Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;

import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.DocumentsContract;
import android.provider.MediaStore;

public class Main {
    /**
     * Content Uri scheme for Downloads Provider.
     */
    public static final String DOWNLOADS_PROVIDER_PATH = "content://downloads/public_downloads";

    /** 
     * Get a GhostMySelfie file path from a Uri. This will get the the path
     * for Storage Access Framework Documents, as well as the _data
     * field for the MediaStore and other file-based ContentProviders.
     * 
     * @param context The context. 
     * @param uri The Uri to query. 
     * 
     * return selfieFilePath
     */
    public static String getPath(final Context context, final Uri uri) {
        // Check if the version of current device is greater 
        // than API 19 (KitKat).
        final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;

        // DocumentProvider.
        if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
            // ExternalStorageProvider 
            if (isExternalStorageDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];

                if ("primary".equalsIgnoreCase(type)) {
                    return Environment.getExternalStorageDirectory() + "/" + split[1];
                }
            }
            // DownloadsProvider 
            else if (isDownloadsDocument(uri)) {
                final String id = DocumentsContract.getDocumentId(uri);
                final Uri contentUri = ContentUris.withAppendedId(Uri.parse(DOWNLOADS_PROVIDER_PATH),
                        Long.valueOf(id));

                return getGhostMySelfieDataColumn(context, contentUri, null, null);
            }
            // MediaProvider 
            else if (isMediaDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");

                final Uri contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;

                final String selection = "_id = ?";
                final String[] selectionArgs = new String[] { split[1] };

                // Get the FilePath from GhostMySelfie MediStore
                // for given Uri, selection, selectionArgs.
                return getGhostMySelfieDataColumn(context, contentUri, selection, selectionArgs);
            }
        }
        // MediaStore (and general) .
        else if ("content".equalsIgnoreCase(uri.getScheme()))
            return getGhostMySelfieDataColumn(context, uri, null, null);
        // File 
        else if ("file".equalsIgnoreCase(uri.getScheme()))
            return uri.getPath();

        return null;
    }

    /** 
     * @param uri The Uri to check. 
     * @return Whether the Uri authority is ExternalStorageProvider. 
     */
    private static boolean isExternalStorageDocument(Uri uri) {
        return "com.android.externalstorage.documents".equals(uri.getAuthority());
    }

    /** 
     * @param uri The Uri to check. 
     * @return Whether the Uri authority is DownloadsProvider. 
     */
    private static boolean isDownloadsDocument(Uri uri) {
        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
    }

    /** 
     * Get the value of the data column for this Uri. This is useful
     * for MediaStore Uris, and other file-based ContentProviders.
     * 
     * @param context The context. 
     * @param uri The Uri to query. 
     * @param selection (Optional) Filter used in the query. 
     * @param selectionArgs (Optional) Selection arguments used in the query. 
     * @return The value of the _data column, which is typically a file path.
     */
    private static String getGhostMySelfieDataColumn(Context context, Uri uri, String selection,
            String[] selectionArgs) {
        // Projection used to query Android GhostMySelfie Content Provider.
        final String[] projection = { MediaStore.Images.Media.DATA };

        //Query and get a cursor to Android GhostMySelfie
        // Content Provider.
        try (Cursor cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null)) {
            // If selfie is present, get the file path of the selfie.
            if (cursor != null && cursor.moveToFirst())
                return cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA));
        }

        // No selfie present. returns null.
        return null;
    }

    /** 
     * @param uri The Uri to check. 
     * @return Whether the Uri authority is MediaProvider. 
     */
    private static boolean isMediaDocument(Uri uri) {
        return "com.android.providers.media.documents".equals(uri.getAuthority());
    }
}