安卓：问题与谷歌Admob的样本 [英] Android: Problem with Google Admob sample

问题描述

我试图创建只是最基本的一个示例应用程序的AdMob。我跟着指示，甚至复制大部分来自这个网站的code：的 HTTP：//$c$c.google.com/mobile/ads/docs/android/fundamentals.html ，但应用程序保持力关我的VD和我的真实设备上。调试器提供了一个RuntimeException的在该行：layout.addView（AD浏览报）。我敢肯定，有一个简单的解决办法，但我不能弄明白。我搜索周围，但大多数网上信息是pre-谷歌AdMob的 - 它使用了不同的方法。

I'm trying to create a sample admob application with just the bare essentials. I followed the directions and even copied most of the code from this site: http://code.google.com/mobile/ads/docs/android/fundamentals.html, but the app keeps force closing on my VD and on my real device. The debugger gives a "RuntimeException" at the line: layout.addView(adview). I'm sure there is a simple solution to this, but I can't figure it out. I've searched around, but most of the information online is for pre-google admob - which used a different procedure.

下面是我的MainActivity（我唯一的活动）：

Here is my MainActivity (my only Activity):

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

    // Create the adView
    AdView adView = new AdView(this, AdSize.BANNER, "a14dc6ed8aead31");
    LinearLayout layout = (LinearLayout)findViewById(R.layout.main);
    layout.addView(adView); //RuntimeException at this line
    AdRequest request = new AdRequest();
    request.setTesting(true);
    adView.loadAd(request);
}

这是我的错误的logcat输出：

Heres my logcat error output:

05-22 17：49：24.534：ERROR / AndroidRuntime（19619）：产生的原因：显示java.lang.NullPointerException

05-22 17:49:24.534: ERROR/AndroidRuntime(19619): Caused by: java.lang.NullPointerException

05-22 17：49：24.534：ERROR / AndroidRuntime（19619）：在com.example.admobsample.MainActivity.onCreate（MainActivity.java:22）

05-22 17:49:24.534: ERROR/AndroidRuntime(19619): at com.example.admobsample.MainActivity.onCreate(MainActivity.java:22)

05-22 17：49：24.534：ERROR / AndroidRuntime（19619）：在android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1047）

05-22 17:49:24.534: ERROR/AndroidRuntime(19619): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)

05-22 17：49：24.534：ERROR / AndroidRuntime（19619）：在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2544）

05-22 17:49:24.534: ERROR/AndroidRuntime(19619): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2544)

05-22 17：49：24.534：ERROR / AndroidRuntime（19619）：...... 11多个

05-22 17:49:24.534: ERROR/AndroidRuntime(19619): ... 11 more

05-22 17：49：26.024：ERROR / PackageInstallationReceiver（17825）：删除/data/local/tmp/com.example.admobsample.apk失败

05-22 17:49:26.024: ERROR/PackageInstallationReceiver(17825): Remove /data/local/tmp/com.example.admobsample.apk Fail!

推荐答案

在NPE是因为布局是空 ，也就是说，没有与ID没有意见 R.layout.main 。

The NPE happens because layout is null, i.e., there is no view with the ID R.layout.main.

国米preting最初的例子

Interpreting the original example

    // Lookup your LinearLayout assuming it’s been given
    // the attribute android:id="@+id/mainLayout"
    LinearLayout layout = (LinearLayout)findViewById(R.id.mainLayout);

您需要的属性机器人添加：ID 您的LinearLayout（ID应该是从 R.id.main ）。

you need to add the attribute android:id to your LinearLayout (the ID should be different from R.id.main).

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