在Android中将字符串作为文件附件进行共享

String text = "要共享的字符串内容";
File file = new File(context.getCacheDir(), "shared_file.txt");
try {
    FileWriter writer = new FileWriter(file);
    writer.write(text);
    writer.flush();
    writer.close();
} catch (IOException e) {
    e.printStackTrace();
}

<manifest>
    <application>
        ...
        <provider
            android:name="androidx.core.content.FileProvider"
            android:authorities="com.example.fileprovider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths" />
        </provider>
        ...
    </application>
</manifest>

<paths>
    <cache-path name="shared_files" path="." />
</paths>

Uri fileUri = FileProvider.getUriForFile(context, "com.example.fileprovider", file);
Intent shareIntent = new Intent(Intent.ACTION_SEND);
shareIntent.setType("text/plain");
shareIntent.putExtra(Intent.EXTRA_STREAM, fileUri);
shareIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
context.startActivity(Intent.createChooser(shareIntent, "分享文件"));