场景

提示：基于期末作业开发+（自增轮播图）
在这里插入图片描述
自评：效果蛮丑的，功能都在，仅供参考！

内容：

一，引导页
1，设计引导页LogoActivity，添加引导页所需图片和引导圆点设计
//引导页面至少三张图片

public class LogoActivity extends AppCompatActivity {private List<ImageView> image_points;private LogoAdapter logoAdapter;private List<Integer> imageIds;private ViewPager vp_logo;private boolean isLastPage;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);
//       @SuppressLint("ResourceType") View login = findViewById(R.layout.activity_login);setContentView(R.layout.activity_logo);vp_logo = findViewById(R.id.vp_logo);imageIds = new ArrayList<>();imageIds.add(R.drawable.logo1);imageIds.add(R.drawable.logo2);imageIds.add(R.drawable.logo3);imageIds.add(R.drawable.logo4);logoAdapter = new LogoAdapter(imageIds, this);vp_logo.setAdapter(logoAdapter);image_points = new ArrayList<>();LinearLayout ll_points = findViewById(R.id.ll_points);for (int i = 0; i < imageIds.size(); i++) {ImageView imageView = new ImageView(this);imageView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,LinearLayout.LayoutParams.WRAP_CONTENT));imageView.setImageResource(R.drawable.point_blue);final int finalI = i;imageView.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View view) {vp_logo.setCurrentItem(finalI);}});image_points.add(imageView);ll_points.addView(imageView);}private void setPoint(int position) {for (int i = 0; i < image_points.size(); i++) {if (i == position) {image_points.get(i).setImageResource(R.drawable.point_blue);} else {image_points.get(i).setImageResource(R.drawable.point_pink);}}}
}

2，同时设计引导页面图片适配容器，item_logo布局

public class LogoAdapter extends PagerAdapter {List<Integer> imageIds ;Context ctx;public LogoAdapter(List<Integer> imageIds, Context ctx){this.imageIds = imageIds;this.ctx = ctx;}@NonNull@Overridepublic Object instantiateItem(@NonNull ViewGroup container, int position){ImageView imageView = (ImageView) LayoutInflater.from(ctx).inflate(R.layout.item_logo,container, false);imageView.setImageResource(imageIds.get(position));container.addView(imageView);return imageView;}@Overridepublic void destroyItem(@NonNull ViewGroup container,int position,@NonNull Object object){container.removeView((View) object);}@Overridepublic int getCount() {return imageIds.size();}@Overridepublic boolean isViewFromObject(@NonNull View view, @NonNull Object object) {return view == object;}
}
<?xml version="1.0" encoding="utf-8"?>
<ImageViewxmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"android:layout_height="match_parent"></ImageView>
3，在LogoActivity设计结束跳转登入页面vp_logo.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {@Overridepublic void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {setPoint(position);}@Overridepublic void onPageSelected(int position) {setPoint(position);isLastPage = position == imageIds.size() - 1;}@Overridepublic void onPageScrollStateChanged(int state) {if (isLastPage) {goLoginActivity();}}});setPoint(0);
}public void goLoginActivity() {startActivity(new Intent(this, LoginActivity.class));finish();
}

效果图：
在这里插入图片描述

二，登入界面
1，生成登入，LoginDataSource修改登入信息和样式

public class LoginDataSource {public Result<LoggedInUser> login(String username, String password) {try {// TODO: handle loggedInUser authenticationif(username.equals("郭淑瑛")&&password.equals("123")){LoggedInUser fakeUser =new LoggedInUser(java.util.UUID.randomUUID().toString(),username+"Doe");return new Result.Success<>(fakeUser);}else {return new Result.Error(new IOException("账号密码错误！"));}} catch (Exception e) {return new Result.Error(new IOException("Error logging in", e));}}public void logout() {// TODO: revoke authentication}
}

2，在LoginActivity加登入成功跳转事件，跳转到主页面

startActivity(new Intent(LoginActivity.this, MainActivity.class));

