堆栈内存溢出
  繁体   English   中英

Android Spinner Selected Item 在下一个活动开始时获得更改

[英]Android Spinner Selected Item get changes on start of next activity

 原文  2017-03-03 11:57:14  1   2    java/ android

问题描述

在我的应用程序中，我在一个活动中使用了多个微调器，一切正常，但是当我根据当前活动中选定的微调器项目启动另一项活动时，所有微调器选定的项目都会自行更改其“0”索引值. 当我从下一个活动返回到带有微调器的活动时（即活动恢复时），其选定的值设置为“0”索引。 我怎样才能阻止微调器在开始另一个活动时更改其所选项目的这种行为。

用于保存微调器值索引的 onSavedInstanceStateMethod

 @Override
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putInt("InterestSpinner", interest.getSelectedItemPosition());
    outState.putInt("CompanySpinner", company.getSelectedItemPosition());
    outState.putInt("PolicySpinner", policy.getSelectedItemPosition());
    outState.putInt("DeptSpinner", dept.getSelectedItemPosition());
}

这是我在将一些字符串放入意图后调用另一个活动的方式

Intent intent = new Intent(PolicySelection.this, TakePicture.class);

                intent.putExtra("INTERESTID", interestId);
                intent.putExtra("COMPANYID", companyId);
                intent.putExtra("TRANSID", transID);
                intent.putExtra("UserName", username);
                intent.putExtra("Password", password);
                intent.putExtra("ClaimID", "");
                intent.putExtra("OP", "UNDERWRITING");

                startActivity(intent);

这是我的一个微调器 onItemChangeListener() 方法`

company.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        public void onItemSelected(AdapterView<?> arg0, View v, int position, long id) {
            popDeptSpinner();
            popPolicySpinner();
            popInterestSpinner();
        }

        public void onNothingSelected(AdapterView<?> arg0) {
        }
    });`

这是我的 onCreate 方法

 @Override
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.policy_selection);

    policy = (Spinner) findViewById(R.id.policySelectionSpinner);
    company = (Spinner) findViewById(R.id.companySelectSpinner);
    interest = (Spinner) findViewById(R.id.interestIdSpinner);
    department = (Spinner) findViewById(R.id.deptSpinner);
    camera = (Button) findViewById(R.id.camera);
    damages = (Button) findViewById(R.id.damages);
    upload = (Button) findViewById(R.id.upload);
    showDetail = (Button) findViewById(R.id.showDetail);
    title = (TextView) findViewById(R.id.title);


    popCompanySpinner();

    popDeptSpinner();

    popPolicySpinner();

    popInterestSpinner();


    showDetail.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            boolean ready = isNetworkAvailable();
            if (ready) {
                if (policy.getAdapter().getCount() > 0) {
                    deptID = department.getSelectedItem().toString();
                    if (deptID.equals("MOTOR") || deptID.equals("MISCELLEANEOUS")) {
                        interestId = interest.getSelectedItem().toString();
                        transID = transId_list.get(getPositions(policy.getSelectedItem().toString()));
                        branchId = branchId_list.get(getPositions(policy.getSelectedItem().toString()));
                        deptNo = deptNoList.get(getPositions(policy.getSelectedItem().toString()));

                        Intent intent = new Intent(PolicySelection.this, InterestDetail.class);

                        intent.putExtra("UserName", username);
                        intent.putExtra("Password", password);
                        intent.putExtra("InterestID", interestId);
                        intent.putExtra("DeptID", deptNo);
                        intent.putExtra("TransID", transID);

                        startActivity(intent);

                    } else {
                        Toast.makeText(PolicySelection.this, "No Details for Current Policy!", Toast.LENGTH_SHORT).show();
                    }
                } else {
                    Toast.makeText(PolicySelection.this, "No Policy Exists in Company! ", Toast.LENGTH_LONG).show();
                }
            } else {
                Toast.makeText(PolicySelection.this, "Internet Connectivity Problem!", Toast.LENGTH_SHORT).show();
            }

