Android属性动画(透明,平移,旋转,缩放,组合)

布局就是几个按钮和实现动画的载体

实现动画代码

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private TextView mText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mText = (TextView) findViewById(R.id.tv_text);
        findViewById(R.id.btn_alpha).setOnClickListener(this);
        findViewById(R.id.btn_translation).setOnClickListener(this);
        findViewById(R.id.btn_rotation).setOnClickListener(this);
        findViewById(R.id.btn_scale).setOnClickListener(this);
        findViewById(R.id.btn_color).setOnClickListener(this);
        findViewById(R.id.btn_all).setOnClickListener(this);
        mText.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "---", Toast.LENGTH_LONG).show();
            }
        });
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn_alpha://实现透明度
                ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(mText, "alpha", 1, 0.8f, 0.6f, 0.2f, 0, 0.2f, 0.5f, 1);
                objectAnimator.setDuration(6000);
                objectAnimator.start();
                break;
            case R.id.btn_translation://平移
                //translationY Y轴平移 translationX  X轴平移
                ObjectAnimator objectAnimator1 = ObjectAnimator.ofFloat(mText, "translationY", 0, 100, 300, 500, 300, 0);
                objectAnimator1.setDuration(2000);
                objectAnimator1.setRepeatCount(10);
                objectAnimator1.start();
                break;
            case R.id.btn_rotation://旋转
                ObjectAnimator objectAnimator2 = ObjectAnimator.ofFloat(mText, "rotation", 0, 90, 270);
                objectAnimator2.setDuration(3000);
                objectAnimator2.start();
                break;
            case R.id.btn_scale://缩放
                ObjectAnimator objectAnimator3 = ObjectAnimator.ofFloat(mText, "scaleY", 1, 2, 3, 2, 1, 0.5f, 0.1f);
                objectAnimator3.setDuration(3000);
                objectAnimator3.start();
                break;
            case R.id.btn_color://改变颜色
                ObjectAnimator objectAnimator4 = ObjectAnimator.ofInt(mText, "backgroundColor",    
                       Color.RED, Color.YELLOW, Color.BLACK, Color.BLUE);
                objectAnimator4.setDuration(3000);
                objectAnimator4.start();
                break;
            case R.id.btn_all://组合
                int width = getWindowManager().getDefaultDisplay().getWidth();
                int height = getWindowManager().getDefaultDisplay().getHeight();
                ObjectAnimator objectAnimator5 = ObjectAnimator.ofFloat(mText,
                                              "translationX", 0, width - dip2px(50));
                ObjectAnimator objectAnimator5_Y = ObjectAnimator.ofFloat(mText,
                                             "translationY", 0, height - dip2px(175));
                ObjectAnimator objectAnimator8=ObjectAnimator.ofInt(mText,
                          "backgroundColor", Color.RED,Color.YELLOW,Color.BLACK,Color.BLUE);
                //after 先执行哪个
                //before 后执行哪个
                //with 同时执行
                AnimatorSet animatorSet = new AnimatorSet();
                // animatorSet.playSequentially(objectAnimator5,objectAnimator5_Y);
                animatorSet.play(objectAnimator5).with(objectAnimator5_Y).with(objectAnimator8);
                animatorSet.setDuration(3000);

                animatorSet.addListener(new Animator.AnimatorListener() {
                    @Override
                    public void onAnimationStart(Animator animation) {
                    }
                    @Override
                    public void onAnimationEnd(Animator animation) {
                        Toast.makeText(MainActivity.this, "END", Toast.LENGTH_LONG).show();
                    }
                    @Override
                    public void onAnimationCancel(Animator animation) {
                    }
                    @Override
                    public void onAnimationRepeat(Animator animation) {
                    }
                });
                animatorSet.start();
                break;
        }
    }
    public int dip2px(float dpValue) {
        final float scale = getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }

}