Google Android - это несложно

Код: Выделить всё

<?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">
<ListView
 android:id="@+id/lvMain"
 android:layout_width="match_parent"
 android:layout_height="wrap_content">
</ListView>
</LinearLayout>

Код: Выделить всё

package com.example.p0421_simplelist;

/**package ru.startandroid.develop.p0421simplelist; - ет строка с примера с сайта*/

import android.app.Activity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class MainActivity extends Activity {

  String[] names = { "Иван", "Марья", "Петр", "Антон", "Даша", "Борис",
      "Костя", "Игорь", "Анна", "Денис", "Андрей" };

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

    // находим список
    ListView lvMain = (ListView) findViewById(R.id.lvMain);

    // создаем адаптер
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
        android.R.layout.simple_list_item_1, names);

    // присваиваем адаптер списку
    lvMain.setAdapter(adapter);

  }
}

Код: Выделить всё

<?xml version="1.0" encoding="utf-8"?>
<TextView
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/textView1"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:gravity="center_horizontal"
 android:padding="5dp"
 android:text="TextView"
 android:textColor="#00FF00"
 android:textSize="24sp">
</TextView>

Код: Выделить всё

08-21 11:28:51.988: E/AndroidRuntime(292): FATAL EXCEPTION: main
08-21 11:28:51.988: E/AndroidRuntime(292): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.p0421_simplelist/com.example.p0421_simplelist.MainActivity}: java.lang.NullPointerException
08-21 11:28:51.988: E/AndroidRuntime(292): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
08-21 11:28:51.988: E/AndroidRuntime(292): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
08-21 11:28:51.988: E/AndroidRuntime(292): 	at android.app.ActivityThread.access$1500(ActivityThread.java:117)
08-21 11:28:51.988: E/AndroidRuntime(292): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
08-21 11:28:51.988: E/AndroidRuntime(292): 	at android.os.Handler.dispatchMessage(Handler.java:99)
08-21 11:28:51.988: E/AndroidRuntime(292): 	at android.os.Looper.loop(Looper.java:123)
08-21 11:28:51.988: E/AndroidRuntime(292): 	at android.app.ActivityThread.main(ActivityThread.java:3683)
08-21 11:28:51.988: E/AndroidRuntime(292): 	at java.lang.reflect.Method.invokeNative(Native Method)
08-21 11:28:51.988: E/AndroidRuntime(292): 	at java.lang.reflect.Method.invoke(Method.java:507)
08-21 11:28:51.988: E/AndroidRuntime(292): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
08-21 11:28:51.988: E/AndroidRuntime(292): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
08-21 11:28:51.988: E/AndroidRuntime(292): 	at dalvik.system.NativeStart.main(Native Method)
08-21 11:28:51.988: E/AndroidRuntime(292): Caused by: java.lang.NullPointerException
08-21 11:28:51.988: E/AndroidRuntime(292): 	at com.example.p0421_simplelist.MainActivity.onCreate(MainActivity.java:26)
08-21 11:28:51.988: E/AndroidRuntime(292): 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-21 11:28:51.988: E/AndroidRuntime(292): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
08-21 11:28:51.988: E/AndroidRuntime(292): 	... 11 more