UiSettingsDemoActivity.java

/*
 * Copyright (C) 2012 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.google.mcommerce.sample.android.chapter09.googleMap;

import android.os.Bundle;
import android.view.View;
import android.widget.CheckBox;
import android.widget.Toast;

import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.UiSettings;
import com.google.mcommerce.sample.android.R;

/**
 * This shows how UI settings can be toggled.
 */
public class UiSettingsDemoActivity extends android.support.v4.app.FragmentActivity {
    private GoogleMap mMap;
    private UiSettings mUiSettings;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.c09_ui_settings_demo);
        setUpMapIfNeeded();
    }

    @Override
    protected void onResume() {
        super.onResume();
        setUpMapIfNeeded();
    }

    private void setUpMapIfNeeded() {
        // Do a null check to confirm that we have not already instantiated the map.
        if (mMap == null) {
            // Try to obtain the map from the SupportMapFragment.
            mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
                    .getMap();
            // Check if we were successful in obtaining the map.
            if (mMap != null) {
                setUpMap();
            }
        }
    }

    private void setUpMap() {
        mMap.setMyLocationEnabled(true);
        mUiSettings = mMap.getUiSettings();
    }

    /**
     * Checks if the map is ready (which depends on whether the Google Play services APK is
     * available. This should be called prior to calling any methods on GoogleMap.
     */
    private boolean checkReady() {
        if (mMap == null) {
            Toast.makeText(this, R.string.map_not_ready, Toast.LENGTH_SHORT).show();
            return false;
        }
        return true;
    }

    public void setZoomButtonsEnabled(View v) {
        if (!checkReady()) {
            return;
        }
        // Enables/disables the zoom controls (+/- buttons in the bottom right of the map).
        mUiSettings.setZoomControlsEnabled(((CheckBox) v).isChecked());
    }

    public void setCompassEnabled(View v) {
        if (!checkReady()) {
            return;
        }
        // Enables/disables the compass (icon in the top left that indicates the orientation of the
        // map).
        mUiSettings.setCompassEnabled(((CheckBox) v).isChecked());
    }

    public void setMyLocationButtonEnabled(View v) {
        if (!checkReady()) {
            return;
        }
        // Enables/disables the my location button (this DOES NOT enable/disable the my location
        // dot/chevron on the map). The my location button will never appear if the my location
        // layer is not enabled.
        mUiSettings.setMyLocationButtonEnabled(((CheckBox) v).isChecked());
    }

    public void setMyLocationLayerEnabled(View v) {
        if (!checkReady()) {
            return;
        }
        // Enables/disables the my location layer (i.e., the dot/chevron on the map). If enabled, it
        // will also cause the my location button to show (if it is enabled); if disabled, the my
        // location button will never show.
        mMap.setMyLocationEnabled(((CheckBox) v).isChecked());
    }

    public void setScrollGesturesEnabled(View v) {
        if (!checkReady()) {
            return;
        }
        // Enables/disables scroll gestures (i.e. panning the map).
        mUiSettings.setScrollGesturesEnabled(((CheckBox) v).isChecked());
    }

    public void setZoomGesturesEnabled(View v) {
        if (!checkReady()) {
            return;
        }
        // Enables/disables zoom gestures (i.e., double tap, pinch & stretch).
        mUiSettings.setZoomGesturesEnabled(((CheckBox) v).isChecked());
    }

    public void setTiltGesturesEnabled(View v) {
        if (!checkReady()) {
            return;
        }
        // Enables/disables tilt gestures.
        mUiSettings.setTiltGesturesEnabled(((CheckBox) v).isChecked());
    }

    public void setRotateGesturesEnabled(View v) {
        if (!checkReady()) {
            return;
        }
        // Enables/disables rotate gestures.
        mUiSettings.setRotateGesturesEnabled(((CheckBox) v).isChecked());
    }
}