获取位置服务总开关状态

//获取LOCATION_MODE值，但adb状态下无法获取
//0为关闭，1 gps、2 network、3 高精度等
int state = Settings.Secure.getInt(mContext.getContentResolver(),Settings.Secure.LOCATION_MODE,Settings.Secure.LOCATION_MODE_HIGH_ACCURACY);
//获取location_providers_allowed，adb状态下可以读取
String s = Settings.Secure.getString(mContext.getContentResolver(),"location_providers_allowed");

实现

Android5-8

修改Settings.Secure+发送广播

private void setLocationEnabled(Context context, int mode){int oldMode = Settings.Secure.getInt(context.getContentResolver(),Settings.Secure.LOCATION_MODE,Settings.Secure.LOCATION_MODE_OFF);updateLocationMode(context, oldMode, mode);
}private boolean updateLocationMode(Context context, int oldMode, int newMode) {Intent intent = new Intent("com.android.settings.location.MODE_CHANGING");intent.putExtra("CURRENT_MODE", oldMode);intent.putExtra("NEW_MODE", newMode);context.sendBroadcast(intent, android.Manifest.permission.WRITE_SECURE_SETTINGS);return Settings.Secure.putInt(context.getContentResolver(), Settings.Secure.LOCATION_MODE, newMode);
}

Android9

@RequiresApi(api = Build.VERSION_CODES.P)
public static void setProviderEnabledForUser(Context context, String provider, boolean enabled){LocationManager locationManager = (LocationManager)context.getSystemService(Context.LOCATION_SERVICE);try{Field field = UserHandle.class.getDeclaredField("SYSTEM");field.setAccessible(true);UserHandle userHandle = (UserHandle) field.get(UserHandle.class);Method method = LocationManager.class.getDeclaredMethod("setProviderEnabledForUser",String.class,boolean.class,serHandle.class);method.invoke(locationManager, provider, enabled, userHandle);}catch(Exception e){Log.e(TAG, "can not setProviderEnabledForUser:(" + provider +"," + enabled +")");}
}

Android10以上

@RequiresApi(api = Build.VERSION_CODES.Q)
public static void setLocationEnabledForUser(Context context, boolean enabled){LocationManager locationManager = (LocationManager)context.getSystemService(Context.LOCATION_SERVICE);try{Field field = UserHandle.class.getDeclaredField("SYSTEM");field.setAccessible(true);UserHandle userHandle = (UserHandle) field.get(UserHandle.class);Method method = LocationManager.class.getDeclaredMethod("setLocationEnabledForUser",boolean.class,UserHandle.class);method.invoke(locationManager, enabled, userHandle);}catch(Exception e){Log.e(TAG, "can not setLocationEnabledForUser:(" + enabled +")");}
}

实例

关闭位置信息总开关：

public class LocationUtil {private static void updateLocationMode(Context context, int oldMode, int newMode) {Intent intent = new Intent("com.android.settings.location.MODE_CHANGING");intent.putExtra("CURRENT_MODE", oldMode);intent.putExtra("NEW_MODE", newMode);context.sendBroadcast(intent, android.Manifest.permission.WRITE_SECURE_SETTINGS);Settings.Secure.putInt(context.getContentResolver(), Settings.Secure.LOCATION_MODE, newMode);}/*** Settings.Secure.LOCATION_MODE_OFF // 关闭* Settings.Secure.LOCATION_MODE_SENSORS_ONLY // GPS only* Settings.Secure.LOCATION_MODE_BATTERY_SAVING // 降低GPS上报频率* Settings.Secure.LOCATION_MODE_HIGH_ACCURACY // 高精度*/public static void setLocationEnabled(Context context, int mode){int oldMode = Settings.Secure.getInt(context.getContentResolver(),Settings.Secure.LOCATION_MODE,Settings.Secure.LOCATION_MODE_OFF);updateLocationMode(context, oldMode, mode);}
}

定位默认高精度

Android8.1版本

1.修改xml文件

地址：\SettingsProvider\res\values

<string name="def_location_providers_allowed" translatable="false">gps,network</string>

该种方法只针对于国内系统有效
注：当手动切换到低耗电模式时，重启后会自动开启高精度
当修改含有GMS的海外系统时，单纯修改xml字符串无效，会出现：
1).重启后生效
2).进安卓设置页面后恢复
3).恢复出厂设置后重置
排查原因：
由于是海外系统，有gms
手动点进设置中切换时会有弹窗提示，所以需要在开机之后通过代码进行修改
应用需要满足：
1).系统应用
2).gms开机启动慢，所以选择在接收到开机广播后进行处理，在AndroidMainfest.xml中声明权限

    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>

网上查到都是在Launcher的onCreate进行延迟处理，但客户需求不打包UI，而且还要考虑到主题切换等操作，所以在对应的系统应用中添加，用广播处理是一样的。

2.修改java文件

adb获取为null，即用户没有手动更改过定位模式

adb shell settings get system location_mode_changed

注：需要手动切换后再次获取，看看该属性值是否有变化
若无变化，可参考文章：android 默认打开高精度定位模式，accept Improve location accuracy
在Android8.1中，LocationMode.java中有将location_mode_changed属性值进行改变，以达到判断用户手动设置

在开机广播进行处理

// 判断用户是否手动设置了定位模式
int mode = Settings.System.getInt(getContentResolver(), "location_mode_changed", 0); ContentResolver localContentResolver = getContentResolver();
ContentValues localContentValues = new ContentValues();
localContentValues.put("name", "network_location_opt_in");
localContentValues.put("value", 1);  
localContentResolver.insert(Uri.parse("content://com.google.settings/partner"), localContentValues);if(mode == 0){Settings.Secure.setLocationProviderEnabled(localContentResolver, "network", true);
}