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// fragment = nested sub-activity w/ its own layout and lifecycle. (modular section of an activity)
// fragment receives the same lifecycle callbacks as its parent activity does
public class ArticleFragment extends Fragment {
  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    return inflater.inflate(R.layout.article_view, container, false);
  }
}

dnkm

<!-- Declaring the main "launcher" activity -->
<activity android:name=".MainActivity" android:label="@string/app_name">
  <intent-filter>
    <action android:name="android.intent.action.MAIN" />
    <category android:name="android.intent.category.LAUNCHER" />
  </intent-filter>
</activity>

dnkm

// enables the "app icon" as the up button
// make sure to declare parent activity in the manifest
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_sample);
    
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    // if minSdkVersion >= 11, use this instead:
    // getActionBar().setDisplayHomeAsUpEnabled(true);

dnkm

protected void onCreate(...) {
  super.onCreate(savedInstanceState);

  TextView tv = new TextView(this);
  tv.setTextSize(40);
  tv.setText("blah");
  
  setContentView(tv); // adds tv as the root view of the activity's layout
}

dnkm

// constant movement
void Update() {
    transform.position = Vector3.Lerp(pos1.position, pos2.position, speed * timer);
    
    if (destination == pos1) {
        timer = Mathf.Clamp(timer = Time.deltaTime, 0.0f, 1.0f/speed);
    } else {
        timer = Mathf.Clamp(timer + Time.deltaTime, 0.0f, 1.0f/speed);
    }
}

dnkm

using UnityEngine;
using System.Collections;

[ExecuteInEditMode]
public class SnapToGrid : MonoBehaviour {

    public float cell_size = 1f; // = larghezza/altezza delle celle
    private float x, y, z;

    void Start() {

dnkm

using UnityEngine;
using System.Collections;

public class Gizmo : MonoBehaviour {
    public bool ShowMainCameraBorder;

    void OnDrawGizmos() {
        if (ShowMainCameraBorder) {
            float z = GetComponent<Camera>().nearClipPlane;
            Vector3 max = GetComponent<Camera>().ViewportToWorldPoint(new Vector3(1, 1, z));