The best practice of using the Timber framework in the Java class library
The best practice of using the Timber framework in the Java class library
Timber is a commonly used Android log library that provides a simplified log printing method and integrates label and call stack information.Using the Timber framework in the Java library can help us better manage log output and improve the readability and debug ability of code.
1. Add dependencies
To use the Timber framework in the Java class library, you need to add related dependencies to the project's Build.gradle file:
groovy
dependencies {
implementation 'com.jakewharton.timber:timber:4.7.1'
}
2. Initialize timber
Perform the initialization of Timber at the entrance of the Java library (such as the onCreate method of the Application class):
import timber.log.Timber;
public class MyApp extends Application {
@Override
public void onCreate() {
super.onCreate();
Timber.plant(new Timber.DebugTree());
}
}
Use the `timber.debugtree ()` to initialize it. It prints the log into the logcat to facilitate us to debug.In the release version, you can use the `timber.releasetree () or custom TREE to achieve different log output strategies.
3. Print log
In the code of the Java library, you can use Timber to print the log.Timber provides various methods of printing logs, including `d (),` i (), `w (),` e (), etc., corresponding to different log level printing.
import timber.log.Timber;
public class MyClass {
public void myMethod() {
Timber.d ("this is a depbug log."); // Print the log -level log
Timber.i ("this is an info log."); // Print the log -level log
Timber.w ("this is a warning log."); // Print the log of warning level
Timber.e ("this is an error log."); // Print the log -level log
}
}
4. Custom Timber.tree
In addition to using the default `timber.debugtree ()`, we can also customize timber.tree according to actual needs to achieve specific log output strategies.For example, we can define a TREE who writes the log into the file:
import android.util.Log;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import timber.log.Timber;
public class FileLoggingTree extends Timber.Tree {
private static final String LOG_FILE_NAME = "app_log.txt";
@Override
protected void log(int priority, String tag, String message, Throwable t) {
try {
File logFile = new File(Environment.getExternalStorageDirectory() + File.separator + LOG_FILE_NAME);
BufferedWriter writer = new BufferedWriter(new FileWriter(logFile, true));
writer.write(tag + ": " + message);
writer.newLine();
writer.close();
} catch (IOException e) {
Log.e("FileLoggingTree", "Error writing log file", e);
}
}
}
Then use the custom TREE when initialized Timber:
Timber.plant(new FileLoggingTree());
In this way, we can output the log into the file so that we can check the log without connecting to the computer.
In summary, using the Timber framework can effectively simplify the log management work in the Java class library.By adding dependencies, initialization Timber, printing logs, and custom Timber.tree, we can easily manage and output logs to improve the readability and debug ability of code.
