Android: 按两次后退恢复会话

Question

我正在使用 android 制作一个登录应用程序。一切正常，但问题是当按下后退按钮两次时，注销的会话将恢复吗？好像是什么问题

用于注销的代码片段

public void logoutUser(){
        // Clearing all data from Shared Preferences
        editor.clear();
        editor.commit();


        Intent i = new Intent(_context, Login.class);
        // Closing all the Activities
        i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

        // Add new Flag to start new Activity
        i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);


        _context.startActivity(i);
    }

调用注销方法

btnLogout.setOnClickListener(new View.OnClickListener() {

                    public void onClick(View view) {
                        // Launching All products Activity
                        session.logoutUser();
                        Intent i = new Intent(getApplicationContext(), Login.class);
                        startActivity(i);

                    }
                });

登录码：

nameValuePairs = new ArrayList<NameValuePair>(2);

            nameValuePairs.add(new BasicNameValuePair("username",et.getText().toString().trim()));  // $Edittext_value = $_POST['Edittext_value'];
            nameValuePairs.add(new BasicNameValuePair("password",pass.getText().toString().trim())); 
            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

            response=httpclient.execute(httppost);

            ResponseHandler<String> responseHandler = new BasicResponseHandler();
            final String response = httpclient.execute(httppost, responseHandler);
            //System.out.println("Response : " + response); 
            runOnUiThread(new Runnable() {
                public void run() {
                    //tv.setText("Response from PHP : " + response);
                    dialog.dismiss();
                }
            });
             String username = et.getText().toString().trim();
            if(response.equalsIgnoreCase("User Found")){
                  session.createLoginSession(username);
                runOnUiThread(new Runnable() {
                    public void run() {
                        //Toast.makeText(Login.this,"Login Success", Toast.LENGTH_SHORT).show();
                        startActivity(new Intent(Login.this, AndroidTabLayoutActivity.class));
                    }
                });


            }else if(response.equalsIgnoreCase("Not Employee")){
                showAlertNotEmployee();
            }else if(response.equalsIgnoreCase("Disabled")){
                showAlertDisabled();
            }else{
                showAlertNotFound();                
            }

        }catch(Exception e){
            dialog.dismiss();
            System.out.println("Exception : " + e.getMessage());
        }
    }
    public void showAlertNotFound(){
        Login.this.runOnUiThread(new Runnable() {
            public void run() {
                AlertDialog.Builder builder = new AlertDialog.Builder(Login.this);
                builder.setTitle("Login Error.");
                builder.setMessage("User not Found.")  
                       .setCancelable(false)
                       .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                           public void onClick(DialogInterface dialog, int id) {
                           }
                       });                     
                AlertDialog alert = builder.create();
                alert.show();               
            }
        });
    }

    public void showAlertDisabled(){
        Login.this.runOnUiThread(new Runnable() {
            public void run() {
                AlertDialog.Builder builder = new AlertDialog.Builder(Login.this);
                builder.setTitle("Login Error.");
                builder.setMessage("Account Disabled.")  
                       .setCancelable(false)
                       .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                           public void onClick(DialogInterface dialog, int id) {
                           }
                       });                     
                AlertDialog alert = builder.create();
                alert.show();               
            }
        });
    }

    public void showAlertNotEmployee(){
        Login.this.runOnUiThread(new Runnable() {
            public void run() {
                AlertDialog.Builder builder = new AlertDialog.Builder(Login.this);
                builder.setTitle("Login Error.");
                builder.setMessage("Employee Account Only")  
                       .setCancelable(false)
                       .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                           public void onClick(DialogInterface dialog, int id) {
                           }
                       });                     
                AlertDialog alert = builder.create();
                alert.show();               
            }
        });
    }

}

Answer 1

尝试添加到 Activity 标签中的 androidmanifest.xml

 android:noHistory="true"

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