相关视频教程在某站上面(🔍浩宇软件开发)
1. 项目模块功能思维导图
2. 项目涉及到的技术点
- 数据来源：聚合数据API
- 使用okhttp网络请求框架获取api数据
- 使用gson库解析json数据
- 使用RecyclerView+adapter实现新闻列表
- 使用SQLite数据库实现用户登录，注册，浏览历史记录
- 使用SharedPreferences 实现记住密码登录
- 使用TabLayout+ViewPager2实现新闻分类滑动
- 使用DrawerLayout+NavigationView实现抽屉
- 使用WebView实现新闻详情数据加载
- 使用Glide实现新闻图片加载
3. 项目截图
3. 部分代码实现
- 欢迎页实现
public class WelcomeActivity extends AppCompatActivity {
private TextView tvCountdown;
private CountDownTimer countDownTimer;
private long timeLeftInMillis = 3000; // 设置倒计时时长，单位为毫秒
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_welcome);
//初始化控件
tvCountdown =findViewById(R.id.tv_countdown);
// 启动倒计时
startCountdown();
}
private void startCountdown() {
countDownTimer =new CountDownTimer(timeLeftInMillis,1000) {
@Override
public void onTick(long millisUntilFinished) {
timeLeftInMillis = millisUntilFinished;
int secondsRemaining = (int) (millisUntilFinished / 1000);
tvCountdown.setText(secondsRemaining +" s | 跳转");
}
@Override
public void onFinish() {
//跳转到登录页面（看自己逻辑想跳转哪个页面）
startActivity(new Intent(WelcomeActivity.this, MainActivity.class));
// 倒计时结束后的操作，例如跳转到主页面
finish();
}
}.start();
}
@Override
protected void onDestroy() {
super.onDestroy();
if (countDownTimer != null) {
countDownTimer.cancel();
}
}
}
- 首页实现
public class MainActivity extends AppCompatActivity {
// private String[] titles = {"娱乐", "军事", "教育", "文化", "将康", "财经", "体育", "汽车", "科技"};
private List<TitleInfo> titles = new ArrayList<>();
private TabLayout tab_layout;
private ViewPager2 viewPager;
private NavigationView nav_view;
private TextView tv_username;
private TextView tv_nickname;
private ImageView btn_open_drawerLayout;
private DrawerLayout drawer_layout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//初始化title数据
titles.add(new TitleInfo("推荐", "top"));
titles.add(new TitleInfo("国内", "guonei"));
titles.add(new TitleInfo("国际", "guoji"));
titles.add(new TitleInfo("娱乐", "yule"));
titles.add(new TitleInfo("体育", "tiyu"));
titles.add(new TitleInfo("军事", "junshi"));
titles.add(new TitleInfo("科技", "keji"));
titles.add(new TitleInfo("财经", "caijing"));
titles.add(new TitleInfo("游戏", "youxi"));
titles.add(new TitleInfo("汽车", "qiche"));
titles.add(new TitleInfo("健康", "jiankang"));
//初始化控件
tab_layout = findViewById(R.id.tab_layout);
viewPager = findViewById(R.id.viewPager);
nav_view = findViewById(R.id.nav_view);
btn_open_drawerLayout = findViewById(R.id.btn_open_drawerLayout);
drawer_layout = findViewById(R.id.drawer_layout);
//注意事项， 不能直接findViewById
// tv_username=findViewById(R.id.nav_view);
// tv_username = nav_view.getHeaderView(0).findViewById(R.id.tv_username);
tv_username = nav_view.getHeaderView(0).findViewById(R.id.tv_username);
tv_nickname = nav_view.getHeaderView(0).findViewById(R.id.tv_nickname);
//btn_open_drawerLayout打开抽屉
btn_open_drawerLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
drawer_layout.open();
}
});
//nav_view点击事件
nav_view.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
if (item.getItemId() == R.id.nav_history) {
//跳转到历史记录
Intent intent = new Intent(MainActivity.this, HistoryListActivity.class);
startActivity(intent);
} else if (item.getItemId() == R.id.nav_update_pwd) {
//判断是否登录
UserInfo userInfo = UserInfo.getUserInfo();
if (null != userInfo) {
startActivity(new Intent(MainActivity.this, UpdatePwdActivity.class));
} else {
Toast.makeText(MainActivity.this, "请先登录～～", Toast.LENGTH_SHORT).show();
}
} else if (item.getItemId() == R.id.nav_about) {
startActivity(new Intent(MainActivity.this, AboutActivity.class));
} else if (item.getItemId() == R.id.nav_exit) {
UserInfo userInfo = UserInfo.getUserInfo();
if (null!=userInfo){
new AlertDialog.Builder(MainActivity.this).setTitle("温馨提示").setMessage("确认要退出登录吗？").setPositiveButton("确认", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
startActivity(new Intent(MainActivity.this, LoginActivity.class));
UserInfo.setUserInfo(null);
}
}).setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
})
.show();
}else {
Toast.makeText(MainActivity.this, "请先登录～～", Toast.LENGTH_SHORT).show();
}
}
return true;
}
});
//viewPager 需要设置一个adapter
viewPager.setAdapter(new FragmentStateAdapter(this) {
@NonNull
@Override
public Fragment createFragment(int position) {
String title = titles.get(position).getPy_title();
TabNewsFragment tabNewsFragment = TabNewsFragment.newInstance(title);
return tabNewsFragment;
}
@Override
public int getItemCount() {
return titles.size();
}
});
//tab_layout点击事件
tab_layout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
//设置viewPager选中当前页
viewPager.setCurrentItem(tab.getPosition(), false);
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
//tab_layout和viewPager关联在一起
TabLayoutMediator tabLayoutMediator = new TabLayoutMediator(tab_layout, viewPager, new TabLayoutMediator.TabConfigurationStrategy() {
@Override
public void onConfigureTab(@NonNull TabLayout.Tab tab, int position) {
tab.setText(titles.get(position).getTitle());
}
});
//这句话一定不能少
tabLayoutMediator.attach();
}
@Override
protected void onResume() {
super.onResume();
UserInfo userInfo = UserInfo.getUserInfo();
if (null != userInfo) {
tv_username.setText(userInfo.getUsername());
tv_nickname.setText(userInfo.getNickname());
} else {
tv_username.setText("请登录");
tv_nickname.setText("");
//登录点击事件
tv_username.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, LoginActivity.class);
startActivity(intent);
}
});
}
}
}
- 新闻详情页
public class NewsDetailsActivity extends AppCompatActivity {
private NewsInfo.ResultDTO.DataDTO dataDTO;
private Toolbar toolbar;
private WebView mWebView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_news_details);
//初始化控件
toolbar = findViewById(R.id.toolbar);
mWebView = findViewById(R.id.webView);
//获取传递的数据
dataDTO = (NewsInfo.ResultDTO.DataDTO) getIntent().getSerializableExtra("dataDTO");
//设置数据
if (null != dataDTO) {
toolbar.setTitle(dataDTO.getTitle());
mWebView.loadUrl(dataDTO.getUrl());
//添加历史记录
String dataDTOJson = new Gson().toJson(dataDTO);
UserInfo userInfo = UserInfo.getUserInfo();
if (userInfo!=null){
HistoryDbHelper.getInstance(NewsDetailsActivity.this).addHistory(userInfo.getUsername(),dataDTO.getUniquekey(),dataDTOJson);
}else {
HistoryDbHelper.getInstance(NewsDetailsActivity.this).addHistory(null,dataDTO.getUniquekey(),dataDTOJson);
}
}
//返回
toolbar.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
finish();
}
});
}
}
