How to use Leak Canary

Question

I know this is probably a dumb question, but I am pretty new at developing android, and I currently experiencing an OutOfMemoryError in my apps, which I have tried to debug

Answer 1

I used Leak-Canary like below:

1) Gradle dependency:

debugImplementation 'com.squareup.leakcanary:leakcanary-android:1.4'

2) Application class:

   @Override
public void onCreate() {
    super.onCreate();
    if (BuildConfig.DEBUG) {
        StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
                .detectCustomSlowCalls()
                .detectNetwork()
                .penaltyLog()
                .penaltyDeath()
                .build());
        StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
                .detectActivityLeaks()
                .detectLeakedClosableObjects()
                .detectLeakedRegistrationObjects()
                .detectLeakedSqlLiteObjects()
                .penaltyLog()
                .penaltyDeath()
                .build());

        LeakLoggerService.setupLeakCanary(this);
    }
}

3) LeakLoggerService class: place this class in debug package created by gradle.

public class LeakLoggerService extends DisplayLeakService {

public static void setupLeakCanary(Application application) {
    if (LeakCanary.isInAnalyzerProcess(application)) {
        // This process is dedicated to LeakCanary for heap analysis.
        // You should not init your app in this process.
        return;
    }
    LeakCanary.install(application, LeakLoggerService.class,
            AndroidExcludedRefs.createAppDefaults().build());

}

@Override
protected void afterDefaultHandling(HeapDump heapDump, AnalysisResult result, String leakInfo) {
    if (!result.leakFound || result.excludedLeak) {
        return;
    }

    Log.w("LeakCanary", leakInfo);
}

4) Register service to manifest file and 1 permission:

5) Finally verify if setup is successful: Leak an activity ;)

public class Main2Activity extends AppCompatActivity {
static TextView label;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    label = new TextView(this);
    label.setText("asds");

    setContentView(label);
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 
}
}

kill this activity and check logs with tag : LeakCanary

It should work...