中软安卓-android周考试题

2016-07-29-107Android班JavaSE基础_5_答 2、显示启动、隐式启动3、standard、singleTask、singleTop、<style<item5、Activity运行态（Running）Activity暂停态（Paused）Activity被置于用户可见，但失去了焦点停止态（Stopped）ActivityActivity终止态（Destroyed）Activity被系统终止，资源被回收 、Paused、 、 1LinuxJava运行时环境、应用程序框架、应用3、 这时A页面显示，突然按HOME键，activityA>>>>onPause()>>>>onStop()activityA处于暂停状态AB页面activityA>>>>onPause(),然后activityB>>>>onCreate()>>>>onStart()>>>>onResume() 时B页面显示，activityA>>>>onStop()此时A页面处于暂停状态，BAactivityB>>>>onPause(),activityA>>>>onRestart()>>>>onStart()>>>>onResume()A页面显示，activityB>>>>onStop()>>>>onDestory(),B页面销毁4、（此题为参考答案，大致意思对都可以standardActivity时(startActivity)Activity实例，并放入任务栈；ActivityActivityActivity的特点是：只要ActivityActivityActivity实例在任务ActivityActivityActivitypop；如果任务栈中存在该ActivityActivity实例全部移除，调用该实例的singleInstance1的任务栈中创建了MainActivity2也要激MainActivityActivityActivity实例在任务Activity，都会通过调用四、程序题（参考答案<style<item<item<LinearLayoutxmlns:android="http://s android:orientation="horizontal"> tools:context=".MainActivity">android:textSize="50sp"/>packageimportjava.util.List;importandroid.app.Activity;importandroid.os.Bundle;importandroid.view.View;importandroid.widget.AdapterView;importandroid.widget.AdapterView.OnItemClickListener;importandroid.widget.ArrayAdapter;importandroid.widget.Button;importandroid.widget.Spinner;publicclassMainActivityextendsActivityimplementsOnClickListener//privateSpinnersp_1,sp_2,////privateList<String>list_1,list_2,publicStringstr1,str2,str3;publicButtonbutton;protectedvoidonCreate(BundlesavedInstanceState){////}privatevoidinitView()sp_1=(Spinner)findViewById(R.id.spinner_id_1);sp_2=(Spinner)findViewById(R.id.spinner_id_2);sp_3=(Spinner)findViewById(R.id.spinner_id_3);button=(Button)findViewById(R.id.button1);}privatevoidinitData()//list_1=newArrayList<String>();list_2=newArrayList<String>();list_3=new////list}//1//2//3}//adpterlistadapteradapter_1=newArrayAdapter<String>(this,adapter_2=newArrayAdapter<String>(this,adapter_3=newArrayAdapter<String>(this,//下拉框//adapterspinner中去publicvoidonItemSelected(AdapterView<?>parent,Viewview,intposition,longid){str3=}//TODOAuto-generatedmethod}publicvoidonItemSelected(AdapterView<?>parent,Viewview,intposition,longid){str2=}//TODOAuto-generatedmethod}//spinneritempublicvoidonItemSelected(AdapterView<?>parent,Viewview,intposition,longid){//str1=//switch((int)id)//case//Intentintent=new////////case//Intentintent1=new////////case//Intentintent2=new////////case//Intentintent3=new////////////}}

}publicvoidonClick(Viewv){switch(v.getId()){case//Intentintent=newIntent(MainActivity.this,NewActivity.class);intent.putExtra("list_1",str1);}}}<RelativeLayoutxmlns:android="http://s tools:context=".MainActivity"android:padding="0.3dp">android:padding="5dp">android:layout_height="wrap_content"/>android:padding="5dp">android:layout_height="wrap_content"/>android:padding="5dp">android:layout_height="wrap_content"/>android:text="选择完毕"/>另一个packageimportandroid.app.Activity;importandroid.content.Intent;importandroid.os.Bundle;importandroid.widget.TextView;publicclassNewActivityextendsActivitypublicTextViewtext_view_1,text_view_2,protectedvoidonCreate(BundlesavedInstanceState)//TODOAuto-generatedmethodstubtext_view_1=(TextView)findViewById(R.id.text_view_id_1);text_view_2=(TextView)findViewById(R.id.text_view_id_2);text_view_3=(TextView)findViewById(R.id.text_view_id_3);Intentintent=getIntent();Stringlist11=intent.getStringExtra("list_1");Stringlist22=intent.getStringExtra("list_2");Stringlist33=intent.getStringExtra("list_3");}}对应布局文件<?xmlversion="1.0"encoding="utf-<LinearLayoutxmlns:android="http://s android:orientation="vertical" "/> "/> "/>importjava.util.List;importcom.pb.android_107_6_03_test.R;importandroid.content.Context;importimportandroid.view.View;importandroid.view.ViewGroup;importandroid.widget.Button;importandroid.widget.TextView;publicclassMyAdapterextendsBaseAdapter//本地化（MyAdapter）publicList<String>list=////publicMyAdapter(Contextcontext,List<String>list){this.list=list;//inflater=}//返回集合的长度（数据源的长度publicintgetCount()return}//itempublicObjectgetItem(intposition){returnlist.get(position);}publiclonggetItemId(intposition){returnposition;}判断convertViewitem（是否为空，为空则创建新的对象，不为空则不创建新的convertView对象//一个内部类对象ViewHolderholdernull;if(convertView==null){//holder=new//创建convertView(视图)Log.d("创建convertView的次数", Log.d("创建text的次数", Log.d("创建button的次数","findViewById //XML}else//holder=(ViewHolder)}returnconvertView;}//staticclassViewHolder{TextViewtext;Buttonbutton;}}packageimportjava.util.List;importandroid.app.Activity;importandroid.os.Bundle;publicclassMainActivityextendsActivity{publicListViewlist_vie