江蘇開(kāi)放大學(xué)Android基礎(chǔ)-2次形考作業(yè)答案

1、作業(yè)說(shuō)明：.做作業(yè)之前首先在封面填上自己的學(xué)號(hào)和姓名，做完作業(yè)后請(qǐng)寫(xiě)上作業(yè)完成時(shí)間。.學(xué)習(xí)完第4-6單元之后必須完本錢(qián)次作業(yè)，并請(qǐng)?jiān)谝?guī)定時(shí)間內(nèi)通過(guò)學(xué)習(xí)平臺(tái)提交Word文檔形式的電子作業(yè)，本次作業(yè)占形成性考核總成績(jī)的20%o作業(yè)內(nèi)容：請(qǐng)將學(xué)習(xí)單元4、5、6中實(shí)驗(yàn)局部的工程中程序文件（.java文件，不包括資源文 件.xml）源碼貼在以下位置，格式為先寫(xiě)文件名后貼代碼，如下：1 MainActivity.javapackage import單元4on Attach?；卣{(diào)方法Public static class FragmentA extends ListFragmentOnArticlesSel

2、ectedListener listener; OverridePublic void onAttach(Context context)super.onAttach(context);tryListener=(OnArticlesSelectedListener)context; catch(ClassCastException e)thrownew ClassCastExceptiocontext.toStringO+must implementOnArticleSelectedListener,r);) )通過(guò)調(diào)用onArticleSelected。與Activity共享事件: publ

3、ic static class FragmentA extends ListFragmentOnArticleSelectedListener listener; Overridepublic void onListItemClick(ListView l,View v, int position,long id)/Append the clicked items row ID with the content provider UriUri noteUri=ContentUris.withAppendedId(ArticleColumns.CONTENT_URI,id);/Send the

4、event and Uri to the host activity Listener.onArticleSelected(noteUri);) )單元5廣播接收器記錄并顯示廣播內(nèi)容public class MyBroadcastReceiver extends BroadcastReceiverprivate static final String TAG=MyBroadcastReceiver;Overridepublic void onReceive(Context context,Intent intent)StringBuilder sb=new StringBuilder();sb

5、.append(Action:+intent.getAction()+n);sb.append(URI:+iment.toUri(Inten.URINTENT_SCHEME).toString()+n);String log=sb.toString();Log.d(TAQlog);Toast.makeText(context,log,Toast.LENGTH_LONG).show();)適用于后臺(tái)線程public class MyBroadcastReceiver extends BroadcastReceiverprivate static final String TAG=MyBroadc

6、astReceiver;Overridepublic void onReceive(Context context,Intent intent) final PendingResult pendingResult=goAsync();Task asyncTask=new Task(pendingResult,intent);asyncTask.execute();)Private static class Task extends AsyncTaskprivate final PendingResult pendingResult;private final Intent intent;pri

7、vate Task(PendingResult pendingResult,Intent intent) this.pendingResult=pendingResulfthis, intent二intent;)OverrideProtected String doInBackground(String. strings)(StringBuilder sb=new StringBuilder();sb.append(Action:+intent.getAction()+rr);sb.append(URI:+intent.toUri(Intent.URINTENT_SCHEME).toStrin

8、g()+“ir);String log=sb.toString();Log.d(TAQlog);return log;)Overrideprotected void onPostExecute(String s)super.onPostExecute(s);/Must call finish()so the BroadcastReceiver can be recycled.pendingResult.finish();單元6在Activity中定義一個(gè)ServiceConnection類(lèi)和DownloadBinder對(duì)象，并初始化代碼:private ServiceConnection mS

9、erviceConnection;private DownloadBinder mDownloadBinder;mServiceConnection-new ServiceConnectionOlpublic voidpublic voidonServiceConnected(ComponentNamename,IBinder service)1mDownloadBinder (DownloadBinder)service;實(shí)現(xiàn) Button3、Button4 Button5 Button6 點(diǎn)擊事件代碼Button3:Intent bindintent-new Intent(this,MyService class);bindService(bindIntent,mServiceConnec