        }
    });

    damages.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            boolean ready = isNetworkAvailable();
            if (ready) {
                if (policy.getAdapter().getCount() > 0) {
                    if (department.getSelectedItem().toString().equals("MOTOR")) {
                        Integer pos;
                        pos = getPositions(policy.getSelectedItem().toString());
                        switch (company.getSelectedItem().toString()) {
                            case "UIC":
                                transID = transId_list.get(pos);
                                companyId = "UIC";
                                surveyTransID = UICSurveyTransID.get(getInterestIdPositions(interest.getSelectedItem().toString()));
                                break;
                            case "UICTAK":
                                transID = transId_list.get(pos);
                                companyId = "UICTAK";
                                surveyTransID = UICTAKSurveyTransID.get(getInterestIdPositions(interest.getSelectedItem().toString()));
                                break;
                            case "SPI":
                                transID = transId_list.get(pos);
                                companyId = "SPI";
                                surveyTransID = SPISurveyTransID.get(getInterestIdPositions(interest.getSelectedItem().toString()));
                                break;
                            case "SPITAK":
                                transID = transId_list.get(pos);
                                companyId = "SPITAK";
                                surveyTransID = SPITAKSurveyTransID.get(getInterestIdPositions(interest.getSelectedItem().toString()));
                                break;
                            default:
                                break;
                        }

                        Intent intent = new Intent(PolicySelection.this, DamagesDetail.class);

                        if (Objects.equals(transID, "")) {
                            company.getSelectedItem().toString();
                        } else {

                            String options = new WebServiceCall().getPreInspectionOptions("GetPreInspectionOptions", username, password, companyId, transID);

                            intent.putExtra("TRANSID", transID);
                            intent.putExtra("COMPANYID", companyId);
                            intent.putExtra("UserName", username);
                            intent.putExtra("Password", password);
                            intent.putExtra("Options", options);
                            intent.putExtra("SurveyTransID", surveyTransID);
                        }

                        startActivity(intent);

                    } else {
                        Toast.makeText(PolicySelection.this, "No Damages Form for Current Policy!", Toast.LENGTH_SHORT).show();
                    }
                } else {
                    Toast.makeText(PolicySelection.this, "No Policy Exists in Company! ", Toast.LENGTH_LONG).show();
                }

            } else {
                Toast.makeText(PolicySelection.this, "Internet Connectivity Problem!", Toast.LENGTH_SHORT).show();
            }
        }
    });

    upload.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            boolean ready = isNetworkAvailable();
            if (ready) {
                if (policy.getAdapter().getCount() > 0) {

                    Integer pos;
                    pos = getPositions(policy.getSelectedItem().toString());

                    switch (company.getSelectedItem().toString()) {
                        case "UIC":
                            transID = transId_list.get(pos);
                            branchId = branchId_list.get(pos);
                            break;
                        case "UICTAK":
                            transID = transId_list.get(pos);
                            branchId = branchId_list.get(pos);
                            break;
                        case "SPI":
                            transID = transId_list.get(pos);
                            branchId = branchId_list.get(pos);
                            break;
                        case "SPITAK":
                            transID = transId_list.get(pos);
                            branchId = branchId_list.get(pos);
                            break;
                        default:
                            break;
                    }

                    Intent intent = new Intent(PolicySelection.this, SendInfoForm.class);

                    intent.putExtra("USERNAME", username);
                    intent.putExtra("PASSWORD", password);
                    intent.putExtra("COMPANYID", company.getSelectedItem().toString());
                    intent.putExtra("LAT", "1");
                    intent.putExtra("LONG", "1");
                    intent.putExtra("DEPTID", department.getSelectedItem().toString());
                    intent.putExtra("INTERESTID", interest.getSelectedItem().toString());
                    intent.putExtra("BRANCHID", branchId);
                    intent.putExtra("TRANSID", transID);
                    intent.putExtra("OP", "UNDERWRITING");
                    intent.putExtra("CLAIMID", "");

                    startActivity(intent);
                } else {
                    Toast.makeText(PolicySelection.this, "No Policy Exists in Company! ", Toast.LENGTH_LONG).show();
                }

            } else {
                Toast.makeText(PolicySelection.this, "Internet Connectivity Problem!", Toast.LENGTH_SHORT).show();
            }
        }
    });

