo.activity.WatchMusicPlay$3.onClick(WatchMusicPlay.java:220)E/AndroidRuntime(12500): at android.view.View.performClick(View.java:4790)E/AndroidRuntime(12500): at android.view.View$PerformClick.run(View.java:19933)E/AndroidRuntime(12500): at android.os.Handler.handleCallback(Handler.java:739)E/AndroidRuntime(12500): at android.os.Handler.dispatchMessage(Handler.java:95)E/AndroidRuntime(12500): at android.os.Looper.loop(Looper.java:135)E/AndroidRuntime(12500): at android.app.ActivityThread.main(ActivityThread.java:5569)E/AndroidRuntime(12500): at java.lang.reflect.Method.invoke(Native Method)E/AndroidRuntime(12500): at java.lang.reflect.Method.invoke(Method.java:372)E/AndroidRuntime(12500): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:931)E/AndroidRuntime(12500): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:726)
而我启动Service的Intent代码如下所示:
Intent intent = new Intent(); intent.setAction(MUSIC_PLAY_SERVICE); intent.putExtra("MSG", Constants.PlayerMsg.PAUSE_MSG); //暂停播放音乐 intent.putExtra("musicURL", musicURL); //歌曲URL startService(intent);
2.错误原因
有些时候我们使用Service的时需要采用隐私启动的方式,但是Android 5.0一出来后,其中有个特性就是Service Intent must be explitict,也就是说从Android Lollipop版本(Android 5.0)开始,service服务必须采用显示方式启动。
而android源码是这样写的(源码位置:sdk/sources/android-21/android/app/ContextImpl.java):
startService(Intent service)方法
startService(Intent service)方法代码如下
@Override public ComponentName startService(Intent service) { warnIfCallingFromSystemProcess(); return startServiceCommon(service, mUser); }
startServiceCommon(Intent service, UserHandle user)方法
上面的startService(Intent service)方法调用的是startServiceCommon(Intent service, UserHandle user),代码如下所示:
private ComponentName startServiceCommon(Intent service, UserHandle user) { try { validateServiceIntent(service); service.prepareToLeaveProcess(); ComponentName cn = ActivityManagerNative.getDefault().startService( mMainThread.getApplicationThread(), service, service.resolveTypeIfNeeded(getContentResolver()), user.getIdentifier()); if (cn != null) { if (cn.getPackageName().equals("!")) { throw new SecurityException( "Not allowed to start service " + service + " without permission " + cn.getClassName()); } else if (cn.getPackageName().equals("!!")) { throw new SecurityException( "Unable to start service " + service + ": " + cn.getClassName()); } } return cn; } catch (RemoteException e) { return null; } }
validateServiceIntent(Intent service)方法
上面的startServiceCommon(Intent service, UserHandle user)方法中调用的validateServiceIntent(Intent service)方法代码如下所示:
private void validateServiceIntent(Intent service) { if (service.getComponent() == null && service.getPackage() == null) { if (getApplicationInfo().targetSdkVersion >= Build.VERSION_CODES.LOLLIPOP) { IllegalArgumentException ex = new IllegalArgumentException( "Service Intent must be explicit: " + service); throw ex; } else { Log.w(TAG, "Implicit intents with startService are not safe: " + service + " " + Debug.getCallers(2, 3)); } } }
可以看得出来,就是在validateServiceIntent(Intent service)方法中判断如果大于Build.VERSION_CODES.LOLLIPOP版本的话,并且启动Service的Intent如果没有设置Component和Package的话就会跑出异常java.lang.IllegalArgumentException: Service Intent must be explicit:
3.解决方法
设置要启动Service的Intent的Action和packageName
Intent intent = new Intent(); intent.setAction(MUSIC_PLAY_SERVICE); intent.putExtra("MSG", Constants.PlayerMsg.PAUSE_MSG); //暂停播放音乐 intent.putExtra("musicURL", musicURL); //歌曲URL startService(intent);
改为:
Intent intent = new Intent(); intent.setAction(MUSIC_PLAY_SERVICE); //不加这句话的话 android 5.0以上会报:Service Intent must be explitict intent.setPackage(getPackageName()); intent.putExtra("MSG", Constants.PlayerMsg.PAUSE_MSG); //暂停播放音乐 intent.putExtra("musicURL", musicURL); //歌曲URL startService(intent);
以上代码就是加了一行
//不加这句话的话 android 5.0以上会报:Service Intent must be explitict intent.setPackage(getPackageName());
此方式是google官方推荐使用的解决方法。
在此附上地址供大家参考:http://developer.android.com/goo … tml#billing-service,有兴趣的可以去看看。
下面是http://developer.android.com/goo … tml#billing-service网站的截图,如下所示:
作者:欧阳鹏 欢迎转载,与人分享是进步的源泉!
转载请保留原文地址:http://blog.csdn.net/ouyang_peng
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