Android Studio

Filter logs from UI

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

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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

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Create filters configuration

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

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

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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

Custom colors of logcat message based on message importance

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

Change the colors as you need:

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Choose the appropriate color:

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Enable/Disable blank line copy

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

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Clicking on Registry you will get

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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

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>

ActionShortcut
Format codeCTRL + ALT + L
Add unimplemented methodsCTRL + I
Show logcatALT + 6
BuildCTRL + F9
Build and RunCTRL + F10
FindCTRL + F
Find in projectCTRL+SHIFT + F
Find and replaceCTRL + R
Find and replace in projectCTRL + SHIFT + R
Override methodsCTRL + O
Show projectALT + 1
Hide project - logcatSHIFT + ESC
Collapse allCTRL + SHIFT + NumPad +
View Debug PointsCTRL + SHIFT + F8
Expand allCTRL + SHIFT + NumPad -
Open SettingsALT + s
Select Target (open current file in Project view)ALT + F1ENTER
Search EverywhereSHIFTSHIFT (Double shift)
Code | Surround WithCTRLALT + T
Create method form selected codeALT + CTRL

Refactor:

ActionShortcut
Refactor This (menu/picker for all applicable refactor actions of the current element)Mac CTRL + T - Win/Linux CTRL + ALT + T
RenameSHIFT + F6
Extract MethodMac CMD + ALT + M - Win/Linux CTRL + ALT + M
Extract ParameterMac CMD + ALT + P - Win/Linux CTRL + ALT + P
Extract VariableMac CMD + ALT + V - Win/Linux CTRL + ALT + V

Android Studio Improve performance tip

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

Setup Android Studio

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

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

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Gradle build project takes forever

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

Reference screenshot:

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Create assets folder

  • 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.