Android Studio Delete Module
1.选中Module右击，选择 Open Module Settings，打开Project Structure 窗空。（或者选中Module，按F4打开Project Structure窗口）
2.选中要移除的Module，点击 “-” Remove Module，然后点击OK。
3.再次选中Module右击，就会出现Delete操作，点击Delete移除Module。（或者选中Module按Delete键）
Make Project vs Rebuild Project
The Build > Make Project option compiles all the source files in the entire project that have been modified since the last compilation.
The Build > Rebuild Project option recomplies all the source files in the project.
- Compile <compilation_scope>. All the source files in the specified scope are compiled. The scope in this case may be a file, a package, etc.
- Make Project. All the source files in the entire project that have been modified since the last compilation are compiled. Dependent source files, if appropriate, are also compiled. Additionally, the tasks tied to the compilation or make process on modified sources are performed. For example, EJB validation is performed if the corresponding option is enabled on the Validation page.
- Make Module. Compiled are all the source files that have been modified since the last compilation in the selected module as well as in all the modules it depends on recursively.
- Rebuild Project. All the source files in the project are recompiled. This may be necessary when the classpath entries have changed, for example, SDKs or libraries being used added, removed or altered.
Content Assist Class Name Completion
Alt+/ Ctrl+Alt+Space
4.Delete line Copy Line
CTRL + Y CTRL + D (Win)
CMD + Backspace CMD + D(Mac)
alt + f7 = find usage
ctrl + q = quick documentation
shift + f6 = refactor
ctrl + o = overide
ctrl + i = implement
ctrl + space = code completion
ctrl + shift + space = smarttype
ctrl + w = select word
alt + ins = generete code (getter, setter, constructor
ctrl + alt + l = reformat code
ctrl + y = delete line
ctrl + alt + t = surround with
alt + shift + up / down = move line up / down
ctrl + d = copy line
ctrl + h = Type Hierarchy
command+F12 = File Structure
psvm = public static void main
sout = System.out.println