从Service启动Activity

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

该方法会报错

E/AndroidRuntime: FATAL EXCEPTION: Timer-0 Process: com.study.study, PID: 32733 android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?

好吧，按照AS的友情提示，添加上intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

Intent intent = new Intent(MyService.this, MainActivity.class); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(intent);

虽说这样解决了启动Activity的问题，但是这样有一个弊端，会产生新的Task，相当于又启动了一个任务，这也就导致程序的内存增大。