Merge pull request #1355 from smartdevicelink/ios_Alignment/LockScreen

iOS alignment/lock screen

Author: Robert Henigan

android/sdl_android/src/main/java/com/smartdevicelink/managers/lockscreen/SDLLockScreenActivity.java

@@ -38,9 +38,14 @@
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.graphics.Bitmap;
+import android.graphics.Color;
+import android.graphics.ColorFilter;
+import android.graphics.ColorMatrixColorFilter;
+import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.view.GestureDetector;
 import android.view.MotionEvent;
+import android.view.View;
 import android.view.Window;
 import android.widget.ImageView;
 import android.widget.RelativeLayout;
@@ -64,6 +69,9 @@ public class SDLLockScreenActivity extends Activity {
 	private static final int MIN_SWIPE_DISTANCE = 200;
 	private boolean mIsDismissible;
 	private GestureDetector mGestureDetector;
+	private int backgroundColor = Color.parseColor("#394e60");
+	private boolean useWhiteIconAndTextColor;
+
 
 	private final BroadcastReceiver lockScreenBroadcastReceiver = new BroadcastReceiver() {
 		@Override
@@ -137,18 +145,20 @@ public void initializeActivity(Intent intent){
 			int customIcon = intent.getIntExtra(LOCKSCREEN_ICON_EXTRA, 0);
 			int customView = intent.getIntExtra(LOCKSCREEN_CUSTOM_VIEW_EXTRA, 0);
 			Bitmap deviceIcon = intent.getParcelableExtra(LOCKSCREEN_DEVICE_LOGO_BITMAP);
+			backgroundColor = (customColor != 0) ? customColor : backgroundColor;
 
 			if (customView != 0){
 				setCustomView(customView);
 			} else {
 				setContentView(R.layout.activity_sdllock_screen);
+				setBackgroundColor();
+				useWhiteIconAndTextColor = shouldUseWhiteForegroundForBackgroundColor();
 
-				if (customColor != 0){
-					changeBackgroundColor(customColor);
-				}
-
+				// set Lock Screen Icon
 				if (customIcon != 0){
 					changeIcon(customIcon);
+				} else {
+					setSdlLogo();
 				}
 
 				if (deviceLogoEnabled && deviceIcon != null){
@@ -158,19 +168,85 @@ public void initializeActivity(Intent intent){
 				String warningMsg = intent.getStringExtra(KEY_LOCKSCREEN_WARNING_MSG);
 				if (mIsDismissible) {
 					setLockscreenWarningMessage(warningMsg);
+				} else if (!useWhiteIconAndTextColor) {
+					setTextColorBlack();
 				}
 			}
 		}
 	}
 
