Finished the location settings

Change-Id: I333fcc74ad387ef6edaa558656d3eaa91feb8fe9
2013-08-06 13:31:50 -07:00
parent 2500f7a3f5
commit e631423290
8 changed files with 334 additions and 106 deletions
--- a/src/com/android/settings/location/LocationSettingsBase.java
+++ b/src/com/android/settings/location/LocationSettingsBase.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2011 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.location;
+
+import android.content.ContentQueryMap;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.database.Cursor;
+import android.location.LocationManager;
+import android.os.UserManager;
+import android.provider.Settings;
+import android.util.Log;
+
+import com.android.settings.SettingsPreferenceFragment;
+
+import java.util.Observable;
+import java.util.Observer;
+
+/**
+ * A base class that listens to location settings change and modifies location
+ * settings.
+ */
+public abstract class LocationSettingsBase extends SettingsPreferenceFragment {
+    private static final String TAG = LocationSettingsBase.class.getSimpleName();
+
+    /** Location disabled */
+    public static final int MODE_LOCATION_OFF = 0;
+    /** GPS-only */
+    public static final int MODE_SENSORS_ONLY = 1;
+    /** Network location only */
+    public static final int MODE_BATTERY_SAVING = 2;
+    /** GPS and network location */
+    public static final int MODE_HIGH_ACCURACY = 3;
+
+    private ContentQueryMap mContentQueryMap;
+    private Observer mSettingsObserver;
+
+    @Override
+    public void onStart() {
+        super.onStart();
+        // listen for Location Manager settings changes
+        Cursor settingsCursor = getContentResolver().query(Settings.Secure.CONTENT_URI, null,
+                "(" + Settings.System.NAME + "=?)",
+                new String[] { Settings.Secure.LOCATION_PROVIDERS_ALLOWED },
+                null);
+        mContentQueryMap = new ContentQueryMap(settingsCursor, Settings.System.NAME, true, null);
+        mSettingsObserver = new Observer() {
+            @Override
+            public void update(Observable o, Object arg) {
+                refreshLocationMode();
+            }
+        };
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        mContentQueryMap.addObserver(mSettingsObserver);
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        mContentQueryMap.deleteObserver(mSettingsObserver);
+    }
+
+    @Override
+    public void onStop() {
+        super.onStop();
+        mContentQueryMap.close();
+    }
+
+    /** Called when location mode has changed. */
+    public abstract void onModeChanged(int mode);
+
+    public void setLocationMode(int mode) {
+        boolean gps = false;
+        boolean network = false;
+        switch (mode) {
+            case MODE_LOCATION_OFF:
+                break;
+            case MODE_SENSORS_ONLY:
+                gps = true;
+                break;
+            case MODE_BATTERY_SAVING:
+                network = true;
+                break;
+            case MODE_HIGH_ACCURACY:
+                gps = true;
+                network = true;
+                break;
+            default:
+                Log.wtf(TAG, "Invalid location mode: " + mode);
+        }
+        final UserManager um = (UserManager) getActivity().getSystemService(Context.USER_SERVICE);
+        if (um.hasUserRestriction(UserManager.DISALLOW_SHARE_LOCATION)) {
+            return;
+        }
+        // TODO(lifu): use new atomic API to change location mode.
+        Settings.Secure.setLocationProviderEnabled(
+                getContentResolver(), LocationManager.GPS_PROVIDER, gps);
+        Settings.Secure.setLocationProviderEnabled(
+                getContentResolver(), LocationManager.NETWORK_PROVIDER, network);
+        refreshLocationMode();
+    }
+
+    public void refreshLocationMode() {
+        ContentResolver res = getContentResolver();
+        boolean gpsEnabled = Settings.Secure.isLocationProviderEnabled(
+                res, LocationManager.GPS_PROVIDER);
+        boolean networkEnabled = Settings.Secure.isLocationProviderEnabled(
+                res, LocationManager.NETWORK_PROVIDER);
+        boolean enabled = gpsEnabled || networkEnabled;
+        if (!enabled) {
+            onModeChanged(MODE_LOCATION_OFF);
+        } else if (gpsEnabled && !networkEnabled) {
+            onModeChanged(MODE_SENSORS_ONLY);
+        } else if (!gpsEnabled && networkEnabled) {
+            onModeChanged(MODE_BATTERY_SAVING);
+        } else {
+            onModeChanged(MODE_HIGH_ACCURACY);
+        }
+    }
+}