Android Studio reduce memory usage of PC

public class MainClass extends Activity {
   
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        TableLayout tl = (TableLayout)findViewById(R.id.tableLayout1);
        TableRow row = new TableRow(this);
        TextView tv = new TextView(this);
        tv.setText("This is text");

        tl.addView(row);
        row.addView(tv);

    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="//schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TableLayout android:layout_width="fill_parent" 
    android:id="@+id/tableLayout1" android:layout_height="wrap_content">
</TableLayout>
</LinearLayout>

		// Error
                String s = null;
		Log.e("bla", s); // !!! error Log.e println needs a message error.
                // OK
		String s = null;
		Log.e("bla", s+""); // OK