Dalvik Debug Monitor Service
Dalvik Debug Monitor Services
Dalvik Debug Monitor Service In Android
Dalvik Debug Monitor Server Ddms

DDMS DDMS stands for Dalvik debug monitor server, that provide many services on the device. The service could include message formation, call spoofing, capturing screenshot, exploring internal threads and file systems e.t.c Running DDMS From Andro. Dalvik Debug Monitor Service (DDMS) provides port-forwarding services, screen capture on the device, thread and heap information on the device, logcat, process, and radio state information, incoming call and SMS spoofing, location data spoofing, and more. Dalvik Debug Monitoring Service: B. Dalvik Design Memory Service: C. Dalvik Debug Memory Service: D. Dalvik Design Monitoring Service: Q. Choose the correct option regarding Activity in Android. An activity is a window that contains the user interface of your application.

In this document

Use the System Log
Work with Breakpoints

See also

Android Studio enables you to debug apps running on the emulator or on an Android device.With Android Studio, you can:

Select a device to debug your app on.
View the system log.
Set breakpoints in your code.
Examine variables and evaluate expressions at run time.
Run the debugging tools from the Android SDK.
Capture screenshots and videos of your app.

You could go to Setup Administration Setup Monitoring and turn on the Debug Log for the Web To Lead user (aka the 'Default Lead Creator') and see if it shows anything bad, or you could try submitting a lead with that precise information in it to see if it violates a validation rule or something. Android ships a debugging tool, Dalvik Debug Monitor Service (DDMS). This tool provides additional services such as port-forwarding services, screen capture on device, incoming call and SMS spoofing etc. When DDMS starts, it connects to adb. A VM monitoring service is created between adb and DDMS, when a device is connected.

To debug your app, Android Studio builds a debuggable version of your app, connectsto a device or to the emulator, installs the app and runs it. The IDE shows the system logwhile your app is running and provides debugging tools to filter log messages, work withbreakpoints, and control the execution flow.

Run your App in Debug Mode

Figure 1. The Choose Device window enables you to select a physical Android device or a virtual device to debug your app.

To run your app in debug mode, you build an APK signed with a debug key and install it on aphysical Android device or on the Android emulator.To set up an Android device for development, see UsingHardware Devices. For more information about the emulator provided by the Android SDK, seeUsing the Emulator.

To debug your app in Android Studio:

Open your project in Android Studio.
Click Debug in the toolbar.
On the Choose Device window, select a hardware device from the list or choose a virtual device.
Click OK. Your app starts on the selected device.

Figure 1 shows the Choose Device window. The list shows all the Android devicesconnected to your computer. Select Launch Emulator to use an Android virtual deviceinstead. Click the ellipsis to open theAndroid Virtual Device Manager.

Android Studio opens the Debug tool window when you debug your app. To open theDebug window manually, click Debug.This window shows threads and variables in the Debugger tab, the device status in theConsole tab, and the system log in the Logcat tab. The Debug toolwindow also provides other debugging tools covered in the following sections.

Figure 2. The Debug tool window in Android Studio showingthe current thread and the object tree for a variable.

Use the System Log

The system log shows system messages while you debug your app. These messages includeinformation from apps running on the device. If you want to use thesystem log to debug your app, make sure your code writes log messages and prints the stacktrace for exceptions while your app is in the development phase.

Write log messages in your code

To write log messages in your code, use the Log class. Log messageshelp you understand the execution flow by collecting the system debug output while you interactwith your app. Log messages can tell you what part of your application failed. For moreinformation about logging, see Reading and Writing Logs.

The following example shows how you might add log messages to determine if previous stateinformation is available when your activity starts:

During development, your code can also catch exceptions and write the stack trace to the systemlog:

Note: Remove debug log messages and stack trace print calls fromyour code when you are ready to publish your app. You could do this by setting a DEBUGflag and placing debug log messages inside conditional statements.

View the system log

Both the Android DDMS (Dalvik Debug Monitor Server) and the Debug tool windowsshow the system log; however, the Android DDMS tool window lets you view only log messagesfor a particular process. To view the system log on the Android DDMS tool window:

Start your app as described in Run your App in Debug Mode.
Click Android to open the Android DDMS tool window.
If the system log is empty in the Logcat view, click Restart .

Figure 4. The system log in the Android DDMS toolwindow.

The Android DDMS tool window gives you access to some DDMS features from Android Studio.For more information about DDMS, see Using DDMS.

The system log shows messages from Android services and other Android apps. To filter the logmessages to view only the ones you are interested in, use the tools in the Android DDMSwindow:

To show only log messages for a particular process, select the process in the Devices view and then click Only Show Logcat from Selected Process . If the Devices view is not available, click Restore Devices View on the right of the Android DDMS tool window. This button is only visible when you hide the Devices window.
To filter log messages by log level, select a level under Log Level on the top of the Android DDMS window.
To show only log messages that contain a particular string, enter the string in the search box and press Enter.

Work with Breakpoints

Breakpoints enable you to pause the execution of your app at a particular line of code, examinevariables, evaluate expressions, and continue the execution line by line. Use breakpoints todetermine the causes of run-time errors that you can't fix by looking at your code only. To debugyour app using breakpoints:

Dalvik Debug Monitor Service

Open the source file in which you want to set a breakpoint.
Locate the line where you want to set a breakpoint and click on it.
Click on the yellow portion of the side bar to the left of this line, as shown in figure 5.
Start your app as described in Run your App in Debug Mode.

Android Studio pauses the execution of your app when it reaches the breakpoint. You can thenuse the tools in the Debug tool window to identify the cause of the error.

Figure 5. A red dot appears next to the line when you seta breakpoint.

View and configure breakpoints

To view all the breakpoints and configure breakpoint settings, click ViewBreakpoints on the left side of the Debug toolwindow. The Breakpoints window appears, as shown in figure 6.

Figure 6. The Breakpoints window lists all the currentbreakpoints and includes behavior settings for each.

The Breakpoints