找不到 xml 文件动画的符号

Question

我需要帮助。它说：错误：找不到符号 fruitImage.setBackgroundResource(R.drawable.myfruits); ^ 符号：变量 myfruits 位置：class 可绘制

--------------------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>

----------------MainActivity-----------------

 @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

这里是解释。

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activity---

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

找不到 xml 文件动画的符号

Cannot find symbol of xml file animation

java

android-animation

android-studio