在不同的Activity中使用Nav Drawer设置

Question

所以我正在创建一个应用程序，我希望用户能够在登录后决定是否要使用WiFi或4G来获取数据（我将在后面提出另一个关于实施决策的问题，除非有人想要在这里添加）。所以目前我有一个MainActivity.java将处理登录（我还没有实现），我有一个NavDrawerActivity.java用于导航抽屉。现在很明显，一旦我登录“登录”，就会进入导航抽屉。但是，我希望用户能够在登录之前选择是否使用Wifi或数据，以及在登录后能够选择。所以我想这是一个两部分问题，你将如何实现这一点那么，把它放在登录界面是个好主意吗？或者我应该默认它总是使用wifi，除非他们改变它，如果我检测到WiFi没有启用，让他们启用它？

MainActivity.java代码

package com.example.jamessingleton.chffrapi;

import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;


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

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;


public class MainActivity extends AppCompatActivity {

    EditText emailText;
    TextView responseView;
    ProgressBar progressBar;
    static final String API_KEY = "USE_YOUR_OWN_API_KEY";
    static final String API_URL = "https://api.fullcontact.com/v2/person.json?";
    static final String ClientId= "";
    static final String ClientSecret = "";



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

        responseView = (TextView) findViewById(R.id.responseView);
        emailText = (EditText) findViewById(R.id.emailText);
        progressBar = (ProgressBar) findViewById(R.id.progressBar);
        final Context context = this;
        Button queryButton = (Button) findViewById(R.id.queryButton);
        queryButton.setOnClickListener(new View.OnClickListener() {


            @Override
            public void onClick(View v) {
                new RetrieveFeedTask().execute();

                Intent intent = new Intent(context, NavDrawerActivity.class);
                startActivity(intent);
            }
        });
    }


    class RetrieveFeedTask extends AsyncTask<Void, Void, String> {

        private Exception exception;

        protected void onPreExecute() {
            progressBar.setVisibility(View.VISIBLE);
            responseView.setText("");
        }

        protected String doInBackground(Void... urls) {
            String email = emailText.getText().toString();
            // Do some validation here

            try {
                URL url = new URL(API_URL + "email=" + email + "&apiKey=" + API_KEY);
                HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
                try {
                    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
                    StringBuilder stringBuilder = new StringBuilder();
                    String line;
                    while ((line = bufferedReader.readLine()) != null) {
                        stringBuilder.append(line).append("\n");
                    }
                    bufferedReader.close();
                    return stringBuilder.toString();
                }
                finally{
                    urlConnection.disconnect();
                }
            }
            catch(Exception e) {
                Log.e("ERROR", e.getMessage(), e);
                return null;
            }
        }

        protected void onPostExecute(String response) {
            if(response == null) {
                response = "THERE WAS AN ERROR";
            }
            progressBar.setVisibility(View.GONE);
            Log.i("INFO", response);
            responseView.setText(response);
            // TODO: check this.exception
            // TODO: do something with the feed

//            try {
//                JSONObject object = (JSONObject) new JSONTokener(response).nextValue();
//                String requestID = object.getString("requestId");
//                int likelihood = object.getInt("likelihood");
//                JSONArray photos = object.getJSONArray("photos");
//                .
//                .
//                .
//                .
//            } catch (JSONException e) {
//                e.printStackTrace();
//            }
        }
    }
}

NavDrawerActivity.java代码

package com.example.jamessingleton.chffrapi;

import android.app.FragmentManager;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.RadioButton;
import android.widget.RadioGroup;




public class NavDrawerActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener{


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_nav_drawer);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);

            fab.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    //Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                    //.setAction("Action", null).show();
                    Intent sendIntent = new Intent();
                    sendIntent.setAction(Intent.ACTION_SEND);
                    sendIntent.putExtra(Intent.EXTRA_TEXT, "This is my text to send.");
                    sendIntent.setType("text/plain");
                    startActivity(Intent.createChooser(sendIntent, getResources().getText(R.string.send_to)));
                }
            });


        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.setDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
    }


