Android實現中軸旋轉特效Android制作別樣的圖片瀏覽器

/** 
 * An animation that rotates the view on the Y axis between two specified angles. 
 * This animation also adds a translation on the Z axis (depth) to improve the effect. 
 */ 
public class Rotate3dAnimation extends Animation { 
 private final float mFromDegrees; 
 private final float mToDegrees; 
 private final float mCenterX; 
 private final float mCenterY; 
 private final float mDepthZ; 
 private final boolean mReverse; 
 private Camera mCamera; 
 
 /** 
  * Creates a new 3D rotation on the Y axis. The rotation is defined by its 
  * start angle and its end angle. Both angles are in degrees. The rotation 
  * is performed around a center point on the 2D space, definied by a pair 
  * of X and Y coordinates, called centerX and centerY. When the animation 
  * starts, a translation on the Z axis (depth) is performed. The length 
  * of the translation can be specified, as well as whether the translation 
  * should be reversed in time. 
  * 
  * @param fromDegrees the start angle of the 3D rotation 
  * @param toDegrees the end angle of the 3D rotation 
  * @param centerX the X center of the 3D rotation 
  * @param centerY the Y center of the 3D rotation 
  * @param reverse true if the translation should be reversed, false otherwise 
  */ 
 public Rotate3dAnimation(float fromDegrees, float toDegrees, 
   float centerX, float centerY, float depthZ, boolean reverse) { 
  mFromDegrees = fromDegrees; 
  mToDegrees = toDegrees; 
  mCenterX = centerX; 
  mCenterY = centerY; 
  mDepthZ = depthZ; 
  mReverse = reverse; 
 } 
 
 @Override 
 public void initialize(int width, int height, int parentWidth, int parentHeight) { 
  super.initialize(width, height, parentWidth, parentHeight); 
  mCamera = new Camera(); 
 } 
 
 @Override 
 protected void applyTransformation(float interpolatedTime, Transformation t) { 
  final float fromDegrees = mFromDegrees; 
  float degrees = fromDegrees + ((mToDegrees - fromDegrees) * interpolatedTime); 
 
  final float centerX = mCenterX; 
  final float centerY = mCenterY; 
  final Camera camera = mCamera; 
 
  final Matrix matrix = t.getMatrix(); 
 
  camera.save(); 
  if (mReverse) { 
   camera.translate(0.0f, 0.0f, mDepthZ * interpolatedTime); 
  } else { 
   camera.translate(0.0f, 0.0f, mDepthZ * (1.0f - interpolatedTime)); 
  } 
  camera.rotateY(degrees); 
  camera.getMatrix(matrix); 
  camera.restore(); 
 
  matrix.preTranslate(-centerX, -centerY); 
  matrix.postTranslate(centerX, centerY); 
 } 
} 

public class Picture { 
 
 /** 
  * 圖片名稱 
  */ 
 private String name; 
 
 /** 
  * 圖片對象的資源 
  */ 
 private int resource; 
 
 public Picture(String name, int resource) { 
  this.name = name; 
  this.resource = resource; 
 } 
 
 public String getName() { 
  return name; 
 } 
 
 public int getResource() { 
  return resource; 
 } 
 
} 

public class PictureAdapter extends ArrayAdapter<Picture> { 
 
 public PictureAdapter(Context context, int textViewResourceId, List<Picture> objects) { 
  super(context, textViewResourceId, objects); 
 } 
 
 @Override 
 public View getView(int position, View convertView, ViewGroup parent) { 
  Picture picture = getItem(position); 
  View view; 
  if (convertView == null) { 
   view = LayoutInflater.from(getContext()).inflate(android.R.layout.simple_list_item_1, 
     null); 
  } else { 
   view = convertView; 
  } 
  TextView text1 = (TextView) view.findViewById(android.R.id.text1); 
  text1.setText(picture.getName()); 
  return view; 
 } 
 
} 

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
 android:id="@+id/layout" 
 android:layout_width="match_parent" 
 android:layout_height="match_parent" 
  > 
 
 <ListView 
  android:id="@+id/pic_list_view" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" 
  > 
 </ListView> 
  
 <ImageView 
  android:id="@+id/picture" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" 
  android:scaleType="fitCenter" 
  android:clickable="true" 
  android:visibility="gone" 
  /> 
 
</RelativeLayout>

public class MainActivity extends Activity { 
 
 /** 
  * 根布局 
  */ 
 private RelativeLayout layout; 
 
 /** 
  * 用于展示圖片列表的ListView 
  */ 
 private ListView picListView; 
 
 /** 
  * 用于展示圖片詳細的ImageView 
  */ 
 private ImageView picture; 
 
 /** 
  * 圖片列表的適配器 
  */ 
 private PictureAdapter adapter; 
 