效果图：
在这里插入图片描述

三，主页面显示新闻列表
1，item_news_normal.xml规范列表样式部署item_news_tv_title，item_news_tv_time，item_news_tv_img

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:background="@color/palegoldenrod"android:layout_width="match_parent"android:layout_height="wrap_content"android:orientation="vertical"><LinearLayoutandroid:id="@+id/item_news_linearlayout"android:layout_width="fill_parent"android:layout_height="@dimen/item_news_height"android:layout_marginLeft="10dp"android:layout_marginRight="10dp"android:layout_marginTop="10dp"android:orientation="horizontal"android:visibility="visible"><TextViewandroid:id="@+id/item_news_tv_title"android:layout_width="fill_parent"android:layout_height="fill_parent"android:gravity="center_vertical"android:layout_marginLeft="8dp"android:layout_marginRight="8dp"android:layout_weight="1"android:ellipsize="end"android:maxLines="4"android:text="@string/default_text"android:textColor="@color/black"/><ImageViewandroid:id="@+id/item_news_tv_img"android:layout_width="fill_parent"android:layout_height="90dp"android:layout_weight="2"android:scaleType="fitXY"android:src="@mipmap/ic_launcher_round"/></LinearLayout><RelativeLayoutandroid:layout_width="fill_parent"android:layout_height="25dp"android:layout_marginBottom="10dp"android:layout_marginLeft="10dp"android:layout_marginRight="10dp"><TextViewandroid:id="@+id/item_news_tv_time"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_centerVertical="true"android:layout_marginLeft="5dp"android:text="10 minutes ago"android:textColor="@color/darkgray"android:textSize="12sp"/><TextViewandroid:id="@+id/item_news_tv_arrow"android:layout_width="3dp"android:layout_height="20dp"android:layout_alignParentRight="true"android:layout_centerVertical="true"android:background="@color/darkgray" /><TextViewandroid:id="@+id/item_news_tv_source"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentRight="true"android:layout_centerVertical="true"android:layout_marginBottom="10dp"android:layout_marginRight="10dp"android:layout_toLeftOf="@id/item_news_tv_arrow"android:text="@string/source_news_text"android:textColor="@color/darkgray"android:textSize="12sp"/></RelativeLayout>
</LinearLayout>

2，创建新闻容器NewsBean，和NewsHttp get json数据和解析所需数据标题等

private List<NewsBean> jsonNews(String json) {List<NewsBean> newsBeans = null;try {JSONObject jsonObject = new JSONObject(json);JSONArray jsonArray = jsonObject.getJSONArray("T1348647853363");newsBeans = new ArrayList<>();for (int i = 0; i < jsonArray.length(); i++) {JSONObject object = jsonArray.getJSONObject(i);String title = object.getString("title");String imgSrc = object.getString("imgsrc");String time = object.getString("mtime");NewsBean newsBean = new NewsBean(title, imgSrc, time);newsBeans.add(newsBean);}} catch (JSONException e) {e.printStackTrace();}return newsBeans;

3，在MainActivity调用使用

public View getView(int i, View view, ViewGroup viewGroup) {if (view == null) {view = LayoutInflater.from(MainActivity.this).inflate(R.layout.item_news_normal, viewGroup, false);}TextView tv_title = view.findViewById(R.id.item_news_tv_title);TextView tv_time = view.findViewById(R.id.item_news_tv_time);ImageView iv_img = view.findViewById(R.id.item_news_tv_img);tv_title.setText(getItem(i).getTitle());tv_time.setText(getItem(i).getTime());Glide.with(MainActivity.this).load(getItem(i).imgSrc).into(iv_img);return view;
}public void add(List<NewsBean> newsBeans) {MainActivity.this.newsBeans.clear();MainActivity.this.newsBeans.addAll(newsBeans);notifyDataSetChanged();
}

效果图：
在这里插入图片描述
四，轮播图
查看参考，是直接采用的方法