android-activity之singleTask启动模式

最新推荐文章于 2025-05-05 12:56:38 发布

wangpanbaoding

最新推荐文章于 2025-05-05 12:56:38 发布

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分类专栏： android 文章标签： activity启动模式

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本文详细介绍了在配置清单文件中将ActivityA的启动模式设置为singleTask后，应用启动流程的变化。通过dumpsys activity activities命令观察不同Activity之间的堆栈关系，展示了设置singleTask模式后，同一任务内的Activity如何被复用，避免了重复启动，提高了应用性能。

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配置清单文件中设置ActivityA启动模式为singleTask
应用启动，打开ActivityA
ACTIVITY MANAGER ACTIVITIES (dumpsys activity activities)
Display #0 (activities from top to bottom):
Stack #26:
    Task id #179
    * TaskRecord{5444049 #179 A=com.wp.launchmode U=0 sz=1}
      * Hist #0: ActivityRecord{a290650 u0 com.wp.launchmode/.ActivityA t179}

Stack #0:

打开ActivityB
ACTIVITY MANAGER ACTIVITIES (dumpsys activity activities)
Display #0 (activities from top to bottom):
Stack #26:
    Task id #179
    * TaskRecord{5444049 #179 A=com.wp.launchmode U=0 sz=2}
      * Hist #1: ActivityRecord{b807b38 u0 com.wp.launchmode/.ActivityB t179}
      * Hist #0: ActivityRecord{a290650 u0 com.wp.launchmode/.ActivityA t179}

Stack #0:

打开ActivityC
ACTIVITY MANAGER ACTIVITIES (dumpsys activity activities)
Display #0 (activities from top to bottom):
Stack #26:
    Task id #179
    * TaskRecord{5444049 #179 A=com.wp.launchmode U=0 sz=3}
      * Hist #2: ActivityRecord{1925930 u0 com.wp.launchmode/.ActivityC t179}
      * Hist #1: ActivityRecord{b807b38 u0 com.wp.launchmode/.ActivityB t179}
      * Hist #0: ActivityRecord{a290650 u0 com.wp.launchmode/.ActivityA t179}

Stack #0:

打开ActivityD
ACTIVITY MANAGER ACTIVITIES (dumpsys activity activities)
Display #0 (activities from top to bottom):
Stack #26:
    Task id #179
    * TaskRecord{5444049 #179 A=com.wp.launchmode U=0 sz=4}
      * Hist #3: ActivityRecord{4b5831f u0 com.wp.launchmode/.ActivityD t179}
      * Hist #2: ActivityRecord{1925930 u0 com.wp.launchmode/.ActivityC t179}
      * Hist #1: ActivityRecord{b807b38 u0 com.wp.launchmode/.ActivityB t179}
      * Hist #0: ActivityRecord{a290650 u0 com.wp.launchmode/.ActivityA t179}

Stack #0:

打开ActivityA
ACTIVITY MANAGER ACTIVITIES (dumpsys activity activities)
Display #0 (activities from top to bottom):
Stack #26:
    Task id #179
    * TaskRecord{5444049 #179 A=com.wp.launchmode U=0 sz=1}
      * Hist #0: ActivityRecord{a290650 u0 com.wp.launchmode/.ActivityA t179}

Stack #0: