在Spinner上选择的项目是全球 - Android

Question

我有两个活动，其中“SecondActivity”有一个微调，微调选择项目被发送到“TerceiraActivity”。

但是，我想使itemselected上微调可变全球性的，所以这种方式，我会把这个变量在其他类，称为“BD.class”

这里是“SecondActivity”

package br.exemplosqlite; 

import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.Spinner; 

import org.w3c.dom.Text; 

public class SecondActivity extends Activity implements AdapterView.OnItemSelectedListener { 



@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_second); 

    //referencia a Spinner 
    //Spinner coligada; 

    //final TextView nome = (TextView)findViewById(R.id.txvNome); 
    //final TextView sobrenome = (TextView)findViewById(R.id.txvSobrenome); 
    //final Spinner pday = (Spinner)findViewById(R.id.spinner); 

    final Spinner spcoligada = (Spinner)findViewById(R.id.coligada); 








    //spinner = (Spinner)findViewById(R.id.spinner); 

    ArrayAdapter adaptercoligada= ArrayAdapter.createFromResource(this, R.array.coligada, android.R.layout.simple_spinner_item); 
    spcoligada.setAdapter(adaptercoligada); 



    Button ok = (Button)findViewById(R.id.btnok); 







    ok.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      //chamada para a nova Activity 
      Intent intent = new Intent(SecondActivity.this, TerceiraActivity.class); 
      intent.putExtra("coligada", spcoligada.getSelectedItem().toString()); 


      //intent.putExtra("nomePessoa", nome.getText().toString()); 
      //intent.putExtra("sobrenomePessoa", sobrenome.getText().toString()); 
      //intent.putExtra("day", pday.getSelectedItem().toString()); 










      startActivity(intent); 
     } 
    }); 
} 




@Override 
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 

} 

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

} 
     } 

这是 “TerceiraActivity”

package br.exemplosqlite; 

import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.widget.Spinner; 
import android.widget.TextView; 

公共类TerceiraActivity延伸活动{

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_terceira); 

    Intent intent = getIntent(); 
    //String parametro = (String) intent.getSerializableExtra("nomePessoa"); 
    //String psobrenome = (String) intent.getSerializableExtra("sobrenomePessoa"); 
    //String ppday = (String) intent.getSerializableExtra("day"); 

    String pcoligada = (String) intent.getSerializableExtra("coligada"); 











    //TextView nome = (TextView)findViewById(R.id.txvNome); 
    //TextView sobrenome = (TextView)findViewById(R.id.txvSobrenome); 
    TextView coligadas = (TextView)findViewById(R.id.spvcoligada); 






    //nome.setText("Olá " + parametro + ", Tem de fazer a barba "); 
    coligadas.setText("coliga escolhida : "+ pcoligada); 


} 


    } 

这是 “BD.class”

package br.exemplosqlite; 

import java.util.ArrayList; 
import java.util.List; 

import android.content.ContentValues; 
import android.content.Context; 
import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 

public class BD { 
private SQLiteDatabase bd; 

public BD(Context context){ 
    BDCore auxBd = new BDCore(context); 
    bd = auxBd.getWritableDatabase(); 
} 


public void inserir(Produtos produtos){ 
    ContentValues valores = new ContentValues(); 
    valores.put("item", produtos.getItem()); 
    valores.put("coligada", produtos.getColigada()); 
    valores.put("filial", produtos.getFilial()); 


    bd.insert("produtos2", null, valores); 
} 


public void atualizar(Produtos produtos){ 
    ContentValues valores = new ContentValues(); 

    valores.put("item", produtos.getItem()); 
    valores.put("coligada", produtos.getColigada()); 
    valores.put("filial", produtos.getFilial()); 

    bd.update("produtos2", valores, "_id = ?", new String[]{""+produtos.getId()}); 
} 


public void deletar(Produtos produtos){ 
    bd.delete("produtos2", "_id = "+produtos.getId(), null); 
} 


public List<Produtos> buscar(){ 
    List<Produtos> list = new ArrayList<Produtos>(); 
    String[] colunas = new String[]{"_id", "item", "coligada","filial"}; 

    Cursor cursor = bd.rawQuery("select * from produtos2",null); 

    if(cursor.getCount() > 0){ 
     cursor.moveToFirst(); 

     do{ 

      Produtos p = new Produtos(); 
      p.setId(cursor.getLong(0)); 
      p.setItem(cursor.getString(1)); 
      p.setColigada(cursor.getString(2)); 
      p.setFilial(cursor.getString(3)); 
      list.add(p); 

     }while(cursor.moveToNext()); 
    } 

    return(list); 
} 
      } 

Answer 1

我找到解决方案，创建一个全局类，并分配我的Spinner.toString（）的值;

感谢所有：d

Answer 2

您可以将其存储在共享preferences.Just复制下面的代码在一个新的类名为AppSharedPreferences

public class AppSharedPreferences { 
private SharedPreferences appSharedPrefs; 
private SharedPreferences.Editor prefsEditor; 
private static AppSharedPreferences appSharedPrefrence; 

public AppSharedPreferences(Context context) { 
    this.appSharedPrefs = context.getSharedPreferences("sharedpref", Context.MODE_PRIVATE); 
    this.prefsEditor = appSharedPrefs.edit(); 
} 

public static AppSharedPreferences getsharedprefInstance(Context con) { 
    if (appSharedPrefrence == null) 
     appSharedPrefrence = new AppSharedPreferences(con); 
    return appSharedPrefrence; 
} 

public SharedPreferences getAppSharedPrefs() { 
    return appSharedPrefs; 
} 

public void setAppSharedPrefs(SharedPreferences appSharedPrefs) { 
    this.appSharedPrefs = appSharedPrefs; 
} 

public SharedPreferences.Editor getPrefsEditor() { 
    return prefsEditor; 
} 

public void Commit() { 
    prefsEditor.commit(); 
} 

public void clearallSharedPrefernce() { 
    prefsEditor.clear(); 
    prefsEditor.apply(); 
} 
public void setSession(String session) 
{ 
    this.prefsEditor=appSharedPrefs.edit(); 
    prefsEditor.putString("session",session); 
    prefsEditor.apply(); 
} 
public String getSession() 
{ 
    return appSharedPrefs.getString("session",""); 
} 

}

并在你的课堂中使用它创建它的对象，如下所示 首先定义一个像这样的对象

AppSharedPreferences appSharedPreferences; 

然后实例像这样

appSharedPreferences = AppSharedPreferences.getsharedprefInstance(YourActivityName.this); 

，然后保存值调用setter方法

appSharedPreferences.setSession(your value); 

，同样使用getter方法得到的值回