如何从包中创建ListView？

Question

Intent intent = new Intent(LoginActivity.this,LoginSuccess.class);

Bundle bundle = new Bundle()
bundle.putString("first_name",jsonObject.getString("first_name"));
bundle.putString("last_name",jsonObject.getString("last_name"));
bundle.putString("username",jsonObject.getString("username"));
bundle.putString("email",jsonObject.getString("email"));
bundle.putString("mobile",jsonObject.getString("mobile"));
bundle.putString("appointments",jsonObject.getString("appointments"));

intent.putExtras(bundle);
startActivity(intent);

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    super.onCreate(savedInstanceState);
    Bundle bundle = getActivity().getIntent().getExtras();
    View v = inflater.inflate(R.layout.fragment_appointments, container, false);
    String [] datasource = {"appointments", bundle.getString("appointments")};
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), R.layout.rowlayout, R.id.txtitem, datasource);
    setListAdapter(adapter);
    setRetainInstance(true);

    Log.d("appointments", bundle.getString("appointments"));
    View appointment_date = v.findViewById(R.id.appointment_date);
    ((TextView)appointment_date).setText(bundle.getString("appointment_date"));
    return v;
}

`公共类LoginSuccess扩展AppCompatActivity{Toolbar Toolbar；TabLayout TabLayout；ViewPager ViewPager；ViewPagerAdapter ViewPagerAdapter；

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login_success);
    toolbar = (Toolbar)findViewById(R.id.toolBar);
    setSupportActionBar(toolbar);
    tabLayout = (TabLayout)findViewById(R.id.tabLayout);
    viewPager = (ViewPager)findViewById(R.id.viewPager);
    viewPagerAdapter = new ViewPagerAdapter(getSupportFragmentManager());
    viewPagerAdapter.addFragments(new ProfileFragment(), "Profile");
    viewPagerAdapter.addFragments(new AppointmentsFragment(), "Appointments");
    viewPager.setAdapter(viewPagerAdapter);
    tabLayout.setupWithViewPager(viewPager);
}

}`

Answer 1

首先打开片段，方法是在loginactivity中执行此操作

LoginActivity.class

import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;

import com.example.vostro.myapplication.fragments.FragmentDemo;

public class LoginActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login_main);

        Bundle bundle = new Bundle();
        bundle.putString("first_name",jsonObject.getString("first_name"));
        bundle.putString("last_name",jsonObject.getString("last_name"));
        bundle.putString("username",jsonObject.getString("username"));
        bundle.putString("email",jsonObject.getString("email"));
        bundle.putString("mobile",jsonObject.getString("mobile"));
        bundle.putString("appointments",jsonObject.getString("appointments"));

        FragmentDemo fragment = new FragmentDemo();
        fragment.setArguments(bundle);
        FragmentManager fragmentManager = getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.replace(R.id.navigation_container, fragment);
        fragmentTransaction.commit();

    }
}

然后在您的新片段中，通过以下操作获取数据

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.example.vostro.myapplication.R;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

public class FragmentDemo extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_demo, null);

        String jsonArrayAppointments = getArguments().getString("appointments");

        try {
            JSONArray jsonArray = new JSONArray(jsonArrayAppointments);
            for (int i=0; i<jsonArray.length(); i++) {
                JSONObject jsonObject = jsonArray.getJSONObject(i);

                String yourRequiredField = jsonObject.getString("yourRequiredField");
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }


        return rootView;
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

    }
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">


        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="#2196F3"
            android:minHeight="?attr/actionBarSize"></android.support.v7.widget.Toolbar>

       <TextView
           android:id="@+id/tv"
           android:layout_width="match_parent"
           android:layout_height="match_parent"
           android:layout_gravity="center"
           android:textSize="20sp"
           android:gravity="center"
           android:text="@string/text"/>

    <!-- This will hold your Fragment -->
        <LinearLayout
            android:id="@+id/fragment_container"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"></LinearLayout>

</LinearLayout>