Question

我有两个活动，其中＆＃34; SecondActivity＆＃34;有一个Spinner，Spinner上的选定项目被发送到＆＃34; TerceiraActivity＆＃34;

但是，我想让Spinner上选择的项目变为全局变量，所以我将这个变量放在其他类中，称为＆＃34; BD.class＆＃34;

这是＆＃34; SecondActivity＆＃34;

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＆＃34; TerceiraActivity＆＃34;

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扩展了Activity {

@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＆＃34; BD.class＆＃34;

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

您可以将其存储在共享首选项中。只需将以下代码复制到名为AppSharedPreferences的新类中

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","");
}

}

并在你的类中使用它创建它的对象就像这样首先定义一个这样的对象

AppSharedPreferences appSharedPreferences;

然后像这样实例化

appSharedPreferences = AppSharedPreferences.getsharedprefInstance(YourActivityName.this);

然后保存值调用setter方法

appSharedPreferences.setSession(your value);

并类似地使用getter方法获取值

Answer 2

我找到了解决方案，创建了一个Global Class，并分配了我的Spinner.toString（）的值;

谢谢大家：D

在Spinner上选择的项目是全局的 - Android

2 个答案: