java - 如何重新启动相同的 Activity ？

Question

如果我有 10 个 EditText 并且用户仅输入 5 个，那么我在单击 onBackPressed 按钮时退出我的应用程序，而不提交正在输入的 EditText 数据，然后当我重新启动我的应用程序时，我希望在启动时进行相同的 Activity 。感谢appriceat。

public class Registration_Form extends Activity {
EditText et_CompanyName;
EditText et_EmployeeName;
EditText et_CompanyWebsite;
EditText et_ContactNumber;
EditText et_Email_Id;

Button btnSubmit;
DatabaseHelper databaseHelper;
SQLiteDatabase db;

 RadioGroup radioGroup_FinancialYaer;
 RadioButton radioButton_FinancialYaer; 
 String strFinancialYear;
 String appWidgetId = null;


public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.registration_details);

    SharedPreferences prefs =  PreferenceManager.getDefaultSharedPreferences(this);
    final SharedPreferences.Editor edit = prefs.edit();
    boolean alldataSaved=prefs.getBoolean("SecondRun",false);

    et_CompanyName = (EditText) findViewById(R.id.editText_CompanyName);
    et_EmployeeName = (EditText) findViewById(R.id.editText_EmployeeName);
    et_CompanyWebsite = (EditText) findViewById(R.id.editText_CompanyWebSite);
    et_ContactNumber = (EditText) findViewById(R.id.editText_ConatctNo);
    et_Email_Id = (EditText) findViewById(R.id.editText_EmailId);



    et_CompanyName.setOnFocusChangeListener(new OnFocusChangeListener() {          

        public void onFocusChange(View v, boolean hasFocus) {
            if(!hasFocus)
            {
                edit.putString("Company_Name"+appWidgetId,et_CompanyName.getText().toString());
                edit.commit();
            }
        }
    });


    et_EmployeeName.setOnFocusChangeListener(new OnFocusChangeListener() {          

        public void onFocusChange(View v, boolean hasFocus) {
            if(!hasFocus)
            {
                edit.putString("Employee_Name"+appWidgetId,et_EmployeeName.getText().toString());
                edit.commit();
            }
        }
    });



    et_CompanyWebsite.setOnFocusChangeListener(new OnFocusChangeListener() {          

        public void onFocusChange(View v, boolean hasFocus) {
            if(!hasFocus)
            {
                edit.putString("Company_Website"+appWidgetId,et_CompanyWebsite.getText().toString());
                edit.commit();
            }
        }
    });


    et_ContactNumber.setOnFocusChangeListener(new OnFocusChangeListener() {          

        public void onFocusChange(View v, boolean hasFocus) {
            if(!hasFocus)
            {
                edit.putString("Contact_Number"+appWidgetId,et_ContactNumber.getText().toString());
                edit.commit();
            }
        }
    });



    et_Email_Id.setOnFocusChangeListener(new OnFocusChangeListener() {          

        public void onFocusChange(View v, boolean hasFocus) {
            if(!hasFocus)
            {
                edit.putString("Email_Id"+appWidgetId,et_Email_Id.getText().toString());
                edit.commit();
            }
        }
    });






      SharedPreferences settings=getSharedPreferences("prefs",0); 
      boolean firstRun=settings.getBoolean("firstRun",false);

      if(firstRun==false)//if running for first time 

      {
          SharedPreferences.Editor editor=settings.edit();
          editor.putBoolean("firstRun",true); 
          editor.commit();
          //execute your code for first time
      } 

      else 
      { 
          if(alldataSaved == false)
          {
              SharedPreferences.Editor editor=prefs.edit();
              editor.putBoolean("SecondRun",true); 
              editor.commit();
              Log.e("Second"," Steps !!!!");
          }
          else
          {
              Intent iSubmit = new Intent(Registration_Form.this,Employee_List.class);
              startActivity(iSubmit);
              finish();
              //Default Activity startActivity(a); 
          }

      }

    databaseHelper = new DatabaseHelper(this);
    databaseHelper.onOpen(db);


    radioGroup_FinancialYaer = (RadioGroup)findViewById(R.id.radioGroupFinanncialYear);


    btnSubmit = (Button) findViewById(R.id.buttonSubmit);
    btnSubmit.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

            final String stringEmail_Id = et_Email_Id.getText().toString()
                    .trim();

            final String stringCompanyWebsite = et_CompanyWebsite.getText()
                    .toString().trim();

            if ((et_CompanyName.getText().toString().isEmpty()))
            {
                et_CompanyName.setError("Field Can Not Be Empty !");
            }

            else if (!et_CompanyName.getText().toString().trim()
                    .matches("[a-zA-Z ]+"))
            {
                et_CompanyName.setError("Accept Alphabets Only.");
            }

            else if ((et_EmployeeName.getText().toString().isEmpty()))
            {
                et_EmployeeName.setError("Field Can Not Be Empty !");
            }

            else if (!et_EmployeeName.getText().toString().trim()
                    .matches("[a-zA-Z ]+"))
            {
                et_EmployeeName.setError("Accept Alphabets Only.");
            }

            else if ((et_CompanyWebsite.getText().toString().isEmpty()))
            {
                et_CompanyWebsite.setError("Field Can Not Be Empty !");
            }

            else if (!isValidUrl(stringCompanyWebsite))
            {
                et_CompanyWebsite.setError("Invalid URL");
            }

            else if ((et_ContactNumber.getText().toString().isEmpty()))
            {
                et_ContactNumber.setError("Field Can Not Be Empty !");
            }

            else if (!isValidEmail(stringEmail_Id))
            {
                et_Email_Id.setError("Invalid Email");
            }

            else

            {
                String stringCompanyName = et_CompanyName.getText()
                        .toString().trim();
                String stringContactNumber = et_ContactNumber.getText()
                        .toString().trim();
                String stringEmployeeName = et_EmployeeName.getText()
                        .toString().trim();


                int selectedId = radioGroup_FinancialYaer.getCheckedRadioButtonId();
                Log.e("selectedId "," = " + selectedId);
                radioButton_FinancialYaer = (RadioButton) findViewById(selectedId);
                strFinancialYear = radioButton_FinancialYaer.getText().toString().trim();
                Log.e("strRadioButton "," = " + strFinancialYear);


                databaseHelper.insertRegstrationDetails(stringCompanyName,
                        stringEmployeeName, stringCompanyWebsite,
                        stringContactNumber, stringEmail_Id, strFinancialYear);
                System.out.println("Data Inserted Successfully !!! ");

                Intent iSubmit = new Intent(Registration_Form.this,Staff_Employee_Details.class);
                startActivity(iSubmit);
                finish();
            }

        }
    });
}

Answer 1

你可以简单地使用这个

Intent intent = getIntent();
finish();
startActivity(intent);

我希望这有效