Add source

app/src/main/java/com/hippo/util/UiUtils.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2014-2015 Hippo Seven
+ *
+ * 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
+ * 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.hippo.util;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Color;
+
+public class UiUtils {
+
+    private static float sDensity;
+    private static float sScaledDensity;
+
+    /**
+     * Init UiUtils. Do is in Application.onCreate()
+     *
+     * @param context
+     */
+    public static void init(Context context) {
+        Resources resources = context.getResources();
+
+        sDensity = resources.getDisplayMetrics().density;
+        sScaledDensity = resources.getDisplayMetrics().scaledDensity;
+    }
+
+    /**
+     * dp conversion to pix
+     *
+     * @param dp The value you want to conversion
+     * @return value in pix
+     */
+    public static int dp2pix(float dp) {
+        return (int) (sDensity * dp + 0.5f);
+    }
+
+    /**
+     * pix conversion to dp
+     *
+     * @param pix The value you want to conversion
+     * @return value in dp
+     */
+    public static float pix2dp(int pix) {
+        return pix / sDensity;
+    }
+
+    /**
+     * sp conversion to pix
+     *
+     * @param sp The value you want to conversion
+     * @return value in pix
+     */
+    public static int sp2pix(float sp) {
+        return (int) (sp * sScaledDensity + 0.5f);
+    }
+
+    /**
+     * pix conversion to sp
+     *
+     * @param pix The value you want to conversion
+     * @return value in sp
+     */
+    public static float pix2sp(float pix) {
+        return pix / sScaledDensity;
+    }
+
+    /**
+     * get darker color of target color, alpha not change
+     * @param color the color you want to make it darker
+     * @return new darker color
+     */
+    public static int getDarkerColor(int color) {
+        float[] hsv = new float[3];
+        Color.colorToHSV(color, hsv);
+        hsv[2] *= 0.9f;
+        return Color.HSVToColor(hsv);
+    }
+}

app/src/main/java/com/hippo/util/ViewUtils.java

@@ -245,4 +245,31 @@ public final class ViewUtils {
         return result | (childMeasuredState&MEASURED_STATE_MASK);
     }
 
+    /**
+     * Utility to return a default size. Uses the supplied size if the
+     * MeasureSpec imposed no constraints. Will get suitable if allowed
+     * by the MeasureSpec.
+     *
+     * @param size Default size for this view
+     * @param measureSpec Constraints imposed by the parent
+     * @return The size this view should be.
+     */
+    public static int getSuitableSize(int size, int measureSpec) {
+        int result = size;
+        int specMode = View.MeasureSpec.getMode(measureSpec);
+        int specSize = View.MeasureSpec.getSize(measureSpec);
+
+        switch (specMode) {
+            case View.MeasureSpec.UNSPECIFIED:
+                result = size;
+                break;
+            case View.MeasureSpec.EXACTLY:
+                result = specSize;
+                break;
+            case View.MeasureSpec.AT_MOST:
+                result = size == 0 ? specSize : size;
+        }
+        return result;
+    }
+
 }