的setContentView错误信息

问题描述：

当我尝试和测试我的应用我收到以下错误（S）：的setContentView错误信息

02-16 13:05:09.251: E/AndroidRuntime(1346): FATAL EXCEPTION: main 
02-16 13:05:09.251: E/AndroidRuntime(1346): Process: biz.midl.debteliminator, PID: 1346 
02-16 13:05:09.251: E/AndroidRuntime(1346): java.lang.RuntimeException: Unable to start activity ComponentInfo{biz.midl.debteliminator/biz.midl.debteliminator.MainActivity}: java.lang.RuntimeException: Binary XML file line #21: You must supply a layout_width attribute. 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.app.ActivityThread.access$800(ActivityThread.java:135) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.os.Handler.dispatchMessage(Handler.java:102) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.os.Looper.loop(Looper.java:136) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.app.ActivityThread.main(ActivityThread.java:5017) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at java.lang.reflect.Method.invokeNative(Native Method) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at java.lang.reflect.Method.invoke(Method.java:515) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at dalvik.system.NativeStart.main(Native Method) 
02-16 13:05:09.251: E/AndroidRuntime(1346): Caused by: java.lang.RuntimeException: Binary XML file line #21: You must supply a layout_width attribute. 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.content.res.TypedArray.getLayoutDimension(TypedArray.java:492) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.view.ViewGroup$LayoutParams.setBaseAttributes(ViewGroup.java:5948) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.view.ViewGroup$MarginLayoutParams.<init>(ViewGroup.java:6117) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.widget.LinearLayout$LayoutParams.<init>(LinearLayout.java:1831) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.widget.LinearLayout.generateLayoutParams(LinearLayout.java:1743) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.widget.LinearLayout.generateLayoutParams(LinearLayout.java:58) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:757) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:758) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.view.LayoutInflater.inflate(LayoutInflater.java:397) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.view.LayoutInflater.inflate(LayoutInflater.java:353) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:290) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.app.Activity.setContentView(Activity.java:1929) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at biz.midl.debteliminator.MainActivity.onCreate(MainActivity.java:25) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.app.Activity.performCreate(Activity.java:5231) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
02-16 13:05:09.251: E/AndroidRuntime(1346):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)

线（25）以下：

public class MainActivity extends Activity { 

double interestRate; 
double r, r1; 
int nRemaining, nStarting, nDifference, originalBalance, 
     outstandingBalance, originalTerm; 
double minPayment, newPayment, newPmt; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); //<------Error is here

我的布局被称为“主要”。

这里是我的情况下，清单中的错误是在这里：

<?xml version="1.0" encoding="utf-8"?>

<uses-sdk 
    android:minSdkVersion="14" 
    android:targetSdkVersion="19" /> 

<application 
    android:allowBackup="true" 
    android:icon="@drawable/ic_launcher" 
    android:label="@string/app_name" 
    android:theme="@style/AppTheme" > 
    <activity 
     android:name="biz.midl.debteliminator.MainActivity" 
     android:label="@string/app_name" 
     android:theme="@android:style/Theme.DeviceDefault.Light.NoActionBar.Fullscreen" > 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 

      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
</application>

我将不胜感激的任何援助。谢谢！

答

正如LogCat所说的，您需要在MainActivity的XML文件中定义android:layout_width参数。它应该位于您的res/layout/文件夹中，名称为activity_main.xml或类似名称。

答

你的日志说，你需要暗示布局：

Binary XML file line #21: You must supply a layout_width attribute

要做到这一点定位布局的XML文件，并添加以下行：

android:layout_width="fill_parent"

答

二进制XML文件中的行＃21：您必须提供layout_width属性

检查第21行的main.xml并确保该视图具有layout_width属性

的setContentView错误信息

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