如果可以发送Zip然后尝试这种方式

Question

我正在尝试在gmail应用中附加pdf文件。我已阅读this和this（应用解决方案）我正在尝试;

public static void attachFile(Context ctx) {
    String TAG = "Attach";
    File documentsPath = new File(ctx.getFilesDir(), "documents");
    Log.i(TAG,"documentsAbsolutePath Output");
    Log.i(TAG, documentsPath.getAbsolutePath().toString());
    File file = new File(documentsPath, "sample.pdf");
    if ( file.exists() ) {
        Toast.makeText(ctx, "Exits", Toast.LENGTH_LONG).show();
    }else{
        Toast.makeText(ctx, "Not Exist", Toast.LENGTH_LONG).show();
    }
    Log.i(TAG,"file Output");
    Log.i(TAG, file.toString());
    Log.i(TAG, String.valueOf(file.length()));
    Uri uri = FileProvider.getUriForFile(ctx, "com.example.fyp_awais.attachfiletest2.fileprovider", file);
    Log.i(TAG,"URI Output");
    Log.i(TAG,uri.toString());
    Intent intent = ShareCompat.IntentBuilder.from((Activity) ctx)
            .setType("application/pdf")
            .setStream(uri)
            .setChooserTitle("Choose bar")
            .createChooserIntent()
            .addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
    ctx.startActivity(intent);
}

输出

documentsAbsolutePath Output
/data/data/com.example.fyp_awais.attachfiletest2/files/documents
 file Output
/data/data/com.example.fyp_awais.attachfiletest2/files/documents/sample.pdf
 0
 URI Output
 content://com.example.fyp_awais.attachfiletest2.fileprovider/pdf_folder/sample.pdf

Menifest

<provider
    android:name="android.support.v4.content.FileProvider"
    android:authorities="com.example.fyp_awais.attachfiletest2.fileprovider"
    android:exported="false"
    android:grantUriPermissions="true">
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/filepath" />
</provider>

FilePath.xml

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
    <paths xmlns:android="http://schemas.android.com/apk/res/android">
        <files-path name="pdf_folder" path="documents/"/>
    </paths>
</PreferenceScreen

pdf文件保存在Galaxy Core Prime\Phone\documents中。（文件大小：53.7KB）

但它给出了

无法附加空文件。

我对此行<files-path name="pdf_folder" path="documents/"/>中的文件夹名称感到困惑。该文件位于\Phone\documents。然后为什么文件夹名称？

修改1

尝试用setType(application/pdf)替换setType("message/rfc822")但是没有用。有什么帮助吗？

Answer 1

以URI格式发送文件，如下所示：

Intent emailIntent = new Intent(Intent.ACTION_SEND_MULTIPLE);
        emailIntent.setData(Uri.parse("mailto:"));
        emailIntent.setType("application/image");
        emailIntent.putExtra(Intent.EXTRA_EMAIL, TO);
        emailIntent.putExtra(Intent.EXTRA_CC, CC);
ArrayList<Uri> uris = new ArrayList<>();
        //convert from paths to Android friendly Parcelable Uri's
        uris.add(frontImageUri);
        uris.add(backImageUri);
        emailIntent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
startActivity(Intent.createChooser(emailIntent, "Send mail..."));

Answer 2

如果可以发送Zip然后尝试这种方式

String fileNameStor_zip = Environment.getExternalStorageDirectory（）+＆＃34; /＆＃34; + fileName +＆＃34; .zip＆＃34;;

String [] path = {your 1st pdf File Path，your 2nd pdf File Path};

Compress compress = new Compress（path，fileNameStor_zip）;

compress.zip（）;

URI = Uri.parse（＆＃34; file：//＆＃34; + fileNameStor_zip）;

提供您的Gmail意图

intent.putExtra（Intent.EXTRA_STREAM，URI）;

Answer 3

Uri contentUri = FileProvider.getUriForFile(this, "com.mydomain.fileprovider", newFile);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
i.setData(contentUri);

Answer 4

String filename="my_file.vcf"; 
File filelocation = new File(Environment.getExternalStorageDirectory().getAbsolutePath(), filename);
Uri path = Uri.fromFile(filelocation); 
Intent emailIntent = new Intent(Intent.ACTION_SEND);
// set the type to 'email'
emailIntent .setType("vnd.android.cursor.dir/email");
String to[] = {"asd@gmail.com"};
emailIntent .putExtra(Intent.EXTRA_EMAIL, to);
// the attachment
emailIntent .putExtra(Intent.EXTRA_STREAM, path);
// the mail subject
emailIntent .putExtra(Intent.EXTRA_SUBJECT, "Subject");
startActivity(Intent.createChooser(emailIntent , "Send email..."));

Answer 5

您必须授予访问gmail存储空间的权限。

Answer 6

如果它有帮助 - 这是我在带有几个文件的app调试功能中所做的，它应该没有任何不同。我先将它们复制/导出到用户公共文件夹中，然后再添加它们，并使它们具有全局可读性。

 if (verifyStoragePermissions(c)) {
        final Intent intent = new Intent(Intent.ACTION_SEND_MULTIPLE);
        intent.setType("text/plain");
        intent.putExtra(Intent.EXTRA_EMAIL, new String[]{"recipient@email.address"});
        intent.putExtra(Intent.EXTRA_SUBJECT, "Email Subject");

        //build up message
        ArrayList<Uri> uris = new ArrayList<>();
        StringBuilder content = new StringBuilder();
        content.append(
                String.format(
                        c.getString(R.string.message_log_upload_email_body) +
                                "\n\nmodelDesc:%s \n\nmanuf:%s \n\naId: %s,\n\nhIid: %s,\n\nfbId: %s.",
                        Build.MODEL, Build.MANUFACTURER, getSomeVar1(), getSomeVar2(), getSomeVar3())
        );
        content.append("\n\nMy logged in account id is: ").append(getAccountId(c)).append(".");
        content.append("\n\nHere's an overview of my attachments:\n");

        for (String s : addresses) {
            File f = new File(s);
            //noinspection ResultOfMethodCallIgnored
            f.setReadable(true, false);
            Uri add = Uri.fromFile(f);
            //add attachment manifest
            content.append(String.format(Locale.UK, "|->  %s (%.3f kb)\n", f.getName(), (float) f.length() / 1024));
            uris.add(add);
        }
        //attach the things
        intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
        //set content/message
        intent.putExtra(Intent.EXTRA_TEXT, content.toString());
        c.startActivity(intent);
    }
}

addresses是该函数的String []参数。我通过使用我用来导出文件的函数来构建它，返回他们导出的文件地址字符串数组 - 因为我最初将文件存储在我应用程序的私有存储中

错误：无法使用文件提供程序在GMAIL应用程序中附加空文件

6 个答案:

如果可以发送Zip然后尝试这种方式