本文實例為大家分享了Android購物分類效果展示的具體代碼，供大家參考，具體內容如下
SecondActivity.java
public class SecondActivity extends AppCompatActivity{ private ViewPager mPager; private RadioGroup mRadioGroup; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.second); mPager = findViewById(R.id.pager); mRadioGroup = findViewById(R.id.group); mPager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) { @Override public Fragment getItem(int position) { Fragment fragment=null; switch (position){ case 0: fragment = new Afrag(); break; case 1: fragment = new Bfrag(); break; case 2: fragment = new Cfrag(); break; } return fragment; } @Override public int getCount() { return 3; } }); mRadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() { @Override public void onCheckedChanged(RadioGroup radioGroup, int i) { switch (i){ case R.id.r1: mPager.setCurrentItem(0); break; case R.id.r2: mPager.setCurrentItem(1); break; case R.id.r3: mPager.setCurrentItem(2); break; } } }); }}secondActivity.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <android.support.v4.view.ViewPager android:id="@+id/pager" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="13"/> <RadioGroup android:id="@+id/group" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_weight="1" android:orientation="horizontal"> <RadioButton android:id="@+id/r1" android:layout_width="wrap_content" android:layout_weight="1" android:layout_height="match_parent" android:button="@null" android:gravity="center" android:text="首頁"/> <RadioButton android:id="@+id/r2" android:layout_width="wrap_content" android:layout_weight="1" android:layout_height="match_parent" android:button="@null" android:gravity="center" android:text="分類"/> <RadioButton android:id="@+id/r3" android:layout_width="wrap_content" android:layout_weight="1" android:layout_height="match_parent" android:button="@null" android:gravity="center" android:text="購物車"/> </RadioGroup></LinearLayout>
Afrag.java
public class Afrag extends Fragment{ private RecyclerView mRecyclerView; public String urlString="http://www.wanandroid.com/tools/mockapi/6523/restaurants_offset_0_limit_4 "; @Nullable @Override public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View view = View.inflate(getActivity(), R.layout.afrag, null); mRecyclerView = view.findViewById(R.id.rv); initData(); return view; } private void initData() { OkHttps okHttps = OkHttps.getInstance(); okHttps.doGet(urlString, new OkHttps.OkCallback() { @Override public void onResponse(String json) { //瀑布流 PubuBean pubuBean = new Gson().fromJson(json,PubuBean.class); List<PubuBean.DataBean> results = pubuBean.getData(); PubuAdapter pubuAdapter = new PubuAdapter(getActivity()); pubuAdapter.setDatas(results); mRecyclerView.setAdapter(pubuAdapter); StaggeredGridLayoutManager manager = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL); mRecyclerView.setLayoutManager(manager); } @Override public void onFailure(Exception e) { } }); }}afrag.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <android.support.v7.widget.RecyclerView android:id="@+id/rv" android:layout_width="match_parent" android:layout_height="match_parent"/></LinearLayout>
PubuAdapter.java
public class PubuAdapter extends RecyclerView.Adapter<PubuAdapter.ViewHolder>{ private Context mContext; ArrayList<PubuBean.DataBean> list; public PubuAdapter(Context context) { mContext = context; list = new ArrayList<>(); } public void setDatas(List<PubuBean.DataBean> datas) { list.addAll(datas); } @NonNull @Override public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { View view = View.inflate(mContext, R.layout.pbitem, null); ViewHolder holder = new ViewHolder(view); return holder; } @Override public void onBindViewHolder(@NonNull ViewHolder holder, int position) { holder.mTextView.setText(list.get(position).getName()); Glide.with(mContext).load(list.get(position).getPic_url()).into(holder.mImageView); } @Override public int getItemCount() { return list.size(); } public class ViewHolder extends RecyclerView.ViewHolder { ImageView mImageView; TextView mTextView; public ViewHolder(View itemView) { super(itemView); mImageView = itemView.findViewById(R.id.image); mTextView = itemView.findViewById(R.id.t1); } }}Bfrag.java
