小编Eri*_*ric的帖子

我尝试实现以下代码来处理屏幕方向更改.

****DataBaseUpdateService.java****

public class DataBaseUpdateService extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState); 

        Updatetask Task = new Updatetask(this.getApplicationContext());
            if(Task.getStatus() == AsyncTask.Status.PENDING){
            Task.execute();};
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
    }

    @Override
    public void  onPause() {
        super.onPause();
    }

    @Override
    public void onResume() {
        super.onResume();
    }
}

================================================== ========================

****Androidmanifest.xml****
 <activity 
  android:name=".DataBaseUpdateService"
  android:configChanges="keyboardHidden|orientation"/>

这些代码与android 3.x或更低版本完美配合.但是,它无法正常运行android 4.x.

你知道问题是什么吗？

当我使用从这里下载的guava库时,我目前面临java.lang.NoClassDefFoundError:com.google.common.collect.HashBiMap的问题:http: //code.google.com/p/guava-libraries/

我已经将guava-12.0.jar添加到我的项目中作为参考库但我仍然得到错误.你能就这个问题给出一些建议吗？谢谢您的帮助

package my.project;

import android.app.Activity;
import android.os.Bundle;

import com.google.common.collect.BiMap;
import com.google.common.collect.HashBiMap;

public class MainActivity extends Activity{

     private BiMap<String,String>  bidiMap; 

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);     
          setContentView(R.layout.bible_help_cal);

        bidiMap = HashBiMap.create();           
        bidiMap.put("a","100");
        bidiMap.put("b","200");


    }


}

我得到的错误消息

05-29 18:35:19.737: E/AndroidRuntime(376): FATAL EXCEPTION: main
05-29 18:35:19.737: E/AndroidRuntime(376): java.lang.NoClassDefFoundError: com.google.common.collect.HashBiMap
05-29 18:35:19.737: E/AndroidRuntime(376):  at my.project.MainActivity.onCreate(MainActivity.java:18)
05-29 18:35:19.737: E/AndroidRuntime(376):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048)
05-29 18:35:19.737: E/AndroidRuntime(376):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1712)
05-29 18:35:19.737: E/AndroidRuntime(376):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1764)
05-29 18:35:19.737: E/AndroidRuntime(376):  at android.app.ActivityThread.access$1500(ActivityThread.java:122)
05-29 18:35:19.737: E/AndroidRuntime(376):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1002) …