Android NullPointerException我可以´；不要加载列表视图。失去了两天，请帮帮我

LogCat

    02-20 21:43:55.316: E/salida cursor(1564): recorrido finalizado
    02-20 21:43:55.316: D/AndroidRuntime(1564): Shutting down VM
    02-20 21:43:55.316: W/dalvikvm(1564): threadid=1: thread exiting with uncaught exception              (group=0x40028a00)
    02-20 21:43:55.336: E/AndroidRuntime(1564): FATAL EXCEPTION: main
    02-20 21:43:55.336: E/AndroidRuntime(1564): java.lang.RuntimeException: Unable to start                    activity ComponentInfo{es.garman.waypoints/es.garman.waypoints.ListaLugaresActivity}:    java.lang.NullPointerException
   02-20 21:43:55.336: E/AndroidRuntime(1564):  at   android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2781)
   02-20 21:43:55.336: E/AndroidRuntime(1564):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2797)
   02-20 21:43:55.336: E/AndroidRuntime(1564):  at android.app.ActivityThread.access$2300(ActivityThread.java:135)
   02-20 21:43:55.336: E/AndroidRuntime(1564):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2132)
   02-20 21:43:55.336: E/AndroidRuntime(1564):  at android.os.Handler.dispatchMessage(Handler.java:99)
   02-20 21:43:55.336: E/AndroidRuntime(1564):  at android.os.Looper.loop(Looper.java:143)
   02-20 21:43:55.336: E/AndroidRuntime(1564):  at android.app.ActivityThread.main(ActivityThread.java:4914)
   02-20 21:43:55.336: E/AndroidRuntime(1564):  at java.lang.reflect.Method.invokeNative(Native Method)
   02-20 21:43:55.336: E/AndroidRuntime(1564):  at java.lang.reflect.Method.invoke(Method.java:521)
   02-20 21:43:55.336: E/AndroidRuntime(1564):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
   02-20 21:43:55.336: E/AndroidRuntime(1564):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
   02-20 21:43:55.336: E/AndroidRuntime(1564):  at dalvik.system.NativeStart.main(Native Method)
   02-20 21:43:55.336: E/AndroidRuntime(1564): Caused by: java.lang.NullPointerException
   02-20 21:43:55.336: E/AndroidRuntime(1564):  at es.garman.waypoints.ListaLugaresActivity.cargarLista(ListaLugaresActivity.java:59)
   02-20 21:43:55.336: E/AndroidRuntime(1564):  at es.garman.waypoints.ListaLugaresActivity.onCreate(ListaLugaresActivity.java:34)
   02-20 21:43:55.336: E/AndroidRuntime(1564):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1065)
   02-20 21:43:55.336: E/AndroidRuntime(1564):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2745)
   02-20 21:43:55.336: E/AndroidRuntime(1564):  ... 11 more
   02-20 21:44:30.756: I/Process(1564): Sending signal. PID: 1564 SIG: 9

ListaLugaresActivity.java

public class WaypointRegistro {
private int id;
private String nombre;
private String descripcion;

public WaypointRegistro(){}
public WaypointRegistro(int id, String nombre, String descripcion){
    setId(id);
    setNombre(nombre);
    setDescripcion(descripcion);
}
public int getId() {
   return id;
}
public void setId(int id) {
   this.id = id;
}
public String getNombre() {
   return nombre;
}
public void setNombre(String nombre) {
   this.nombre = nombre;
}
public String getDescripcion() {
   return descripcion;
}
public void setDescripcion(String email) {
   this.descripcion = email;
}   

}

WaypointRegistro.java

public class WaypointRegistro {
private int id;
private String nombre;
private String descripcion;

public WaypointRegistro(){}
public WaypointRegistro(int id, String nombre, String descripcion){
    setId(id);
    setNombre(nombre);
    setDescripcion(descripcion);
}
public int getId() {
   return id;
}
public void setId(int id) {
   this.id = id;
}
public String getNombre() {
   return nombre;
}
public void setNombre(String nombre) {
   this.nombre = nombre;
}
public String getDescripcion() {
   return descripcion;
}
public void setDescripcion(String email) {
   this.descripcion = email;
}   

}

lista_fila.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >

<LinearLayout 
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:paddingRight="4dp">
    <TextView 
        android:id="@+id/idLista"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="16sp"
        android:padding="3dp"
        />

    </LinearLayout>
        <LinearLayout 
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:paddingBottom="5dp">
            <TextView 
                android:id="@+id/nombreLista"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="20sp"
                />
            <TextView 
                android:id="@+id/descripcionLista"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="14sp"
                />
    </LinearLayout>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" 
>
<TextView 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:layout_margin="10dp"
    android:layout_marginBottom="10dp"
    android:text="@string/txt_tituloLista"
    android:textColor="#FF4201"
    android:textSize="25sp"
    android:textStyle="bold"
    />
<ListView 
    android:id="@android:id/list"
    android:layout_width="fill_parent"
    android:layout_weight="1"
    android:layout_height="fill_parent"
    android:padding="5dp">
</ListView>

    <TextView 
        android:id="@+id/android:empty"
        android:text="@string/txt_empty"
        android:layout_height="fill_parent"
        android:layout_width="fill_parent"
        />

</LinearLayout>

lista_pantalla.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >

<LinearLayout 
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:paddingRight="4dp">
    <TextView 
        android:id="@+id/idLista"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="16sp"
        android:padding="3dp"
        />

    </LinearLayout>
        <LinearLayout 
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:paddingBottom="5dp">
            <TextView 
                android:id="@+id/nombreLista"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="20sp"
                />
            <TextView 
                android:id="@+id/descripcionLista"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="14sp"
                />
    </LinearLayout>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" 
>
<TextView 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:layout_margin="10dp"
    android:layout_marginBottom="10dp"
    android:text="@string/txt_tituloLista"
    android:textColor="#FF4201"
    android:textSize="25sp"
    android:textStyle="bold"
    />
<ListView 
    android:id="@android:id/list"
    android:layout_width="fill_parent"
    android:layout_weight="1"
    android:layout_height="fill_parent"
    android:padding="5dp">
</ListView>

    <TextView 
        android:id="@+id/android:empty"
        android:text="@string/txt_empty"
        android:layout_height="fill_parent"
        android:layout_width="fill_parent"
        />

</LinearLayout>

---

列表A

为空

将此添加到您的

onCreate（）

：

public void onCreate（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.lista_pantalla）；
lista=getListView（）；//您得到的是NullPointerException，因为
lista
为空，只需在设置setAdapter之前初始化
lista
：

lista=ListaLugaresActivity.this.getListView();
lista.setAdapter(adaptador); 

可能是您没有初始化列表视图您的代码可读性很好，例如：das was icher sage，denn deine variablen namen sind einfach für keinen verständlich。

只要您不懂德语，您就无法理解我，那么您希望这里的人怎么理解您的变量/类名？