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Javascript 向my API提供关键字时接收空白页

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Javascript 向my API提供关键字时接收空白页,javascript,json,api,rest,android-studio,Javascript,Json,Api,Rest,Android Studio,我正在开发一个使用新闻api检索新闻的应用程序 当我向API提供关键字作为参数时，我的页面是空白的，但如果我不提供任何关键字（即关键字的大小为0），我仍然可以获取最新的新闻。我做错了什么。下面提供了相应的代码 您可以参考此处的文档： Apiclient: package com.example.nvirone.API; import java.security.cert.CertificateException; import javax.net.ssl.HostnameVerifier;

我正在开发一个使用新闻api检索新闻的应用程序

当我向API提供关键字作为参数时，我的页面是空白的，但如果我不提供任何关键字（即关键字的大小为0），我仍然可以获取最新的新闻。我做错了什么。下面提供了相应的代码

您可以参考此处的文档：

Apiclient:

package com.example.nvirone.API;

import java.security.cert.CertificateException;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import okhttp3.OkHttpClient;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;

public class ApiClient {
    public static final String BaseURL = "https://newsapi.org/v2/";
    public static Retrofit retrofit ;

    public static Retrofit getApiClient(){
        if(retrofit==null){
            retrofit = new Retrofit.Builder().baseUrl(BaseURL).client(getUnsafeOkHttpClient().build()).addConverterFactory(GsonConverterFactory.create()).build();
        }
        return retrofit;
    }
    public static OkHttpClient.Builder getUnsafeOkHttpClient(){
        try {
            // Create a trust manager that does not validate certificate chains
            final TrustManager[] trustAllCerts = new TrustManager[]{
                    new X509TrustManager() {
                        @Override
                        public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
                        }

                        @Override
                        public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
                        }

                        @Override
                        public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                            return new java.security.cert.X509Certificate[]{};
                        }
                    }
            };

            // Install the all-trusting trust manager
            final SSLContext sslContext = SSLContext.getInstance("SSL");
            sslContext.init(null, trustAllCerts, new java.security.SecureRandom());

            // Create an ssl socket factory with our all-trusting manager
            final SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();

            OkHttpClient.Builder builder = new OkHttpClient.Builder();
            builder.sslSocketFactory(sslSocketFactory, (X509TrustManager) trustAllCerts[0]);
            builder.hostnameVerifier(new HostnameVerifier() {
                @Override
                public boolean verify(String hostname, SSLSession session) {
                    return true;
                }
            });
            return builder;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

}

package com.example.nvirone;

import android.os.Bundle;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.DefaultItemAnimator;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.example.nvirone.API.ApiClient;
import com.example.nvirone.API.ApiInterface;
import com.example.nvirone.Models.Article;
import com.example.nvirone.Models.News;

import java.util.ArrayList;
import java.util.List;

import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

public class Newspage extends AppCompatActivity {
    public static final String API_KEY = "d8f92a1633724e958542f54458f9f23f";
    private RecyclerView recyclerView;
    private Adapter adapter;
    private RecyclerView.LayoutManager layoutManager;
    private List<Article> articles = new ArrayList<>();
    private String TAG = Newspage.class.getSimpleName();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_newspage);
        recyclerView = findViewById(R.id.recyclerView);
        layoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(layoutManager);
        adapter = new Adapter(articles, Newspage.this);
        recyclerView.setAdapter(adapter);
        recyclerView.setItemAnimator(new DefaultItemAnimator());
        recyclerView.setNestedScrollingEnabled(false);
        LoadJson("");
    }
public void LoadJson(final String keyword){
    ApiInterface apiInterface = ApiClient.getApiClient().create(ApiInterface.class);
    String country = Utils.getCountry();
    String language = Utils.getLanguage();

    Call<News> call;

    if (keyword.length()>1){
        call = apiInterface.getNewsSearch(keyword,language,"publishedAt",API_KEY);
    }
    else{
        call = apiInterface.getNews(country, API_KEY);
    }
    call.enqueue(new Callback<News>() {
        @Override
        public void onResponse(Call<News> call, Response<News> response) {
            List<Article> newArticles = response.body().getArticle();
            if (response.isSuccessful() && newArticles!=null){
                adapter.addArticles(newArticles);
            }
        }

