背景一
今天调试apk 发现发送多个文件，资源管理器会闪退
查看 log
01-19 02:11:25.328 1777 1777 E AndroidRuntime: FATAL EXCEPTION: main
01-19 02:11:25.328 1777 1777 E AndroidRuntime: Process: com.android.rk, PID: 1777
01-19 02:11:25.328 1777 1777 E AndroidRuntime: android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at android.app.ContextImpl.startActivity(ContextImpl.java:912)
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at android.app.ContextImpl.startActivity(ContextImpl.java:888)
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at android.content.ContextWrapper.startActivity(ContextWrapper.java:379)
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at com.android.rk.ShareIntent.shareMultFile(ShareIntent.java:47)
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at com.android.rk.RockExplorer.shareFiles(RockExplorer.java:1589)
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at com.android.rk.RockExplorer.access$1700(RockExplorer.java:89)
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at com.android.rk.RockExplorer$15.onClick(RockExplorer.java:1545)
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at android.view.View.performClick(View.java:6597)
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at android.view.View.performClickInternal(View.java:6574)
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at android.view.View.access$3100(View.java:778)
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at android.view.View$PerformClick.run(View.java:25885)
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at android.os.Handler.handleCallback(Handler.java:873)
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:99)
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at android.os.Looper.loop(Looper.java:193)
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:6718)
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
01-19 02:11:25.328 1777 1777 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
01-19 02:11:25.324 479 1197 W ActivityManager: Force finishing activity com.android.rk/.RockExplorer
01-19 02:11:25.321 479 1197 D PowerManagerService: acquireWakeLockInternal: lock=217838472, flags=0x1, tag="*launch*", ws=WorkSource{1000}, uid=1000, pid=479
01-19 02:11:25.321 479 1197 D PowerManagerService: updateWakeLockSummaryLocked: mWakefulness=Awake, mWakeLockSummary=0x1
01-19 02:11:25.321 479 1197 D PowerManagerService: updateUserActivitySummaryLocked: mWakefulness=Awake, mUserActivitySummary=0x1, nextTimeout=2147593254 (in 2147476552 ms)
01-19 02:11:25.320 479 1197 D PowerManagerService: updateDisplayPowerStateLocked: mDisplayReady=true, policy=3, mWakefulness=1, mWakeLockSummary=0x1, mUserActivitySummary=0x1, mBootCompleted=true, screenBrightnessOverride=-1, useAutoBrightness=false, mScreenBrightnessBoostInProgress=false, mIsVrModeEnabled= false, sQuiescent=false
01-19 02:11:25.320 479 1197 D PowerManagerService: Acquiring suspend blocker "PowerManagerService.WakeLocks".
二 、问题定位
从log中看，01-19 02:11:25.328 1777 1777 E AndroidRuntime: android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?
发现，Context中有一个startActivity方法，Activity继承自Context，重载了startActivity方法。如果使用Activity的startActivity方法，不会有任何限制，而如果使用Context的startActivity方法的話，就需要开启一个新的的task，遇到这个异常，是因为使用了Context的startActivity方法。解决办法是，加一个flag。
代码：
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK );
这样就可以在新的task里面启动这个Activity了。
加了之后发现还是不行，
继续看代码
Intent intent = new Intent(Intent.ACTION_SEND_MULTIPLE);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
intent.setType(mFileType);
mcontext.startActivity(Intent.createChooser(intent, mcontext.getString(R.string.edit_bluetooth)));
这块逻辑需要完善一下。
Intent intent = new Intent(Intent.ACTION_SEND_MULTIPLE);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
intent.setType(mFileType);
- //mcontext.startActivity(Intent.createChooser(intent, mcontext.getString(R.string.edit_bluetooth)));
+ Intent sendIntent = Intent.createChooser(intent, mcontext.getString(R.string.edit_bluetooth));
+ if (Build.VERSION.SDK_INT > Build.VERSION_CODES.O_MR1) {
+ sendIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+ }
+ mcontext.startActivity(sendIntent);
三、搞定。
