无法将某些数据传输到新页面

Question

我想在搜索布局部分的 android 项目中显示从 json 获得的数据，但数据不可见。你能帮帮我吗？

我的代码：

public void searchView (View view){
        FragmentManager fragmentManager = getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

        SearchFragment searchFragment = new SearchFragment();
        fragmentTransaction.replace(R.id.frameLayout, searchFragment).commit();

        enterButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {


                city = cityAdd.getEditText().getText().toString().trim();
                String url = "https://api.openweathermap.org/data/2.5/weather?q="+city+"&appid="+apikey;
                RequestQueue queue = Volley.newRequestQueue(getApplicationContext());
                JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET, url, null, new com.android.volley.Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject response) {

                        try {
                            Log.d("Temperature",(url));
                            JSONObject temps = response.getJSONObject("main");
                            String temperatures = temps.getString("temp");
                            country.setText(city);
                            temp.setText(temperatures);
                            Intent intent = new Intent(MainActivity.this, SearchFragment.class);
                            intent.putExtra("city", country.getText().toString());
                            intent.putExtra("temp",temp.getText().toString());
                            startActivity(intent);


                        } catch (JSONException e) {
                            Toast.makeText(MainActivity.this, e.getMessage(), Toast.LENGTH_SHORT).show();

                        }
                    }
                }, new com.android.volley.Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        Toast.makeText(MainActivity.this, "Please check the city name", Toast.LENGTH_SHORT).show();

                    }
                }

                );
                queue.add(request);

            }
        });

    }

搜索Fragment.java

package com.nisaefendioglu.weatherapp;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.SearchView;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;

public class SearchFragment extends Fragment {

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        ViewGroup viewGroup = (ViewGroup)inflater.inflate(R.layout.search_layout, container,false);
        TextView country = viewGroup.findViewById(R.id.country);
        TextView temp = viewGroup.findViewById(R.id.temp);
        TextView back = viewGroup.findViewById(R.id.back);

        return viewGroup;



    }




}

XML 国家项目

        <?xml version="1.0" encoding="utf-8"?>
        <com.google.android.material.card.MaterialCardView xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        app:cardElevation="3dp"
        android:layout_marginHorizontal="8dp"
        android:layout_marginTop="8dp">
        
       <RelativeLayout
       android:id="@+id/relativeLayout"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:layout_marginVertical="7dp"
       android:layout_marginHorizontal="15dp">
        
        
       <TextView
            
    
    android:id="@+id/countryName"
    android:layout_width="wrap_content"
     android:layout_height="40dp"
     android:layout_alignParentStart="true"
     android:layout_marginEnd="30dp"
     android:textColor="@color/black"
     android:text="Türkiye"
     android:layout_centerVertical="true"
     android:gravity="center"
      android:textSize="15dp" ></TextView>
    
     <TextView
     android:id="@+id/temperature"
    android:layout_width="wrap_content"
     android:layout_height="40dp"
    android:layout_alignParentEnd="true"
     android:layout_marginEnd="30dp"
      android:textColor="@color/black"
      android:text="Temperature"
       android:layout_centerVertical="true"
      android:gravity="center"
     android:textSize="15dp" ></TextView>
        
      </RelativeLayout>
      </com.google.android.material.card.MaterialCardView>
    



Main xml
        <?xml version="1.0" encoding="utf-8"?>
        <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:app="http://schemas.android.com/apk/res-auto"
            xmlns:tools="http://schemas.android.com/tools"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            tools:context=".MainActivity"
            android:orientation="vertical">
        
            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginVertical="12dp"
                >
        
            <EditText
                android:layout_width="270dp"
                android:layout_height="wrap_content"
                android:layout_marginStart="10dp"
                android:hint="Enter City" />
            <Button
                android:onClick="searchView"
                android:id="@+id/enterButton"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginStart="300dp"
                android:text="Enter"
                android:textAllCaps="false"
                />
            </RelativeLayout>
        
            <ImageView
                android:id="@+id/image"
                android:layout_width="match_parent"
                android:layout_height="200dp"
                android:src="@drawable/weather"/>
        
            <RelativeLayout
                android:id="@+id/activityRelative"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginVertical="12dp"
                >
        
                <TextView
                    android:id="@+id/text1"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentStart="true"
                    android:layout_marginStart="30dp"
                    android:textColor="@color/black"
                    android:text="Country Name"
                    android:textSize="15dp" ></TextView>
        
        
                <TextView
                    android:id="@+id/text2"
                    android:layout_width="wrap_content"
                    android:layout_height="40dp"
                    android:layout_alignParentEnd="true"
                    android:layout_marginEnd="30dp"
                    android:text="Temperature"
                    android:textColor="@color/black"
                    android:textSize="15dp" ></TextView>
        
            </RelativeLayout>
        
        <FrameLayout
            android:id="@+id/frameLayout"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">
        
            <androidx.recyclerview.widget.RecyclerView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/countries"
                tools:listitem="@layout/country_item_layout"
                app:layoutManager="LinearLayoutManager"
                />
        
        
        </FrameLayout>
        </LinearLayout>
    
    
    Search Layout
    
        <?xml version="1.0" encoding="utf-8"?>
        <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="match_parent"
            android:orientation="vertical"
            android:layout_height="match_parent">
        
        
                <TextView
                    android:id="@+id/country"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentStart="true"
                    android:layout_marginStart="30dp"
                    android:textColor="@color/black"
                    android:text=""
                    android:textSize="15dp" ></TextView>
        
        
                <TextView
                    android:id="@+id/temp"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
       android:layout_alignParentEnd="true"
     android:layout_marginEnd="30dp"
      android:text=""
    android:textColor="@color/black"
       android:textSize="15dp" ></TextView>
     <TextView
      android:onClick="tempBack"
       android:id="@+id/back"
      android:layout_width="50dp"
      android:layout_height="50dp"
     android:layout_gravity="left"
        android:layout_marginLeft="20dp"
        android:layout_marginTop="200dp"
       android:gravity="center"
        android:text="←"
      android:textColor="#ff793f"
      android:textSize="40dp"></TextView>
        
        
     </LinearLayout>

您好，我想在搜索布局部分的 android 项目中显示从 json 获得的数据，但是数据不可见。你能帮帮我吗？

Answer 1

您正在主 activity 中检索数据并通过您的意图发送数据

intent.putExtra("city", country.getText().toString()); intent.putExtra("temp",temp.getText().toString());

但是，您没有获取通过片段中的意图发送的数据。您必须根据发送的键值来获取它们。在片段中的 onCreateView() 中，您可以通过以下形式获取通过意图发送的每个数据：

String city = getArguments().getString("city");

无法将某些数据传输到新页面

unable to transfer some data to a new page

java

api

android

input

android-intent