src/com/android/gallery3d/util/GalleryUtils.java - LeafOS-Project/android_packages_apps_Gallery2 - Gitiles

 /*
  * Copyright (C) 2010 The Android Open Source Project
  *
  * 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.android.gallery3d.util;

 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.content.ActivityNotFoundException;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.SharedPreferences.Editor;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.content.res.Resources;
 import android.graphics.Color;
 import android.net.Uri;
 import android.os.ConditionVariable;
 import android.os.Environment;
 import android.os.StatFs;
 import android.preference.PreferenceManager;
 import android.provider.MediaStore;
 import android.telephony.TelephonyManager;
 import android.util.DisplayMetrics;
 import android.util.Log;
 import android.view.WindowManager;
 import android.widget.Toast;

 import org.codeaurora.gallery.R;
 import com.android.gallery3d.app.GalleryActivity;
 import com.android.gallery3d.app.PackagesMonitor;
 import com.android.gallery3d.common.ApiHelper;
 import com.android.gallery3d.data.DataManager;
 import com.android.gallery3d.data.MediaItem;
 import com.android.gallery3d.ui.TiledScreenNail;
 import com.android.gallery3d.util.ThreadPool.CancelListener;
 import com.android.gallery3d.util.ThreadPool.JobContext;

 import java.io.File;
 import java.util.Arrays;
 import java.util.List;
 import java.util.Locale;

 public class GalleryUtils {
     private static final String TAG = "GalleryUtils";
     private static final String MAPS_PACKAGE_NAME = "com.google.android.apps.maps";
     private static final String MAPS_CLASS_NAME = "com.google.android.maps.MapsActivity";
     private static final String CAMERA_LAUNCHER_NAME = "com.android.camera.CameraLauncher";

     public static final String MIME_TYPE_IMAGE = "image/*";
     public static final String MIME_TYPE_VIDEO = "video/*";
     public static final String MIME_TYPE_PANORAMA360 = "application/vnd.google.panorama360+jpg";
     public static final String MIME_TYPE_ALL = "*/*";

     private static final String DIR_TYPE_IMAGE = "vnd.android.cursor.dir/image";
     private static final String DIR_TYPE_VIDEO = "vnd.android.cursor.dir/video";

     private static final String PREFIX_PHOTO_EDITOR_UPDATE = "editor-update-";
     private static final String PREFIX_HAS_PHOTO_EDITOR = "has-editor-";

     private static final String KEY_CAMERA_UPDATE = "camera-update";
     private static final String KEY_HAS_CAMERA = "has-camera";

     private static float sPixelDensity = -1f;
     private static boolean sCameraAvailableInitialized = false;
     private static boolean sCameraAvailable;

     public static void initialize(Context context) {
         DisplayMetrics metrics = new DisplayMetrics();
         WindowManager wm = (WindowManager)
                 context.getSystemService(Context.WINDOW_SERVICE);
         wm.getDefaultDisplay().getMetrics(metrics);
         sPixelDensity = metrics.density;
         Resources r = context.getResources();
         TiledScreenNail.setPlaceholderColor(r.getColor(
                 R.color.bitmap_screennail_placeholder));
         initializeThumbnailSizes(metrics, r);
     }

     private static void initializeThumbnailSizes(DisplayMetrics metrics, Resources r) {
         int maxPixels = Math.max(metrics.heightPixels, metrics.widthPixels);

         // For screen-nails, we never need to completely fill the screen
         MediaItem.setThumbnailSizes(maxPixels / 2, maxPixels / 5);
         TiledScreenNail.setMaxSide(maxPixels / 2);
     }

     public static float[] intColorToFloatARGBArray(int from) {
         return new float[] {
             Color.alpha(from) / 255f,
             Color.red(from) / 255f,
             Color.green(from) / 255f,
             Color.blue(from) / 255f
         };
     }

     public static float dpToPixel(float dp) {
         return sPixelDensity * dp;
     }

     public static int dpToPixel(int dp) {
         return Math.round(dpToPixel((float) dp));
     }

     public static int meterToPixel(float meter) {
         // 1 meter = 39.37 inches, 1 inch = 160 dp.
         return Math.round(dpToPixel(meter * 39.37f * 160));
     }

     public static byte[] getBytes(String in) {
         byte[] result = new byte[in.length() * 2];
         int output = 0;
         for (char ch : in.toCharArray()) {
             result[output++] = (byte) (ch & 0xFF);
             result[output++] = (byte) (ch >> 8);
         }
         return result;
     }

