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我使用FileProvider来分享我的应用程序的图像。虽然它非常适合通过 gmail、环聊、驱动器等进行文件共享，但我无法通过非 Google 应用程序共享文件，例如 WhatsApp、Viber。

Androidmanifest中的 FileProvider

 <provider
        android:name="android.support.v4.content.FileProvider"
        android:authorities="<package.name>.fileprovider"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/filepaths" />
    </provider>

文件路径.xml

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

共享文件的方法

/**
 * Static method to export charts data
 *
 * @param mContext object context
 * @param view     chart to be converted into image
 * @throws IOException
 **/
public static void exportChartAsPng(Context mContext, View view) throws IOException {
    File baseDir = mContext.getFilesDir();
    Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
    SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");

    String fileName = "chart-" + df.format(calendar.getTimeInMillis()) + ".png";
    String filePath = baseDir.toString() + File.separator + fileName;
    File chartFile = new File(filePath);

    OutputStream outStream = new FileOutputStream(chartFile);
    getBitmapFromView(view).compress(Bitmap.CompressFormat.PNG, 100, outStream);
    outStream.flush();
    outStream.close();

    try {
        Uri fileUri = FileProvider.getUriForFile(
                mContext,
                "<package.name>.fileprovider",
                chartFile);


        Intent sendIntent = new Intent("<package.name>.ACTION_RETURN_FILE");
        if (fileUri != null) {
            // Grant temporary read permission to the content URI
            sendIntent.addFlags(
                    Intent.FLAG_GRANT_READ_URI_PERMISSION);
        }
        sendIntent.setAction(Intent.ACTION_SEND);
        sendIntent.putExtra(Intent.EXTRA_STREAM, fileUri);
        sendIntent.setType("image/png");
        mContext.startActivity(Intent.createChooser(sendIntent, mContext.getString(R.string.share)));

    } catch (IllegalArgumentException e) {
        Log.e("File Selector",
                "The selected file can't be shared: " +
                        chartFile.getName());
        e.printStackTrace();
    }

}
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