在Android中,在OnClick中显示按钮动画吗? [英] In Android, Display pressed button animation in OnClick?
问题描述
在调用onClick时,如何在按钮中制作动画我没有找到直接的答案.我有一个如下的custom_btn.xml:
I haven't found a straight answer to how to make an animation in a button when onClick is called. I've got a custom_btn.xml like so:
<?xml version="1.0" encoding="utf-8"?>
<selector
xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true" android:drawable="@drawable/btn_pressed"></item>
<item android:state_focused="true" android:drawable="@drawable/btn_on"></item>
<item android:drawable="@drawable/btn"></item>
</selector>
动画位于btn_pressed.xml中,如下所示:
and the animation is in btn_pressed.xml like so:
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="@drawable/btn_on_1" android:duration="30" />
<item android:drawable="@drawable/btn_on_2" android:duration="30" />
<item android:drawable="@drawable/btn_on_3" android:duration="30" />
<item android:drawable="@drawable/btn_on_4" android:duration="30" />
<item android:drawable="@drawable/btn_on_5" android:duration="30" />
</animation-list>
我的问题是我似乎无法在此处的onClickListener中找到正确的代码:
my problem is that I can't seem to find the right code to go in the onClickListener here:
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//-- what is the proper animation call that would go here
to make btn_pressed.xml cycle only once when pressed?
}
});
谢谢!
推荐答案
来自Android文档: http://developer.android.com/guide/topics/resources/animation -resource.html
From the Android documentation: http://developer.android.com/guide/topics/resources/animation-resource.html
示例: XML文件保存在res/anim/rocket.xml:
example: XML file saved at res/anim/rocket.xml:
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
android:oneshot="false">
<item android:drawable="@drawable/rocket_thrust1" android:duration="200" />
<item android:drawable="@drawable/rocket_thrust2" android:duration="200" />
<item android:drawable="@drawable/rocket_thrust3" android:duration="200" />
</animation-list>
此应用程序代码会将动画设置为View的背景,然后播放动画:
This application code will set the animation as the background for a View, then play the animation:
ImageView rocketImage = (ImageView) findViewById(R.id.rocket_image);
rocketImage.setBackgroundResource(R.drawable.rocket_thrust);
rocketAnimation = (AnimationDrawable) rocketImage.getBackground();
rocketAnimation.start();
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