在onTouchEvent期间如何获取logcat日志？

Question

I have found I cannot get logcat logs during onTouchEvent. On the other hand, I could do it at least six months ago. This is what I've done and I got the result logs.

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}

@Override
public boolean onTouchEvent(MotionEvent motionEvent) {

    switch (motionEvent.getAction()) {
        case MotionEvent.ACTION_DOWN:
            Log.d("", "ACTION_DOWN");
            Log.d("", "EventLocation X:" + motionEvent.getX() + ",Y:" + motionEvent.getY());
            break;
        case MotionEvent.ACTION_UP:
            Log.d("", "ACTION_UP");
            long eventDuration2 = motionEvent.getEventTime() - motionEvent.getDownTime();
            Log.d("", "eventDuration2: " +eventDuration2+" msec");
            Log.d("", "Pressure: " + motionEvent.getPressure());

            break;
        case MotionEvent.ACTION_MOVE:
            Log.d("", "ACTION_MOVE");
            break;
        case MotionEvent.ACTION_CANCEL:
            Log.d("", "ACTION_CANCEL");
            break;
    }

    return false;
}

}

Then, I got logs as follows:

14:58:25.693  ....testtouchevent D/ ACTION_DOWN
14:58:25.693  ....testtouchevent D/ EventLocation X:196.18164,Y:464.0
14:58:25.723  ....testtouchevent D/ ACTION_MOVE
14:58:25.733  ....testtouchevent D/ ACTION_MOVE
14:58:25.753  ....testtouchevent D/ ACTION_MOVE
14:58:25.813  ....testtouchevent D/ ACTION_UP
14:58:25.813  ....testtouchevent D/ eventDuration2: 118 msec
14:58:25.813  ....testtouchevent D/ Pressure: 0.38823533

I think Android 6.0 or Android Studio1.4 stopped that. Is it one of the changes of Android 6.0?

In fact, it is possible to set TextView message in stead of Log.d, but that way is not so good. Anyhow I want to know the reason.

ScreenShot: When I add a Log.d in the onCreate(), a log comes up.

Answer 1

Android SDK provides a deafult class LogView http://developer.android.com/samples/BasicContactables/src/com.example.android.common.logger/LogView.html which you can use as a view in your application while development.

Alternatively take look at

https://github.com/jgilfelt/GhostLog

https://play.google.com/store/apps/details?id=org.jtb.alogcat

https://play.google.com/store/apps/details?id=com.nolanlawson.logcat

https://github.com/googlesamples/android-BeamLargeFiles/blob/master/Application/src/main/java/com/example/android/common/logger/LogView.java