我相信我的xml是正确的,但我不确定在我的代码中导致此错误的原因。我试图在一个imagebutton上尝试animationdrawable,但每次点击我的按钮时都会出现错误。AnimationDrawable单击按钮时出错
这里是我的动画列表 “music_icon”:
<animation-list xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/selected" android:oneshot="true">
<item android:drawable="@drawable/musicon1" android:duration="50" />
<item android:drawable="@drawable/musicon2" android:duration="50" />
<item android:drawable="@drawable/musicon3" android:duration="50" />
<item android:drawable="@drawable/musicon4" android:duration="50" />
<item android:drawable="@drawable/musicon5" android:duration="50" />
</animation-list>
我mainActivity.java:
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ImageButton;
import android.graphics.drawable.AnimationDrawable;
public class HomeScreen extends AppCompatActivity {
ImageButton musicEnable_ImageButton;
Handler musicIcon_animate = new Handler();
int ArrayPos = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home_screen);
musicEnable_ImageButton = (ImageButton) findViewById(R.id.soundEnable_button);
musicEnable_ImageButton.setBackgroundResource(R.drawable.musicoff);
musicEnable_ImageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
musicEnable_ImageButton.setBackgroundResource(R.drawable.music_icon);
final AnimationDrawable frameAnimation = (AnimationDrawable) musicEnable_ImageButton.getBackground();
frameAnimation.start();
}
});
}
我layout.xml:
下面是错误信息:
06-07 05:00:48.004 19844-19844/com.example.comp.app_name E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.ClassCastException: android.graphics.drawable.StateListDrawable cannot be cast to android.graphics.drawable.AnimationDrawable
at com.example.comp.app_name.HomeScreen$1.onClick(HomeScreen.java:36)
at android.view.View.performClick(View.java:4240)
at android.view.View$PerformClick.run(View.java:17721)
at android.os.Handler.handleCallback(Handler.java:730)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
两
'StateListDrawable不能转换到android.graphics.drawable.AnimationDrawable' –
http://stackoverflow.com/questions/5299219/button-states-with-background-as-animationdrawable-in-android –