linearLayout不包含在R java文件中

时间:2014-04-20 02:48:25

标签: java android android-layout

所以我按照这里找到的教程:developer site

我的代码如下所示

import android.os.Bundle;
import android.app.Activity;
import android.widget.LinearLayout;

import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdSize;
import com.google.android.gms.ads.AdView;

// A simple {@link Activity} that embeds an AdView.
public class MainActivity extends Activity {
  // The view to show the ad.
  private AdView adView;

  // Your ad unit id. Replace with your actual ad unit id.
  private static final String AD_UNIT_ID = "INSERT_YOUR_AD_UNIT_ID_HERE";

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

    // Create an ad.
    adView = new AdView(this);
    adView.setAdSize(AdSize.BANNER);
    adView.setAdUnitId(AD_UNIT_ID);

    // Add the AdView to the view hierarchy. The view will have no size
    // until the ad is loaded.
    LinearLayout layout = (LinearLayout) findViewById(R.id.linearLayout);
    layout.addView(adView);

    // Create an ad request. Check logcat output for the hashed device ID to
    // get test ads on a physical device.
    AdRequest adRequest = new AdRequest.Builder()
        .addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
        .addTestDevice("INSERT_YOUR_HASHED_DEVICE_ID_HERE")
        .build();

    // Start loading the ad in the background.
    adView.loadAd(adRequest);
  }

  @Override
  public void onResume() {
    super.onResume();
    if (adView != null) {
      adView.resume();
    }
  }

  @Override
  public void onPause() {
    if (adView != null) {
      adView.pause();
    }
    super.onPause();
  }

  // Called before the activity is destroyed.
  @Override
  public void onDestroy() {
    // Destroy the AdView.
    if (adView != null) {
      adView.destroy();
    }
    super.onDestroy();
  }
}

但是,我收到一个未解决的错误,导致我无法测试该应用。在线

LinearLayout layout = (LinearLayout) findViewById(R.id.linearLayout);

我收到有关linearLayout未解决的错误消息。 R和R.id很好。当我查看我的R.java时,确实没有linearLayout。显然我不想把它放在那里,因为生成了R.java。

我仍然是Android开发的新手,我不知道如何解决这个问题。你如何把东西包括在R.java中?我已经尝试编辑activity_main.xml等文件以包含linearLayout,但是当我这样做并且我尝试运行我的应用程序时,我得到“安装错误:未知错误。请检查logcat以获取更多详细信息。”。当我看到它时,我不知道logcat试图告诉我什么。我有“import android.widget.LinearLayout”。我不知道该做什么/我做错了什么。

1 个答案:

答案 0 :(得分:0)

你在解决这个问题上做了一些工作。比如

1)可能无法识别LinearLayout的id linearLayout 2)导入LinearLayout类 3)你做清理项目。 4)你删除bin和gen文件夹