您可以在DialogFragment内部完成此操作,而无需更改。
getDialog().getWindow()
.getAttributes().windowAnimations
你应该在 onStart 和 onClick 中动画化 "decor view"。
这是代码片段:
首先创建对话框
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
return new AlertDialog.Builder(getActivity())
.setTitle("Hello from animated dialog :)")
.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
}
)
.setCancelable(false)
.create();
}
然后覆盖onStart方法
@Override
public void onStart() {
super.onStart();
AlertDialog dialog = (AlertDialog)getDialog();
final View decorView = getDialog()
.getWindow()
.getDecorView();
ObjectAnimator scaleDown = ObjectAnimator.ofPropertyValuesHolder(decorView,
PropertyValuesHolder.ofFloat("scaleX", 0.0f, 1.0f),
PropertyValuesHolder.ofFloat("scaleY", 0.0f, 1.0f),
PropertyValuesHolder.ofFloat("alpha", 0.0f, 1.0f));
scaleDown.setDuration(2000);
scaleDown.start();
Button positiveButton = dialog.getButton(Dialog.BUTTON_NEGATIVE);
positiveButton.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
final View decorView = getDialog()
.getWindow()
.getDecorView();
ObjectAnimator scaleDown = ObjectAnimator.ofPropertyValuesHolder(decorView,
PropertyValuesHolder.ofFloat("scaleX", 1.0f, 0.0f),
PropertyValuesHolder.ofFloat("scaleY", 1.0f, 0.0f),
PropertyValuesHolder.ofFloat("alpha", 1.0f, 0.0f));
scaleDown.addListener(new Animator.AnimatorListener() {
@Override
public void onAnimationEnd(Animator animation) {
dismiss();
}
@Override
public void onAnimationStart(Animator animation) {
}
@Override
public void onAnimationCancel(Animator animation) {
}
@Override
public void onAnimationRepeat(Animator animation) {
}
});
scaleDown.setDuration(2000);
scaleDown.start();
}
});
}
这是结果动画
![结果演示](https://istack.dev59.com/MRQDj.gif)
如果您从我的代码中删除比例属性,您将仅获得alpha动画,就像您所希望的那样。
请删除以下内容:
PropertyValuesHolder.ofFloat("scaleX", 1.0f, 0.0f),
PropertyValuesHolder.ofFloat("scaleY", 1.0f, 0.0f),