我在资源目录中创建了一个字符串数组,其中包含三项值。然后尝试将数组放入字符串x中。它不会显示任何错误,但会崩溃。
String x[]= getResources().getStringArray(R.array.z_array);
String y[]={"1","2","3"};
enter code here
字符串数组代码如下-
<string-array name="z_array">
<item>a</item>
<item>b</item>
<item>c</item>
如果我使用
String x[]= {"a","b","c"};
它工作得很好。
这是我的自定义适配器代码-
public class MyCustomAdapter extends ArrayAdapter{
public MyCustomAdapter(Context context, int textViewResourceId,
String[] objects,String[] objects2){
super(context, textViewResourceId, objects);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
return getCustomView(position, convertView, parent);
}
public View getCustomView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = getLayoutInflater();
View view = inflater.inflate(R.layout.activity_list_view, parent, false);
TextView nameV= (TextView) view.findViewById(R.id.uuuu);
nameV.setText(x[position]);
TextView authorNameV = (TextView) view.findViewById(R.id.vvvv);
authorNameV.setText(y[position]);
switch (position) {
default:
break;
}
return view ;
}
}
我的问题是如何使用资源中的字符串数组声明数组?
Logcat公司
02-25 03:45:34.851 5845-5845/? E/memtrack: Couldn't load memtrack module (No such file or directory)
02-25 03:45:34.851 5845-5845/? E/android.os.Debug: failed to load memtrack module: -2
02-25 03:45:40.011 5857-5857/? E/memtrack: Couldn't load memtrack module (No such file or directory)
02-25 03:45:40.011 5857-5857/? E/android.os.Debug: failed to load memtrack module: -2
02-25 03:45:40.741 5870-5870/? E/memtrack: Couldn't load memtrack module (No such file or directory)
02-25 03:45:40.741 5870-5870/? E/android.os.Debug: failed to load memtrack module: -2
02-25 03:45:40.931 5881-5881/? E/AndroidRuntime: in writeCrashedAppName, pkgName :maruf.infinity.story.englishshortstories
02-25 03:45:40.931 5881-5881/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: maruf.infinity.story.englishshortstories, PID: 5881
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{maruf.infinity.story.englishshortstories/maruf.infinity.story.englishshortstories.MainActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2121)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5021)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:827)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:643)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at android.content.ContextWrapper.getResources(ContextWrapper.java:89)
at android.view.ContextThemeWrapper.getResources(ContextThemeWrapper.java:78)
at android.support.v7.app.AppCompatActivity.getResources(AppCompatActivity.java:542)
at maruf.infinity.story.englishshortstories.MainActivity.<init>(MainActivity.java:35)
at java.lang.Class.newInstanceImpl(Native Method)
at java.lang.Class.newInstance(Class.java:1208)
at android.app.Instrumentation.newActivity(Instrumentation.java:1064)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2112)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)Â
at android.app.ActivityThread.access$800(ActivityThread.java:135)Â
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)Â
at android.os.Handler.dispatchMessage(Handler.java:102)Â
at android.os.Looper.loop(Looper.java:136)Â
at android.app.ActivityThread.main(ActivityThread.java:5021)Â
at java.lang.reflect.Method.invokeNative(Native Method)Â
at java.lang.reflect.Method.invoke(Method.java:515)Â
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:827)Â
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:643)Â
at dalvik.system.NativeStart.main(Native Method)Â
02-25 03:45:41.311 5898-5898/? E/AndroidRuntime: in writeCrashedAppName, pkgName :maruf.infinity.story.englishshortstories
02-25 03:45:41.311 5898-5898/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: maruf.infinity.story.englishshortstories, PID: 5898
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{maruf.infinity.story.englishshortstories/maruf.infinity.story.englishshortstories.MainActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2121)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5021)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:827)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:643)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at android.content.ContextWrapper.getResources(ContextWrapper.java:89)
at android.view.ContextThemeWrapper.getResources(ContextThemeWrapper.java:78)
at android.support.v7.app.AppCompatActivity.getResources(AppCompatActivity.java:542)
at maruf.infinity.story.englishshortstories.MainActivity.<init>(MainActivity.java:35)
at java.lang.Class.newInstanceImpl(Native Method)
at java.lang.Class.newInstance(Class.java:1208)
at android.app.Instrumentation.newActivity(Instrumentation.java:1064)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2112)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)Â
at android.app.ActivityThread.access$800(ActivityThread.java:135)Â
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)Â
at android.os.Handler.dispatchMessage(Handler.java:102)Â
at android.os.Looper.loop(Looper.java:136)Â
at android.app.ActivityThread.main(ActivityThread.java:5021)Â
at java.lang.reflect.Method.invokeNative(Native Method)Â
at java.lang.reflect.Method.invoke(Method.java:515)Â
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:827)Â
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:643)Â
at dalvik.system.NativeStart.main(Native Method)Â
02-25 03:45:41.451 5910-5910/? E/AndroidRuntime: in writeCrashedAppName, pkgName :maruf.infinity.story.englishshortstories
02-25 03:45:41.451 5910-5910/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: maruf.infinity.story.englishshortstories, PID: 5910
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{maruf.infinity.story.englishshortstories/maruf.infinity.story.englishshortstories.MainActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2121)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5021)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:827)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:643)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at android.content.ContextWrapper.getResources(ContextWrapper.java:89)
at android.view.ContextThemeWrapper.getResources(ContextThemeWrapper.java:78)
at android.support.v7.app.AppCompatActivity.getResources(AppCompatActivity.java:542)
at maruf.infinity.story.englishshortstories.MainActivity.<init>(MainActivity.java:35)
at java.lang.Class.newInstanceImpl(Native Method)
at java.lang.Class.newInstance(Class.java:1208)
at android.app.Instrumentation.newActivity(Instrumentation.java:1064)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2112)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)Â
at android.app.ActivityThread.access$800(ActivityThread.java:135)Â
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)Â
at android.os.Handler.dispatchMessage(Handler.java:102)Â
at android.os.Looper.loop(Looper.java:136)Â
at android.app.ActivityThread.main(ActivityThread.java:5021)Â
at java.lang.reflect.Method.invokeNative(Native Method)Â
at java.lang.reflect.Method.invoke(Method.java:515)Â
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:827)Â
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:643)Â
at dalvik.system.NativeStart.main(Native Method)Â