     // Below are used the detect using database in the render thread. It only
     // works most of the time, but that's ok because it's for debugging only.

     private static volatile Thread sCurrentThread;
     private static volatile boolean sWarned;

     public static void setRenderThread() {
         sCurrentThread = Thread.currentThread();
     }

     public static void assertNotInRenderThread() {
         if (!sWarned) {
             if (Thread.currentThread() == sCurrentThread) {
                 sWarned = true;
                 Log.w(TAG, new Throwable("Should not do this in render thread"));
             }
         }
     }

     private static final double RAD_PER_DEG = Math.PI / 180.0;
     private static final double EARTH_RADIUS_METERS = 6367000.0;

     public static double fastDistanceMeters(double latRad1, double lngRad1,
             double latRad2, double lngRad2) {
        if ((Math.abs(latRad1 - latRad2) > RAD_PER_DEG)
              || (Math.abs(lngRad1 - lngRad2) > RAD_PER_DEG)) {
            return accurateDistanceMeters(latRad1, lngRad1, latRad2, lngRad2);
        }
        // Approximate sin(x) = x.
        double sineLat = (latRad1 - latRad2);

        // Approximate sin(x) = x.
        double sineLng = (lngRad1 - lngRad2);

        // Approximate cos(lat1) * cos(lat2) using
        // cos((lat1 + lat2)/2) ^ 2
        double cosTerms = Math.cos((latRad1 + latRad2) / 2.0);
        cosTerms = cosTerms * cosTerms;
        double trigTerm = sineLat * sineLat + cosTerms * sineLng * sineLng;
        trigTerm = Math.sqrt(trigTerm);

        // Approximate arcsin(x) = x
        return EARTH_RADIUS_METERS * trigTerm;
     }

     public static double accurateDistanceMeters(double lat1, double lng1,
             double lat2, double lng2) {
         double dlat = Math.sin(0.5 * (lat2 - lat1));
         double dlng = Math.sin(0.5 * (lng2 - lng1));
         double x = dlat * dlat + dlng * dlng * Math.cos(lat1) * Math.cos(lat2);
         return (2 * Math.atan2(Math.sqrt(x), Math.sqrt(Math.max(0.0,
                 1.0 - x)))) * EARTH_RADIUS_METERS;
     }


     public static final double toMile(double meter) {
         return meter / 1609;
     }

     // For debugging, it will block the caller for timeout millis.
     public static void fakeBusy(JobContext jc, int timeout) {
         final ConditionVariable cv = new ConditionVariable();
         jc.setCancelListener(new CancelListener() {
             @Override
             public void onCancel() {
                 cv.open();
             }
         });
         cv.block(timeout);
         jc.setCancelListener(null);
     }

     public static boolean isEditorAvailable(Context context, String mimeType) {
         int version = PackagesMonitor.getPackagesVersion(context);

         String updateKey = PREFIX_PHOTO_EDITOR_UPDATE + mimeType;
         String hasKey = PREFIX_HAS_PHOTO_EDITOR + mimeType;

         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
         if (prefs.getInt(updateKey, 0) != version) {
             PackageManager packageManager = context.getPackageManager();
             List<ResolveInfo> infos = packageManager.queryIntentActivities(
                     new Intent(Intent.ACTION_EDIT).setType(mimeType), 0);
             prefs.edit().putInt(updateKey, version)
                         .putBoolean(hasKey, !infos.isEmpty())
                         .commit();
         }

         return prefs.getBoolean(hasKey, true);
     }

     public static boolean isAnyCameraAvailable(Context context) {
         int version = PackagesMonitor.getPackagesVersion(context);
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
         if (prefs.getInt(KEY_CAMERA_UPDATE, 0) != version) {
             PackageManager packageManager = context.getPackageManager();
             List<ResolveInfo> infos = packageManager.queryIntentActivities(
                     new Intent(MediaStore.INTENT_ACTION_STILL_IMAGE_CAMERA), 0);
             prefs.edit().putInt(KEY_CAMERA_UPDATE, version)
                         .putBoolean(KEY_HAS_CAMERA, !infos.isEmpty())
                         .commit();
         }
         return prefs.getBoolean(KEY_HAS_CAMERA, true);
     }

