Mobile Platform as a Service:Performance log

The performance logs that Mobile Analysis Service accesses to Android include:

• Startup time log

• Lag log

• Stuck log

You can Log in to the mPaaS console and choose Mobile Analysis Service > Basic analysis to view the startup duration; and log in to the mPaaS console and choose Mobile Analysis Service > Performance analysis to view lag and stuck reports.

Startup time tracking

Application startup time = the time when this method is called - the time when the application starts.

It is recommended to call the following method in the onCreate() method of the home page Activity to track the startup speed.

MPLogger.reportLaunchTime(Context context);

Lag tracking

A lag is defined as the Android main thread taking more than 2.25 seconds to complete a method. The lag threshold varies depending on the APK package type:

• When the APK package is a debug package, the lag threshold is 0.75 seconds, so that you can find the potential lagging issues during debugging.

• When the APK package is a release package, the lag threshold is 2.25 seconds.

Enable lag monitoring

Method 1

The interface needs to inherit the BaseActivity, BaseFragmentActivity or BaseAppCompatActivity class provided by mPaaS. All interfaces that inherit these classes will automatically monitor lag.

Method 2

Manually call the relevant interface in the life cycle method of Activity, for example:

import android.app.Activity;
import android.app.Application;
import android.os.Bundle;

import com.mpaas.mas.adapter.api.MPLogger;

public class MPLifecycle implements Application.ActivityLifecycleCallbacks {

    private int mVisibleActivityCount = 0;
    private boolean isBackground = false;

    @Override
    public void onActivityCreated(Activity activity, Bundle bundle) {

    }

    @Override
    public void onActivityStarted(Activity activity) {
        mVisibleActivityCount++;
        if (isBackground) {
            isBackground = false;
            // Call it when the application returns to the foreground
            MPLogger.monitorAppForeground();
        }
    }

    @Override
    public void onActivityResumed(Activity activity) {
        // Update Activity Context
        MPLogger.monitorActivityResumed(activity);
    }

    @Override
    public void onActivityPaused(Activity activity) {
    }

    @Override
    public void onActivityStopped(Activity activity) {
        mVisibleActivityCount--;
        if (mVisibleActivityCount <= 0) {
            isBackground = true;
            // Call it when the application returns to the background
            MPLogger.monitorAppBackground();
        }
    }

    @Override
    public void onActivitySaveInstanceState(Activity activity, Bundle bundle) {
    }

    @Override
    public void onActivityDestroyed(Activity activity) {
    }

}

When the APK is a debug package, the lag monitoring is full statistics; when the APK is a release package, the lag monitoring is sampling statistics with a sampling rate of 10%.

Stuck tracking

A stuck is ANR in the Android system, which usually means that the main thread is unresponsive for more than 5 seconds.

To enable stuck monitoring, please refer to the above article for details: Enable lag monitoring.