I'm working on a project where I created an API where I can get trends from twitter based on user's entered location. Now I want to call that API in android. It looks like:

I want to show the GET Trends here: Get Trends Layout:

   <RelativeLayout 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"
        android:background="@color/white"
        tools:context=".trends">
    
        <TextView
            android:id="@ id/profiletitle"
            android:layout_width="310dp"
            android:layout_height="46dp"
            android:layout_alignParentTop="true"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="52dp"
            android:fontFamily="monospace"
            android:text="Today's Trends"
            android:textAlignment="center"
            android:textColor="@color/Twit"
            android:textSize="25sp"
            android:textStyle="bold"
            tools:layout_editor_absoluteX="48dp"
            tools:layout_editor_absoluteY="29dp" />
    
        <EditText
            android:id="@ id/locationid"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentStart="true"
            android:layout_alignParentTop="true"
            android:layout_centerHorizontal="true"
            android:layout_marginStart="105dp"
            android:layout_marginTop="133dp"
            android:ems="10"
            android:hint="Enter your country"
            android:inputType="textPersonName" />
    
        <Button
            android:id="@ id/getdata"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="216dp"
            android:text="Get Trends" />
    
        <FrameLayout
            android:id="@ id/showtrends"
            android:layout_width="360dp"
            android:layout_height="492dp"
            android:layout_alignParentTop="true"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="310dp">
    
        </FrameLayout>
    
    
</RelativeLayout>

I need your help to tell me how to do it in kotlin. I have searched many times but failed to find the solution where I can pass my Country parameter from andriod to API and then get the json results. Your Answer will be highly appreciated.

My Response Body I want to display:

CodePudding user response：

Please try once and make JSON as per your requirement and other related changes like clear textview on each click etc... -

XML FILE

<androidx.appcompat.widget.LinearLayoutCompat xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white"
    android:gravity="center|top"
    android:orientation="vertical">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="52dp"
        android:fontFamily="monospace"
        android:text="Today's Trends"
        android:textAlignment="center"
        android:textSize="25sp"
        android:textStyle="bold" />

    <EditText
        android:id="@ id/locationid"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="20dp"
        android:ems="10"
        android:hint="Enter your country"
        android:inputType="text" />

    <Button
        android:id="@ id/getData"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="20dp"
        android:text="Get Trends" />

    <TextView
        android:id="@ id/showData"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="10dp"
        android:textSize="15sp" />
 
</androidx.appcompat.widget.LinearLayoutCompat>

Class file-

    public class MainActivity4 extends AppCompatActivity implements View.OnClickListener {
        Button getData;
        EditText locationId;
        TextView showData;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main4);
            locationId = findViewById(R.id.locationid);
            showData = findViewById(R.id.showData);
            getData = findViewById(R.id.getData);
            getData.setOnClickListener(this);
        }
    
        @SuppressLint("SetTextI18n")
        @Override
        public void onClick(View view) {
            int id = view.getId();
            if (id == R.id.getData) {
                String location = locationId.getText().toString().trim();
showData.setText("");
                if (location.isEmpty()) {
                    Toast.makeText(getApplicationContext(), "Please add Country", Toast.LENGTH_LONG).show();
                    return;
                }
    
                RequestQueue requestQueue;
                requestQueue = Volley.newRequestQueue(getApplicationContext());
                @SuppressLint("SetTextI18n") JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.GET,
                        "https://twtsentiment-fastapi.herokuapp.com/get_trend?loc="   location,
                        null, response -> {
                    Log.d("Response", response.toString());
    
                    try {
                        JSONArray jsonArray = response.getJSONArray("Trends");
                        for (int i = 0; i < jsonArray.length(); i  ) {
                            showData.append("\n " jsonArray.optString(i) "\n ");
                            Log.d("TEXT", jsonArray.optString(i));
                        }
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
    
                }, error -> Log.d("myapp", "something went wrong"));
                requestQueue.add(jsonObjectRequest);
            }
        }
    }