【完美解决系列】Service Intent must be explicit

在写Demo测试Service启动时，发现报了以下异常信息：

                                                                               Process: realmusic.ace.com.myapplication, PID: 3266
                                                                               java.lang.RuntimeException: Unable to start activity ComponentInfo{realmusic.ace.com.myapplication/realmusic.ace.com.myapplication.MainActivity}: java.lang.IllegalArgumentException: Service Intent must be explicit: Intent { act=realmusic.ace.com.myapplication.MyService }
                                                                                   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
                                                                                   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
                                                                                   at android.app.ActivityThread.-wrap11(ActivityThread.java)
                                                                                   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
                                                                                   at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                                   at android.os.Looper.loop(Looper.java:148)
                                                                                   at android.app.ActivityThread.main(ActivityThread.java:5417)
                                                                                   at java.lang.reflect.Method.invoke(Native Method)
                                                                                   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                                                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
                                                                                Caused by: java.lang.IllegalArgumentException: Service Intent must be explicit: Intent { act=realmusic.ace.com.myapplication.MyService }
                                                                                   at android.app.ContextImpl.validateServiceIntent(ContextImpl.java:1209)
                                                                                   at android.app.ContextImpl.startServiceCommon(ContextImpl.java:1238)
                                                                                   at android.app.ContextImpl.startService(ContextImpl.java:1222)
                                                                                   at android.content.ContextWrapper.startService(ContextWrapper.java:581)
                                                                                   at realmusic.ace.com.myapplication.MainActivity.onCreate(MainActivity.java:17)
                                                                                   at android.app.Activity.performCreate(Activity.java:6237)
                                                                                   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
                                                                                   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
                                                                                   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
                                                                                   at android.app.ActivityThread.-wrap11(ActivityThread.java) 
                                                                                   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
                                                                                   at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                                                   at android.os.Looper.loop(Looper.java:148) 
                                                                                   at android.app.ActivityThread.main(ActivityThread.java:5417) 
                                                                                   at java.lang.reflect.Method.invoke(Native Method) 
                                                                                   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
                                                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

启动的方式为：

        Intent intent = new Intent("realmusic.ace.com.myapplication.MyService");
        startService(intent);

解决方法：

修改使用Intent(Context packageContext, Class<?> cls)函数来设置Intent。系统源码如下：

public Intent(Context packageContext, Class<?> cls) {
        mComponent = new ComponentName(packageContext, cls);
    }

1、正确的启动Service：

        Intent intent = new Intent(MainActivity.this, MyService.class);
        startService(intent);

2、重点传入Service对应的Class，此例子为MyService类，即为Service Class。