1.在RES目录下建立XML文件:file_paths.xml

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

    <cache-path
        name="cache"
        path="" />

    <external-path
        name="external"
        path="" />

    <external-files-path
        name="external_file_path"
        path="" />
    <external-cache-path
        name="external_cache_path"
        path="" />

</paths>

2.

public class FileProvider7 {

    public static Uri getUriForFile(Context context, File file) {
        Uri fileUri = null;
        if (Build.VERSION.SDK_INT >= 24) {
            fileUri = getUriForFile24(context, file);
        } else {
            fileUri = Uri.fromFile(file);
        }
        return fileUri;
    }



    public static Uri getUriForFile24(Context context, File file) {
        Uri fileUri = android.support.v4.content.FileProvider.getUriForFile(context,
                context.getPackageName() + ".android7.fileprovider",
                file);
        return fileUri;
    }


    public static void setIntentDataAndType(Context context,
                                            Intent intent,
                                            String type,
                                            File file,
                                            boolean writeAble) {
        if (Build.VERSION.SDK_INT >= 24) {
            intent.setDataAndType(getUriForFile(context, file), type);
            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            if (writeAble) {
                intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
            }
        } else {
            intent.setDataAndType(Uri.fromFile(file), type);
        }
    }


    public static void setIntentData(Context context,
                                     Intent intent,
                                     File file,
                                     boolean writeAble) {
        if (Build.VERSION.SDK_INT >= 24) {
            intent.setData(getUriForFile(context, file));
            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            if (writeAble) {
                intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
            }
        } else {
            intent.setData(Uri.fromFile(file));
        }
    }


    public static void grantPermissions(Context context, Intent intent, Uri uri, boolean writeAble) {

        int flag = Intent.FLAG_GRANT_READ_URI_PERMISSION;
        if (writeAble) {
            flag |= Intent.FLAG_GRANT_WRITE_URI_PERMISSION;
        }
        intent.addFlags(flag);
        List<ResolveInfo> resInfoList = context.getPackageManager()
                .queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
        for (ResolveInfo resolveInfo : resInfoList) {
            String packageName = resolveInfo.activityInfo.packageName;
            context.grantUriPermission(packageName, uri, flag);
        }
    }


}

compile 'com.zhy.base:fileprovider:1.0.0'

   <provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="${applicationId}.android7.fileprovider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths" />
        </provider>