    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.nav_drawer, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        FragmentManager fragmentSettingsManager = getFragmentManager();
        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            fragmentSettingsManager.beginTransaction().replace(R.id.content_frame, new SettingsFragment()).commit();
            setTitle(R.string.action_settings);
            FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
            fab.setVisibility(View.GONE);
        }
        return super.onOptionsItemSelected(item);
    }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();
        FragmentManager fragmentManager = getFragmentManager();
        if (id == R.id.nav_first_layout) {
            fragmentManager.beginTransaction().replace(R.id.content_frame, new FirstFragment()).commit();
            setTitle(R.string.speed_graph);
            FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
            fab.setVisibility(View.VISIBLE);
        } else if (id == R.id.nav_second_layout) {
            fragmentManager.beginTransaction().replace(R.id.content_frame, new SecondFragment()).commit();
            setTitle(R.string.drive_player);
            FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
            fab.setVisibility(View.VISIBLE);
        } else if (id == R.id.nav_third_layout) {
            fragmentManager.beginTransaction().replace(R.id.content_frame, new ThirdFragment()).commit();
            setTitle(R.string.google_maps);
            FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
            fab.setVisibility(View.VISIBLE);
        } else if (id == R.id.nav_share) {
            Intent sendIntent = new Intent();
            sendIntent.setAction(Intent.ACTION_SEND);
            sendIntent.putExtra(Intent.EXTRA_TEXT, "Go Check Out All Driving Data in the Play Store!");
            sendIntent.setType("text/plain");
            startActivity(Intent.createChooser(sendIntent, getResources().getText(R.string.send_to)));
        }

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }
}

如果您还需要其他任何内容，请告诉我们，谢谢大家的帮助：）

这是WifivsDataDialog代码

    package com.example.jamessingleton.chffrapi;

import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.os.Bundle;

/**
 * Created by James Singleton on 8/9/2016.
 */

public class WifivsDataDialog extends DialogFragment {
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        // Use the Builder class for convenient dialog construction
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder.setMessage(R.string.dialog_box)
                .setPositiveButton(R.string.WiFi, new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        // FIRE ZE MISSILES!
                    }
                })
                .setNegativeButton(R.string.Cell_Data, new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        // User cancelled the dialog
                    }
                });
        // Create the AlertDialog object and return it
        return builder.create();
    }
}

Answer 1

你想要达到的目标并不完全清楚。

获取数据是否必须？如果用户在设备上同时禁用了Wi-Fi和移动网络，该怎么办？如果他们选择使用Wi-Fi但只在设备上启用移动网络会怎样？

我会在应用程序的开头创建一个Dialog来解释这些内容并让用户选择是否允许使用在移动网络或Wi-Fi上获取数据“请勿再次显示此对话框” CheckBox。

如果用户选择CheckBox选中，那么这将是进一步启动时的默认行为（可以在首选项/设置中更改）。

您可以在登录信息Dialog onCreate()中显示Activity。

例如：

connection_dialog.xml ：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Would you like to allow fetching data on mobile network?"/>

    <RadioGroup
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Yes"/>

        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="No, allow Wi-Fi only"/>
    </RadioGroup>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="end"
        android:text="OK"/>

</LinearLayout>

ConnectionDialogFragment.java ：

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.DialogFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class ConnectionDialogFragment extends DialogFragment {

    public ConnectionDialogFragment() {
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.connection_dialog, container, false);

        // set up your View here

        return view;
    }
}

在您的Activity：

中

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

    // ...

    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
    if(prefs.getBoolean("show_dialog", true)) {
        showDialog();
    }
}

private void showDialog() {
    ConnectionDialogFragment dialog = new ConnectionDialogFragment();
    dialog.show(getSupportFragmentManager(), "connection_dialog");
}

查看Dialogs上的开发人员指南。

当用户选择是否只想使用Wi-Fi，或者也允许使用移动网络时，您可以使用以下内容检查可用连接：

// this method will return either
// ConnectivityManager.TYPE_MOBILE
// or
// ConnectivityManager.TYPE_WIFI
// or -1 (if no connection is available)
private int checkAvailableConnectionType() {
    ConnectivityManager manager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
    NetworkInfo activeNetwork = manager.getActiveNetworkInfo();
    int type = activeNetwork.getType();
    if(activeNetwork.isConnected() && (type == ConnectivityManager.TYPE_MOBILE ||
            type == ConnectivityManager.TYPE_WIFI)) {
        return type;
    }
    return -1;
}

根据用户的选择和当前活动的连接（建议用户打开Wi-Fi）来完成您的工作。