Add data saver to settings

Bug: 22817899

Change-Id: Ic3055aa6a5baae1653db350313366f180c049cc7

src/com/android/settings/datausage/SpinnerPreference.java

@@ -0,0 +1,90 @@
+/*
+ * 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.datausage;
+
+import android.content.Context;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceViewHolder;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.Spinner;
+import com.android.settings.R;
+
+public class SpinnerPreference extends Preference implements CycleAdapter.SpinnerInterface {
+
+    private CycleAdapter mAdapter;
+    private AdapterView.OnItemSelectedListener mListener;
+    private Object mCurrentObject;
+    private int mPosition;
+
+    public SpinnerPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        setLayoutResource(R.layout.data_usage_cycles);
+    }
+
+    @Override
+    public void setAdapter(CycleAdapter cycleAdapter) {
+        mAdapter = cycleAdapter;
+        notifyChanged();
+    }
+
+    @Override
+    public void setOnItemSelectedListener(AdapterView.OnItemSelectedListener listener) {
+        mListener = listener;
+    }
+
+    @Override
+    public Object getSelectedItem() {
+        return mCurrentObject;
+    }
+
+    @Override
+    public void setSelection(int position) {
+        mPosition = position;
+        mCurrentObject = mAdapter.getItem(mPosition);
+        notifyChanged();
+    }
+
+    @Override
+    public void onBindViewHolder(PreferenceViewHolder holder) {
+        super.onBindViewHolder(holder);
+        Spinner spinner = (Spinner) holder.findViewById(R.id.cycles_spinner);
+        spinner.setAdapter(mAdapter);
+        spinner.setSelection(mPosition);
+        spinner.setOnItemSelectedListener(mOnSelectedListener);
+    }
+
+    @Override
+    protected void performClick(View view) {
+        view.findViewById(R.id.cycles_spinner).performClick();
+    }
+
+    private final AdapterView.OnItemSelectedListener mOnSelectedListener
+            = new AdapterView.OnItemSelectedListener() {
+        @Override
+        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
+            if (mPosition == position) return;
+            mPosition = position;
+            mCurrentObject = mAdapter.getItem(position);
+            mListener.onItemSelected(parent, view, position, id);
+        }
+
+        @Override
+        public void onNothingSelected(AdapterView<?> parent) {
+            mListener.onNothingSelected(parent);
+        }
+    };
+}