Fix and update battery detail page

Bug: 27205329
Change-Id: Ie984348d59c1b15bec7283a94a94489f78cacb79

src/com/android/settings/fuelgauge/BatteryActiveView.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2016 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.settings.fuelgauge;
+
+import android.annotation.Nullable;
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.util.AttributeSet;
+import android.util.SparseIntArray;
+import android.view.View;
+
+public class BatteryActiveView extends View {
+
+    private final Paint mPaint = new Paint();
+    private BatteryActiveProvider mProvider;
+
+    public BatteryActiveView(Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public void setProvider(BatteryActiveProvider provider) {
+        mProvider = provider;
+        if (getWidth() != 0) {
+            postInvalidate();
+        }
+    }
+
+    @Override
+    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
+        super.onSizeChanged(w, h, oldw, oldh);
+        if (getWidth() != 0) {
+            postInvalidate();
+        }
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        if (mProvider == null) {
+            return;
+        }
+        SparseIntArray array = mProvider.getColorArray();
+        float period = mProvider.getPeriod();
+        for (int i = 0; i < array.size() - 1; i++) {
+            drawColor(canvas, array.keyAt(i), array.keyAt(i + 1), array.valueAt(i), period);
+        }
+    }
+
+    private void drawColor(Canvas canvas, int start, int end, int color, float period) {
+        if (color == 0) {
+            return;
+        }
+        mPaint.setColor(color);
+        canvas.drawRect(start / period * getWidth(), 0, end / period * getWidth(), getHeight(),
+                mPaint);
+    }
+
+    public interface BatteryActiveProvider {
+        boolean hasData();
+        long getPeriod();
+        SparseIntArray getColorArray();
+    }
+}