在Spinner上设置文本

Question

这是AccountListView，它从数据库中检索并以列表视图显示我添加的数据，我添加了现金和银行账户，当我在列表视图中点击现金时，它会打开交易意图，其中包含一个下拉菜单，其中添加了现金和银行，我希望它显示我在列表视图上单击的数据。请注意，仅对于下拉菜单，现金和银行的余额显示成功。

public class AccountListActivity extends Activity implements OnClickListener, OnItemClickListener {

private ListView AccountListView;
private Button addNewAccountButton;

private ListAdapter AccountListAdapter;


private ArrayList<AccountDetails> pojoArrayList;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.list);

    AccountListView = (ListView) findViewById(R.id.AccountListView);
    AccountListView.setOnItemClickListener(this);
    registerForContextMenu(AccountListView);
    addNewAccountButton = (Button) findViewById(R.id.namesListViewAddButton);
    addNewAccountButton.setOnClickListener(this);

    pojoArrayList = new ArrayList<AccountDetails>();


    AccountListAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, populateList());

    AccountListView.setAdapter(AccountListAdapter);

}
@Override  
public void onCreateContextMenu(ContextMenu menu, View v,ContextMenuInfo menuInfo) {  
super.onCreateContextMenu(menu, v, menuInfo);  
    menu.setHeaderTitle("Menu");  
    menu.add(0, v.getId(), 0, "Update");  
    menu.add(0, v.getId(), 0, "Delete");
    menu.add(0, v.getId(), 0, "Cancel");

}  

public List<String> populateList(){


    List<String> AccountList = new ArrayList<String>();


    DatabaseAdapter openHelperClass = new DatabaseAdapter(this);


    SQLiteDatabase sqliteDatabase = openHelperClass.getReadableDatabase();


    Cursor cursor = sqliteDatabase.query(DatabaseAdapter.TABLE_ACCOUNT, null, null, null, null, null, null);


    startManagingCursor(cursor);


    while (cursor.moveToNext()) {


        String aBNAME = cursor.getString(cursor.getColumnIndex(DatabaseAdapter.KEY_BANKNAME));
        String aBTYPE = cursor.getString(cursor.getColumnIndex(DatabaseAdapter.KEY_TYPE));
        String aAccNum = cursor.getString(cursor.getColumnIndex(DatabaseAdapter.KEY_ACCNUM));
        String aBal = cursor.getString(cursor.getColumnIndex(DatabaseAdapter.KEY_BALANCE));
        String aEDate = cursor.getString(cursor.getColumnIndex(DatabaseAdapter.KEY_EXPIRYDATE));


        AccountDetails ugPojoClass = new AccountDetails();
        ugPojoClass.setaBankName(aBNAME);
        ugPojoClass.setaAccountType(aBTYPE);
        ugPojoClass.setaAccountNumber(aAccNum);
        ugPojoClass.setaBalance(aBal);
        ugPojoClass.setaDate(aEDate);

        pojoArrayList.add(ugPojoClass);

        AccountList.add(aBNAME);    
    }

    sqliteDatabase.close();

    return AccountList;
}

    @Override
public void onItemClick( AdapterView<?> arg0, View arg1, int arg2, long arg3) {

    Toast.makeText(getApplicationContext(), "Clicked on :" + arg2, Toast.LENGTH_SHORT).show();

    Intent updateDeleteAccountIntent = new Intent(this, Transaction.class);

    AccountDetails clickedObject =  pojoArrayList.get(arg2);

    Bundle dataBundle = new Bundle();
    dataBundle.putString("clickedBankName", clickedObject.getaBankName());
    dataBundle.putString("clickedBankType", clickedObject.getaAccountType());
    dataBundle.putString("clickedBankNumber", clickedObject.getaAccountNumber());
    dataBundle.putString("clickedBankBalance", clickedObject.getaBalance());
    dataBundle.putString("clickedExpiryDate", clickedObject.getaDate());


    updateDeleteAccountIntent.putExtras(dataBundle);

    startActivity(updateDeleteAccountIntent);

}

当交易意图打开时，它会获取Transaction.java的值。

public class Transaction extends Activity implements OnClickListener{

 private Spinner Category, Account, typerp;
 private TextView tvSaveNew, tvDisplayDate;
 private EditText ItemName, Amount, Notes;
 private EditText Balance, Result;
 private ImageButton TransDate, ImageButton1;
 private Button save, newt;

private String bundledBankName;
private String bundledBankType;
private String bundledBankNumber;
private String bundledBankBalance;
private String bundledBankDate;
private String BankNameValue;
private String NewBankBalanceValue;
private String BankTypeValue;
private String BankNumberValue;
private String BankBalanceValue;
private String BankDateValue;

 private int year;
 private int month;
 private int day;
 static final int DATE_DIALOG_ID = 999;

 private ArrayList<TransactionDetails> TransactionDetailsObjArrayList;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.transaction);