     public static boolean isCameraAvailable(Context context) {
         if (sCameraAvailableInitialized) return sCameraAvailable;
         PackageManager pm = context.getPackageManager();
         Intent cameraIntent = IntentHelper.getCameraIntent();
         List<ResolveInfo> apps = pm.queryIntentActivities(cameraIntent, 0);
         sCameraAvailableInitialized = true;
         sCameraAvailable = !apps.isEmpty();
         return sCameraAvailable;
     }

     public static void startCameraActivity(Context context) {
         Intent intent = new Intent(MediaStore.INTENT_ACTION_STILL_IMAGE_CAMERA)
                 .setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
                         | Intent.FLAG_ACTIVITY_NEW_TASK);
         try {
             context.startActivity(intent);
         } catch (ActivityNotFoundException e) {
             // This will only occur if Camera was disabled while Gallery is open
             // since we cache our availability check. Just abort the attempt.
             Log.e(TAG, "Camera activity previously detected but cannot be found", e);
         }
     }

     public static void startGalleryActivity(Context context) {
         Intent intent = new Intent(context, GalleryActivity.class)
                 .setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
                 | Intent.FLAG_ACTIVITY_NEW_TASK);
         context.startActivity(intent);
     }

     public static boolean isValidLocation(double latitude, double longitude) {
         // TODO: change || to && after we fix the default location issue
         return (latitude != MediaItem.INVALID_LATLNG || longitude != MediaItem.INVALID_LATLNG);
     }

     public static String formatLatitudeLongitude(String format, double latitude,
             double longitude) {
         // We need to specify the locale otherwise it may go wrong in some language
         // (e.g. Locale.FRENCH)
         return String.format(Locale.ENGLISH, format, latitude, longitude);
     }

     public static void showOnMap(final Context context, double latitude, double longitude) {
         try {
             // We don't use "geo:latitude,longitude" because it only centers
             // the MapView to the specified location, but we need a marker
             // for further operations (routing to/from).
             // The q=(lat, lng) syntax is suggested by geo-team.
             String uri = formatLatitudeLongitude("http://maps.google.com/maps?f=q&q=(%f,%f)",
                     latitude, longitude);
             ComponentName compName = new ComponentName(MAPS_PACKAGE_NAME,
                     MAPS_CLASS_NAME);
             Intent mapsIntent = new Intent(Intent.ACTION_VIEW,
                     Uri.parse(uri)).setComponent(compName);
             context.startActivity(mapsIntent);
         } catch (ActivityNotFoundException e) {
             // Use the "geo intent" if no GMM is installed
             Log.e(TAG, "GMM activity not found!", e);
             String url = formatLatitudeLongitude("geo:%f,%f", latitude, longitude);
             try {
                 Intent mapsIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
                 context.startActivity(mapsIntent);
             } catch (ActivityNotFoundException ex) {
                 Log.e(TAG, "Map view activity not found! url = " + url, ex);
                 ((Activity)context).runOnUiThread(new Runnable() {
                     @Override
                     public void run() {
                         Toast.makeText(context,
                                 context.getString(R.string.map_activity_not_found_err),
                                 Toast.LENGTH_SHORT).show();
                     }
                 });

             }
         }
     }

     public static void setViewPointMatrix(
             float matrix[], float x, float y, float z) {
         // The matrix is
         // -z,  0,  x,  0
         //  0, -z,  y,  0
         //  0,  0,  1,  0
         //  0,  0,  1, -z
         Arrays.fill(matrix, 0, 16, 0);
         matrix[0] = matrix[5] = matrix[15] = -z;
         matrix[8] = x;
         matrix[9] = y;
         matrix[10] = matrix[11] = 1;
     }

     public static int getBucketId(String path) {
         return path.toLowerCase().hashCode();
     }

     // Return the local path that matches the given bucketId. If no match is
     // found, return null
     public static String searchDirForPath(File dir, int bucketId) {
         File[] files = dir.listFiles();
         if (files != null) {
             for (File file : files) {
                 if (file.isDirectory()) {
                     String path = file.getAbsolutePath();
                     if (GalleryUtils.getBucketId(path) == bucketId) {
                         return path;
                     } else {
                         path = searchDirForPath(file, bucketId);
                         if (path != null) return path;
                     }
                 }
             }
         }
         return null;
     }

