我有在纵向模式下完美运行的 xml。但是我又为横向创建了一个文件夹作为 layout-land 并向其中添加了相同的 XML 并根据横向模式进行了一些更改，但是当我运行我的应用程序时出现以下错误。
03-18 09:30:59.276: E/AndroidRuntime(5753): FATAL EXCEPTION: main
03-18 09:30:59.276: E/AndroidRuntime(5753): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.netserv.Pungry/com.netserv.Pungry.RestaurantDetails}: java.lang.NullPointerException
03-18 09:30:59.276: E/AndroidRuntime(5753): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
03-18 09:30:59.276: E/AndroidRuntime(5753): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
03-18 09:30:59.276: E/AndroidRuntime(5753): at android.app.ActivityThread.access$600(ActivityThread.java:141)
03-18 09:30:59.276: E/AndroidRuntime(5753): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
03-18 09:30:59.276: E/AndroidRuntime(5753): at android.os.Handler.dispatchMessage(Handler.java:99)
03-18 09:30:59.276: E/AndroidRuntime(5753): at android.os.Looper.loop(Looper.java:137)
03-18 09:30:59.276: E/AndroidRuntime(5753): at android.app.ActivityThread.main(ActivityThread.java:5041)
03-18 09:30:59.276: E/AndroidRuntime(5753): at java.lang.reflect.Method.invokeNative(Native Method)
03-18 09:30:59.276: E/AndroidRuntime(5753): at java.lang.reflect.Method.invoke(Method.java:511)
03-18 09:30:59.276: E/AndroidRuntime(5753): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
03-18 09:30:59.276: E/AndroidRuntime(5753): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
03-18 09:30:59.276: E/AndroidRuntime(5753): at dalvik.system.NativeStart.main(Native Method)
03-18 09:30:59.276: E/AndroidRuntime(5753): Caused by: java.lang.NullPointerException
03-18 09:30:59.276: E/AndroidRuntime(5753): at com.netserv.Pungry.RestaurantDetails.onCreate(RestaurantDetails.java:44)
03-18 09:30:59.276: E/AndroidRuntime(5753): at android.app.Activity.performCreate(Activity.java:5104)
03-18 09:30:59.276: E/AndroidRuntime(5753): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
03-18 09:30:59.276: E/AndroidRuntime(5753): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
03-18 09:30:59.276: E/AndroidRuntime(5753): ... 11 more
这是 XML。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="right"
android:orientation="vertical"
android:weightSum="1.0" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:background="@color/headerbgcolor"
android:weightSum="1.0"
>
<Button
android:id="@+id/restaurant_back"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.2"
android:text="@string/back" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="0.6"
android:gravity="center"
android:text="@string/restauran_details" />
<Button
android:id="@+id/restaurant_home"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.2"
android:text="@string/home" />
</LinearLayout>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
<Button
android:id="@+id/Refresh"
android:layout_width="wrap_content"
android:layout_height="20dp"
android:gravity="left"
android:text="@string/refresh" />
</RelativeLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:weightSum="1">
<TextView
android:layout_width="fill_parent"
android:layout_height="30dp"
android:text="@string/restaurant_name"
/>
<TextView
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:text="@string/restaurant_address" />
</LinearLayout>
<ScrollView
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="200dp"
android:orientation="vertical"
android:weightSum="1" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/restaurant_rating"
android:layout_weight="0.1" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/restaurant_timings"
android:layout_weight="0.1" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/cost_for_two"
android:layout_weight="0.1" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/restaurant_cuisine"
android:layout_weight="0.1" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/restaurant_location"
android:layout_weight="0.1" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/restaurant_city"
android:layout_weight="0.1" />
</LinearLayout>
</ScrollView>
<TextView
android:layout_width="fill_parent"
android:layout_height="20dp"
android:text="@string/restaurant_phone"
/>
<!-- <RelativeLayout -->
<!-- android:layout_width="fill_parent" -->
<!-- android:layout_height="wrap_content" > -->
<!-- <ImageView -->
<!-- android:id="@+id/imageView1" -->
<!-- android:layout_width="fill_parent" -->
<!-- android:layout_height="wrap_content" -->
<!-- android:layout_alignParentBottom="true" -->
<!-- android:background="#808000" -->
<!-- android:src="@drawable/btn_bg_cuisine" /> -->
<!-- </RelativeLayout> -->
</LinearLayout>
这是我的 RestaurantDetails 课程
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.restaurantdetails);
btnback = (Button) findViewById(R.id.back);
btnhome = (Button) findViewById(R.id.restaurant_home);
btnRefresh = (Button) findViewById(R.id.Refresh);
btnRefresh.setVisibility(View.GONE);
Restaurant_name = (TextView) findViewById(R.id.Restaurant_name);
Restaurant_add = (TextView) findViewById(R.id.Restaurant_add);
Restaurant_costfortwo = (TextView) findViewById(R.id.Restaurant_cstfortwo);
Restaurant_rating = (TextView) findViewById(R.id.Restaurant_rating);
Restaurant_timings = (TextView) findViewById(R.id.Restaurant_timings);
Restaurant_phone = (TextView) findViewById(R.id.Restaurant_phone);
Restaurant_phone.setAutoLinkMask(Linkify.PHONE_NUMBERS);
Restaurant_phone.setLinksClickable(true);
Restaurant_Locationname = (TextView) findViewById(R.id.Restaurant_location);
Restaurant_cityname = (TextView) findViewById(R.id.Restaurant_city);
Restaurant_cuisinename = (TextView) findViewById(R.id.Restaurant_cuisine);
imgfooter = (ImageView) findViewById(R.id.footerimage);
btnhome.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
startActivity(new Intent(RestaurantDetails.this, Home.class));
}
});
Restaurant_name.setText(GlobVariables.restaurant_response
.get(GlobVariables.RestaurantName).restaurant_name);
Restaurant_add.setText(GlobVariables.restaurant_response
.get(GlobVariables.RestaurantName).address);
Restaurant_costfortwo.setText(GlobVariables.restaurant_response
.get(GlobVariables.RestaurantName).costoftwo);
Restaurant_rating.setText(GlobVariables.restaurant_response
.get(GlobVariables.RestaurantName).rating);
Restaurant_timings.setText(GlobVariables.restaurant_response
.get(GlobVariables.RestaurantName).timings);
Restaurant_phone.setText(GlobVariables.restaurant_response
.get(GlobVariables.RestaurantName).Phone);
Restaurant_Locationname.setText(GlobVariables.restaurant_response
.get(GlobVariables.RestaurantName).Location_name);
Restaurant_cityname.setText(GlobVariables.restaurant_response
.get(GlobVariables.RestaurantName).city_name);
Restaurant_cuisinename.setText(GlobVariables.restaurant_response
.get(GlobVariables.RestaurantName).Cuisine_name);
我能知道我在做什么错吗？..谢谢:)