    save = (Button) findViewById(R.id.TbtnSave);
    newt = (Button) findViewById(R.id.btnNewTran);
    TransDate = (ImageButton) findViewById(R.id.transDate);
    Category = (Spinner) findViewById(R.id.Tcategory);
    Account = (Spinner) findViewById(R.id.TAccount);
    typerp = (Spinner) findViewById(R.id.TypeR);
    ItemName = (EditText) findViewById(R.id.TransItemName);
    Amount = (EditText) findViewById(R.id.TransAmount);
    Notes = (EditText) findViewById(R.id.tranNote);
    Balance = (EditText) findViewById(R.id.RetrieveBalance);
    Result = (EditText) findViewById(R.id.ResultBalance);
    tvDisplayDate = (TextView) findViewById(R.id.ttvDisplayDate);

    save.setOnClickListener(this);
    newt.setOnClickListener(this);
    setCurrentDateOnView();
    TransDate.setOnClickListener(this);

    TransactionDetailsObjArrayList = new ArrayList<TransactionDetails>();
    loadSpinnerData();

    Bundle takeBundledData = getIntent().getExtras();


    bundledBankName = takeBundledData.getString("clickedBankName");

    bundledBankBalance = takeBundledData.getString("clickedBankBalance");



    Account.setSelection(0);
    Balance.setText(bundledBankBalance);

}

- Sheila Perumal

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首先学习有关Spinner的内容，请访问http://developer.android.com/guide/topics/ui/controls/spinner.html。 - Niranj Patel

旋转器是用来处理数据列表/显示当前选择的内容。这与仅设置其文本不同。 - Shellum

将您的“标题”添加到数组的第0个位置，并将该数组设置为您的Spinner。 - MKJParekh

Answer 1

刚才用包含字符串列表的旋转器进行了测试，似乎工作正常。可能会对某个人有帮助。

public void setSpinText(Spinner spin, String text)
{
    for(int i= 0; i < spin.getAdapter().getCount(); i++)
    {
        if(spin.getAdapter().getItem(i).toString().contains(text))
        {
            spin.setSelection(i);
        }
    }

}

:)

- user3786552

Answer 2

使用以下代码首先设置Spinner的Adapter。

ArrayAdapter<String> adapter = new ArrayAdapter<String>(PaymentTerms_NewInvoice_Activity.this, android.R.layout.simple_spinner_item, mTempArray);
mSpnTermsCode.setAdapter(adapter);

使用以下代码将Spinner的第一项显示为所选项。

mSpnTermsCode.setSelection(0);

- Dipak Keshariya

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当我使用sSpnTermsCode.setSelection(0)时，它会显示第一个。等等！我已经在列表视图中显示了数据，我想要的是当我点击列表视图上的第一个数据时，打开一个意图并在一个下拉列表中显示该值。 对于编辑文本（余额），它的工作方式如上所示。只适用于下拉列表。 - Sheila Perumal

@SheilaPerumal 将索引值保存在一个变量中并传递到意图中，然后编写 mSpnTermsCode.setSelection(indexvalue); 如果您对此有疑问，请告诉我。 - Dipak Keshariya

不，仍然存在一些困难。 - Sheila Perumal

@SheilaPerumal，请告诉我有什么问题。 - Dipak Keshariya

`TransactionDetailsObjArrayList = new ArrayList<TransactionDetails>(); loadSpinnerData(); Bundle takeBundledData = getIntent().getExtras(); bundledBankName = takeBundledData.getString("clickedBankName"); bundledBankBalance = takeBundledData.getString("clickedBankBalance"); Account.setSelection(0); Balance.setText(bundledBankBalance);` - Sheila Perumal

Answer 3

如果您正在使用Kotlin，这是一个扩展函数，根据user3786552的答案设置spinner的文本。

fun Spinner.setSpinnerText(text: String) {
        for (i in 0 until this.adapter.count) {
            if (this.adapter.getItem(i).toString().contains(text)) {
                this.setSelection(i)
            }
        }
    }

- Bolaji

Answer 4

对于Spinner，您需要设置适配器来绑定数据

     Spinner Account;
     ArrayAdapter<String> productaddapter;
     List<String> productname=new ArrayList<String>();
     //Fill your data in productname arraylist..          

     productaddapter = new ArrayAdapter<String>(getApplicationContext(),android.R.layout.simple_spinner_dropdown_item, productname);

     Account.setAdapter(productaddapter);

在适配器中，您需要设置您的列表。

- J.D.

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始终尽力给出完整的答案... mContext是什么，productaddapter是什么，productname是什么？ - Niranj Patel

@SheilaPerumal 那么您想对Spinner做什么？ - J.D.

@JigneshDer 我已经在列表视图中显示了数据，我想要的是当我点击列表视图上的第一个数据时，打开一个意图并在一个下拉框中显示该值。对于编辑文本（余额），它的工作方式如上所示。只有对于下拉框。我已经编辑了我的代码。谢谢。 - Sheila Perumal