public class Bfrag extends Fragment{ private RecyclerView mRecyclerView; LeftAdapter adapter; String urlString="http://www.zhaoapi.cn/product/getCatagory"; String urlString2="http://www.zhaoapi.cn/product/getProductCatagory"; private RecyclerView mRecyclerView2; @Nullable @Override public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View view = View.inflate(getActivity(), R.layout.bfrag, null);//分類頁面 mRecyclerView = view.findViewById(R.id.rv1); //左側列表 mRecyclerView2 = view.findViewById(R.id.rv2); //右 initData(); return view; } private void initData() { OkHttps okHttps = OkHttps.getInstance(); okHttps.doGet(urlString, new OkHttps.OkCallback() { @Override public void onResponse(String json) { //瀑布流 LeftBean leftBean = new Gson().fromJson(json,LeftBean.class); List<LeftBean.DataBean> results = leftBean.getData(); adapter = new LeftAdapter(getActivity()); adapter.setDatas(results); mRecyclerView.setAdapter(adapter); mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity(),LinearLayoutManager.VERTICAL,false)); adapter.setOnItemClickListener(new LeftAdapter.OnItemClickListener() { @Override public void onItemClick(int position) { //Toast.makeText(getActivity(),position+"",Toast.LENGTH_SHORT).show(); rigth(position); } }); } @Override public void onFailure(Exception e) { } }); } public void rigth(int position){ HashMap<String, String> map = new HashMap<>(); map.put("cid",position+1+""); OkHttps.getInstance().doPost(urlString2,map,new OkHttps.OkCallback() { @Override public void onResponse(String json) { RightBean rightBean = new Gson().fromJson(json,RightBean.class); List<RightBean.DataBean> results = rightBean.getData(); RightAdapter rightAdapter = new RightAdapter(getActivity()); rightAdapter.setDatas(results); mRecyclerView2.setAdapter(rightAdapter); mRecyclerView2.setLayoutManager(new GridLayoutManager(getActivity(),3)); } @Override public void onFailure(Exception e) { } }); }}bfrag.xml
<android.support.v7.widget.RecyclerView android:id="@+id/rv1" android:layout_width="0dp" android:layout_weight="2" android:layout_height="match_parent"/> <android.support.v7.widget.RecyclerView android:id="@+id/rv2" android:layout_width="0dp" android:layout_weight="10" android:layout_height="match_parent"/></LinearLayout>
LeftAdapter.java
public class LeftAdapter extends RecyclerView.Adapter<LeftAdapter.ViewHolder>{ private Context mContext; ArrayList<LeftBean.DataBean> list; public LeftAdapter(Context context) { mContext = context; list = new ArrayList<>(); } public void setDatas(List<LeftBean.DataBean> datas) { list.addAll(datas); } public interface OnItemClickListener{ //自定義接口回調設置點擊事件 void onItemClick(int position); } private OnItemClickListener mOnItemClickListener; public void setOnItemClickListener(OnItemClickListener onItemClickListener){ mOnItemClickListener=onItemClickListener; } @NonNull @Override public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { View view = View.inflate(mContext, R.layout.leftitem, null); ViewHolder holder = new ViewHolder(view); return holder; } @Override public void onBindViewHolder(@NonNull final ViewHolder holder, int position) { holder.mTextView.setText(list.get(position).getName()); holder.itemView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { int position1 = holder.getLayoutPosition(); mOnItemClickListener.onItemClick(position1); } }); } @Override public int getItemCount() { return list.size(); } public class ViewHolder extends RecyclerView.ViewHolder { TextView mTextView; public ViewHolder(View itemView) { super(itemView); mTextView = itemView.findViewById(R.id.text1); } }}RightAdapter.java
