package com.example.textviewtest; 
 
import android.graphics.Camera; 
import android.graphics.Matrix; 
import android.view.animation.Animation; 
import android.view.animation.Transformation; 
 
public class Rotate3dAnimation extends Animation { 
  // 開(kāi)始角度 
  private final float mFromDegrees; 
  // 結(jié)束角度 
  private final float mToDegrees; 
  // 中心點(diǎn) 
  private final float mCenterX; 
  private final float mCenterY; 
  private final float mDepthZ; 
  // 是否需要扭曲 
  private final boolean mReverse; 
  // 攝像頭 
  private Camera mCamera; 
 
  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(); 
  } 
 
  // 生成Transformation 
  @Override 
  protected void applyTransformation(float interpolatedTime, Transformation t) { 
    final float fromDegrees = mFromDegrees; 
    // 生成中間角度 
    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); 
    // 取得變換后的矩陣 
    camera.getMatrix(matrix); 
    camera.restore(); 
 
    matrix.preTranslate(-centerX, -centerY); 
    matrix.postTranslate(centerX, centerY); 
  } 
} 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  xmlns:tools="http://schemas.android.com/tools" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" 
  android:background="@drawable/main_screen_bg" 
  android:gravity="center_horizontal" 
  android:orientation="vertical" 
  tools:context=".MainActivity" > 
 
  <Button 
    android:id="@+id/next_btn" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_marginTop="20dip" 
    android:drawableTop="@drawable/qiangpiao_dropdown" 
    android:text="下一個(gè)" /> 
 
  <TextView 
    android:id="@+id/tv" 
    android:layout_width="300dip" 
    android:layout_height="300dip" 
    android:layout_gravity="center" 
    android:background="@drawable/call_show_frame_safe" 
    android:gravity="center" 
    android:textColor="#ffffff" 
    android:textSize="15sp" /> 
 
</LinearLayout> 

package com.example.textviewtest; 
 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.View; 
import android.view.animation.AccelerateInterpolator; 
import android.view.animation.Animation; 
import android.view.animation.DecelerateInterpolator; 
import android.widget.Button; 
import android.widget.TextView; 
 
public class MainActivity extends Activity { 
  private TextView tv; 
  private Button btn; 
  private int count = 1; 
 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    tv = (TextView) findViewById(R.id.tv); 
    tv.setText(String.valueOf(count)); 
    btn = (Button) findViewById(R.id.next_btn); 
    applyRotation(0, 90); 
 
    btn.setOnClickListener(new View.OnClickListener() { 
 
      @Override 
      public void onClick(View v) { 
        applyRotation(0, 90); 
      } 
    }); 
 
  } 
 
  private void applyRotation(float start, float end) { 
    // 計(jì)算中心點(diǎn) 
    final float centerX = tv.getWidth() / 2.0f; 
    final float centerY = tv.getHeight() / 2.0f; 
 
    final Rotate3dAnimation rotation = new Rotate3dAnimation(start, end, 
        centerX, centerY, 310.0f, true); 
    rotation.setDuration(500); 
    rotation.setFillAfter(true); 
    rotation.setInterpolator(new AccelerateInterpolator()); 
    // 設(shè)置監(jiān)聽(tīng) 
    rotation.setAnimationListener(new DisplayNextView()); 
 
    tv.startAnimation(rotation); 
  } 
 
  private final class DisplayNextView implements Animation.AnimationListener { 
 
    public void onAnimationStart(Animation animation) { 
    } 
 
    // 動(dòng)畫結(jié)束 
    public void onAnimationEnd(Animation animation) { 
      tv.post(new SwapViews()); 
    } 
 
    public void onAnimationRepeat(Animation animation) { 
    } 
  } 
 
  private final class SwapViews implements Runnable { 
 
    public void run() { 
      final float centerX = tv.getWidth() / 2.0f; 
      final float centerY = tv.getHeight() / 2.0f; 
      Rotate3dAnimation rotation = null; 
 
      tv.requestFocus(); 
 
      rotation = new Rotate3dAnimation(90, 0, centerX, centerY, 310.0f, 
          false); 
      rotation.setDuration(500); 
      rotation.setFillAfter(true); 
      rotation.setInterpolator(new DecelerateInterpolator()); 
      // 開(kāi)始動(dòng)畫 
      tv.startAnimation(rotation); 
      tv.setText(String.valueOf(count++)); 
    } 
  } 
 
  @Override 
  public boolean onCreateOptionsMenu(Menu menu) { 
    getMenuInflater().inflate(R.menu.activity_main, menu); 
    return true; 
  } 
 
}