Intent 匹配
使用 PackageManager 返回能接受特定 Intent 的组件
判断是否有 Activity 能处理 Intent
强制使用应用选择器
Intent sendIntent = new Intent(Intent.ACTION_SEND);
...
// Always use string resources for UI text.
// This says something like "Share this photo with"
String title = getResources().getString(R.string.chooser_title);
// Create intent to show the chooser dialog
Intent chooser = Intent.createChooser(sendIntent, title);
// Verify the original intent will resolve to at least one activity
if (sendIntent.resolveActivity(getPackageManager()) != null) {
startActivity(chooser);
}
点击链接启动其它应用
通过 Intent 实现，需要其它应用注册了对应的 intent-filter，包括 action、category 及 data（schema、host、pathPrefix）和 mimeType 等。
打开系统设置界面
android.provider.Settings类提供android系统各个页面的跳转常量，比如打开“开发者选项”页面：
startActivity(new Intent(Settings.ACTION_APPLICATION_DEVELOPMENT_SETTINGS));
Action 列表（有可能需要配合包名类名打开）：
| Action | 功能 | 原文 |
|---|---|---|
| ACTION_ACCESSIBILITY_SETTINGS | 辅助功能模块的显示设置。 | Activity Action: Show settings for accessibility modules. |
| ACTION_ADD_ACCOUNT | 显示屏幕上创建一个新帐户添加帐户。 | Activity Action: Show add account screen for creating a new account. |
| ACTION_AIRPLANE_MODE_SETTINGS | 显示设置，以允许进入/退出飞行模式。 | Activity Action: Show settings to allow entering/exiting airplane mode. |
| ACTION_APN_SETTINGS | 显示设置，以允许配 置的APN。 | Activity Action: Show settings to allow configuration of APNs. |
| ACTION_APPLICATION_DETAILS_SETTINGS | 有关特定应用程序的详细信息的显示屏幕。 | Activity Action: Show screen of details about a particular application. |
| ACTION_APPLICATION_DEVELOPMENT_SETTINGS | 显示设置，以允许应用程序开发相关的设置配置 | Activity Action: Show settings to allow configuration of application development-related settings. |
| ACTION_APPLICATION_SETTINGS | 显示设置，以允许应用程序相关的设置配置 | Activity Action: Show settings to allow configuration of application-related settings. |
| ACTION_BLUETOOTH_SETTINGS | 显示设置，以允许蓝牙配置 | Activity Action: Show settings to allow configuration of Bluetooth. |
| ACTION_DATA_ROAMING_SETTINGS | 选择of2G/3G显示设置 | Activity Action: Show settings for selection of2G/3G. |
| ACTION_DATE_SETTINGS | 显示日期和时间设置，以允许配 置 | Activity Action: Show settings to allow configuration of date and time. |
| ACTION_DEVICE_INFO_SETTINGS | 显示一般的设备信息设置（序列号，软件版本，电话号码，等） | Activity Action: Show general device information settings (serial number, software version, phone number, etc.). |
| ACTION_DISPLAY_SETTINGS | 显示设置，以允许配 置显示 | Activity Action: Show settings to allow configuration of display. |
| ACTION_INPUT_METHOD_SETTINGS | 特别配置的输入方法，允许用户启用输入法的显示设置 | Activity Action: Show settings to configure input methods, in particular allowing the user to enable input methods. |
| ACTION_INPUT_METHOD_SUBTYPE_SETTINGS | 显示设置来启用/禁用输入法亚型 | Activity Action: Show settings to enable/disable input method subtypes. |
| ACTION_INTERNAL_STORAGE_SETTINGS | 内部存储的显示设置 | Activity Action: Show settings for internal storage. |
| ACTION_LOCALE_SETTINGS | 显示设置，以允许配 置的语言环境 | Activity Action: Show settings to allow configuration of locale. |
| ACTION_LOCATION_SOURCE_SETTINGS | 显示设置，以允许当前位置源的配置 | Activity Action: Show settings to allow configuration of current location sources. |
| ACTION_MANAGE_ALL_APPLICATIONS_SETTINGS | 显示设置来管理所有的应用程序 | Activity Action: Show settings to manage all applications. |
| ACTION_MANAGE_APPLICATIONS_SETTINGS | 显示设置来管理安装的应用程序 | Activity Action: Show settings to manage installed applications. |
| ACTION_MEMORY_CARD_SETTINGS | 显示设置为存储卡存储 | Activity Action: Show settings for memory card storage. |
| ACTION_NETWORK_OPERATOR_SETTINGS | 选择网络运营商的显示设置 | Activity Action: Show settings for selecting the network operator. |
| ACTION_PRIVACY_SETTINGS | 显示设置，以允许配 置隐私选项 | Activity Action: Show settings to allow configuration of privacy options. |
| ACTION_QUICK_LAUNCH_SETTINGS | 显示设置，以允许快速启动快捷键的配置 | Activity Action: Show settings to allow configuration of quick launch shortcuts. |
| ACTION_SEARCH_SETTINGS | 全局搜索显示设置 | Activity Action: Show settings for global search. |
| ACTION_SECURITY_SETTINGS | 显示设置，以允许配 置的安全性和位置隐私 | Activity Action: Show settings to allow configuration of security and location privacy. |
| ACTION_SETTINGS | 显示系统设置 | Activity Action: Show system settings. |
| ACTION_SOUND_SETTINGS | 显示设置，以允许配 置声音和音量 | Activity Action: Show settings to allow configuration of sound and volume. |
| ACTION_SYNC_SETTINGS | 显示设置，以允许配 置同步设置 | Activity Action: Show settings to allow configuration of sync settings. |
| ACTION_USER_DICTIONARY_SETTINGS | 显示设置来管理用户输入字典 | Activity Action: Show settings to manage the user input dictionary. |
| ACTION_WIFI_IP_SETTINGS | 显示设置，以允许配 置一个静态IP地址的Wi – Fi | Activity Action: Show settings to allow configuration of a static IP address for Wi-Fi. |
| ACTION_WIFI_SETTINGS | 显示设置，以允许Wi – Fi配置 | Activity Action: Show settings to allow configuration of Wi-Fi. |
| ACTION_WIRELESS_SETTINGS | 显示设置，以允许配 置，如Wi – Fi，蓝牙和移动网络的无线控制 | Activity Action: Show settings to allow configuration of wireless controls such as Wi-Fi, Bluetooth and Mobile networks. |
| AUTHORITY | ||
| EXTRA_AUTHORITIES | 在推出活动的基础上给予的权力限制可选项。 | Activity Extra: Limit available options in launched activity based on the given authority. |
| EXTRA_INPUT_METHOD_ID |