        @Override
        public void onFailure(Call<News> call, Throwable t) {
            Toast.makeText(Newspage.this,"NO result",Toast.LENGTH_LONG).show();
        }
    });
    }
}

package com.example.nvirone.API;

import com.example.nvirone.Models.News;

import retrofit2.Call;
import retrofit2.http.GET;
import retrofit2.http.Query;

public interface ApiInterface {
    @GET("top-headlines")
    Call<News> getNews(

            @Query("country") String country,
            @Query("apiKey") String apiKey
    );
    @GET("everything")
    Call<News> getNewsSearch(

        @Query("q") String Keyword,
        @Query("language") String language,
        @Query("SortBy") String sortBy,
        @Query("apiKey") String apiKey

        );
}
新闻页面：

package com.example.nvirone.API;

import java.security.cert.CertificateException;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import okhttp3.OkHttpClient;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;

public class ApiClient {
    public static final String BaseURL = "https://newsapi.org/v2/";
    public static Retrofit retrofit ;

    public static Retrofit getApiClient(){
        if(retrofit==null){
            retrofit = new Retrofit.Builder().baseUrl(BaseURL).client(getUnsafeOkHttpClient().build()).addConverterFactory(GsonConverterFactory.create()).build();
        }
        return retrofit;
    }
    public static OkHttpClient.Builder getUnsafeOkHttpClient(){
        try {
            // Create a trust manager that does not validate certificate chains
            final TrustManager[] trustAllCerts = new TrustManager[]{
                    new X509TrustManager() {
                        @Override
                        public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
                        }

                        @Override
                        public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
                        }

                        @Override
                        public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                            return new java.security.cert.X509Certificate[]{};
                        }
                    }
            };

            // Install the all-trusting trust manager
            final SSLContext sslContext = SSLContext.getInstance("SSL");
            sslContext.init(null, trustAllCerts, new java.security.SecureRandom());

            // Create an ssl socket factory with our all-trusting manager
            final SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();

            OkHttpClient.Builder builder = new OkHttpClient.Builder();
            builder.sslSocketFactory(sslSocketFactory, (X509TrustManager) trustAllCerts[0]);
            builder.hostnameVerifier(new HostnameVerifier() {
                @Override
                public boolean verify(String hostname, SSLSession session) {
                    return true;
                }
            });
            return builder;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

}

package com.example.nvirone;

import android.os.Bundle;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.DefaultItemAnimator;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.example.nvirone.API.ApiClient;
import com.example.nvirone.API.ApiInterface;
import com.example.nvirone.Models.Article;
import com.example.nvirone.Models.News;

import java.util.ArrayList;
import java.util.List;

import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

public class Newspage extends AppCompatActivity {
    public static final String API_KEY = "d8f92a1633724e958542f54458f9f23f";
    private RecyclerView recyclerView;
    private Adapter adapter;
    private RecyclerView.LayoutManager layoutManager;
    private List<Article> articles = new ArrayList<>();
    private String TAG = Newspage.class.getSimpleName();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_newspage);
        recyclerView = findViewById(R.id.recyclerView);
        layoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(layoutManager);
        adapter = new Adapter(articles, Newspage.this);
        recyclerView.setAdapter(adapter);
        recyclerView.setItemAnimator(new DefaultItemAnimator());
        recyclerView.setNestedScrollingEnabled(false);
        LoadJson("");
    }
public void LoadJson(final String keyword){
    ApiInterface apiInterface = ApiClient.getApiClient().create(ApiInterface.class);
    String country = Utils.getCountry();
    String language = Utils.getLanguage();