     // Returns a (localized) string for the given duration (in seconds).
     public static String formatDuration(final Context context, int duration) {
         int h = duration / 3600;
         int m = (duration - h * 3600) / 60;
         int s = duration - (h * 3600 + m * 60);
         String durationValue;
         if (h == 0) {
             durationValue = String.format(context.getString(R.string.details_ms), m, s);
         } else {
             durationValue = String.format(context.getString(R.string.details_hms), h, m, s);
         }
         return durationValue;
     }

     @TargetApi(ApiHelper.VERSION_CODES.HONEYCOMB)
     public static int determineTypeBits(Context context, Intent intent) {
         int typeBits = 0;
         String type = intent.resolveType(context);

         if (MIME_TYPE_ALL.equals(type) ||
                 MIME_TYPE_IMAGE.equals(type)) {
             typeBits = DataManager.INCLUDE_ALL;
         } else if (DIR_TYPE_IMAGE.equals(type)) {
             typeBits = DataManager.INCLUDE_IMAGE;
         } else if (MIME_TYPE_VIDEO.equals(type) ||
                 DIR_TYPE_VIDEO.equals(type)) {
             typeBits = DataManager.INCLUDE_VIDEO;
         } else {
             typeBits = DataManager.INCLUDE_ALL;
         }

         if (ApiHelper.HAS_INTENT_EXTRA_LOCAL_ONLY) {
             if (intent.getBooleanExtra(Intent.EXTRA_LOCAL_ONLY, false)) {
                 typeBits |= DataManager.INCLUDE_LOCAL_ONLY;
             }
         }

         return typeBits;
     }

     public static int getSelectionModePrompt(int typeBits) {
         if ((typeBits & DataManager.INCLUDE_VIDEO) != 0) {
             return (typeBits & DataManager.INCLUDE_IMAGE) == 0
                     ? R.string.select_video
                     : R.string.select_item;
         }
         return R.string.select_image;
     }

     public static boolean hasSpaceForSize(long size) {
         String state = Environment.getExternalStorageState();
         if (!Environment.MEDIA_MOUNTED.equals(state)) {
             return false;
         }

         String path = Environment.getExternalStorageDirectory().getPath();
         try {
             StatFs stat = new StatFs(path);
             return stat.getAvailableBlocks() * (long) stat.getBlockSize() > size;
         } catch (Exception e) {
             Log.i(TAG, "Fail to access external storage", e);
         }
         return false;
     }

     public static boolean isPanorama(MediaItem item) {
         if (item == null) return false;
         int w = item.getWidth();
         int h = item.getHeight();
         return (h > 0 && w / h >= 2);
     }
  // Newly added methods
     public static int getIntPref(Context context, String name, int def) {
         SharedPreferences prefs =
             context.getSharedPreferences(context.getPackageName(), Context.MODE_PRIVATE);
         return prefs.getInt(name, def);
     }

     public static void setIntPref(Context context, String name, int value) {
         SharedPreferences prefs =
             context.getSharedPreferences(context.getPackageName(), Context.MODE_PRIVATE);
         Editor ed = prefs.edit();
         ed.putInt(name, value);
         ed.commit();
     }

     public static boolean getBooleanPref(Context context, String name, boolean def) {
         SharedPreferences prefs =
                 context.getSharedPreferences(context.getPackageName(), Context.MODE_PRIVATE);
         return prefs.getBoolean(name, def);
     }

     public static void setBooleanPref(Context context, String name, boolean value) {
         SharedPreferences prefs =
                 context.getSharedPreferences(context.getPackageName(), Context.MODE_PRIVATE);
         Editor ed = prefs.edit();
         ed.putBoolean(name, value);
         ed.commit();
     }

     public static String getStringPref(Context context, String name, String def) {
         SharedPreferences prefs =
                 context.getSharedPreferences(context.getPackageName(), Context.MODE_PRIVATE);
         return prefs.getString(name, def);
     }

     public static void setStringPref(Context context, String name, String value) {
         SharedPreferences prefs =
                 context.getSharedPreferences(context.getPackageName(), Context.MODE_PRIVATE);
         Editor ed = prefs.edit();
         ed.putString(name, value);
         ed.commit();
     }

     public static boolean isTelephonyCallInProgress(Context context) {
         TelephonyManager telephonyManager =
                 (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
         return telephonyManager.getCallState() != TelephonyManager.CALL_STATE_IDLE;
     }
 }
	/*
	* Copyright (C) 2010 The Android Open Source Project
	*
	* 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.android.gallery3d.util;

