为 Android 中的一组对象设置动画

Question

我有几个 TextView 对象需要使用相同 Animation.

设置动画

我这样做的方式看起来不对，因为我一次只能为每个对象设置 Animation

@Override
    public void onClick(View v) {

    Animation hideLeftBar, showLeftBar;

    hideLeftBar = new TranslateAnimation(195, 0, 0, 0);
    hideLeftBar.setDuration(1000);
    hideLeftBar.setFillAfter(true);

    showLeftBar = new TranslateAnimation(0, 195, 0, 0);
    showLeftBar.setDuration(1000);
    showLeftBar.setFillAfter(true);

    switch(v.getId())
    {
    case R.id.btGMG:

        if(img_GMG.getAlpha() == (float) 0.3)
        {
            img_GMG.setAlpha((float) 1);
            imgLeftBar.startAnimation(showLeftBar);
            txtRS.startAnimation(showLeftBar);
            txtST.startAnimation(showLeftBar);
            txtTR.startAnimation(showLeftBar);
            txtI1.startAnimation(showLeftBar);
            txtI2.startAnimation(showLeftBar);
            txtI3.startAnimation(showLeftBar);
            txtP1.startAnimation(showLeftBar);
            txtP2.startAnimation(showLeftBar);
            txtP3.startAnimation(showLeftBar);
            txtS1.startAnimation(showLeftBar);
            txtS2.startAnimation(showLeftBar);
            txtS3.startAnimation(showLeftBar);
            txtFP1.startAnimation(showLeftBar);
            txtFP2.startAnimation(showLeftBar);
            txtFP3.startAnimation(showLeftBar);
            textIndutive.startAnimation(showLeftBar);
            textCapacitive.startAnimation(showLeftBar);


        }
        else
        {
            img_GMG.setAlpha((float) 0.3);
            imgLeftBar.startAnimation(hideLeftBar);
            txtRS.startAnimation(hideLeftBar);
            txtST.startAnimation(hideLeftBar);
            txtTR.startAnimation(hideLeftBar);
            txtI1.startAnimation(hideLeftBar);
            txtI2.startAnimation(hideLeftBar);
            txtI3.startAnimation(hideLeftBar);
            txtP1.startAnimation(hideLeftBar);
            txtP2.startAnimation(hideLeftBar);
            txtP3.startAnimation(hideLeftBar);
            txtS1.startAnimation(hideLeftBar);
            txtS2.startAnimation(hideLeftBar);
            txtS3.startAnimation(hideLeftBar);
            txtFP1.startAnimation(hideLeftBar);
            txtFP2.startAnimation(hideLeftBar);
            txtFP3.startAnimation(hideLeftBar);
            textIndutive.startAnimation(hideLeftBar);
            textCapacitive.startAnimation(hideLeftBar);
        }


        break;
    }

}

我怎样才能减少这个？我应该编程还是使用XML资源？

Answer 1

它应该以编程方式实现。如果所有元素彼此显示相同，则可以使用 ListView 执行此操作。使用 ListView，您可以轻松地对元素执行更多操作。 List View | Android Developers

但是如果您想快速更改此代码，您可以使用 List of TextViews 并轻松使用它：

List<TextView> textViews = null;

public void onCreate(View v) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    textViews.add(findViewById(R.id.txtRS));
    textViews.add(findViewById(R.id.txtST));
    //Initialize other textViews here.
}

public void onClick(View v) {

    for (int i = 0; i < textViews.size(); i++) {
        textViews.get(i).startAnimation(showLeftBar);
    }
}

Answer 2

为了运行多个并行动画，您可以像这样使用 View 的 ViewPropertyAnimator：

for (int i = 0; i < parentView.getChildCount(); i++) { View childView = parentView.getChildAt(i); childView.animate().translationX(DELTA_X).setDuration(DURATION_ANIM); }

对于其他动画，您可以使用 .translationY()

Answer 3

你应该使用 AnimatorSet. It has a playTogether() function that will play all your animations at the same time. See a good example here.

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