CODEWITHSUNDEEP
androidlogging
G. Blake Meike
G. Blake Meike

Reputation: 6705

Missing logcat messages

I have two classes, A1 and A2. Both inherit from BaseActivity, which, in turn, inherits from AppCompatActivity.

BaseActivity has a boatload of logging statements that track, e.g., activity lifecycle methods. Like this: Log.d(tag, "in onCreate");

Those messages are logged, as expected, from A1 but not from A2! I've tried monitoring logcat both from AS and from command line. I can repeat the problem on several Android emulators and in a couple of dev environments.

If I simply replace, e.g., Log.d(tag, "in onCreate") with System.out.println(tag + ": in onCreate"), all of the expected messages appear.

Totally mystified, at this point. Anybody got any suggestions about where my log messages are going?

Edited to add:

I have replaced all calls to Log.d with calls to the following method:

private void log(String message) {
    Log.d("LOGGER", tag);
    Log.d(tag, message);
    System.out.println(tag + ": " + message);
}

Here is sample output from the two subclasses:

07-09 10:26:42.036 9657-9657/net.callmeike.android.latest D/LOGGER: A1
07-09 10:26:42.036 9657-9657/net.callmeike.android.latest D/A1: in onCreate
07-09 10:26:42.036 9657-9657/net.callmeike.android.latest I/System.out: A1: in onCreate

07-09 10:27:10.837 9657-9657/net.callmeike.android.latest D/LOGGER: A2
07-09 10:27:10.837 9657-9657/net.callmeike.android.latest I/System.out: A2: in onCreate

It appears that the variable tag is, in fact, the thing that drives the issue. Anybody understand why?

FWIW:

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="false"
    android:theme="@style/AppTheme"
    >
    <activity
        android:name=".A1"
        android:label="@string/a1_name"
        android:theme="@style/AppTheme.NoActionBar"
        >
    </activity>

    <activity
        android:name=".A2"
        android:label="@string/a2_name"
        android:theme="@style/AppTheme.NoActionBar"
        >

        <intent-filter>
            <action android:name="android.intent.action.MAIN"/>
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
    </activity>
</application>

EDITED to add: Sources for the three Activity-related classes:

public abstract class BaseActivity extends AppCompatActivity {
    private final String tag;
    private final int layout;

    public BaseActivity(String tag, int layout) {
        this.tag = tag;
        this.layout = layout;
    }

    protected abstract void test();

    @Override
    protected final void onCreate(Bundle savedInstanceState) {
        Log.d(tag, "in onCreate");
        super.onCreate(savedInstanceState);
        setContentView(layout);

        setSupportActionBar(findViewById(R.id.toolbar));

        findViewById(R.id.fab).setOnClickListener(this::makeSnackbar);
    }

    final void makeSnackbar(View v) {
        Snackbar.make(v, R.string.action_test, Snackbar.LENGTH_LONG)
            .setAction(R.string.action_test, v1 -> test())
            .show();
    }

    // blah blah blah
}

// BaseActivity logs show up in logcat
public class A1 extends BaseActivity {
    private static final String TAG = "A1";

    public A1() {
        super(TAG, R.layout.activity_a1);
    }

    @Override
    protected void test() {
        // blah blah blah
    }
}

// BaseActivity logs do not show up in logcat
public class A2 extends BaseActivity {
    private static final String TAG = "A2";

    public A2() {
        super(TAG, R.layout.activity_a2);
    }

    @Override
    protected void test() {
        // blah blah blah
    }
}

Upvotes: 1

Views: 2009

Answers (1)

TDG
TDG

Reputation: 6171

I've had a similar issue - some of my log messages were not shown by the Log command.
I've found out that there are some "illegal" tags that the logcat won't show.
In my case it was "SMS" tag. Try to change the bad tags with other ones.
You can take a look here - LogCat won't show my logs.
I've searched the documentation, but could not find any list of "illegal" tags.

Upvotes: 5

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