To debug line by line in Android Studio, you can use breakpoints and the debugger tools built into the IDE.
Steps to debug line by line:
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Open your project in Android Studio.
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Click on the left margin beside a line number to add a breakpoint (red dot).
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Run the app in Debug mode using the bug icon instead of the normal Run button.
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When execution reaches the breakpoint, the app pauses automatically.
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Use debugger controls:
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Step Over → Executes the current line and moves to the next line
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Step Into → Goes inside a method/function
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Step Out → Exits the current method
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Resume Program → Continues execution until the next breakpoint
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You can also inspect variables, watch values change, and evaluate expressions while debugging. Line-by-line debugging is very useful for finding logic errors, crashes, and unexpected behavior in Android apps.
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