	import android.annotation.TargetApi;
	import android.app.Activity;
	import android.content.ActivityNotFoundException;
	import android.content.ComponentName;
	import android.content.Context;
	import android.content.Intent;
	import android.content.SharedPreferences;
	import android.content.SharedPreferences.Editor;
	import android.content.pm.PackageManager;
	import android.content.pm.ResolveInfo;
	import android.content.res.Resources;
	import android.graphics.Color;
	import android.net.Uri;
	import android.os.ConditionVariable;
	import android.os.Environment;
	import android.os.StatFs;
	import android.preference.PreferenceManager;
	import android.provider.MediaStore;
	import android.telephony.TelephonyManager;
	import android.util.DisplayMetrics;
	import android.util.Log;
	import android.view.WindowManager;
	import android.widget.Toast;

	import org.codeaurora.gallery.R;
	import com.android.gallery3d.app.GalleryActivity;
	import com.android.gallery3d.app.PackagesMonitor;
	import com.android.gallery3d.common.ApiHelper;
	import com.android.gallery3d.data.DataManager;
	import com.android.gallery3d.data.MediaItem;
	import com.android.gallery3d.ui.TiledScreenNail;
	import com.android.gallery3d.util.ThreadPool.CancelListener;
	import com.android.gallery3d.util.ThreadPool.JobContext;

	import java.io.File;
	import java.util.Arrays;
	import java.util.List;
	import java.util.Locale;

	public class GalleryUtils {
	private static final String TAG = "GalleryUtils";
	private static final String MAPS_PACKAGE_NAME = "com.google.android.apps.maps";
	private static final String MAPS_CLASS_NAME = "com.google.android.maps.MapsActivity";
	private static final String CAMERA_LAUNCHER_NAME = "com.android.camera.CameraLauncher";

	public static final String MIME_TYPE_IMAGE = "image/*";
	public static final String MIME_TYPE_VIDEO = "video/*";
	public static final String MIME_TYPE_PANORAMA360 = "application/vnd.google.panorama360+jpg";
	public static final String MIME_TYPE_ALL = "/";

	private static final String DIR_TYPE_IMAGE = "vnd.android.cursor.dir/image";
	private static final String DIR_TYPE_VIDEO = "vnd.android.cursor.dir/video";

	private static final String PREFIX_PHOTO_EDITOR_UPDATE = "editor-update-";
	private static final String PREFIX_HAS_PHOTO_EDITOR = "has-editor-";

	private static final String KEY_CAMERA_UPDATE = "camera-update";
	private static final String KEY_HAS_CAMERA = "has-camera";

	private static float sPixelDensity = -1f;
	private static boolean sCameraAvailableInitialized = false;
	private static boolean sCameraAvailable;

	public static void initialize(Context context) {
	DisplayMetrics metrics = new DisplayMetrics();
	WindowManager wm = (WindowManager)
	context.getSystemService(Context.WINDOW_SERVICE);
	wm.getDefaultDisplay().getMetrics(metrics);
	sPixelDensity = metrics.density;
	Resources r = context.getResources();
	TiledScreenNail.setPlaceholderColor(r.getColor(
	R.color.bitmap_screennail_placeholder));
	initializeThumbnailSizes(metrics, r);
	}

	private static void initializeThumbnailSizes(DisplayMetrics metrics, Resources r) {
	int maxPixels = Math.max(metrics.heightPixels, metrics.widthPixels);

	// For screen-nails, we never need to completely fill the screen
	MediaItem.setThumbnailSizes(maxPixels / 2, maxPixels / 5);
	TiledScreenNail.setMaxSide(maxPixels / 2);
	}

	public static float[] intColorToFloatARGBArray(int from) {
	return new float[] {
	Color.alpha(from) / 255f,
	Color.red(from) / 255f,
	Color.green(from) / 255f,
	Color.blue(from) / 255f
	};
	}

	public static float dpToPixel(float dp) {
	return sPixelDensity * dp;
	}

	public static int dpToPixel(int dp) {
	return Math.round(dpToPixel((float) dp));
	}

	public static int meterToPixel(float meter) {
	// 1 meter = 39.37 inches, 1 inch = 160 dp.
	return Math.round(dpToPixel(meter * 39.37f * 160));
	}

	public static byte[] getBytes(String in) {
	byte[] result = new byte[in.length() * 2];
	int output = 0;
	for (char ch : in.toCharArray()) {
	result[output++] = (byte) (ch & 0xFF);
	result[output++] = (byte) (ch >> 8);
	}
	return result;
	}

