本文主要是介绍Android Drawable Resources系列6:transition，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
定义：可以控制两张图片之间的淡入淡出效果(不超过两张)，通过startTransition()执行，reverseTransition()撤销.
用法：
<?xml version="1.0" encoding="utf-8"?>
<transition
xmlns:android="http://schemas.android.com/apk/res/android" ><itemandroid:drawable="@[package:]drawable/drawable_resource"android:id="@[+][package:]id/resource_name"android:top="dimension"android:right="dimension"android:bottom="dimension"android:left="dimension" />
</transition>| 属性 | 作用 |
| android:drawable | 图片资源 |
| android:top、android:right、android:bottom、android:left | 距离各边的距离 |
官方示例：
XML file saved at res/drawable/transition.xml:
<?xml version="1.0" encoding="utf-8"?>
<transition xmlns:android="http://schemas.android.com/apk/res/android"><item android:drawable="@drawable/on" /><item android:drawable="@drawable/off" />
</transition>
This layout XML applies the drawable to a View:<ImageButtonandroid:id="@+id/button"android:layout_height="wrap_content"android:layout_width="wrap_content"android:src="@drawable/transition" />
And the following code performs a 500ms transition from the first item to the second:ImageButton button = (ImageButton) findViewById(R.id.button);
TransitionDrawable drawable = (TransitionDrawable) button.getDrawable();
drawable.startTransition(500);效果：
xml文件：
<?xml version="1.0" encoding="utf-8"?>
<transition xmlns:android="http://schemas.android.com/apk/res/android"><item android:drawable="@mipmap/reasource_drawable_mn"/><item android:drawable="@mipmap/reasource_drawable_mn2"/>
</transition>Activity中：
final TransitionDrawable drawable = (TransitionDrawable) img_transition.getDrawable();btn_startTransition.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {drawable.startTransition(2000);}});btn_reverseTransition.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {drawable.reverseTransition(2000);}});效果：
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