add screen capture and color searching

common/src/main/java/com/stardust/util/ScreenMetrics.java

@@ -12,6 +12,7 @@ public class ScreenMetrics {
     private static int deviceScreenHeight;
     private static int deviceScreenWidth;
     private static boolean initialized = false;
+    private static int deviceScreenDensity;
 
     public static void initIfNeeded(Activity activity) {
         if (!initialized) {
@@ -19,6 +20,7 @@ public class ScreenMetrics {
             activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);
             deviceScreenHeight = metrics.heightPixels;
             deviceScreenWidth = metrics.widthPixels;
+            deviceScreenDensity = metrics.densityDpi;
             initialized = true;
         }
     }
@@ -31,10 +33,26 @@ public class ScreenMetrics {
         return deviceScreenWidth;
     }
 
+    public static int getDeviceScreenDensity() {
+        return deviceScreenDensity;
+    }
+
+    public static int scaleX(int x, int width) {
+        if (width == 0 || !initialized)
+            return x;
+        return x * deviceScreenWidth / width;
+    }
+
+    public static int scaleY(int y, int height) {
+        if (height == 0 || !initialized)
+            return y;
+        return y * deviceScreenHeight / height;
+    }
 
     private int mScreenWidth;
     private int mScreenHeight;
 
+
     public void setScreenWidth(int screenWidth) {
         mScreenWidth = screenWidth;
     }
@@ -44,17 +62,14 @@ public class ScreenMetrics {
     }
 
     public int scaleX(int x) {
-        if (mScreenWidth == 0 || !initialized)
-            return x;
-        return x * deviceScreenWidth / mScreenWidth;
+        return scaleX(x, mScreenWidth);
     }
 
     public int scaleY(int y) {
-        if (mScreenHeight == 0 || !initialized)
-            return y;
-        return y * deviceScreenHeight / mScreenHeight;
+        return scaleY(y, mScreenHeight);
     }
 
+
     public void setScreenMetrics(int width, int height) {
         mScreenWidth = width;
         mScreenHeight = height;