我有同样的问题。我知道这个帖子已经有一个月了,但也许有人会看我的经历。
我不知道为什么,但谷歌不接受像他的照片名称中的“_”这样的空间,而将其用于动画。我使用像“loading_frame1”这样的名称,它不起作用。我改变了名称类似于 “loadingframe1” 和它的作品....
前:
<?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/loading_frame1" android:duration="100" />
<item android:drawable="@drawable/loading_frame2" android:duration="100" />
<item android:drawable="@drawable/loading_frame3" android:duration="100" />
<item android:drawable="@drawable/loading_frame4" android:duration="100" />
<item android:drawable="@drawable/loading_frame5" android:duration="100" />
<item android:drawable="@drawable/loading_frame6" android:duration="100" />
<item android:drawable="@drawable/loading_frame7" android:duration="100" />
<item android:drawable="@drawable/loading_frame8" android:duration="100" />
<item android:drawable="@drawable/loading_frame9" android:duration="100" />
<item android:drawable="@drawable/loading_frame10" android:duration="100" />
<item android:drawable="@drawable/loading_frame11" android:duration="100" />
<item android:drawable="@drawable/loading_frame12" android:duration="100" />
<item android:drawable="@drawable/loading_frame13" android:duration="100" />
<item android:drawable="@drawable/loading_frame14" android:duration="100" />
<item android:drawable="@drawable/loading_frame15" android:duration="100" />
<item android:drawable="@drawable/loading_frame16" android:duration="100" />
<item android:drawable="@drawable/loading_frame17" android:duration="100" />
<item android:drawable="@drawable/loading_frame18" android:duration="100" />
<item android:drawable="@drawable/loading_frame19" android:duration="100" />
<item android:drawable="@drawable/loading_frame20" android:duration="100" />
</animation-list>
后:
<?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/loadingframe1" android:duration="100" />
<item android:drawable="@drawable/loadingframe2" android:duration="100" />
<item android:drawable="@drawable/loadingframe3" android:duration="100" />
<item android:drawable="@drawable/loadingframe4" android:duration="100" />
<item android:drawable="@drawable/loadingframe5" android:duration="100" />
<item android:drawable="@drawable/loadingframe6" android:duration="100" />
<item android:drawable="@drawable/loadingframe7" android:duration="100" />
<item android:drawable="@drawable/loadingframe8" android:duration="100" />
<item android:drawable="@drawable/loadingframe9" android:duration="100" />
<item android:drawable="@drawable/loadingframe10" android:duration="100" />
<item android:drawable="@drawable/loadingframe11" android:duration="100" />
<item android:drawable="@drawable/loadingframe12" android:duration="100" />
<item android:drawable="@drawable/loadingframe13" android:duration="100" />
<item android:drawable="@drawable/loadingframe14" android:duration="100" />
<item android:drawable="@drawable/loadingframe15" android:duration="100" />
<item android:drawable="@drawable/loadingframe16" android:duration="100" />
<item android:drawable="@drawable/loadingframe17" android:duration="100" />
<item android:drawable="@drawable/loadingframe18" android:duration="100" />
<item android:drawable="@drawable/loadingframe19" android:duration="100" />
<item android:drawable="@drawable/loadingframe20" android:duration="100" />
</animation-list>
而这里LoadingAnimation.class上市
package com.justkidding.animation;
import android.support.v7.app.ActionBarActivity;
import android.graphics.drawable.AnimationDrawable;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageView;
public class LoadingAnimation extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_loading_animation);
}
@Override
public void onWindowFocusChanged (boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
ImageView animation = (ImageView)findViewById(R.id.aniimage);
animation.setBackgroundResource(R.drawable.loading_animation);
AnimationDrawable frameAnimation = (AnimationDrawable) animation.getBackground();
if(hasFocus) {
frameAnimation.start();
} else {
frameAnimation.stop();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.loading_animation, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
animation.xml的发布源。 – alanv
这不是问题所在。问题出在Google的代码上。您无法将BitmapDrawable转换为AnimationDrawable。 – TheOneX
如果animation.xml定义了一个AnimationDrawable,这应该起作用。 View.getBackground()只返回从后台XML资源加载的drawable。该文件是正确的。可能有另一个问题。 – alanv