	// Below are used the detect using database in the render thread. It only
	// works most of the time, but that's ok because it's for debugging only.

	private static volatile Thread sCurrentThread;
	private static volatile boolean sWarned;

	public static void setRenderThread() {
	sCurrentThread = Thread.currentThread();
	}

	public static void assertNotInRenderThread() {
	if (!sWarned) {
	if (Thread.currentThread() == sCurrentThread) {
	sWarned = true;
	Log.w(TAG, new Throwable("Should not do this in render thread"));
	}
	}
	}

	private static final double RAD_PER_DEG = Math.PI / 180.0;
	private static final double EARTH_RADIUS_METERS = 6367000.0;

	public static double fastDistanceMeters(double latRad1, double lngRad1,
	double latRad2, double lngRad2) {
	if ((Math.abs(latRad1 - latRad2) > RAD_PER_DEG)
	\|\| (Math.abs(lngRad1 - lngRad2) > RAD_PER_DEG)) {
	return accurateDistanceMeters(latRad1, lngRad1, latRad2, lngRad2);
	}
	// Approximate sin(x) = x.
	double sineLat = (latRad1 - latRad2);

	// Approximate sin(x) = x.
	double sineLng = (lngRad1 - lngRad2);

	// Approximate cos(lat1) * cos(lat2) using
	// cos((lat1 + lat2)/2) ^ 2
	double cosTerms = Math.cos((latRad1 + latRad2) / 2.0);
	cosTerms = cosTerms * cosTerms;
	double trigTerm = sineLat * sineLat + cosTerms * sineLng * sineLng;
	trigTerm = Math.sqrt(trigTerm);

	// Approximate arcsin(x) = x
	return EARTH_RADIUS_METERS * trigTerm;
	}

	public static double accurateDistanceMeters(double lat1, double lng1,
	double lat2, double lng2) {
	double dlat = Math.sin(0.5 * (lat2 - lat1));
	double dlng = Math.sin(0.5 * (lng2 - lng1));
	double x = dlat * dlat + dlng * dlng * Math.cos(lat1) * Math.cos(lat2);
	return (2 * Math.atan2(Math.sqrt(x), Math.sqrt(Math.max(0.0,
	1.0 - x)))) * EARTH_RADIUS_METERS;
	}


	public static final double toMile(double meter) {
	return meter / 1609;
	}

	// For debugging, it will block the caller for timeout millis.
	public static void fakeBusy(JobContext jc, int timeout) {
	final ConditionVariable cv = new ConditionVariable();
	jc.setCancelListener(new CancelListener() {
	@Override
	public void onCancel() {
	cv.open();
	}
	});
	cv.block(timeout);
	jc.setCancelListener(null);
	}

	public static boolean isEditorAvailable(Context context, String mimeType) {
	int version = PackagesMonitor.getPackagesVersion(context);

	String updateKey = PREFIX_PHOTO_EDITOR_UPDATE + mimeType;
	String hasKey = PREFIX_HAS_PHOTO_EDITOR + mimeType;

	SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
	if (prefs.getInt(updateKey, 0) != version) {
	PackageManager packageManager = context.getPackageManager();
	List<ResolveInfo> infos = packageManager.queryIntentActivities(
	new Intent(Intent.ACTION_EDIT).setType(mimeType), 0);
	prefs.edit().putInt(updateKey, version)
	.putBoolean(hasKey, !infos.isEmpty())
	.commit();
	}

	return prefs.getBoolean(hasKey, true);
	}

	public static boolean isAnyCameraAvailable(Context context) {
	int version = PackagesMonitor.getPackagesVersion(context);
	SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
	if (prefs.getInt(KEY_CAMERA_UPDATE, 0) != version) {
	PackageManager packageManager = context.getPackageManager();
	List<ResolveInfo> infos = packageManager.queryIntentActivities(
	new Intent(MediaStore.INTENT_ACTION_STILL_IMAGE_CAMERA), 0);
	prefs.edit().putInt(KEY_CAMERA_UPDATE, version)
	.putBoolean(KEY_HAS_CAMERA, !infos.isEmpty())
	.commit();
	}
	return prefs.getBoolean(KEY_HAS_CAMERA, true);
	}

