检查Android中的互联网连接

时间：2015-09-29 11:48:44

标签： android broadcastreceiver

我在android中创建了一个表单，其中包括firstname，lastname，mobile no等字段。 我正在使用web服务将这些数据发送到服务器并且它发生得很好。现在我想检查互联网连接，如果用户在填写表单并且用户提交表单时没有连接到互联网，表单应该上传到服务器每当用户回到互联网连接时。 任何人都可以告诉我实现此功能的方法。 我尝试使用广播接收器检查互联网连接但无法上传表格。我还必须在永久存储中保存表单字段。目前我将它们保存在bean类中。

我正在粘贴完整的表单活动类代码。 如果需要进行任何更改，请与我们联系

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

            Boolean isValidEmail = false;
            String first_name = firstname.getText().toString().trim();
            String last_name = lastname.getText().toString().trim();
            String country = nation.getText().toString().trim();
            String mail = email.getText().toString().trim();
            String firm = company.getText().toString().trim();
            String mobile = phone.getText().toString().trim();
            String post = title.getText().toString().trim();
            String emailPattern = "[a-zA-Z0-9._-]+@[a-z]+\\.+[a-z]+";
            if (first_name.equalsIgnoreCase("")) {
                Toast.makeText(getApplicationContext(), "Please enter your first name.", Toast.LENGTH_LONG).show();
            } else {
                registrationBean.setFname(first_name);
                if (last_name.equalsIgnoreCase("")) {
                    Toast.makeText(getApplicationContext(), "Please enter your last name.", Toast.LENGTH_LONG).show();
                } else {
                    registrationBean.setLname(last_name);
                    if (firm.equalsIgnoreCase("")) {
                        Toast.makeText(getApplicationContext(), "Please enter your company name.", Toast.LENGTH_LONG).show();
                    } else {
                        registrationBean.setCompany(firm);
                        if (post.equalsIgnoreCase("")) {
                            Toast.makeText(getApplicationContext(), "Please enter your designation", Toast.LENGTH_LONG).show();
                        } else {
                            registrationBean.setTitle(post);
                            if (mobile.equalsIgnoreCase("")) {
                                Toast.makeText(getApplicationContext(), "Please enter your phone number", Toast.LENGTH_SHORT).show();
                            } else {
                                registrationBean.setPhone(mobile);

                                if (mail.equalsIgnoreCase("") && !mail.matches(emailPattern)) {
                                    Toast.makeText(getApplicationContext(), "Invalid Email", Toast.LENGTH_LONG).show();

                                } else {
                                    registrationBean.setMail(mail);

                                    if (country.equalsIgnoreCase("")) {
                                        Toast.makeText(getApplicationContext(), "Please enter your country of residence", Toast.LENGTH_SHORT).show();
                                    } else {
                                        registrationBean.setNation(country);
                                        if (checked==true && registrationBean!=null)
                                        {

                                        }
                                        else {
                                            Toast.makeText(getApplicationContext(),"Please accept terms and conditions",Toast.LENGTH_LONG).show();
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }


    });
    if (img_path.equalsIgnoreCase("")) {
        retake_photo.setAlpha((float) 0.6);
    }
}

private void selectImage() {
    final CharSequence[] options = {"Take a Picture", "Choose from Gallery", "Cancel"};
    AlertDialog.Builder builder = new AlertDialog.Builder(ActivityForm.this);
    builder.setCancelable(false);
    builder.setTitle("Select Profile Photo!");
    builder.setItems(options, new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int item) {
            if (options[item].equals("Take a Picture")) {
                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                file = new File(Environment.getExternalStorageDirectory(), "temp.jpg");
                intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
                img_path = Environment.getExternalStorageDirectory() + "/temp.jpg";
                startActivityForResult(intent, 1);
            } else if (options[item].equals("Cancel")) {
                dialog.dismiss();
            }
            if (options[item].equals("Choose from Gallery")) {
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {

                    Intent photoPickerIntent = new Intent(Intent.ACTION_OPEN_DOCUMENT, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                    photoPickerIntent.setType("image/*");
                    photoPickerIntent.addCategory(photoPickerIntent.CATEGORY_OPENABLE);
                    startActivityForResult(photoPickerIntent, 2);
                } else if (options[item].equals("Cancel")) {
                    dialog.dismiss();
                } else {
                    Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                    img_path = MediaStore.Images.Media.EXTERNAL_CONTENT_URI.toString();
                    startActivityForResult(intent, 2);
                }
            }
        }
    });
    builder.show();
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
    switch (requestCode) {
        case 1:
            try {
                bitmap = AppUtils.decodeFile(file.getPath(), 100, 100);
                registrationBean.setImage(file.getPath());
                //  ExifInterface ei = new ExifInterface(file.getPath());
            } catch (Exception e) {
                e.printStackTrace();
            }
            if (bitmap != null) {

