的Android应用程序崩溃是由于加入了布局
问题描述：
我在我的java文件中的以下初始化：的Android应用程序崩溃是由于加入了布局
Button btnCalc = (Button) findViewById(R.id.btnCalculate);
final Button btnClearWin = (Button) findViewById(R.id.btnClear);
final Button btnSaveTrip = (Button) findViewById(R.id.btnSave);
final EditText nameOfInf = (EditText)findViewById(R.id.etName);
final EditText tollAmount = (EditText)findViewById(R.id.etToll);
final EditText showLog = (EditText)findViewById(R.id.etShowLog);
showLog.setFocusable(false);
final View lineView = (View) findViewById(R.id.vwLine);
final TextView tvTotalLabel = (TextView) findViewById(R.id.tvTotal);
final TextView tvTotalAmountLabel = (TextView) findViewById(R.id.tvTotalAmount);
final TextView tvNameLabel = (TextView) findViewById(R.id.tvName);
final TextView tvTollLabel = (TextView) findViewById(R.id.tvToll);
final RadioGroup rgTypeOfInf = (RadioGroup) findViewById(R.id.rgType);
final RadioGroup rgTypeOfTrip = (RadioGroup) findViewById(R.id.rgTripType);
本来一切工作正常，直到我把一些对象到不同的布局，是在main不再布局文件，现在我的应用程序FC打开时。
以下是不同的布局，result.xml。我必须分别初始化它们吗？
final EditText showLog = (EditText)findViewById(R.id.etShowLog);
showLog.setFocusable(false);
final Button btnClearWin = (Button) findViewById(R.id.btnClear);
final Button btnSaveTrip = (Button) findViewById(R.id.btnSave);
当我注释掉上述四行时，应用程序打开就好了。
的logcat：
07-25 10:27:27.955: E/AndroidRuntime(13791): FATAL EXCEPTION: main
07-25 10:27:27.955: E/AndroidRuntime(13791): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.testing/com.test.testing.MainActivity}: java.lang.NullPointerException
07-25 10:27:27.955: E/AndroidRuntime(13791): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2306)
07-25 10:27:27.955: E/AndroidRuntime(13791): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2356)
07-25 10:27:27.955: E/AndroidRuntime(13791): at android.app.ActivityThread.access$600(ActivityThread.java:150)
07-25 10:27:27.955: E/AndroidRuntime(13791): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244)
07-25 10:27:27.955: E/AndroidRuntime(13791): at android.os.Handler.dispatchMessage(Handler.java:99)
07-25 10:27:27.955: E/AndroidRuntime(13791): at android.os.Looper.loop(Looper.java:137)
07-25 10:27:27.955: E/AndroidRuntime(13791): at android.app.ActivityThread.main(ActivityThread.java:5195)
07-25 10:27:27.955: E/AndroidRuntime(13791): at java.lang.reflect.Method.invokeNative(Native Method)
07-25 10:27:27.955: E/AndroidRuntime(13791): at java.lang.reflect.Method.invoke(Method.java:511)
07-25 10:27:27.955: E/AndroidRuntime(13791): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
07-25 10:27:27.955: E/AndroidRuntime(13791): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
07-25 10:27:27.955: E/AndroidRuntime(13791): at dalvik.system.NativeStart.main(Native Method)
07-25 10:27:27.955: E/AndroidRuntime(13791): Caused by: java.lang.NullPointerException
07-25 10:27:27.955: E/AndroidRuntime(13791): at com.test.testing.MainActivity.onCreate(MainActivity.java:51)
07-25 10:27:27.955: E/AndroidRuntime(13791): at android.app.Activity.performCreate(Activity.java:5104)
07-25 10:27:27.955: E/AndroidRuntime(13791): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
07-25 10:27:27.955: E/AndroidRuntime(13791): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2260)
07-25 10:27:27.955: E/AndroidRuntime(13791): ... 11 more
07-25 10:27:27.963: W/ActivityManager(381): Force finishing activity com.test.testing/.MainActivity
07-25 10:27:28.517: W/ActivityManager(381): Activity pause timeout for ActivityRecord{4163fe28 u0 com.test.testing/.MainActivity}
07-25 10:27:28.666: I/qtaguid(381): Failed write_ctrl(s 0 10116) res=-1 errno=1
07-25 10:27:28.666: W/NetworkManagementSocketTagger(381): setKernelCountSet(10116, 0) failed with errno -1
07-25 10:27:38.666: W/ActivityManager(381): Activity destroy timeout for ActivityRecord{4163fe28 u0 com.test.testing/.MainActivity}
07-25 10:28:00.166: D/dalvikvm(2069): GC_CONCURRENT freed 3198K, 52% free 13534K/27904K, paused 3ms+3ms, total 29ms
07-25 10:28:00.166: D/dalvikvm(2069): WAIT_FOR_CONCURRENT_GC blocked 23ms
答
如果要使用除主布局以外的其他布局的视图，则需要对该布局进行充气。如果你不膨胀，直接用自己的观点，它会给NPE
示例代码：
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
RelativeLayout mFrame = (RelativeLayout)inflater.inflate(R.layout.results, null);
//Now you can use/reference its resources/views etc.
final EditText showLog = (EditText)mFrame.findViewById(R.id.etShowLog);
showLog.setFocusable(false);
final Button btnClearWin = (Button) mFrame.findViewById(R.id.btnClear);
final Button btnSaveTrip = (Button) mFrame.findViewById(R.id.btnSave);
答
在移动或重命名文件或资源之后，必须清理并构建新引用的项目。
答
对于使用setcontentview（布局）时的活动。只有您可以参考您的活动的xml布局视图。对于其他XML，您必须将该XML充当视图。
你是什么意思与“比其他主”？ – Warpzit
请发布logcat输出以及 –
您可以初始化布局xml中设置为该活动的视图。如果它在不同的xml中，并且你尝试初始化你的NPE。 – Raghunandan