    Call<News> call;

    if (keyword.length()>1){
        call = apiInterface.getNewsSearch(keyword,language,"publishedAt",API_KEY);
    }
    else{
        call = apiInterface.getNews(country, API_KEY);
    }
    call.enqueue(new Callback<News>() {
        @Override
        public void onResponse(Call<News> call, Response<News> response) {
            List<Article> newArticles = response.body().getArticle();
            if (response.isSuccessful() && newArticles!=null){
                adapter.addArticles(newArticles);
            }
        }

        @Override
        public void onFailure(Call<News> call, Throwable t) {
            Toast.makeText(Newspage.this,"NO result",Toast.LENGTH_LONG).show();
        }
    });
    }
}

package com.example.nvirone.API;

import com.example.nvirone.Models.News;

import retrofit2.Call;
import retrofit2.http.GET;
import retrofit2.http.Query;

public interface ApiInterface {
    @GET("top-headlines")
    Call<News> getNews(

            @Query("country") String country,
            @Query("apiKey") String apiKey
    );
    @GET("everything")
    Call<News> getNewsSearch(

        @Query("q") String Keyword,
        @Query("language") String language,
        @Query("SortBy") String sortBy,
        @Query("apiKey") String apiKey

        );
}

package com.example.nvirone；
导入android.os.Bundle；
导入android.widget.Toast；
导入androidx.appcompat.app.appcompat活动；
导入androidx.recyclerview.widget.DefaultItemAnimator；
导入androidx.recyclerview.widget.LinearLayoutManager；
导入androidx.recyclerview.widget.recyclerview；
导入com.example.nvirone.API.ApiClient；
导入com.example.nvirone.API.API接口；
导入com.example.nvirone.Models.Article；
导入com.example.nvirone.Models.News；
导入java.util.ArrayList；
导入java.util.List；
2.电话;；
2.回拨；
2.回应;；
公共类新闻页扩展了AppCompatActivity{
公共静态最终字符串API_KEY=“d8f92a1633724e958542f54458f9f23f”；
私人回收站；
专用适配器；
private RecyclerView.LayoutManager LayoutManager；
private List articles=new ArrayList（）；
私有字符串标记=Newspage.class.getSimpleName（）；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_新闻页面）；
recyclerView=findViewById（R.id.recyclerView）；
layoutManager=新的LinearLayoutManager（此）；
recyclerView.setLayoutManager（layoutManager）；
adapter=新适配器（文章、新闻页。此）；
recyclerView.setAdapter（适配器）；
setItemAnimator（新的DefaultItemAnimator（））；
recyclerView.setNestedScrollingEnabled（false）；
LoadJson（“”）；
}
public void LoadJson（最终字符串关键字）{
ApiInterface ApiInterface=ApiClient.getApiClient（）.create（ApiInterface.class）；
字符串country=Utils.getCountry（）；
String language=Utils.getLanguage（）；
呼叫呼叫；
if（关键字.length（）>1）{
call=apiInterface.getNewsSearch（关键字，语言，“publishedAt”，API_键）；
}
否则{
call=apinterface.getNews（国家，API_键）；
}
call.enqueue（新回调（）{
@凌驾
公共void onResponse（调用、响应）{
List newArticles=response.body（）.getArticle（）；
if（response.issusccessful（）&&newArticles！=null）{
adapter.addArticles（newArticles）；
}
}
@凌驾
失败时公共无效（调用调用，可丢弃的t）{
Toast.makeText（Newspage.this，“无结果”，Toast.LENGTH_LONG.show（）；
}
});
}
}
API接口：

package com.example.nvirone.API;

import java.security.cert.CertificateException;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import okhttp3.OkHttpClient;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;

public class ApiClient {
    public static final String BaseURL = "https://newsapi.org/v2/";
    public static Retrofit retrofit ;

    public static Retrofit getApiClient(){
        if(retrofit==null){
            retrofit = new Retrofit.Builder().baseUrl(BaseURL).client(getUnsafeOkHttpClient().build()).addConverterFactory(GsonConverterFactory.create()).build();
        }
        return retrofit;
    }
    public static OkHttpClient.Builder getUnsafeOkHttpClient(){
        try {
            // Create a trust manager that does not validate certificate chains
            final TrustManager[] trustAllCerts = new TrustManager[]{
                    new X509TrustManager() {
                        @Override
                        public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
                        }

