Android实现创意LoadingView动画效果

Android上的热火锅煮萝卜蔬菜的Loading动画效果。 这是一个锅煮萝卜的Loading动画，效果仿照自之前iOS上看到的一个效果，觉得挺有意思，就移植过来了，在此完成了Dialog的样式，方便使用者作为LoadingView去使用。
关键性代码：

package yellow5a5.demo.boilingloadingview.View;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ValueAnimator;
import android.content.Context;
import android.graphics.drawable.ClipDrawable;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import java.util.Timer;
import java.util.TimerTask;
import yellow5a5.demo.boilingloadingview.R;

public class BoilingPanView extends RelativeLayout {
  private View mView;
  private ClipDrawable mWaterDrawable;
  private WaterView mWaterView;
  private FlameView mFlameView;
  private View mPea1;
  private View mPea2;
  private ImageView mPotato;
  private ImageView mCarrot;
  private ImageView mCoverView;
  private Animation mLeftInAnim;
  private Animation mRightInAnim;
  private boolean isRightRotate = true;
  private ValueAnimator mCoverAnim;
  private BoilingAnimListener mBoilingAnimListener;
  public interface BoilingAnimListener {
    //初始动画结束监听
    void onFirstAnimEnd();
  }
  public void setBoilingAnimListener(BoilingAnimListener l) {
    this.mBoilingAnimListener = l;
  }
  private Handler mHandle = new Handler(new Handler.Callback() {
    @Override
    public boolean handleMessage(Message msg) {
      if (msg.what == 0X0000) {
        mWaterDrawable.setLevel(mWaterDrawable.getLevel() + 800);
      }
      return false;
    }
  });
  public BoilingPanView(Context context) {
    this(context, null);
  }
  public BoilingPanView(Context context, AttributeSet attrs) {
    this(context, attrs, 0);
  }
  public BoilingPanView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    mView = LayoutInflater.from(context).inflate(R.layout.boiling_pan, this, true);
    initView();
    initStartAnim();
    initCoverAnim();
  }
  private void initView() {
    mWaterView = (WaterView) mView.findViewById(R.id.img_water);
    mFlameView = (FlameView) mView.findViewById(R.id.flame);
    mCoverView = (ImageView) mView.findViewById(R.id.img_cover);
    mPea1 = mView.findViewById(R.id.img_pea1);
    mPea2 = mView.findViewById(R.id.img_pea2);
    mPotato = (ImageView) mView.findViewById(R.id.img_potato);
    mCarrot = (ImageView) mView.findViewById(R.id.img_carrot);
    mWaterDrawable = (ClipDrawable) mWaterView.getDrawable();
  }
  private void initStartAnim() {
    mLeftInAnim = AnimationUtils.loadAnimation(getContext(), R.anim.left_in_anim);
    mRightInAnim = AnimationUtils.loadAnimation(getContext(), R.anim.right_in_anim);
  }
  
  private void initCoverAnim() {
    mCoverAnim = ValueAnimator.ofFloat(0f, 1f, 0f).setDuration(800);
    mCoverAnim.setRepeatMode(Animation.REVERSE);
    mCoverAnim.setRepeatCount(-1);
    mCoverAnim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
      @Override
      public void onAnimationUpdate(ValueAnimator animation) {
        float value = (float) animation.getAnimatedValue();
        if (isRightRotate) {
          mCoverView.setRotation(value * 5);
        } else {
          mCoverView.setRotation(-value * 5);
        }
        mCoverView.setTranslationY(-value * TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 5, getResources().getDisplayMetrics()));
      }
    });
    mCoverAnim.addListener(new AnimatorListenerAdapter() {
      @Override
      public void onAnimationRepeat(Animator animation) {
        super.onAnimationRepeat(animation);
        isRightRotate = !isRightRotate;
      }
    });
  }
  
  public void beginFirstInAnim() {
    mPea1.setVisibility(VISIBLE);
    mPea2.setVisibility(VISIBLE);
    mPotato.setVisibility(VISIBLE);
    mCarrot.setVisibility(VISIBLE);
    mCoverView.setVisibility(VISIBLE);
    mPea1.startAnimation(mLeftInAnim);
    mPea2.startAnimation(mLeftInAnim);
    mPotato.startAnimation(mLeftInAnim);
    mCarrot.startAnimation(mRightInAnim);
    mCoverView.startAnimation(mRightInAnim);
    mRightInAnim.setAnimationListener(new Animation.AnimationListener() {
      @Override
      public void onAnimationStart(Animation animation) {
      }
      @Override
      public void onAnimationEnd(Animation animation) {
        if (mBoilingAnimListener != null) {
          //这里是为了给外部留有操作的空间
          mBoilingAnimListener.onFirstAnimEnd();
        } else {
          beginBoilingAnim();
        }
      }
      @Override
      public void onAnimationRepeat(Animation animation) {
      }
    });
  }
  
  public void beginBoilingAnim() {
    final Timer timer = new Timer();
    timer.schedule(new TimerTask() {
      @Override
      public void run() {
        mHandle.sendEmptyMessage(0X0000);
        if (mWaterDrawable.getLevel() >= 10000) {
          timer.cancel();
        }
      }
    }, 0, 50);
    mFlameView.startFlaming();
    mCoverAnim.start();
  }
  
  public void resetAnim() {
    mWaterDrawable.setLevel(0);
    mWaterView.resetBubbleAnim();
    mFlameView.stopFlaming();
    mPea1.setVisibility(INVISIBLE);
    mPea2.setVisibility(INVISIBLE);
    mPotato.setVisibility(INVISIBLE);
    mCarrot.setVisibility(INVISIBLE);
    mCoverView.setVisibility(INVISIBLE);
  }
}

希望本文所述对大家学习Android软件编程有所帮助。

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