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

            if (policy.getAdapter().getCount() > 0) {

                Integer pos;
                pos = getPositions(policy.getSelectedItem().toString());

                if (policyList != null) {
                    if (Objects.equals(SelectedPolicy, " ")) {
                        SelectedPolicy = company.getSelectedItem().toString();
                    }
                }
                switch (company.getSelectedItem().toString()) {
                    case "UIC":
                        interestId = interest.getSelectedItem().toString();
                        companyId = "UIC";
                        transID = transId_list.get(pos);
                        break;
                    case "UICTAK":
                        interestId = interest.getSelectedItem().toString();
                        companyId = "UICTAK";
                        transID = transId_list.get(pos);
                        break;
                    case "SPI":
                        interestId = interest.getSelectedItem().toString();
                        companyId = "SPI";
                        transID = transId_list.get(pos);
                        break;
                    case "SPITAK":
                        interestId = interest.getSelectedItem().toString();
                        companyId = "SPITAK";
                        transID = transId_list.get(pos);
                        break;
                    default:
                        break;
                }

                Intent intent = new Intent(PolicySelection.this, TakePicture.class);

                intent.putExtra("INTERESTID", interestId);
                intent.putExtra("COMPANYID", companyId);
                intent.putExtra("TRANSID", transID);
                intent.putExtra("UserName", username);
                intent.putExtra("Password", password);
                intent.putExtra("ClaimID", "");
                intent.putExtra("OP", "UNDERWRITING");

                startActivity(intent);

            } else {
                Toast.makeText(PolicySelection.this, "No Policy Exists in Company! ", Toast.LENGTH_LONG).show();
            }
        }
    });

    company.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        public void onItemSelected(AdapterView<?> arg0, View v, int position, long id) {
            popDeptSpinner();
            popPolicySpinner();
            popInterestSpinner();
        }

        public void onNothingSelected(AdapterView<?> arg0) {
        }
    });

    policy.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        public void onItemSelected(AdapterView<?> arg0, View v, int position, long id) {
            if (policyList != null) {
                SelectedPolicy = policy.getSelectedItem().toString();
                policy.setSelection(position);
                popInterestSpinner();
            }
        }

        public void onNothingSelected(AdapterView<?> arg0) {
        }
    });

    interest.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
            if (interestList != null) {

            }
        }

        @Override
        public void onNothingSelected(AdapterView<?> adapterView) {

        }
    });

    department.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
            popPolicySpinner();
            popInterestSpinner();
        }

        @Override
        public void onNothingSelected(AdapterView<?> adapterView) {

        }
    });


}

2 个解决方案

解决方案1
 0  2017-03-03 12:31:49

如何使用SaveInstanceState

@Override
public void onSaveInstanceState(Bundle outState) {//store your instance here
   outState.putString("message", "This is my message to be reloaded");
   super.onSaveInstanceState(outState);
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (savedInstanceState != null) {//load your instance here
        int position= savedInstanceState.getInt("InterestSpinner",0);
        spinner.setSelection(interestSpiner);
    }
}

或者

@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
    super.onRestoreInstanceState(savedInstanceState);
    int position= savedInstanceState.getInt("InterestSpinner",0);
    spinner.setSelection(interestSpiner);
}

解决方案2
 0  2020-04-25 12:41:48

这已经来不及回答了。 但它可能会帮助其他人。

当活动恢复时，company.setOnItemSelectedListener 方法被调用并触发 pop 方法，

  popDeptSpinner();
  popPolicySpinner();
  popInterestSpinner();

所以所有的微调器都被重置为第 0 个索引。 因此，我将微调器选择的值保存在成员变量中，并使用微调器的 setSelection 方法再次将其设置为上述 pop 方法上的微调器。

 if(!dept.isEmpty()){
      Cursor cc = (Cursor) (department .getSelectedItem());
      for (int i = 0; i < cc.getCount(); i++) {
           cc.moveToPosition(i);
           String temp = cc.getString((cc.getColumnIndex("_id")));
           if (temp.contentEquals("selected value")) {
                department .setSelection(i,false);
            }
      }
 }

暂无
暂无

声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.

相关问题 Android Spinner 获取所选项目 Android Spinner设置并获取所选项目的标签 如何在Android中获取微调框选择项 微调框未显示所选项目Android Android Spinner所选项目未显示 在Android中删除选定的微调项 Android Spinner选择了项目操作 如何从所选项目微调器（Android Studio 到 Firebase）获取值 微调项导致活动（Android Studio） Android微调器设置项目活动启动
相关标签
 
粤ICP备18138465号  © 2020-2024 STACKOOM.COM