张思民安卓 第三次作业

张思民安卓第三次作业张思民安卓第三次作业张思民安卓第三次作业张思民安卓第三次作业编制仅供参考审核批准生效日期地址：电话：传真:邮编:1.Xml:<xmlversion=""encoding="utf-8"><LinearLayoutxmlns:android=""xmlns:tools=""android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity"android:orientation="vertical"><ImageViewandroid:layout_width="match_parent"android:layout_height="wrap_content"android:layout_weight="8"android:id="@+id/image"android:src="@mipmap/img1"/><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:orientation="horizontal"android:layout_weight="2"><Buttonandroid:layout_width="wrap_content"android:layout_height="match_parent"android:layout_weight="1"android:text="上一页"android:id="@+id/front"/><Buttonandroid:layout_width="wrap_content"android:layout_height="match_parent"android:layout_weight="1"android:text="下一页"android:id="@+id/tail"/></LinearLayout></LinearLayout>Java:packageclassMainActivityextendsAppCompatActivityimplements{privateButtonbutton1,button2;privateImageViewimageView;privateint[]imgs={intindex=0;finalintupper_limit=6;finalintlower_limit=-1;@OverrideprotectedvoidonCreate(BundlesavedInstanceState){(savedInstanceState);setContentViewbutton1=(Button)findViewByIdbutton2=(Button)findViewByIdimageView=(ImageView)findViewById(this);(this);}@OverridepublicvoidonClick(Viewv){if(v==button1){if(index==0){index=upper_limit;}index--;(imgs[index]);}elseif(v==button2){if(index==5){index=lower_limit;}index++;(imgs[index]);}}}2.Xml:<xmlversion=""encoding="utf-8"><LinearLayoutxmlns:android=""xmlns:tools=""android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity"android:orientation="vertical"><ImageSwitcherandroid:layout_width="match_parent"android:layout_height="wrap_content"android:id="@+id/imageSwitcher"android:layout_weight="7"></ImageSwitcher><Galleryandroid:layout_width="match_parent"android:layout_height="wrap_content"android:id="@+id/gallery"android:layout_weight="3"></Gallery></LinearLayout>JavapackageclassMainActivityextendsActivity{privateImageSwitcherimageSwitcher;privateGallerygallery;privateint[]imgs={@OverrideprotectedvoidonCreate(BundlesavedInstanceState){(savedInstanceState);setContentViewimageSwitcher=(ImageSwitcher)findViewById(newviewFactory());(this,(this,gallery=(Gallery)findViewById(newonItemSelectedListener());(10);(newbaseAdapter());}classonItemSelectedListenerimplements{@OverridepublicvoidonItemSelected(AdapterView<?>parent,Viewview,intposition,longid){((Integer)(position));}@OverridepublicvoidonNothingSelected(AdapterView<?>parent){}}classviewFactoryimplements{@OverridepublicViewmakeView(){ImageViewimageView=newImageView;returnimageView;}}classbaseAdapterextendsBaseAdapter{@OverridepublicintgetCount(){return;}@OverridepublicObjectgetItem(intposition){returnnull;}@OverridepubliclonggetItemId(intposition){returnimgs[position];}@OverridepublicView