Improve download item UI

2016-02-27 17:35:50 +08:00
1 parent 85d4bc814f
commit 11d492c8fa
@@ -0,0 +1,164 @@
+/*
+ * Copyright 2016 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
+ * 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.hippo.ehviewer;
+
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.graphics.RectF;
+import android.os.Environment;
+
+import junit.framework.TestCase;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.OutputStream;
+
+public class CardBgTest extends TestCase {
+
+    private static final float[] TOP_ALPHA = {
+            0f, // Dump
+            0.12f,
+            0.16f,
+            0.19f,
+            0.25f,
+            0.30f,
+    };
+
+    private static final float[] TOP_OFFSET = {
+            0f, // Dump
+            1f,
+            3f,
+            10f,
+            14f,
+            19f,
+    };
+
+    private static final float[] TOP_BLUR = {
+            0f, // Dump
+            1.5f,
+            3f,
+            10f,
+            14f,
+            19f,
+    };
+
+    private static final float[] BOTTOM_ALPHA = {
+            0f, // Dump
+            0.24f,
+            0.23f,
+            0.23f,
+            0.22f,
+            0.22f,
+    };
+
+    private static final float[] BOTTOM_OFFSET = {
+            0f, // Dump
+            1f,
+            3f,
+            6f,
+            10f,
+            15f,
+    };
+
+    private static final float[] BOTTOM_BLUR = {
+            0f, // Dump
+            1f,
+            3f,
+            3f,
+            5f,
+            6f,
+    };
+
+    private static final int MAX_SIZE = 200;
+
+
+    public void testGen() throws FileNotFoundException {
+        genCardBg(Color.WHITE, 2, 2);
+    }
+
+    private Path getPath(float radius, float base) {
+        RectF rectF = new RectF();
+        Path path = new Path();
+        path.moveTo(base / 2, -base / 2 - radius);
+        rectF.set(base / 2 - radius, -base / 2 - radius, base / 2 + radius, -base / 2 + radius);
+        path.arcTo(rectF, -90, 90);
+        path.lineTo(base / 2 + radius, base / 2);
+        rectF.set(base / 2 - radius, base / 2 - radius, base / 2 + radius, base / 2 + radius);
+        path.arcTo(rectF, 0, 90);
+        path.lineTo(-base / 2, base / 2 + radius);
+        rectF.set(-base / 2 - radius, base / 2 - radius, -base / 2 + radius, base / 2 + radius);
+        path.arcTo(rectF, 90, 90);
+        path.lineTo(-base / 2 - radius, -base / 2);
+        rectF.set(-base / 2 - radius, -base / 2 - radius, -base / 2 + radius, -base / 2 + radius);
+        path.arcTo(rectF, 180, 90);
+        path.close();
+        return path;
+    }
+
+    private void genCardBg(int color, float radius, int elevation) throws FileNotFoundException {
+
+        float base = 4;
+        float topAlpha = TOP_ALPHA[elevation];
+        float topOffset = TOP_OFFSET[elevation];
+        float topBlur = TOP_BLUR[elevation];
+        float bottomAlpha = BOTTOM_ALPHA[elevation];
+        float bottomOffset = BOTTOM_OFFSET[elevation];
+        float bottomBlur = BOTTOM_BLUR[elevation];
+
+
+        float ratio = 3;
+
+
+        doGenCardBg(new FileOutputStream(new File(Environment.getExternalStorageDirectory(),  "test.png")),
+                color, radius * ratio, base * ratio,
+                topAlpha, topOffset * ratio, topBlur * ratio,
+                bottomAlpha, bottomOffset * ratio, bottomBlur * ratio);
+
+
+    }
+
+    private int getColor(float alpha) {
+        return Color.argb((int) (alpha * 0xff), 0, 0, 0);
+    }
+
+    private void doGenCardBg(OutputStream os, int color, float radius, float base,
+            float topAlpha, float topOffset, float topBlur,
+            float bottomAlpha, float bottomOffset, float bottomBlur) throws FileNotFoundException {
+
+        Path path = getPath(radius, base);
+        path.offset(MAX_SIZE / 2, MAX_SIZE / 2);
+
+        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DITHER_FLAG);
+        paint.setColor(color);
+        Bitmap bitmap = Bitmap.createBitmap(MAX_SIZE, MAX_SIZE, Bitmap.Config.ARGB_8888);
+        Canvas canvas = new Canvas(bitmap);
+
+        // Draw bottom
+        paint.setShadowLayer(bottomBlur, 0, bottomOffset, getColor(bottomAlpha));
+        canvas.drawPath(path, paint);
+
+        // Draw top
+        paint.setShadowLayer(topBlur, 0, topOffset, getColor(topAlpha));
+        canvas.drawPath(path, paint);
+
+        bitmap.compress(Bitmap.CompressFormat.PNG, 100, os);
+    }
+}