Erro projeto VENDAS - setadapter
A seguir, problema de erro, no projeto VENDA, conforme o curso, sendo:
-- Execução no TABLET - Samsung Galaxy Note
-- O ADT é da última versão, baixada no site oficial
-- (! No projeto tem outro erro, no evento de Salvar_Click com o LocationManager, porém vou deixar resolver este primeiro para partir para a segunda questão !)
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---- LOGCAT
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06-24 11:55:06.707: E/AndroidRuntime(15080): FATAL EXCEPTION: main
06-24 11:55:06.707: E/AndroidRuntime(15080): java.lang.RuntimeException: Unable to start activity ComponentInfo{br.com.daq.curso.vendas/br.com.daq.curso.vendas.NovaVendaActivity}: java.lang.NullPointerException
06-24 11:55:06.707: E/AndroidRuntime(15080): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2294)
06-24 11:55:06.707: E/AndroidRuntime(15080): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2348)
06-24 11:55:06.707: E/AndroidRuntime(15080): at android.app.ActivityThread.access$700(ActivityThread.java:159)
06-24 11:55:06.707: E/AndroidRuntime(15080): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316)
06-24 11:55:06.707: E/AndroidRuntime(15080): at android.os.Handler.dispatchMessage(Handler.java:99)
06-24 11:55:06.707: E/AndroidRuntime(15080): at android.os.Looper.loop(Looper.java:137)
06-24 11:55:06.707: E/AndroidRuntime(15080): at android.app.ActivityThread.main(ActivityThread.java:5414)
06-24 11:55:06.707: E/AndroidRuntime(15080): at java.lang.reflect.Method.invokeNative(Native Method)
06-24 11:55:06.707: E/AndroidRuntime(15080): at java.lang.reflect.Method.invoke(Method.java:525)
06-24 11:55:06.707: E/AndroidRuntime(15080): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1187)
06-24 11:55:06.707: E/AndroidRuntime(15080): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
06-24 11:55:06.707: E/AndroidRuntime(15080): at dalvik.system.NativeStart.main(Native Method)
06-24 11:55:06.707: E/AndroidRuntime(15080): Caused by: java.lang.NullPointerException
06-24 11:55:06.707: E/AndroidRuntime(15080): at br.com.daq.curso.vendas.NovaVendaActivity.onCreate(NovaVendaActivity.java:66)
06-24 11:55:06.707: E/AndroidRuntime(15080): at android.app.Activity.performCreate(Activity.java:5372)
06-24 11:55:06.707: E/AndroidRuntime(15080): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1104)
06-24 11:55:06.707: E/AndroidRuntime(15080): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2257)
06-24 11:55:06.707: E/AndroidRuntime(15080): ... 11 more
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--- EXTRATO DE NovaVendaActivity.java
--- A linha 66, apontada no LOGCAT, refere-se spProdutos.setAdapter(ad)
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@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_nova_venda);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
//criando objeto Spinner
Spinner spProdutos = (Spinner)findViewById(R.id.spProdutos);
//abrindo o banco de dados
SQLiteDatabase db = openOrCreateDatabase("vendas.db", Context.MODE_PRIVATE, null);
//criando cursor
Cursor cursor = db.rawQuery("SELECT * FROM produtos ORDER BY nome ASC", null);
//Matriz tipo string com os campos que deseja retornar
String[] from = {"_id","nome","preco"};
//Matriz de destino
int[] to = {R.id.txvLayoutID,R.id.txvLayoutNome,R.id.txvLayoutPreco};
//Criando um adpatador para inserir os dados no spinner. Não insere direto
//Necessario criar um arquivo XML que sirva de adaptor para o spinner
//Criado arquivo ANDROID XML LAYOUT - nome:spinner.xml
//Adpater -> contexto, layout, cursor (de onde), quais campos, para onde vai
SimpleCursorAdapter ad = new SimpleCursorAdapter(
getBaseContext(),R.layout.spinner_layout,
cursor,from,to
);
//Faz a adaptacao
// ********************************************
// Erro nesta linha - não passa dela --- LINHA 66 - abaixo
spProdutos.setAdapter(ad);
// Se a linha 66 for comentada, segue normalmente, mas claro que sem a lista de produtos no spinner
// ********************************************
db.close();
}
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-- Spinner_layout.xml
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android:layout_height="match_parent"
android:orientation="vertical" >
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"
android:text="TextView" />
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"
android:text="TextView" />
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-- Manifest.xml
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android:versionCode="1"
android:versionName="1.0" >
android:targetSdkVersion="14" />
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
android:label="@string/app_name" >
android:label="@string/title_activity_nova_venda" >