public class RightAdapter extends RecyclerView.Adapter<RightAdapter.ViewHolder>{ private Context mContext; ArrayList<RightBean.DataBean> list; public RightAdapter(Context context) { mContext = context; list = new ArrayList<>(); } public void setDatas(List<RightBean.DataBean> datas) { list.addAll(datas); } @NonNull @Override public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { View view = View.inflate(mContext, R.layout.rightitem, null); ViewHolder holder = new ViewHolder(view); return holder; } @Override public void onBindViewHolder(@NonNull ViewHolder holder, int position) { holder.mTextView.setText(list.get(position).getName()); Glide.with(mContext).load(list.get(position).getList().get(position).getIcon()).into(holder.mImageView); } @Override public int getItemCount() { return list.size(); } public class ViewHolder extends RecyclerView.ViewHolder { ImageView mImageView; TextView mTextView; public ViewHolder(View itemView) { super(itemView); mImageView = itemView.findViewById(R.id.image1); mTextView = itemView.findViewById(R.id.text2); } }}OkHttps.java
public class OkHttps { Handler handler; private final OkHttpClient mOkHttpClient; private static OkHttps mOkHttps; private OkHttps() { handler = new Handler(Looper.getMainLooper()); LoggingInterceptor loggingInterceptor = new LoggingInterceptor(); //日志攔截器 mOkHttpClient = new OkHttpClient.Builder() .addInterceptor(loggingInterceptor) //設置日志攔截器 .connectTimeout(5000, TimeUnit.MILLISECONDS) .readTimeout(5000,TimeUnit.MILLISECONDS) .writeTimeout(5000,TimeUnit.MILLISECONDS) .build(); } public static OkHttps getInstance(){ if (mOkHttps==null){ synchronized (OkHttps.class){ if (mOkHttps==null){ return mOkHttps=new OkHttps(); } } } return mOkHttps; } public interface OkCallback{ void onResponse(String json); void onFailure(Exception e); } public void doPost(String url, Map<String,String> map, final OkCallback okCallback){ FormBody.Builder builder = new FormBody.Builder(); if (map!=null){ for (String key:map.keySet()){ builder.add(key,map.get(key)); } } FormBody formBody = builder.build(); final Request request = new Request.Builder() .post(formBody) .url(url) .build(); Call call = mOkHttpClient.newCall(request); call.enqueue(new Callback() { @Override public void onFailure(Call call, final IOException e) { if (okCallback!=null){ handler.post(new Runnable() { @Override public void run() { okCallback.onFailure(e); } }); } } @Override public void onResponse(Call call, Response response) throws IOException { try { if (response!=null && response.isSuccessful()){ final String json = response.body().string(); handler.post(new Runnable() { @Override public void run() { if (okCallback!=null){ okCallback.onResponse(json); return; } } }); } }catch (IOException e){ e.printStackTrace(); } if (okCallback!=null){ okCallback.onFailure(new Exception("網絡異常")); } } }); } public void doGet(String url, final OkCallback okCallback){ Request request = new Request.Builder() .url(url) .build(); Call call = mOkHttpClient.newCall(request); call.enqueue(new Callback() { @Override public void onFailure(Call call, final IOException e) { if (okCallback != null) { //切換到主線程 handler.post(new Runnable() { @Override public void run() { okCallback.onFailure(e); } }); } } @Override public void onResponse(Call call, Response response) throws IOException { try { if (response != null && response.isSuccessful()) { final String json = response.body().string(); handler.post(new Runnable() { @Override public void run() { if (okCallback != null) { okCallback.onResponse(json); } } }); } } catch (IOException e) { e.printStackTrace(); } } }); }}依賴
implementation 'com.google.code.gson:gson:2.8.5' implementation 'com.squareup.okhttp3:okhttp:3.12.0' implementation 'com.android.support:recyclerview-v7:27.1.1' implementation 'com.github.bumptech.glide:glide:3.7.0'
LoggingInterceptor.java //攔截器
class LoggingInterceptor implements Interceptor { @Override public Response intercept(Chain chain) throws IOException { //拿到Request對象 Request request = chain.request(); long t1 = System.nanoTime(); System.out.println(" request = " + String.format("Sending request %s on %s%n%s", request.url(), chain.connection(), request.headers())); //拿到Response對象 Response response = chain.proceed(request); long t2 = System.nanoTime(); //得出請求網絡,到得到結果,中間消耗了多長時間 System.out.println("response " + String.format("Received response for %s in %.1fms%n%s", response.request().url(), (t2 - t1) / 1e6d, response.headers())); return response; }}以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持VEVB武林網。
新聞熱點
疑難解答
