通过Android发送电子邮件
我正在尝试从我的应用程序发送电子邮件,我一直收到这个异常-通过Android发送电子邮件,android,email,android-intent,Android,Email,Android Intent,我正在尝试从我的应用程序发送电子邮件,我一直收到这个异常- /AndroidRuntime: FATAL EXCEPTION: main Process: com.example.user.trackyournevi, PID: 4220 java.lang.NullPointerException: Attempt to invoke virtual me
/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.user.trackyournevi, PID: 4220
java.lang.NullPointerException: Attempt to invoke virtual method 'android.app.ActivityThread$ApplicationThread android.app.ActivityThread.getApplicationThread()' on a null object reference
at android.app.Activity.startActivityForResult(Activity.java:4283)
at android.app.Activity.startActivityForResult(Activity.java:4230)
at android.app.Activity.startActivity(Activity.java:4567)
at android.app.Activity.startActivity(Activity.java:4535)
at com.example.user.trackyournevi.services.CommaSeparatedValues.sentAttachedMail(CommaSeparatedValues.java:88)
at com.example.user.trackyournevi.services.CommaSeparatedValues.handleActionExport(CommaSeparatedValues.java:47)
at com.example.user.trackyournevi.MainActivity.onNavigationItemSelected(MainActivity.java:125)
at android.support.design.widget.NavigationView$1.onMenuItemSelected(NavigationView.java:151)
at android.support.v7.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:811)
at android.support.v7.view.menu.SubMenuBuilder.dispatchMenuItemSelected(SubMenuBuilder.java:84)
at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:152)
at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:958)
at android.support.design.internal.NavigationMenuPresenter$1.onClick(NavigationMenuPresenter.java:318)
at android.view.View.performClick(View.java:5697)
at android.view.View$PerformClick.run(View.java:22526)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7224)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
我对这一意图的理解是——
Intent email = new Intent(Intent.ACTION_SENDTO);
email.setType("plain/text");
email.putExtra(Intent.EXTRA_SUBJECT, "My Scannings");
email.putExtra(Intent.EXTRA_STREAM, Uri.parse(path));
email.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(Intent.createChooser(email , "Email:"));
我已检查,此参数中的非参数为null
请帮帮我首先,没有
纯文本
MIME类型。它是text/plain
。其次,ACTION\u SENDTO
需要一个Uri
(例如,mailto:
Uri
)。第三,关于崩溃,您似乎没有从有效位置调用startActivity()
。什么是commasepartedvalues
?Service@commonwareonNavigationItemSelected()
正在commasepartedvalues
上直接调用handleActionExport()
方法。如果CommaSeparatedValues
是一个服务,那么这将不合适,除非您对服务绑定采取了不同寻常的方法。也许你应该考虑编辑你的问题来发布整个代码> CaseSealPaldValue类,以及