                        @Override
                        public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
                        }

                        @Override
                        public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                            return new java.security.cert.X509Certificate[]{};
                        }
                    }
            };

            // Install the all-trusting trust manager
            final SSLContext sslContext = SSLContext.getInstance("SSL");
            sslContext.init(null, trustAllCerts, new java.security.SecureRandom());

            // Create an ssl socket factory with our all-trusting manager
            final SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();

            OkHttpClient.Builder builder = new OkHttpClient.Builder();
            builder.sslSocketFactory(sslSocketFactory, (X509TrustManager) trustAllCerts[0]);
            builder.hostnameVerifier(new HostnameVerifier() {
                @Override
                public boolean verify(String hostname, SSLSession session) {
                    return true;
                }
            });
            return builder;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

}

package com.example.nvirone;

import android.os.Bundle;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.DefaultItemAnimator;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.example.nvirone.API.ApiClient;
import com.example.nvirone.API.ApiInterface;
import com.example.nvirone.Models.Article;
import com.example.nvirone.Models.News;

import java.util.ArrayList;
import java.util.List;

import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

public class Newspage extends AppCompatActivity {
    public static final String API_KEY = "d8f92a1633724e958542f54458f9f23f";
    private RecyclerView recyclerView;
    private Adapter adapter;
    private RecyclerView.LayoutManager layoutManager;
    private List<Article> articles = new ArrayList<>();
    private String TAG = Newspage.class.getSimpleName();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_newspage);
        recyclerView = findViewById(R.id.recyclerView);
        layoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(layoutManager);
        adapter = new Adapter(articles, Newspage.this);
        recyclerView.setAdapter(adapter);
        recyclerView.setItemAnimator(new DefaultItemAnimator());
        recyclerView.setNestedScrollingEnabled(false);
        LoadJson("");
    }
public void LoadJson(final String keyword){
    ApiInterface apiInterface = ApiClient.getApiClient().create(ApiInterface.class);
    String country = Utils.getCountry();
    String language = Utils.getLanguage();

    Call<News> call;

    if (keyword.length()>1){
        call = apiInterface.getNewsSearch(keyword,language,"publishedAt",API_KEY);
    }
    else{
        call = apiInterface.getNews(country, API_KEY);
    }
    call.enqueue(new Callback<News>() {
        @Override
        public void onResponse(Call<News> call, Response<News> response) {
            List<Article> newArticles = response.body().getArticle();
            if (response.isSuccessful() && newArticles!=null){
                adapter.addArticles(newArticles);
            }
        }

        @Override
        public void onFailure(Call<News> call, Throwable t) {
            Toast.makeText(Newspage.this,"NO result",Toast.LENGTH_LONG).show();
        }
    });
    }
}

package com.example.nvirone.API;

import com.example.nvirone.Models.News;

import retrofit2.Call;
import retrofit2.http.GET;
import retrofit2.http.Query;

public interface ApiInterface {
    @GET("top-headlines")
    Call<News> getNews(

            @Query("country") String country,
            @Query("apiKey") String apiKey
    );
    @GET("everything")
    Call<News> getNewsSearch(

        @Query("q") String Keyword,
        @Query("language") String language,
        @Query("SortBy") String sortBy,
        @Query("apiKey") String apiKey

        );
}

package com.example.nvirone.API；
导入com.example.nvirone.Models.News；
2.电话;；
导入文件2.http.GET；
导入2.http.Query；
公共接口{
@获取（“头条新闻”）
打电话给getNews(
@查询（“国家”）字符串国家，
@查询（“apiKey”）字符串apiKey
);
@获得（“一切”）
调用getNewsSearch(
@查询（“q”）字符串关键字，
@查询（“语言”）字符串语言，
@查询（“SortBy”）字符串SortBy，
@查询（“apiKey”）字符串apiKey
);
}
我认为问题出在新闻页面上，但不知道是什么