 /** 
  * 存放所有圖片的集合 
  */ 
 private List<Picture> picList = new ArrayList<Picture>(); 
 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  requestWindowFeature(Window.FEATURE_NO_TITLE); 
  setContentView(R.layout.activity_main); 
  // 對圖片列表數據進行初始化操作 
  initPics(); 
  layout = (RelativeLayout) findViewById(R.id.layout); 
  picListView = (ListView) findViewById(R.id.pic_list_view); 
  picture = (ImageView) findViewById(R.id.picture); 
  adapter = new PictureAdapter(this, 0, picList); 
  picListView.setAdapter(adapter); 
  picListView.setOnItemClickListener(new OnItemClickListener() { 
   @Override 
   public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
    // 當點擊某一子項時，將ImageView中的圖片設置為相應的資源 
    picture.setImageResource(picList.get(position).getResource()); 
    // 獲取布局的中心點位置，作為旋轉的中心點 
    float centerX = layout.getWidth() / 2f; 
    float centerY = layout.getHeight() / 2f; 
    // 構建3D旋轉動畫對象，旋轉角度為0到90度，這使得ListView將會從可見變?yōu)椴豢梢?
    final Rotate3dAnimation rotation = new Rotate3dAnimation(0, 90, centerX, centerY, 
      310.0f, true); 
    // 動畫持續(xù)時間500毫秒 
    rotation.setDuration(500); 
    // 動畫完成后保持完成的狀態(tài) 
    rotation.setFillAfter(true); 
    rotation.setInterpolator(new AccelerateInterpolator()); 
    // 設置動畫的監(jiān)聽器 
    rotation.setAnimationListener(new TurnToImageView()); 
    layout.startAnimation(rotation); 
   } 
  }); 
  picture.setOnClickListener(new OnClickListener() { 
   @Override 
   public void onClick(View v) { 
    // 獲取布局的中心點位置，作為旋轉的中心點 
    float centerX = layout.getWidth() / 2f; 
    float centerY = layout.getHeight() / 2f; 
    // 構建3D旋轉動畫對象，旋轉角度為360到270度，這使得ImageView將會從可見變?yōu)椴豢梢?，并且旋轉的方向是相反的 
    final Rotate3dAnimation rotation = new Rotate3dAnimation(360, 270, centerX, 
      centerY, 310.0f, true); 
    // 動畫持續(xù)時間500毫秒 
    rotation.setDuration(500); 
    // 動畫完成后保持完成的狀態(tài) 
    rotation.setFillAfter(true); 
    rotation.setInterpolator(new AccelerateInterpolator()); 
    // 設置動畫的監(jiān)聽器 
    rotation.setAnimationListener(new TurnToListView()); 
    layout.startAnimation(rotation); 
   } 
  }); 
 } 
 
 /** 
  * 初始化圖片列表數據。 
  */ 
 private void initPics() { 
  Picture bird = new Picture("Bird", R.drawable.bird); 
  picList.add(bird); 
  Picture winter = new Picture("Winter", R.drawable.winter); 
  picList.add(winter); 
  Picture autumn = new Picture("Autumn", R.drawable.autumn); 
  picList.add(autumn); 
  Picture greatWall = new Picture("Great Wall", R.drawable.great_wall); 
  picList.add(greatWall); 
  Picture waterFall = new Picture("Water Fall", R.drawable.water_fall); 
  picList.add(waterFall); 
 } 
 
 /** 
  * 注冊在ListView點擊動畫中的動畫監(jiān)聽器，用于完成ListView的后續(xù)動畫。 
  * 
  * @author guolin 
  */ 
 class TurnToImageView implements AnimationListener { 
 
  @Override 
  public void onAnimationStart(Animation animation) { 
  } 
 
  /** 
   * 當ListView的動畫完成后，還需要再啟動ImageView的動畫，讓ImageView從不可見變?yōu)榭梢?
   */ 
  @Override 
  public void onAnimationEnd(Animation animation) { 
   // 獲取布局的中心點位置，作為旋轉的中心點 
   float centerX = layout.getWidth() / 2f; 
   float centerY = layout.getHeight() / 2f; 
   // 將ListView隱藏 
   picListView.setVisibility(View.GONE); 
   // 將ImageView顯示 
   picture.setVisibility(View.VISIBLE); 
   picture.requestFocus(); 
   // 構建3D旋轉動畫對象，旋轉角度為270到360度，這使得ImageView將會從不可見變?yōu)榭梢?
   final Rotate3dAnimation rotation = new Rotate3dAnimation(270, 360, centerX, centerY, 
     310.0f, false); 
   // 動畫持續(xù)時間500毫秒 
   rotation.setDuration(500); 
   // 動畫完成后保持完成的狀態(tài) 
   rotation.setFillAfter(true); 
   rotation.setInterpolator(new AccelerateInterpolator()); 
   layout.startAnimation(rotation); 
  } 
 
  @Override 
  public void onAnimationRepeat(Animation animation) { 
  } 
 
 } 
 
 /** 
  * 注冊在ImageView點擊動畫中的動畫監(jiān)聽器，用于完成ImageView的后續(xù)動畫。 
  * 
  * @author guolin 
  */ 
 class TurnToListView implements AnimationListener { 
 
  @Override 
  public void onAnimationStart(Animation animation) { 
  } 
 
  /** 
   * 當ImageView的動畫完成后，還需要再啟動ListView的動畫，讓ListView從不可見變?yōu)榭梢?
   */ 
  @Override 
  public void onAnimationEnd(Animation animation) { 
   // 獲取布局的中心點位置，作為旋轉的中心點 
   float centerX = layout.getWidth() / 2f; 
   float centerY = layout.getHeight() / 2f; 
   // 將ImageView隱藏 
   picture.setVisibility(View.GONE); 
   // 將ListView顯示 
   picListView.setVisibility(View.VISIBLE); 
   picListView.requestFocus(); 
   // 構建3D旋轉動畫對象，旋轉角度為90到0度，這使得ListView將會從不可見變?yōu)榭梢?，從而回到原點 
   final Rotate3dAnimation rotation = new Rotate3dAnimation(90, 0, centerX, centerY, 
     310.0f, false); 
   // 動畫持續(xù)時間500毫秒 
   rotation.setDuration(500); 
   // 動畫完成后保持完成的狀態(tài) 
   rotation.setFillAfter(true); 
   rotation.setInterpolator(new AccelerateInterpolator()); 
   layout.startAnimation(rotation); 
  } 
 
  @Override 
  public void onAnimationRepeat(Animation animation) { 
  } 
 
 } 
 
}