Question

首先我使用Activity启动FLAG_ACTIVITY_NEW_TASK，然后使用命令＆＃39; adb shell dumpsys Activity＆＃39;最后我在一个任务中找到两个活动。

 Intent intent = new Intent(this, Main2Activity.class);
 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 startActivity(intent);

这些Activity是正常的，我没有修改它们。这些是堆栈信息。

ACTIVITY MANAGER ACTIVITIES (dumpsys activity activities)
Display #0 (activities from top to bottom):
  Stack #1:
  mFullscreen=true
  mBounds=null
    Task id #2493
    mFullscreen=true
    mBounds=null
    mMinWidth=-1
    mMinHeight=-1
    mLastNonFullscreenBounds=null
    * TaskRecord{cb64df8 #2493 A=com.example.flag U=0 StackId=1 sz=2}
      userId=0 effectiveUid=u0a63 mCallingUid=2000 mUserSetupComplete=true mCallingPackage=null
      affinity=com.example.flag
      intent={act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.example.flag/.MainActivity}
      realActivity=com.example.flag/.MainActivity
      autoRemoveRecents=false isPersistable=true numFullscreen=2 taskType=0 mTaskToReturnTo=1
      rootWasReset=false mNeverRelinquishIdentity=true mReuseTask=false mLockTaskAuth=LOCK_TASK_AUTH_PINNABLE
      Activities=[ActivityRecord{b786d24 u0 com.example.flag/.MainActivity t2493}, ActivityRecord{afe6f61 u0 com.example.flag/.Main2Activity t2493}]
      askedCompatMode=false inRecents=true isAvailable=true
      lastThumbnail=null lastThumbnailFile=/data/system_ce/0/recent_images/2493_task_thumbnail.png
      stackId=1
      hasBeenVisible=true mResizeMode=RESIZE_MODE_RESIZEABLE isResizeable=true firstActiveTime=1499670460422 lastActiveTime=1499670460422 (inactive for 23s)
      * Hist #1: ActivityRecord{afe6f61 u0 com.example.flag/.Main2Activity t2493}
          packageName=com.example.flag processName=com.example.flag
          launchedFromUid=10063 launchedFromPackage=com.example.flag userId=0
          app=ProcessRecord{b30f2d1 11785:com.example.flag/u0a63}
          Intent { flg=0x10000000 cmp=com.example.flag/.Main2Activity }
          frontOfTask=false task=TaskRecord{cb64df8 #2493 A=com.example.flag U=0 StackId=1 sz=2}
          taskAffinity=com.example.flag
          realActivity=com.example.flag/.Main2Activity
          baseDir=/data/app/com.example.flag-1/base.apk
          dataDir=/data/user/0/com.example.flag
          stateNotNeeded=false componentSpecified=true mActivityType=0
          compat={480dpi} labelRes=0x7f060021 icon=0x7f030000 theme=0x7f0800a3
          config={1.0 460mcc1mnc [zh_CN_#Hans,en_US,zh_TW_#Hant] ldltr sw360dp w360dp h616dp 480dpi nrml long port finger -keyb/v/h -nav/h s.8}
          taskConfigOverride={1.0 ?mcc?mnc ?localeList ?layoutDir ?swdp ?wdp ?hdp ?density ?lsize ?long ?orien ?uimode ?night ?touch ?keyb/?/? ?nav/?}
          taskDescription: iconFilename=null label="null" color=ff3f51b5
          launchFailed=false launchCount=1 lastLaunchTime=-23s446ms
          haveState=false icicle=null
          state=RESUMED stopped=false delayedResume=false finishing=false
          keysPaused=false inHistory=true visible=true sleeping=false idle=true mStartingWindowState=STARTING_WINDOW_NOT_SHOWN
          fullscreen=true noDisplay=false immersive=false launchMode=0
          frozenBeforeDestroy=false forceNewConfig=false
          mActivityType=APPLICATION_ACTIVITY_TYPE
          waitingVisible=false nowVisible=true lastVisibleTime=-22s952ms
          resizeMode=RESIZE_MODE_RESIZEABLE
      * Hist #0: ActivityRecord{b786d24 u0 com.example.flag/.MainActivity t2493}
          packageName=com.example.flag processName=com.example.flag
          launchedFromUid=2000 launchedFromPackage=null userId=0
          app=ProcessRecord{b30f2d1 11785:com.example.flag/u0a63}
          Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.example.flag/.MainActivity }
          frontOfTask=true task=TaskRecord{cb64df8 #2493 A=com.example.flag U=0 StackId=1 sz=2}
          taskAffinity=com.example.flag
          realActivity=com.example.flag/.MainActivity
          baseDir=/data/app/com.example.flag-1/base.apk
          dataDir=/data/user/0/com.example.flag
          stateNotNeeded=false componentSpecified=true mActivityType=0
          compat={480dpi} labelRes=0x7f060021 icon=0x7f030000 theme=0x7f0800a3
          config={1.0 460mcc1mnc [zh_CN_#Hans,en_US,zh_TW_#Hant] ldltr sw360dp w360dp h616dp 480dpi nrml long port finger -keyb/v/h -nav/h s.8}
          taskConfigOverride={1.0 ?mcc?mnc ?localeList ?layoutDir ?swdp ?wdp ?hdp ?density ?lsize ?long ?orien ?uimode ?night ?touch ?keyb/?/? ?nav/?}
          taskDescription: iconFilename=null label="null" color=ff3f51b5
          launchFailed=false launchCount=0 lastLaunchTime=-57s646ms
          haveState=true icicle=Bundle[mParcelledData.dataSize=604]
          state=STOPPED stopped=true delayedResume=false finishing=false
          keysPaused=false inHistory=true visible=false sleeping=false idle=true mStartingWindowState=STARTING_WINDOW_SHOWN
          fullscreen=true noDisplay=false immersive=false launchMode=0
          frozenBeforeDestroy=false forceNewConfig=false
          mActivityType=APPLICATION_ACTIVITY_TYPE
          waitingVisible=false nowVisible=false lastVisibleTime=-56s921ms
          resizeMode=RESIZE_MODE_RESIZEABLE

