ObjectAnimator 简单使用_objectanimator上下扫描-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_18481971/article/details/50696851

本文介绍了一个使用Android ObjectAnimator实现视图动画的实例。通过按钮触发，可以为TextView控件添加平移、旋转、透明度及缩放等动画效果。每个动画效果均设置了2秒的时长，并且可以在不同的轴上应用。

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public class MainActivity extends Activity implements OnClickListener{

private Button mTransX;
private Button mTransY;
private Button mRotation;
private Button mAlpha;
private Button mScaleX;
private Button mScaleY;
private TextView mTextView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mTextView = (TextView) findViewById(R.id.animate_view);
    mTransX = (Button) findViewById(R.id.translateX);
    mTransY = (Button) findViewById(R.id.translateY);
    mRotation = (Button) findViewById(R.id.rotation);
    mAlpha = (Button) findViewById(R.id.alpha);
    mScaleX = (Button) findViewById(R.id.scaleX);
    mScaleY = (Button) findViewById(R.id.scaleY);
    mTransX.setOnClickListener(this);
    mTransY.setOnClickListener(this);
    mRotation.setOnClickListener(this);
    mAlpha.setOnClickListener(this);
    mScaleX.setOnClickListener(this);
    mScaleY.setOnClickListener(this);
}
@Override
public void onClick(View v) {
    switch(v.getId()){
    case R.id.translateX:
        ObjectAnimator mTransX = ObjectAnimator.ofFloat(mTextView, "translationX", 0f, 50f);
        mTransX.setDuration(2000);// 设置时间
        mTransX.start();// 启动
        break;
    case R.id.translateY:
        ObjectAnimator mTransY = ObjectAnimator.ofFloat(mTextView, "translationY", 0f, 50f);
        mTransY.setDuration(2000);
        mTransY.start();
        break;
    case R.id.rotation:
        ObjectAnimator mRotation = ObjectAnimator.ofFloat(mTextView, "rotation", 0f, 360f);
        mRotation.setDuration(2000);
        mRotation.start();
        break;
    case R.id.alpha:
        ObjectAnimator mAlpha = ObjectAnimator.ofFloat(mTextView, "alpha", 0f, 1f);
        mAlpha.setDuration(2000);
        mAlpha.start();
        break;
    case R.id.scaleX:
        ObjectAnimator mScaleX = ObjectAnimator.ofFloat(mTextView, "scaleX", 0f, 5f);
        mScaleX.setDuration(2000);
        mScaleX.start();
        break;
    case R.id.scaleY:
        ObjectAnimator mScaleY = ObjectAnimator.ofFloat(mTextView, "scaleY", 0f, 5f);
        mScaleY.setDuration(2000);
        mScaleY.start();
        break;
    }
}

}