Android Open Source - EasyCast Utils

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License

The source code is released under:
Apache License
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Java Source Code

/*
 * Copyright 2014 Parth Sane/*ww  w .  j  a  v  a2  s  . com*/
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
   limitations under the License.
 */
package com.laer.easycast;

import android.app.AlertDialog;
import android.content.Context;
import android.graphics.Point;
import android.view.Display;
import android.view.WindowManager;
import android.widget.Toast;

import java.io.File;
import java.util.ArrayList;
import java.util.Locale;

public class Utils {
    private Context _context;

    // constructor
    public Utils(Context context) {
        this._context = context;
    }

    // Reading file paths from SDCard
    public ArrayList<String> getFilePaths() {
        ArrayList<String> filePaths = new ArrayList<String>();

        File directory = new File(
                android.os.Environment.getExternalStorageDirectory()
                        + File.separator + AppConstant.PHOTO_ALBUM);

        // check for directory
        if (directory.isDirectory()) {
            // getting list of file paths
            File[] listFiles = directory.listFiles();

            // Check for count
            if (listFiles.length > 0) {

                // loop through all files
                for (int i = 0; i < listFiles.length; i++) {

                    // get file path
                    String filePath = listFiles[i].getAbsolutePath();

                    // check for supported file extension
                    if (IsSupportedFile(filePath)) {
                        // Add image path to array list
                        filePaths.add(filePath);
                    }
                }
            } else {
                // image directory is empty
                Toast.makeText(
                        _context,
                        AppConstant.PHOTO_ALBUM
                                + " is empty. Please load some images in it !",
                        Toast.LENGTH_LONG).show();
            }

        } else {
            AlertDialog.Builder alert = new AlertDialog.Builder(_context);
            alert.setTitle("Error!");
            alert.setMessage(AppConstant.PHOTO_ALBUM
                    + " directory path is not valid! Please set the image directory name AppConstant.java class");
            alert.setPositiveButton("OK", null);
            alert.show();
        }

        return filePaths;
    }

    // Check supported file extensions
    private boolean IsSupportedFile(String filePath) {
        String ext = filePath.substring((filePath.lastIndexOf(".") + 1),
                filePath.length());

        if (AppConstant.FILE_EXTN
                .contains(ext.toLowerCase(Locale.getDefault())))
            return true;
        else
            return false;

    }

    /*
     * getting screen width
     */
    @SuppressWarnings("deprecation")
    public int getScreenWidth() {
        int columnWidth;
        WindowManager wm = (WindowManager) _context
                .getSystemService(Context.WINDOW_SERVICE);
        Display display = wm.getDefaultDisplay();

        final Point point = new Point();
        try {
            display.getSize(point);
        } catch (java.lang.NoSuchMethodError ignore) {
            // Older device
            point.x = display.getWidth();
            point.y = display.getHeight();
        }
        columnWidth = point.x;
        return columnWidth;
    }
}
Java Source Code List
