Extract interface for the TemperatureView

/*

 * Copyright 2018 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.systemui.statusbar.car.hvac;

import android.content.Context;

import android.content.res.TypedArray;

import android.util.AttributeSet;

import android.widget.TextView;

import com.android.systemui.Dependency;

import com.android.systemui.R;

/**

 * Simple text display of HVAC properties, It is designed to show temperature and is configured in

 * the XML.

 * XML properties:

 * hvacPropertyId - Example: CarHvacManager.ID_ZONED_TEMP_SETPOINT (16385)

 * hvacAreaId - Example: VehicleSeat.SEAT_ROW_1_LEFT (1)

 * hvacTempFormat - Example: "%.1f\u00B0" (1 decimal and the degree symbol)

 *

 * Note: It registers itself with {@link HvacController}

 */

public class TemperatureTextView extends TextView implements TemperatureView {

    private final int mAreaId;

    private final int mPropertyId;

    private final String mTempFormat;

    public TemperatureTextView(Context context, AttributeSet attrs) {

        super(context, attrs);

        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.TemperatureView);

        mAreaId = typedArray.getInt(R.styleable.TemperatureView_hvacAreaId,-1);

        mPropertyId = typedArray.getInt(R.styleable.TemperatureView_hvacPropertyId, -1);

        String format = typedArray.getString(R.styleable.TemperatureView_hvacTempFormat);

        mTempFormat = (format == null) ? "%.1f\u00B0" : format;

        // register with controller

        HvacController hvacController = Dependency.get(HvacController.class);

        hvacController.addHvacTextView(this);

    }

    /**

     * Formats the float for display

     * @param temp - The current temp or NaN

     */

    @Override

    public void setTemp(float temp) {

        if (Float.isNaN(temp)) {

            setText("--");

            return;

        }

        setText(String.format(mTempFormat, temp));

    }

    /**

     * @return propertiyId  Example: CarHvacManager.ID_ZONED_TEMP_SETPOINT (16385)

     */

    @Override

    public int getPropertyId() {

        return mPropertyId;

    }

    /**

     * @return hvac AreaId - Example: VehicleSeat.SEAT_ROW_1_LEFT (1)

     */

    @Override

    public int getAreaId() {

        return mAreaId;

    }

}

package com.android.systemui.statusbar.car.hvac;

import android.content.Context;

import android.content.res.TypedArray;

import android.util.AttributeSet;

import android.widget.TextView;

import com.android.systemui.Dependency;

import com.android.systemui.R;

/**

 * Simple text display of HVAC properties, It is designed to show temperature and is configured in

 * the XML.

 * XML properties:

 * hvacPropertyId - Example: CarHvacManager.ID_ZONED_TEMP_SETPOINT (16385)

 * hvacAreaId - Example: VehicleSeat.SEAT_ROW_1_LEFT (1)

 * hvacTempFormat - Example: "%.1f\u00B0" (1 decimal and the degree symbol)

 *

 * Note: It registers itself with {@link HvacController}

 * Interface for Views that display temperature HVAC properties

 */

public class TemperatureView extends TextView {

    private final int mAreaId;

    private final int mPropertyId;

    private final String mTempFormat;

    public TemperatureView(Context context, AttributeSet attrs) {

        super(context, attrs);

        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.TemperatureView);

        mAreaId = typedArray.getInt(R.styleable.TemperatureView_hvacAreaId,-1);

        mPropertyId = typedArray.getInt(R.styleable.TemperatureView_hvacPropertyId, -1);

        String format = typedArray.getString(R.styleable.TemperatureView_hvacTempFormat);

        mTempFormat = (format == null) ? "%.1f\u00B0" : format;

        // register with controller

        HvacController hvacController = Dependency.get(HvacController.class);

        hvacController.addHvacTextView(this);

    }

public interface TemperatureView {

    /**

     * Formats the float for display

     *

     * @param temp - The current temp or NaN

     */

    public void setTemp(float temp) {

        if (Float.isNaN(temp)) {

            setText("--");

            return;

        }

        setText(String.format(mTempFormat, temp));

    }

    void setTemp(float temp);

    /**

     * @return propertiyId  Example: CarHvacManager.ID_ZONED_TEMP_SETPOINT (16385)

     */

    public int getPropertyId() {

        return mPropertyId;

    }

    int getPropertyId();

    /**

     * @return hvac AreaId - Example: VehicleSeat.SEAT_ROW_1_LEFT (1)

     */

    public int getAreaId() {

        return mAreaId;

    }

    int getAreaId();

}