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都说工作不好找,我们公司招人就是找不到

2013-07-23 09:54 495 查看
做了个简单的帧动画,在onCreate方法中start,发现只能看到第一帧
<?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/fire01"
android:duration="200"/>
<item
android:drawable="@drawable/fire02"
android:duration="200"/>
<item
android:drawable="@drawable/fire03"
android:duration="200"/>
<item
android:drawable="@drawable/fire04"
android:duration="200"/>
<item
android:drawable="@drawable/fire05"
android:duration="200"/>
<item
android:drawable="@drawable/fire06"
android:duration="200"/>
<item
android:drawable="@drawable/fire07"
android:duration="200"/>
<item
android:drawable="@drawable/fire08"
android:duration="200"/>
<item
android:drawable="@drawable/fire09"
android:duration="200"/>

</animation-list>


<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<ImageView
android:id="@+id/fire_img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:background="@drawable/fire_anim" />
</RelativeLayout>


ImageView fireImg = null;

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

ImageView fireImg = (ImageView) findViewById(R.id.fire_img);
final AnimationDrawable animDrawable = (AnimationDrawable) fireImg
.getBackground();
animDrawable.start();
}


stackoverflow 上发现一个解决办法
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

ImageView fireImg = (ImageView) findViewById(R.id.fire_img);
final AnimationDrawable animDrawable = (AnimationDrawable) fireImg
.getBackground();
fireImg.post(new Runnable() {
@Override
public void run() {
animDrawable.start();
}
});
}


或者在Activity中的onWindowFocusChanged方法中start
@Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
if (fireImg != null) {
AnimationDrawable animDrawable = (AnimationDrawable) fireImg
.getBackground();
animDrawable.start();
}
}
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