Android

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Android Studio

From WikiOD

Setup Android Studio[edit | edit source]

System Requirements

  • Microsoft® Windows® 8/7/Vista/2003 (32 or 64-bit).
  • Mac® OS X® 10.8.5 or higher, up to 10.9 (Mavericks)
  • GNOME or KDE desktop

Installation

Window

  1. Download and install JDK (Java Development Kit) version 8
  2. Download Android Studio
  3. Launch Android Studio.exe then mention JDK path and download the latest SDK

Linux

  1. Download and install JDK (Java Development Kit) version 8
  2. Download Android Studio
  3. Extract the zip file
  4. Open terminal, cd to the extracted folder, cd to bin (example cd android-studio/bin)
  5. Run ./studio.sh

View And Add Shortcuts in Android Studio[edit | edit source]

By going to Settings >> Keymap A window will popup showing All the Editor Actions with the their name and shortcuts. Some of the Editor Actions do not have shortcuts. So right click on that and add a new shortcut to that.

Check the image below

Android_Studio

Custom colors of logcat message based on message importance[edit | edit source]

Go to File -> Settings -> Editor -> Colors & Fonts -> Android Logcat

Change the colors as you need:

Android_Studio

Choose the appropriate color:

Android_Studio

Enable/Disable blank line copy[edit | edit source]

ctrl + alt + shift + / (cmd + alt + shift + / on MacOS) should show you the following dialog:

Android_Studio

Clicking on Registry you will get

Android_Studio

The key you want to enable/disable is

editor.skip.copy.and.cut.for.empty.selection

Tested on Linux Ubuntu and MacOS.

Android Studio useful shortcuts[edit | edit source]

The following are some of the more common/useful shortcuts.

These are based on the default IntelliJ shortcut map. You can switch to other common IDE shortcut maps via File -> Settings -> Keymap -> <Choose Eclipse/Visual Studio/etc from Keymaps dropdown>

Action Shortcut
Format code CTRL + ALT + L
Add unimplemented methods CTRL + I
Show logcat ALT + 6
Build CTRL + F9
Build and Run CTRL + F10
Find CTRL + F
Find in project CTRL+SHIFT + F
Find and replace CTRL + R
Find and replace in project CTRL + SHIFT + R
Override methods CTRL + O
Show project ALT + 1
Hide project - logcat SHIFT + ESC
Collapse all CTRL + SHIFT + NumPad +
View Debug Points CTRL + SHIFT + F8
Expand all CTRL + SHIFT + NumPad -
Open Settings ALT + s
Select Target (open current file in Project view) ALT + F1 → ENTER
Search Everywhere SHIFT → SHIFT (Double shift)
Surround With CTRL → ALT + T
Create method form selected code ALT + CTRL

Refactor:

Action Shortcut
Refactor This (menu/picker for all applicable refactor actions of the current element) Mac CTRL + T - Win/Linux CTRL + ALT + T
Rename SHIFT + F6
Extract Method Mac CMD + ALT + M - Win/Linux CTRL + ALT + M
Extract Parameter Mac CMD + ALT + P - Win/Linux CTRL + ALT + P
Extract Variable Mac CMD + ALT + V - Win/Linux CTRL + ALT + V

Android Studio Improve performance tip[edit | edit source]

Enable Offline Work:

  1. Click File -> Settings. Search for "gradle" and click in Offline work box.
  2. Go to Compiler (in same settings dialog just below Gradle) and add --offline to Command-line Options text box.

Improve Gradle Performance

Add following two line of code in your gradle.properties file.

org.gradle.daemon=true
org.gradle.parallel=true

Increasing the value of -Xmx and -Xms in studio.vmoptions file

-Xms1024m
-Xmx4096m
-XX:MaxPermSize=1024m
-XX:ReservedCodeCacheSize=256m
-XX:+UseCompressedOops

Window

%USERPROFILE%.{FOLDER_NAME}\studio.exe.vmoptions and/or %USERPROFILE%.{FOLDER_NAME}\studio64.exe.vmoptions

Mac

~/Library/Preferences/{FOLDER_NAME}/studio.vmoptions

Linux

~/.{FOLDER_NAME}/studio.vmoptions and/or ~/.{FOLDER_NAME}/studio64.vmoptions

Filter logs from UI[edit | edit source]

Android logs can be filtered directly from the UI. Using this code

public class MainActivity extends AppCompatActivity {
    private final static String TAG1 = MainActivity.class.getSimpleName();
    private final static String TAG2 = MainActivity.class.getCanonicalName();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Log.e(TAG1,"Log from onCreate method with TAG1");
        Log.i(TAG2,"Log from onCreate method with TAG2");
    }
}

If I use the regex TAG1|TAG2 and the level verbose I get

01*14 10:34:46.961 12880-12880/android.doc.so.thiebaudthomas.sodocandroid E/MainActivity: Log from onCreate method with TAG1
01*14 10:34:46.961 12880-12880/android.doc.so.thiebaudthomas.sodocandroid I/androdi.doc.so.thiebaudthomas.sodocandroid.MainActivity: Log from onCreate method with TAG2

Android_Studio

The level can be set to get logs with given level and above. For example the verbose level will catch verbose, debug, info, warn, error and assert logs.

Using the same example, if I set the level to error, I only get

01*14 10:34:46.961 12880-12880/androdi.doc.so.thiebaudthomas.sodocandroid E/MainActivity: Log from onCreate method with TAG1

Android_Studio

Create filters configuration[edit | edit source]

Custom filters can be set and save from the UI. In the AndroidMonitor tab, click on the right dropdown (must contains Show only selected application or No filters) and select Edit filter configuration.

Enter the filter you want

Android_Studio

And use it (you can selected it from the same dropdown)

Android_Studio

Important If you add an input in the filter bar, android studio will consider both your filter and your input.

With both input and filter there is no output Custom filter with input

Without filter, there is some outputs Filter input only

Gradle build project takes forever[edit | edit source]

Android Studio -> Preferences -> Gradle -> Tick Offline work and then restart your Android studio.

Reference screenshot:

Android_Studio

Create assets folder[edit | edit source]

  • Right click in MAIN folder > New > Folder > Assets Folder.
  • Assets folder will be under MAIN folder with the same symbol as RES folder.
  • In this example I put a font file. Android_Studio

Credit:Stack_Overflow_Documentation