Tonnie-Dev

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        colorClass = new ColorClass();
        factClass = new FactClass();
        layout = findViewById(R.id.relativeLayout);
        txt = findViewById(R.id.textFact);
        btn = findViewById(R.id.btn);

Tonnie-Dev

buildTypes {
    release {
        postprocessing {
            removeUnusedCode true
            removeUnusedResources true
            obfuscate true
            optimizeCode true
            proguardFile 'proguard-rules.pro'
        }
    }

Tonnie-Dev

-assumenosideeffects class android.util.Log{
public static boolean isLoggable(java.lang.String, int);
public static int v(...);
public static int i(...);
public static int w(...);
public static int d(...);
public static int e(...);
}

Tonnie-Dev

 /*provide context if MyActivity is a local activity*/
        Intent intent = new Intent(context,MyActivity.class);
        startActivity(intent);

Tonnie-Dev

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        /*this references to the activity's class*/
        String [] animal = this.getResources().getStringArray(R.array.animals);
    }
}

Tonnie-Dev

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

        /*getting a notification service*/
        NotificationManager notificationManager = (NotificationManager) getSystemService(Context
                .NOTIFICATION_SERVICE);
    }

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File file = new File(context.getFilesDir(), filename);

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  /*creating a dynamic textview*/
        TextView textView = new TextView(MainActivity.this);

Tonnie-Dev

/*inflating xml layout*/
        LayoutInflater layoutInflater = LayoutInflater.from(MainActivity.this);
        layoutInflater.inflate(R.layout.activity_main,parent, false);

Tonnie-Dev

 /*sending local broadcast*/
        Intent broadcastIntent = new Intent("custom-intent");
        LocalBroadcastManager.getInstance(context).sendBroadcast(broadcastIntent);