Android 帧动画

在 drawable 目录下新建 frames.xml

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
    android:oneshot="false">

    <item
        android:drawable="@drawable/p1"
        android:duration="50" />

    <item
        android:drawable="@drawable/p2"
        android:duration="50" />

    <item
        android:drawable="@drawable/p3"
        android:duration="50" />

    <item
        android:drawable="@drawable/p4"
        android:duration="50" />

</animation-list>

在页面中调用 frames.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <ImageView
        android:id="@+id/iv"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        app:srcCompat="@drawable/frames" />

</LinearLayout>

解析并开启动画

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ImageView iv = findViewById(R.id.iv);

        AnimationDrawable animationDrawable = (AnimationDrawable) iv.getDrawable();
        if(!animationDrawable.isRunning()){
            animationDrawable.start();
        }
    }
}

下面是纯代码方式实现

AnimationDrawable animationDrawable1 = new AnimationDrawable();
int[] ids = {R.drawable.p1,R.drawable.p2,R.drawable.p3,R.drawable.p4};
for(int i = 0 ; i < 4 ; i ++){
    Drawable frame = getResources().getDrawable(ids[i]);
    animationDrawable1.addFrame(frame,50);
}
animationDrawable1.setOneShot(false);
iv.setBackground(animationDrawable1);
animationDrawable1.start();

# Android

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Android 帧动画

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