-	private void changeBackgroundColor(int customColor) {
+	/**
+	 *  Sets the lockScreen logo
+	 */
+	private void setSdlLogo() {
+		ImageView lockScreen_iv = findViewById(R.id.lockscreen_image);
+		Drawable sdlIcon = getResources().getDrawable(R.drawable.sdl_lockscreen_icon);
+		// Checks color contrast and determines if the logo should be black or white
+		if (useWhiteIconAndTextColor) {
+			int color = Color.parseColor("#ffffff");
+
+			int red = (color & 0xFF0000) / 0xFFFF;
+			int green = (color & 0xFF00) / 0xFF;
+			int blue = color & 0xFF;
+
+			float[] matrix = {0, 0, 0, 0, red,
+					0, 0, 0, 0, green,
+					0, 0, 0, 0, blue,
+					0, 0, 0, 1, 0};
+
+			ColorFilter colorFilter = new ColorMatrixColorFilter(matrix);
+			sdlIcon.setColorFilter(colorFilter);
+		}
+		lockScreen_iv.setImageDrawable(sdlIcon);
+	}
+
+	/**
+	 * Changes the text color to white on the lockScreen
+	 */
+	private void setTextColorBlack() {
+		TextView tv = findViewById(R.id.lockscreen_text);
+		tv.setTextColor(Color.parseColor("#000000"));
+	}
+
+	/**
+	 *  Calculates the contrast of the background to determine if the Icon and Text color
+	 *  should be white or black
+	 * @return True if Background and Icon should be white, False if black
+	 */
+	private boolean shouldUseWhiteForegroundForBackgroundColor() {
+		float r = Color.red(backgroundColor) / 255f;
+		float b = Color.blue(backgroundColor) / 255f;
+		float g = Color.green(backgroundColor) / 255f;
+
+		// http://stackoverflow.com/a/3943023
+		r = (r <= 0.3928f) ? (r / 12.92f) : (float) Math.pow(((r + 0.055f) / 1.055f), 2.4f);
+		g = (g <= 0.3928f) ? (g / 12.92f) : (float) Math.pow(((g + 0.055f) / 1.055f), 2.4f);
+		b = (b <= 0.3928f) ? (b / 12.92f) : (float) Math.pow(((b + 0.055f) / 1.055f), 2.4f);
+
+		float luminescence = 0.2126f * r + 0.7152f * g + 0.0722f * b;
+		return luminescence <= 0.179;
+	}
+
+	/**
+	 * Sets the color of the background
+	 * Will use default color if not set in LockScreenConfig
+	 */
+	private void setBackgroundColor() {
 		RelativeLayout layout = findViewById(R.id.lockscreen_relative_layout);
-		layout.setBackgroundColor(getResources().getColor(customColor));
+		layout.setBackgroundColor(backgroundColor);
 	}
 
+	/**
+	 * Used to change LockScreen default Icon to customIcon set in LockScreenConfig
+	 * @param customIcon
+	 */
 	private void changeIcon(int customIcon) {
-		ImageView lockscreen_iv = findViewById(R.id.lockscreen_image);
-		lockscreen_iv.setBackgroundResource(customIcon);
+		ImageView lockScreen_iv = findViewById(R.id.lockscreen_image);
+		lockScreen_iv.setVisibility(View.GONE);
+
+		ImageView lockScreenCustom_iv = findViewById(R.id.appIcon);
+		lockScreenCustom_iv.setVisibility(View.VISIBLE);
+		lockScreenCustom_iv.setBackgroundResource(customIcon);
 	}
 
 	private void setDeviceLogo(Bitmap deviceLogo) {
@@ -183,6 +259,9 @@ private void setDeviceLogo(Bitmap deviceLogo) {
 	private void setLockscreenWarningMessage(String msg) {
 		TextView tv = findViewById(R.id.lockscreen_text);
 		if (tv != null) {
+			if (!useWhiteIconAndTextColor) {
+				tv.setTextColor(Color.parseColor("#000000"));
+			}
 			tv.setText(msg != null ? msg : getString(R.string.default_lockscreen_warning_message));
 		}
 	}

android/sdl_android/src/main/res/drawable-hdpi/sdl_lockscreen_icon.png

@@ -1,8 +1,7 @@
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                 android:id="@+id/lockscreen_relative_layout"
                 android:layout_width="fill_parent"
-                android:layout_height="fill_parent"
-                android:background="#2c3d4d">
+                android:layout_height="fill_parent">
 
     <LinearLayout
         android:id="@+id/lockscreen_linear_layout"
@@ -13,12 +12,21 @@
 
         <ImageView
             android:id="@+id/lockscreen_image"
+            android:layout_width="187dp"
+            android:layout_height="78dp"
+            android:scaleType="fitXY"
+            android:layout_gravity="center_horizontal"
+            android:contentDescription="@string/lockscreen_image_description"
+            android:adjustViewBounds="true" />
+
+        <ImageView
+            android:id="@+id/appIcon"
             android:layout_width="120dp"
             android:layout_height="120dp"
             android:scaleType="fitXY"
             android:layout_gravity="center_horizontal"
             android:contentDescription="@string/lockscreen_image_description"
-            android:background="@drawable/sdl_lockscreen_icon"/>
+            android:visibility="gone"/>
 
         <ImageView
             android:id="@+id/device_image"