How to output Android logs to a file?

2 years ago
Isabella Edwards
1 minute

In Android, you can output logs to a file using the following method:

  1. Document
  2. a person who writes documents and stories for a living
  3. writing data to a file
File logFile = new File(Environment.getExternalStorageDirectory(), "log.txt");
FileWriter writer = new FileWriter(logFile, true);
  1. Record
String log = "This is a log message.";
Log.d("TAG", log);
writer.append(log + "\n");
  1. Close the file writing stream. Remember to close the file writing stream when the application exits or no longer needs to write logs.
writer.close();

Please note that in order to output logs to a file, you need to add the following permission in the AndroidManifest.xml file of your application:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Additionally, in order to prevent permission issues on Android 10 and higher versions, you also need to use FileProvider to get file URI and properly configure file access permissions.

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