检测某个应用是否开机启动

ComponentName mComponentName = new ComponentName("xx.xx.xx",
"xx.xx.xx.receivers.BootReceiver");

int a = getPackageManager().getComponentEnabledSetting(mComponentName);

3种状态

public static final int COMPONENT_ENABLED_STATE_DEFAULT = 0;
public static final int COMPONENT_ENABLED_STATE_ENABLED = 1;
public static final int COMPONENT_ENABLED_STATE_DISABLED = 2;

另外：data/system/package.xml 在这里能找出各个应用所对应的全部权限以及其他信息。