Android DebugPort

Additional

Language
Java
Version
2.1.0 (Sep 26, 2017)
Created
Apr 25, 2016
Updated
Oct 16, 2017 (Retired)
Owner
Jason Feinstein (jasonwyatt)
Contributors
ligi
Adam McNeilly (AdamMc331)
Jason Feinstein (jasonwyatt)
3
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Blurb

Android DebugPort

Android DebugPort is a drop-in utility which allows you to write and execute code within your app's context, at runtime, and from the comfort of your computer's terminal. Think of it as a window into your application through which you can both inspect and modify its state.

You can connect to one of two REPL servers running within your app:

  • Debug REPL - Run java-like code and inspect/modify the state of your android application.
  • SQLite REPL - Execute queries against your app's SQLite databaases.

Getting Started - Drop-in

Configure Your Dependencies

Add the jitpack.io repository to your root build.gradle:

allprojects {
    repositories {
        jcenter()
        maven { url "https://jitpack.io" }
    }
}

In your application's build.gradle file, add a dependency for Android DebugPort:

debugCompile 'com.github.jasonwyatt.Android-DebugPort:lib:2.1.0'
releaseCompile 'com.github.jasonwyatt.Android-DebugPort:lib-noop:2.1.0'

Note: The final line above will use a no-op version of the DebugPort library in production builds. This makes it impossible for people to run the DebugPort server on a production build.

Run Your App

When you start your app after building for debug, you will see a low-priority notification in your system tray which will allow you to start the debugport servers.

Connecting to the Debug Server

$ telnet 192.168.2.83 8562 # on MacOS High Sierra: `nc 192.168.2.83 8562`
Trying 192.168.2.83...
Connected to 192.168.2.83.
Escape character is '^]'.

Android DebugPort v1.0
Report issues at https://github.com/jasonwyatt/Android-DebugPort/issues

BeanShell 2.0b6 - by Pat Niemeyer (pat@pat.net)
bsh %

There are a few built in commands, to see what they are, run help();

bsh % help();
Available Commands:
  Access:
      call(Object obj, String method, Object... params)
          Call a method, regardless of access modifiers, on the provided object.
      get(Object obj, String fieldName)
          Get the value of a field, regardless of access modifiers, on the provided object.
      set(Object obj, String fieldName, Object value)
          Set the value of a field on the provided object to the given value, regardless of access modifiers.

  Field Inspection:
      fields(Class class)
          List all of the fields available for a particular class.
      fields(Object obj)
          List all of the fields available for a particular object.
      fieldsLocal(Class class)
          List all of the fields defined locally for a particular class.
      fieldsLocal(Object obj)
          List all of the fields defined locally for an object.

  Method Inspection:
      methods(Class class)
          Get the available methods for the provided class.
      methods(Object obj)
          Get the available methods for the provided object.
      methodsLocal(Class class)
          Show all of the locally-declared methods for the provided class.
      methodsLocal(Object obj)
          Show all of the locally-declared methods for the provided object.

  Other:
      exit()
          Exit this interpreter.
      help()
          Show this help message.
      source(String scriptPath)
          Load and run a Beanshell script within your app's assets folder.

bsh %

Also, your application variable is automatically included as a global variable in the interpreter. It's called app. Try running methodsLocal(app);:

bsh % methodsLocal(app);
declared methods: {
  public void onCreate()
}
bsh %

Don't forget that you can execute whatever code you wish within the DebugPort. See the beanshell documentation for the full rundown.

You can exit at any time by running the exit(); command.

Connecting to the SQLite Server

$ telnet 192.168.0.100 8563 # on MacOS High Sierra: `nc 192.168.2.83 8563`
Trying 192.168.0.100...
Connected to 192.168.0.100.
Escape character is '^]'.

Android DebugPort v1.0
Report issues at https://github.com/jasonwyatt/Android-DebugPort/issues

SQLite Database REPL

sqlite>

As with the Debug server, there is a help command for the SQLite server:

sqlite> help;
Help:
  As you'd expect, you can execute any valid SQLite statements against the database to which you're
  currently connected (see: `USE [database name];` below).

  In addition to regular SQLite commands, Android DebugPort provides additional functionality via several
  additional commands.

  Available non-SQLite commands (case insensitive):
    Databases:
        CREATE DATABASE [database name];
            Create a new database called [database name].
        DROP DATABASE [database name];
            Drop the database named [database name] from the app's collection of databases.
        USE [database name];
            Connect to the database called [database name]. All SQL commands will be executed against
            this database until USE is called again.

    Inspection:
        SHOW CREATE TABLE [table name];
            Show the CREATE TABLE command used to create [table name].
        SHOW DATABASES;
            Show all available databases for the app, including temporary databases.
        SHOW TABLES;
            Show all of the tables defined for the database to which you are currently connected.

    Other:
        exit; or quit;
            Exit this interpreter.
        help;
            Show this help message.

sqlite>

Try running show databases; to see the available databases for your app:

sqlite> show databases;
+----------+
| Database |
+----------+
| blog     |
| projects |
+----------+

sqlite>

Run use [database name]; to connect to a database, and once you're connected, you can run any SQLite command you want. You can quit at any time by running the exit; command.

Advanced Configuration

You can configure Android-DebugPort by setting any of the following <meta-data> values in your Application's AndroidManifest.xml.

<application 
    name=".MyApplication"
    label="@string/app_name"
    >
    
    <!-- Customize the port on which the BeanShell REPL will be exposed. -->
    <meta-data android:name="jwf.debugport.METADATA_DEBUG_PORT" android:value="8000"/>
    <!-- Customize the port on which the SQLite REPL will be exposed. -->
    <meta-data android:name="jwf.debugport.METADATA_SQLITE_PORT" android:value="9000"/>
    <!-- Provide any startup commands for the BeanShell REPL by referencing a string array resource. -->
    <meta-data android:name="jwf.debugport.METADATA_STARTUP_COMMANDS" android:resource="@array/startup_commands"/>
    
    <!-- ... -->
</application>

Note: It is recommended that if you wish to supply these meta-data values, you should consider setting them within an AndroidManifest.xml file for the debug build variant.

License

This library is released under the Apache 2.0 License.