New dialog for ignore battery optimizations

Bug: 21375688
Change-Id: I7240cc0615044cf5a34349e5ffdf2ae2e0f6333f

src/com/android/settings/CheckableLinearLayout.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2015 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;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.util.TypedValue;
+import android.view.View;
+import android.widget.Checkable;
+import android.widget.LinearLayout;
+
+public class CheckableLinearLayout extends LinearLayout implements Checkable {
+
+    private boolean mChecked;
+    private float mDisabledAlpha;
+
+    public CheckableLinearLayout(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        TypedValue alpha = new TypedValue();
+        context.getTheme().resolveAttribute(android.R.attr.disabledAlpha, alpha, true);
+        mDisabledAlpha = alpha.getFloat();
+    }
+
+    @Override
+    public void setEnabled(boolean enabled) {
+        super.setEnabled(enabled);
+        final int N = getChildCount();
+        for (int i = 0; i < N; i++) {
+            getChildAt(i).setAlpha(enabled ? 1 : mDisabledAlpha);
+        }
+    }
+
+    @Override
+    public void setChecked(boolean checked) {
+        mChecked = checked;
+        updateChecked();
+    }
+
+    @Override
+    public boolean isChecked() {
+        return mChecked;
+    }
+
+    @Override
+    public void toggle() {
+        setChecked(!mChecked);
+    }
+
+    private void updateChecked() {
+        final int N = getChildCount();
+        for (int i = 0; i < N; i++) {
+            View child = getChildAt(i);
+            if (child instanceof Checkable) {
+                ((Checkable) child).setChecked(mChecked);
+            }
+        }
+    }
+
+}