android activity标签的一些属性

android activity 标签的一些属性

< activity android:allowTaskReparenting=["true" | "false"] android:alwaysRetainTaskState=["true" | "false"] android:clearTaskOnLaunch=["true" | "false"] android:configChanges=["mcc", "mnc", "locale", "touchscreen", "keyboard", "keyboardHidden", "navigation", "orientation", "screenLayout", "fontScale", "uiMode"] android:enabled=["true" | "false"] android:excludeFromRecents=["true" | "false"] android:exported=["true" | "false"] android:finishOnTaskLaunch=["true" | "false"] android:icon="drawable resource" android:label="string resource" android:launchMode=["multiple" | "singleTop" | "singleTask" | "singleInstance"] android:multiprocess=["true" | "false"] android:name="string" android:noHistory=["true" | "false"] android:permission="string" android:process="string" android:screenOrientation=["unspecified" | "user" | "behind" | "landscape" | "portrait" | "sensor" | "nosensor"] android:stateNotNeeded=["true" | "false"] android:taskAffinity="string" android:theme="resource or theme" android:windowSoftInputMode=["stateUnspecified", "stateUnchanged", "stateHidden", "stateAlwaysHidden", "stateVisible", "stateAlwaysVisible", "adjustUnspecified", "adjustResize", "adjustPan"] > . . .< /activity>

亲戚为任务的一个标识,表示活动与任务的从属关系.

android:allowTaskReparenting

是否可以将目标activity从启动它的那个Task移动到他自己定义的而且马上要显示的那个Task.如果为false,它就会留在启动它的那个Task中.

android:alwaysRetainTaskState

是否让系统保留任务的最后状态. 一般情况下, 在按home键后再次启动应用,系统会去除栈内所有在根活动之上的活动; 或者某任务经过一段时间没有被访问时也会被系统清除其他活动. 本选项仅对根活动有意义,其他活动包含此标签会被忽略.

android:clearTaskOnLaunch

是否在从 home 界面重新启动时清空Task. 如果为 true, 每次用户启动任务, 用户都被带到根活动.不管他们最后在做什么,也不管是按BACK或HOME键最后离开的它. 如果是 false, 则不会这样.