发送带附件的电子邮件时出错

我有一个问题，我想要发送带有图像附件的电子邮件，但从弹出式菜单中选择Gmail选项时，它总是返回错误。我没有找到背后的原因。请建议我正确的解决方案。发送带附件的电子邮件时出错

代码：

Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND); 
emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Halosys Greetings"); 
emailIntent.putExtra(android.content.Intent.EXTRA_TEXT,""); 
emailIntent.putExtra(Intent.EXTRA_STREAM, bm); 
emailIntent.setType("image/png"); 
startActivity(Intent.createChooser(emailIntent, "Send mail..."));

错误堆栈：

12-28 11:42:37.456: ERROR/AndroidRuntime(21930): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.google.android.gm/com.google.android.gm.ComposeActivity}: java.lang.NullPointerException 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at android.os.Handler.dispatchMessage(Handler.java:99) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at android.os.Looper.loop(Looper.java:123) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at android.app.ActivityThread.main(ActivityThread.java:4627) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at java.lang.reflect.Method.invokeNative(Native Method) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at java.lang.reflect.Method.invoke(Method.java:521) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at dalvik.system.NativeStart.main(Native Method) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930): Caused by: java.lang.NullPointerException 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at com.google.android.gm.provider.Gmail$AttachmentOrigin.localFileExtras(Gmail.java:2194) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at com.google.android.gm.ComposeArea.addAttachment(ComposeArea.java:732) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at com.google.android.gm.ComposeArea.initFromExtras(ComposeArea.java:685) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at com.google.android.gm.ComposeActivity.initFromExtras(ComposeActivity.java:1482) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at com.google.android.gm.ComposeActivity.finishOnCreateAfterAccountSelected(ComposeActivity.java:1021) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at com.google.android.gm.ComposeActivity.onCreate(ComposeActivity.java:259) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
12-28 11:42:37.456: ERROR/AndroidRuntime(21930):  ... 11 more

在此先感谢。

来源

2011-12-28 Sanat Pandey

需要代码来理解问题。 – 2011-12-28 06:19:53

请参阅我编辑的代码块 – 2011-12-28 06:24:20

这里是什么bm？ – Sujit 2011-12-28 06:29:11

不知道你是如何发送它，但这段代码工作正常。

public void doSendFile() { 
    String fileName = "myFileName.txt"; 

    String externalStorageDirectory = Environment 
     .getExternalStorageDirectory().toString(); 
    String myDir = externalStorageDirectory + "/myDir/"; // the file will be in myDir 
    Uri uri = Uri.parse("file://" + myDir + fileName); 
    Intent i = new Intent(Intent.ACTION_SEND); 
    try { 
     myFileHandle.close(); // you may want to be sure that the file is closed correctly 
    } catch (IOException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 
    i.setType("text/plain"); // as you can see I am sending a simple txt file here 
    i.putExtra(Intent.EXTRA_EMAIL, new String[] { "[email protected]" }); 
    i.putExtra(Intent.EXTRA_SUBJECT, "the subject text"); 
    i.putExtra(Intent.EXTRA_TEXT, "extra text body"); 
    Log.i(getClass().getSimpleName(), "logFile=" + uri); 
    i.putExtra(Intent.EXTRA_STREAM, uri); 

    try { 
     startActivity(Intent.createChooser(i, "Send mail...")); 
    } catch (android.content.ActivityNotFoundException ex) { 
     Toast.makeText(getBaseContext(), 
      "There are no email clients installed.", Toast.LENGTH_SHORT) 
       .show(); 
    } 
}

也确保您有

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

在你的清单，所以你可以实际创建外部存储中的文件。

P.S.我从来没有设法直接从内部存储器发送文件。

来源

2011-12-28 06:28:37 user387184

使用此代码..

Intent i = new Intent(Intent.ACTION_SEND); 
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
i.setType("image/jpg"); 
i.putExtra(Intent.EXTRA_STREAM, Uri.parse("file:///sdcard/Pictures/image.jpg")); // Path to your image in sdcard. 
startActivity(i);

来源

2011-12-28 06:30:11 Sujit

我有同样的问题，我发现我是用错了方式Intent.EXTRA_STREAM。

i.putExtra(Intent.EXTRA_STREAM, Uri.parse("file:///sdcard/Pictures/image.jpg"));

这解决了这个问题：

我使用类似解决它。

来源

2012-12-19 19:25:54 Martin

发送带附件的电子邮件时出错

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