Question

我正在尝试使用FileProvider内容提供程序共享内部日志文件。我在清单中有以下<provider>条目：

<provider
    android:name="android.support.v4.content.FileProvider"
    android:authorities="nl.charm.nedradio"
    android:exported="false"
    android:grantUriPermissions="true">
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/file_provider_paths" />
</provider>

file_provider_paths.xml包含：

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <external-files-path name="files" path="." />
</paths>

创建共享意图的代码为：

private static final String LOGFILE_NAME = "log.txt";
private static final String AUTHORITY = "nl.charm.nedradio";

public static Intent getShareIntent(Context context)
{
    Intent intent = new Intent(Intent.ACTION_SEND);
    intent.setType("text/plain");
    intent.putExtra(Intent.EXTRA_SUBJECT, "Log File");
    intent.putExtra(Intent.EXTRA_TEXT, "App logfile.");

    // Allow access outside of share application's realm
    intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
    intent.setFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);

    File logFile = new File(context.getExternalFilesDir(null), LOGFILE_NAME);
    Uri logURI = FileProvider.getUriForFile(context, AUTHORITY, logFile);
    intent.putExtra(Intent.EXTRA_STREAM, logURI);

    return intent;
}

创建意图的工作正常，但是当我尝试与他人共享时Gmail，我在logcat中收到以下错误：

2018-10-18 10:16:49.536 4585-4585/com.google.android.gm E/Gmail: Gmail:Error adding attachment
    exk: FileNotFoundException when openFileDescriptor.

我一直在寻找答案，但找不到答案。那么关于我在做什么错的任何建议？

Answer 1

经过更多搜索后，我发现我使用了错误的位置来保存日志文件。为了解决该问题，我必须对logback.xml配置进行以下更改：

<configuration>

    <property name="LOGFILE_NAME" value="log.txt" />
    <property name="EXT_FILES_DIR" value="${EXT_DIR:-/sdcard}/Android/data/${PACKAGE_NAME}/files" />

    <appender name="rollingfile" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${EXT_FILES_DIR}/${LOGFILE_NAME}</file>

        <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
            <fileNamePattern>${LOGFILE_NAME}.%i</fileNamePattern>
            <minIndex>1</minIndex>
            <maxIndex>1</maxIndex>
        </rollingPolicy>

        <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
            <maxFileSize>400KB</maxFileSize>
        </triggeringPolicy>

        <encoder>
            <pattern>%date %-5level %logger{10} - %msg%n</pattern>
        </encoder>
    </appender>

    <root level="TRACE">
        <appender-ref ref="rollingfile" />
    </root>

</configuration>

相关的更改是属性EXT_FILES_DIR的值。现在，它将使用应用程序可用的外部存储，而不是旧路径/data/data/nl.charm.nedradio/files。

所需的其他更改在file_provider_paths.xml中。此处，外部路径从"."更改为"/"：

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <external-files-path name="files" path="/" />
</paths>

现在共享可与Gmail和Google云端硬盘。

Answer 2

这里是一个类似的问题，另外一个是picture，请问this question，我保证可以解决您的问题。

<files-path name="name" path="path" />  
Represents files in the files/ subdirectory of your app's internal storage area. This subdirectory is the same as the value returned by Context.getFilesDir().

<external-path name="name" path="path" />
Represents files in the root of the external storage area. The root path of this subdirectory is the same as the value returned by Environment.getExternalStorageDirectory().

<external-files-path name="name" path="path" />
Represents files in the root of your app's external storage area. The root path of this subdirectory is the same as the value returned by Context#getExternalFilesDir(String) Context.getExternalFilesDir(null).

与FileProvider共享日志文件失败

2 个答案: