添加不指定Activity名称启动 (#66)

* add adb launch app without activity name

Signed-off-by: Wang Diyuan <wangdiyuan@bytedance.com>

README.en.md

@@ -823,6 +823,7 @@ There are some options addting data for `<INTENT>`, similar to `extra` for Bundl
 | `--ela <EXTRA_KEY> <EXTRA_LONG_VALUE> [, <EXTRA_LONG_VALUE ...]` | long array                             |
 
 ### Launch app / Start an Activity
+> start with Activity's name
 
 The syntax is:
 
@@ -844,6 +845,21 @@ adb shell am start -n org.mazhuang.boottimemeasure/.MainActivity --es "toast" "h
 
 The command above means starting MainActivity of the application with the package name `org.mazhuang.boottimemeasure` with an extra string information (key is 'toast' and value is 'hello, world').
 
+> start without Activity's name
+
+The syntax is:
+
+```sh
+adb shell monkey -p <packagename> -c android.intent.category.LAUNCHER 1
+```
+For example:
+
+```sh
+adb shell monkey -p com.tencent.mm -c android.intent.category.LAUNCHER 1
+```
+
+The command above means starting the launch activity of WeChat.
+
 ### Start a Service
 
 The syntax is:

README.md

@@ -828,6 +828,7 @@ package:/data/app/ecarx.weather-1.apk
 | `--ela <EXTRA_KEY> <EXTRA_LONG_VALUE>[,<EXTRA_LONG_VALUE...]` | long 数组                              |
 
 ### 启动应用/ 调起 Activity
+> 指定Activity名称启动
 
 命令格式：
 
@@ -849,6 +850,21 @@ adb shell am start -n org.mazhuang.boottimemeasure/.MainActivity --es "toast" "h
 
 表示调起 `org.mazhuang.boottimemeasure/.MainActivity` 并传给它 string 数据键值对 `toast - hello, world`。
 
+> 不指定Activity名称启动（启动主Activity）
+
+命令格式：
+
+```sh
+adb shell monkey -p <packagename> -c android.intent.category.LAUNCHER 1
+```
+例如：
+
+```sh
+adb shell monkey -p com.tencent.mm -c android.intent.category.LAUNCHER 1
+```
+
+表示调起微信主界面。
+
 ### 调起 Service
 
 命令格式：