找不到xml文件动画的符号

Question

我需要帮助。上面写着：错误：找不到符号fruitImage.setBackgroundResource(R.drawable.myfruits(；^符号：变量myfruits位置：可分级提取

----------------------这是代码------------------

myfruits.xml (located at drawable)
<?xmlversion="1.0"encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/img_grapes" android:duration="200"/>
<item android:drawable="@drawable/img_lemon" android:duration="200"/>
<item android:drawable="@drawable/img_orange" android:duration="200"/>
<item android:drawable="@drawable/img_pear" android:duration="200"/>
<item android:drawable="@drawable/img_strawberry" android:duration="200"/>
</animation-list>

---------------主要活动------------------

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ImageView fruitImage = (ImageView) findViewById(R.id.imgFruit);
fruitImage.setBackgroundResource(R.drawable.myfruits);
fruitAnimation = (AnimationDrawable) fruitImage.getBackground();
}

Answer 1

以下是解释。

https://developer.android.com/reference/android/graphics/drawable/AnimationDrawable

在您的代码中，您必须更改myfruits.xml.

<animation-list android:id="@+id/selected" android:oneshot="false">
<item android:drawable="@drawable/img_grapes" android:duration="200"/>
<item android:drawable="@drawable/img_lemon" android:duration="200"/>
<item android:drawable="@drawable/img_orange" android:duration="200"/>
<item android:drawable="@drawable/img_pear" android:duration="200"/>
<item android:drawable="@drawable/img_strawberry" android:duration="200"/>
</animation-list>

-----主要活动——

ImageView fruitImage = (ImageView) findViewById(R.id.imgFruit);
fruitImage.setBackgroundResource(R.drawable.myfruits);
AnimationDrawable fruitAnimation = (AnimationDrawable) fruitImage.getBackground();
fruitAnimation.start();