	public static boolean isCameraAvailable(Context context) {
	if (sCameraAvailableInitialized) return sCameraAvailable;
	PackageManager pm = context.getPackageManager();
	Intent cameraIntent = IntentHelper.getCameraIntent();
	List<ResolveInfo> apps = pm.queryIntentActivities(cameraIntent, 0);
	sCameraAvailableInitialized = true;
	sCameraAvailable = !apps.isEmpty();
	return sCameraAvailable;
	}

	public static void startCameraActivity(Context context) {
	Intent intent = new Intent(MediaStore.INTENT_ACTION_STILL_IMAGE_CAMERA)
	.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
	\| Intent.FLAG_ACTIVITY_NEW_TASK);
	try {
	context.startActivity(intent);
	} catch (ActivityNotFoundException e) {
	// This will only occur if Camera was disabled while Gallery is open
	// since we cache our availability check. Just abort the attempt.
	Log.e(TAG, "Camera activity previously detected but cannot be found", e);
	}
	}

	public static void startGalleryActivity(Context context) {
	Intent intent = new Intent(context, GalleryActivity.class)
	.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
	\| Intent.FLAG_ACTIVITY_NEW_TASK);
	context.startActivity(intent);
	}

	public static boolean isValidLocation(double latitude, double longitude) {
	// TODO: change \|\| to && after we fix the default location issue
	return (latitude != MediaItem.INVALID_LATLNG \|\| longitude != MediaItem.INVALID_LATLNG);
	}

	public static String formatLatitudeLongitude(String format, double latitude,
	double longitude) {
	// We need to specify the locale otherwise it may go wrong in some language
	// (e.g. Locale.FRENCH)
	return String.format(Locale.ENGLISH, format, latitude, longitude);
	}

	public static void showOnMap(final Context context, double latitude, double longitude) {
	try {
	// We don't use "geo:latitude,longitude" because it only centers
	// the MapView to the specified location, but we need a marker
	// for further operations (routing to/from).
	// The q=(lat, lng) syntax is suggested by geo-team.
	String uri = formatLatitudeLongitude("http://maps.google.com/maps?f=q&q=(%f,%f)",
	latitude, longitude);
	ComponentName compName = new ComponentName(MAPS_PACKAGE_NAME,
	MAPS_CLASS_NAME);
	Intent mapsIntent = new Intent(Intent.ACTION_VIEW,
	Uri.parse(uri)).setComponent(compName);
	context.startActivity(mapsIntent);
	} catch (ActivityNotFoundException e) {
	// Use the "geo intent" if no GMM is installed
	Log.e(TAG, "GMM activity not found!", e);
	String url = formatLatitudeLongitude("geo:%f,%f", latitude, longitude);
	try {
	Intent mapsIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
	context.startActivity(mapsIntent);
	} catch (ActivityNotFoundException ex) {
	Log.e(TAG, "Map view activity not found! url = " + url, ex);
	((Activity)context).runOnUiThread(new Runnable() {
	@Override
	public void run() {
	Toast.makeText(context,
	context.getString(R.string.map_activity_not_found_err),
	Toast.LENGTH_SHORT).show();
	}
	});

	}
	}
	}

	public static void setViewPointMatrix(
	float matrix[], float x, float y, float z) {
	// The matrix is
	// -z, 0, x, 0
	// 0, -z, y, 0
	// 0, 0, 1, 0
	// 0, 0, 1, -z
	Arrays.fill(matrix, 0, 16, 0);
	matrix[0] = matrix[5] = matrix[15] = -z;
	matrix[8] = x;
	matrix[9] = y;
	matrix[10] = matrix[11] = 1;
	}

	public static int getBucketId(String path) {
	return path.toLowerCase().hashCode();
	}

	// Return the local path that matches the given bucketId. If no match is
	// found, return null
	public static String searchDirForPath(File dir, int bucketId) {
	File[] files = dir.listFiles();
	if (files != null) {
	for (File file : files) {
	if (file.isDirectory()) {
	String path = file.getAbsolutePath();
	if (GalleryUtils.getBucketId(path) == bucketId) {
	return path;
	} else {
	path = searchDirForPath(file, bucketId);
	if (path != null) return path;
	}
	}
	}
	}
	return null;
	}

