系统定义的常量
有时候需要跳转到一些系统设置界面，为了方便寻找总结一下
定义Intent相关界面ACTION_SETTINGS系统设置界面ACTION_APN_SETTINGSAPN设置界面ACTION_LOCATION_SOURCE_SETTINGS定位设置界面ACTION_AIRPLANE_MODE_SETTINGS更多连接方式设置界面ACTION_DATA_ROAMING_SETTINGS双卡和移动网络设置界面ACTION_ACCESSIBILITY_SETTINGS无障碍设置界面ACTION_SYNC_SETTINGS同步设置界面ACTION_ADD_ACCOUNT添加账户界面ACTION_NETWORK_OPERATOR_SETTINGS选取运营商的界面ACTION_SECURITY_SETTINGS安全设置界面ACTION_PRIVACY_SETTINGS备份重置设置界面ACTION_VPN_SETTINGSVPN设置界面,可能不存在ACTION_WIFI_SETTINGS无线网设置界面ACTION_WIFI_IP_SETTINGSWIFI的IP设置ACTION_BLUETOOTH_SETTINGS蓝牙设置ACTION_CAST_SETTINGS投射设置ACTION_DATE_SETTINGS日期时间设置ACTION_SOUND_SETTINGS声音设置ACTION_DISPLAY_SETTINGS显示设置ACTION_LOCALE_SETTINGS语言设置ACTION_VOICE_INPUT_SETTINGS辅助应用和语音输入设置ACTION_INPUT_METHOD_SETTINGS语言和输入法设置ACTION_USER_DICTIONARY_SETTINGS个人字典设置界面ACTION_INTERNAL_STORAGE_SETTINGS存储空间设置的界面ACTION_SEARCH_SETTINGS搜索设置界面ACTION_APPLICATION_DEVELOPMENT_SETTINGS开发者选项设置ACTION_DEVICE_INFO_SETTINGS手机状态信息的界面ACTION_DREAM_SETTINGS互动屏保设置的界面ACTION_NOTIFICATION_LISTENER_SETTINGS通知使用权设置的界面ACTION_NOTIFICATION_POLICY_ACCESS_SETTINGS勿扰权限设置的界面ACTION_CAPTIONING_SETTINGS字幕设置的界面ACTION_PRINT_SETTINGS打印设置界面ACTION_BATTERY_SAVER_SETTINGS节电助手界面ACTION_HOME_SETTINGS主屏幕设置界面简单使用
非常简单的操作
import android.provider.Settings;//导包
Intent intent = new Intent(Settings.ACTION_SETTINGS);
startActivity(intent);