Yeluzi playing Android (2) using log to print information

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Article Directory

• foreword
• 1. log function
• 2. Function implementation
• Summarize

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foreword

This series is mainly used to record the relevant content of learning Android. This article learns how Android prints log information.

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1. log function

The log function in Android has five methods, as shown in the figure below, the log function has two parameters, tag: mainly used to filter the print information, generally use the class name of the class to be printed; msg: the specific content of the print information

2. Function implementation

Since all methods of the Log function need to pass in a tag parameter, declare a TAG constant outside the onCreate method, as shown in the figure below

The print results are as follows, and the red mark is the printed error information

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Summarize

This article mainly learns five methods of log printing logs, and how to view and print information on Android