Answer 1

此标志仅在新任务中启动活动之前已启动并添加到堆栈中。如果活动为启动是在Backstack上，则不会启动新的活动；而是将当前任务简单地带到屏幕上显示的是其上次进入的状态。这不是以前还是不是我的堆栈然后将创建一个新的新任务中的活动实例。

尽管如果您想始终启动新活动，则可以，

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK|FLAG_ACTIVITY_MULTIPLE_TASK)

这将始终在新任务中启动活动。

Answer 2

Ümañgßürmån的答案是正确的。

    <activity
        android:name=".Main2Activity"
        android:taskAffinity="com.some.new" />

除了设置标志Intent.FLAG_ACTIVITY_NEW_TASK之外，您还必须在清单中设置“ android：taskAffinity”。

当我发现它时，出于某种原因，它在这里被否决为-1。

https://developer.android.com/guide/topics/manifest/activity-element.html#aff

Answer 3

您需要添加标志组合：

Intent intent = new Intent(this, Main2Activity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);

Answer 4

我这样做是这样的：

val intent = Intent(this, DrawActivity::class.java)
intent.flags = Intent.FLAG_ACTIVITY_MULTIPLE_TASK or Intent.FLAG_ACTIVITY_NEW_TASK
startActivity(intent)

将这两行添加到清单的活动标签

android:launchMode="singleTask"
android:taskAffinity="com.draw.new"

<activity
  android:name=".activity.DrawingActivity"
  android:launchMode="singleTask"
  android:taskAffinity="com.draw.new"/>

Answer 5

这是您的操作方式：

<activity
    android:name=".Main2Activity"
    android:taskAffinity="com.some.new" />

使用标记FLAG_ACTIVITY_NEW_TASK启动活动，新活动没有在新任务中执行

5 个答案: