我想創建一個動畫。 爲什麼我得到這個錯誤?使用動畫和線程
12月1日至16日:09:33.388:E/AndroidRuntime(895):致命異常:螺紋10
12月1日至16日:09:33.388:E/AndroidRuntime(895):
java.lang.NullPointerException 01-16 12:09:33.388: E/AndroidRuntime(895):at com.example.pages.Comments.initialImageViewSms(Comments.java:38)01-16 12:09: 33.388:E/AndroidRuntime(895):在 com.example.pages.Comments.access $ 0(Comments.java:36)01-16 12:09:33.388:E/AndroidRuntime(895):at com.example.pages.Comments $ 1.run(Comments.java:24)01-16 12:09:33.388: E/AndroidRuntime(895):at java.lang.Thread.run(Thread.java:1020) 01-16 12:09:45.587:E/AndroidRuntime(906):致命例外:線程10 01-16 12:09:45.587:E/AndroidRuntime(906): java.lang.NullPointerException 01-16 12 :09:45.587: E/AndroidRuntime(906):at com.example.pages.Comments.initialImageViewSms(Comments.java:38)01-16 12:09:45.587:E/AndroidRuntime(906):at com.example.pages.Comments.access $ 0(Comments.java:36)01-16 12:09:45.587:E/AndroidRuntime(906):at com.example.pages.Comments $ 1.run(Comments.java :24)01-16 12:09:45.587: E/AndroidRuntime(906):a t java.lang.Thread.run(Thread.java:1020) 01-16 12:15:11.178:E/AndroidRuntime(990):致命例外:Thread-10 01-16 12:15:11.178:E/AndroidRuntime(990): java.lang.NullPointerException 01-16 12:15:11.178: E/AndroidRuntime(990):at com.example.pages.Comments.initialImageViewSms(Comments.java:37)01-16 12:15:11.178:E/AndroidRuntime(990):在 com.example.pages.Comments.access $ 0(Comments.java:35)01-16 12:15:11.178:E/AndroidRuntime(990):at E/AndroidRuntime(990):at java.lang.Thread.run(Thread.java:1020)
BaseFragment:
package com.example.pages;
import android.support.v4.app.Fragment;
public class BaseFragment extends Fragment {
}
評論:
package com.example.pages;
import android.graphics.drawable.AnimationDrawable;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.Toast;
public class Comments extends BaseFragment {
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
initialImageViewSms();
}
}).start();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.comments,container,false);
return view;
}
private void initialImageViewSms(){
ImageView imageview_sendsms = (ImageView)getView().findViewById(R.id.imagebutton_send_sms);
imageview_sendsms.setBackgroundResource(R.drawable.send_sms_anim);
AnimationDrawable animdrawable = (AnimationDrawable)imageview_sendsms.getBackground();
animdrawable.start();
}
}
send_sms_anim.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/send_sms_one"
android:duration="100"/>
<item
android:drawable="@drawable/send_sms_two"
android:duration="100"/>
</animation-list>
檢查此[http://www.androidhive。info/2013/06/android-working-with-xml-animations /]爲你的問題,可能是這樣解決你的問題 –
爲什麼你從一個線程開始你的動畫? – njzk2