android属性动画 —— ValueAnimator和ObjectAnimator的例子

package com.manoel.animator;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.ViewGroup.MarginLayoutParams;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.widget.Button;

import com.nineoldandroids.animation.Animator;
import com.nineoldandroids.animation.Animator.AnimatorListener;
import com.nineoldandroids.animation.AnimatorInflater;
import com.nineoldandroids.animation.AnimatorSet;
import com.nineoldandroids.animation.IntEvaluator;
import com.nineoldandroids.animation.ObjectAnimator;
import com.nineoldandroids.animation.ValueAnimator;
import com.nineoldandroids.animation.ValueAnimator.AnimatorUpdateListener;

public class MainActivity extends ActionBarActivity {
    private static final String TAG = MainActivity.class.getSimpleName();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment()).commit();
        }
    }

    public class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_main, container,
                    false);

            init(rootView);

            return rootView;
        }

        private void init(View root) {
            Button mButton = (Button) root.findViewById(R.id.btn);

            // mButton.animate().setDuration(2000).scaleX(2).scaleY(2);

            mButton.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    performOnClick3(v);
                }
            });
        }
    }

    public class ViewWrapper {
        private View view;

        public ViewWrapper(View view) {
            this.view = view;
        }

        public void setMarginLeft(int marginLeft) {
            MarginLayoutParams marginLayoutParams = (MarginLayoutParams) view
                    .getLayoutParams();
            marginLayoutParams.leftMargin = marginLeft;
            view.setLayoutParams(marginLayoutParams);
        }

        public int getMarginLeft() {
            MarginLayoutParams marginLayoutParams = (MarginLayoutParams) view
                    .getLayoutParams();
            return marginLayoutParams.leftMargin;
        }
    }

    // 从xml里面加载
    private static AnimatorSet set;

    public void performOnClick3(View view) {
        if (set == null) {
            ViewWrapper warpper = new ViewWrapper(view);
            set = (AnimatorSet) AnimatorInflater.loadAnimator(getBaseContext(),
                    R.animator.my_animator);
            set.setTarget(warpper);
        }
        if (!set.isStarted()) {
            set.start();
        } else {
            set.cancel();
        }
    }

    private static ObjectAnimator objectAnimator;

    public void performOnClick2(View view) {
        ViewWrapper warpper = new ViewWrapper(view);
        if (objectAnimator == null) {
            objectAnimator = objectAnimator
                    .ofInt(warpper, "marginLeft", 0, 300);
            objectAnimator
                    .setInterpolator(new AccelerateDecelerateInterpolator());
            objectAnimator.setDuration(2000);
            objectAnimator.setRepeatCount(ValueAnimator.INFINITE);
            objectAnimator.setRepeatMode(ValueAnimator.REVERSE);
        }

        if (!objectAnimator.isStarted()) {
            objectAnimator.start();
        } else {
            objectAnimator.cancel();
        }
    }

    private static ValueAnimator valueAnimator;

    public static void performOnClick(final View view) {
        if (valueAnimator == null) {
            valueAnimator = ValueAnimator.ofObject(new IntEvaluator(), 0, 400);
            valueAnimator = ValueAnimator.ofInt(0, 300);
            valueAnimator
                    .setInterpolator(new AccelerateDecelerateInterpolator());
            valueAnimator.setDuration(2000);
            valueAnimator.setRepeatCount(ValueAnimator.INFINITE);
            valueAnimator.setRepeatMode(ValueAnimator.REVERSE);
            valueAnimator.setTarget(view);
            valueAnimator.addListener(new AnimatorListener() {

                @Override
                public void onAnimationStart(Animator animation) {
                    Log.d(TAG, "onAnimationStart");
                }

                @Override
                public void onAnimationRepeat(Animator animation) {
                    Log.d(TAG, "onAnimationRepeat");
                }

                @Override
                public void onAnimationEnd(Animator animation) {
                    Log.d(TAG, "onAnimationEnd");
                }

                @Override
                public void onAnimationCancel(Animator animation) {
                    Log.d(TAG, "onAnimationCancel");
                }
            });
            valueAnimator.addUpdateListener(new AnimatorUpdateListener() {

                @Override
                public void onAnimationUpdate(ValueAnimator animation) {
                    Integer animatedValue = (Integer) animation
                            .getAnimatedValue();
                    MarginLayoutParams marginLayoutParams = (MarginLayoutParams) view
                            .getLayoutParams();
                    marginLayoutParams.leftMargin = animatedValue;
                    view.setLayoutParams(marginLayoutParams);
                }
            });
        }

        if (valueAnimator.isStarted()) {
            valueAnimator.cancel();
        } else {
            valueAnimator.start();
        }
    }
}