                iv_profile.setImageBitmap(bitmap);
                retake_photo.setAlpha(1);
            }


            break;
        case 2:
            try {
                String uriImage;
              imageUri = imageReturnedIntent.getData();
                final InputStream imageStream = getContentResolver().openInputStream(imageUri);
                final Bitmap selectedImage = BitmapFactory.decodeStream(imageStream);
                imageStream.close();
                if (selectedImage != null) {
                    iv_profile.setImageBitmap(selectedImage);
                    retake_photo.setAlpha(1);

                }


                 uriImage=imageUri.toString();
                registrationBean.setImage(uriImage);

            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            break;
    }
}
private void callRegistrationService()
{
    String fname=registrationBean.getFname();
    String lname=registrationBean.getLname();
    String company=registrationBean.getCompany();
    String mobile=registrationBean.getPhone();
    String designation=registrationBean.getTitle();
    String image=getPath(imageUri);
    String email=registrationBean.getMail();
    String country=registrationBean.getNation();
    //email,firstName,lastName,userImage,company,title,phone,country
    new RegistrationAsyncTask(this, email, fname, lname, image, company, designation, mobile, country).execute();
}

public String getPath(Uri uri) {
    String[] projection = { MediaStore.Images.Media.DATA };
    Cursor cursor = managedQuery(uri, projection, null, null, null);
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();
    return cursor.getString(column_index);
}
public class NetworkChangeReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(final Context context, final Intent intent) {
        final ConnectivityManager connMgr = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);

        final android.net.NetworkInfo wifi = connMgr
                .getNetworkInfo(ConnectivityManager.TYPE_WIFI);

        final android.net.NetworkInfo mobile = connMgr
                .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

        if (wifi.isAvailable() || mobile.isAvailable()) {
            // Do something
            callRegistrationService();
        }
    }
}

3 个答案:

答案 0 :(得分：0)

＆＃34;现在我想检查互联网连接，以及用户是否未连接到互联网＆＃34;

这可能会对你有帮助。

 public void isOnline() {
            ConnectivityManager conMgr = (ConnectivityManager) getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo netInfo = conMgr.getActiveNetworkInfo();

            if(!(netInfo == null || !netInfo.isConnected() || !netInfo.isAvailable())){
                isInternetAvailable=true;
            }
            else
                isInternetAvailable=false;
        }

答案 1 :(得分：0)

试试这个，

创建类Global.java 

import java.text.DecimalFormat;

import com.affinity.affinityrescue.R;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;

public class Global
{
    public static String _useremail;
    public static String _user_id;
    public static final String emailPattern = "[a-zA-Z0-9._-]+@[a-z]+\\.+[a-z]+";
    public static String regId = "";
    static Context context;
    static DecimalFormat decimalFormat = new DecimalFormat("#.#");

    public static boolean isNetworkconn(Context ctx)
    {
        context = ctx;

        ConnectivityManager connectivity = (ConnectivityManager) ctx.getSystemService(Context.CONNECTIVITY_SERVICE);
        if (connectivity != null)
        {
            NetworkInfo[] info = connectivity.getAllNetworkInfo();
            if (info != null)
                for (int i = 0; i < info.length; i++)
                    if (info[i].getState() == NetworkInfo.State.CONNECTED)
                    {
                        return true;
                    }

        }

        return false;
    }

    // THIS METHOD IS USED FOR SHOW DIALOG WHEN NO INTERNET
    public static void showDialogOnNoInternet(final Activity activity)
    {
        AlertDialog.Builder alt_bld = new AlertDialog.Builder(activity);
        alt_bld.setIcon(R.drawable.ic_launcher);
        alt_bld.setTitle("No Internet Connection");
        alt_bld.setMessage("Please check your internet connection");
        alt_bld.setCancelable(false);
        alt_bld.setIcon(R.drawable.ic_launcher);
        alt_bld.setNeutralButton("OK", new DialogInterface.OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialog, int which)
            {
                dialog.dismiss();
            }
        });
        alt_bld.show();
    }
}

在您需要的地方编写代码。

if (Global.isNetworkconn(getActivity())) {
//code for success.
}
else
{
   Global.showDialogOnNoInternet(getActivity());
}

多数民众赞成。

答案 2 :(得分：0)

我想即使在应用程序关闭应用程序应该检查互联网连接，当互联网可用时，它使用网络服务将上传表格转发到服务器。

我认为这种行为无法实现。

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