	// Returns a (localized) string for the given duration (in seconds).
	public static String formatDuration(final Context context, int duration) {
	int h = duration / 3600;
	int m = (duration - h * 3600) / 60;
	int s = duration - (h * 3600 + m * 60);
	String durationValue;
	if (h == 0) {
	durationValue = String.format(context.getString(R.string.details_ms), m, s);
	} else {
	durationValue = String.format(context.getString(R.string.details_hms), h, m, s);
	}
	return durationValue;
	}

	@TargetApi(ApiHelper.VERSION_CODES.HONEYCOMB)
	public static int determineTypeBits(Context context, Intent intent) {
	int typeBits = 0;
	String type = intent.resolveType(context);

	if (MIME_TYPE_ALL.equals(type) \|\|
	MIME_TYPE_IMAGE.equals(type)) {
	typeBits = DataManager.INCLUDE_ALL;
	} else if (DIR_TYPE_IMAGE.equals(type)) {
	typeBits = DataManager.INCLUDE_IMAGE;
	} else if (MIME_TYPE_VIDEO.equals(type) \|\|
	DIR_TYPE_VIDEO.equals(type)) {
	typeBits = DataManager.INCLUDE_VIDEO;
	} else {
	typeBits = DataManager.INCLUDE_ALL;
	}

	if (ApiHelper.HAS_INTENT_EXTRA_LOCAL_ONLY) {
	if (intent.getBooleanExtra(Intent.EXTRA_LOCAL_ONLY, false)) {
	typeBits \|= DataManager.INCLUDE_LOCAL_ONLY;
	}
	}

	return typeBits;
	}

	public static int getSelectionModePrompt(int typeBits) {
	if ((typeBits & DataManager.INCLUDE_VIDEO) != 0) {
	return (typeBits & DataManager.INCLUDE_IMAGE) == 0
	? R.string.select_video
	: R.string.select_item;
	}
	return R.string.select_image;
	}

	public static boolean hasSpaceForSize(long size) {
	String state = Environment.getExternalStorageState();
	if (!Environment.MEDIA_MOUNTED.equals(state)) {
	return false;
	}

	String path = Environment.getExternalStorageDirectory().getPath();
	try {
	StatFs stat = new StatFs(path);
	return stat.getAvailableBlocks() * (long) stat.getBlockSize() > size;
	} catch (Exception e) {
	Log.i(TAG, "Fail to access external storage", e);
	}
	return false;
	}

	public static boolean isPanorama(MediaItem item) {
	if (item == null) return false;
	int w = item.getWidth();
	int h = item.getHeight();
	return (h > 0 && w / h >= 2);
	}
	// Newly added methods
	public static int getIntPref(Context context, String name, int def) {
	SharedPreferences prefs =
	context.getSharedPreferences(context.getPackageName(), Context.MODE_PRIVATE);
	return prefs.getInt(name, def);
	}

	public static void setIntPref(Context context, String name, int value) {
	SharedPreferences prefs =
	context.getSharedPreferences(context.getPackageName(), Context.MODE_PRIVATE);
	Editor ed = prefs.edit();
	ed.putInt(name, value);
	ed.commit();
	}

	public static boolean getBooleanPref(Context context, String name, boolean def) {
	SharedPreferences prefs =
	context.getSharedPreferences(context.getPackageName(), Context.MODE_PRIVATE);
	return prefs.getBoolean(name, def);
	}

	public static void setBooleanPref(Context context, String name, boolean value) {
	SharedPreferences prefs =
	context.getSharedPreferences(context.getPackageName(), Context.MODE_PRIVATE);
	Editor ed = prefs.edit();
	ed.putBoolean(name, value);
	ed.commit();
	}

	public static String getStringPref(Context context, String name, String def) {
	SharedPreferences prefs =
	context.getSharedPreferences(context.getPackageName(), Context.MODE_PRIVATE);
	return prefs.getString(name, def);
	}

	public static void setStringPref(Context context, String name, String value) {
	SharedPreferences prefs =
	context.getSharedPreferences(context.getPackageName(), Context.MODE_PRIVATE);
	Editor ed = prefs.edit();
	ed.putString(name, value);
	ed.commit();
	}

	public static boolean isTelephonyCallInProgress(Context context) {
	TelephonyManager telephonyManager =
	(TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
	return telephonyManager.getCallState() != TelephonyManager.CALL_STATE_IDLE;
	}
	}