Android Native 应用程序启动 Activity 的方法

调用 /system/bin/am.

用法：

usage: am [subcommand] [options]

start an Activity: am start [-D] [-W] <INTENT>

-D: enable debugging

-W: wait for launch to complete

start a Service: am startservice <INTENT>

send a broadcast Intent: am broadcast <INTENT>

start an Instrumentation: am instrument [flags] <COMPONENT>

-r: print raw results (otherwise decode REPORT_KEY_STREAMRESULT)

-e <NAME> <VALUE>: set argument <NAME> to
<VALUE>

-p <FILE>: write profiling data to <FILE>

-w: wait for instrumentation to finish before returning

start profiling: am profile <PROCESS> start <FILE>

stop profiling: am profile <PROCESS> stop

<INTENT> specifications include these flags:

[-a <ACTION>] [-d <DATA_URI>] [-t <MIME_TYPE>]

[-c <CATEGORY> [-c <CATEGORY>] ...]

[-e|--es <EXTRA_KEY> <EXTRA_STRING_VALUE> ...]

[--esn <EXTRA_KEY> ...]

[--ez <EXTRA_KEY> <EXTRA_BOOLEAN_VALUE> ...]

[-e|--ei <EXTRA_KEY> <EXTRA_INT_VALUE> ...]

[-n <COMPONENT>] [-f <FLAGS>]

[--grant-read-uri-permission] [--grant-write-uri-permission]

[--debug-log-resolution]

[--activity-brought-to-front] [--activity-clear-top]

[--activity-clear-when-task-reset]
[--activity-exclude-from-recents]

[--activity-launched-from-history] [--activity-multiple-task]

[--activity-no-animation] [--activity-no-history]

[--activity-no-user-action] [--activity-previous-is-top]

[--activity-reorder-to-front] [--activity-reset-task-if-needed]

[--activity-single-top]

[--receiver-registered-only] [--receiver-replace-pending]

[<URI>]

am 的源代码在 frameworks/base/cmds/am/src/com/android/commands/am 下面，是基于 Java 的，由于里面直接使用了 IActivieManager，Intent 等 Java 类，因此不能直接移植到 native code，留待以后研究。