Java 多个EditText会导致ListView中出现NullPointerException
我在开发Android应用程序时遇到了一个问题。当我尝试检索多个Java 多个EditText会导致ListView中出现NullPointerException,java,android,android-listview,android-edittext,Java,Android,Android Listview,Android Edittext,我在开发Android应用程序时遇到了一个问题。当我尝试检索多个EditTexts的值时,我遇到了一个NullPointerException。以下是我所拥有的: public void next(View v) { View view = (View)v.getParent(); MeditText = (EditText) view.findViewById(R.id.editText); Toast.makeText(getApplicationContext(
EditText
s的值时,我遇到了一个NullPointerException。以下是我所拥有的:
public void next(View v) {
View view = (View)v.getParent();
MeditText = (EditText) view.findViewById(R.id.editText);
Toast.makeText(getApplicationContext(), MeditText.getText().toString() + "", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(AddManually2.this, DatabaseFiller.class);
startActivity(intent);
}
这是我的日志:
01-28 19:22:31.663 20042-20042/com.example.foodsaver2 E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.example.foodsaver2, PID: 20042
java.lang.IllegalStateException: Could not execute method of the activity
at android.view.View$1.onClick(View.java:3823)
at android.view.View.performClick(View.java:4438)
at android.view.View$PerformClick.run(View.java:18422)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
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:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at android.view.View$1.onClick(View.java:3818)
at android.view.View.performClick(View.java:4438)
at android.view.View$PerformClick.run(View.java:18422)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
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:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.example.foodsaver2.AddManually2.next(AddManually2.java:133)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at android.view.View$1.onClick(View.java:3818)
at android.view.View.performClick(View.java:4438)
at android.view.View$PerformClick.run(View.java:18422)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
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:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
当我将代码更改为以下内容时:
MeditText = (EditText) findViewById(R.id.editText);
它没有
视图。findViewById
工作。这没有产生任何错误。我正在尝试检索所有EditText
值。任何有关此问题的帮助都将不胜感激。ListView中的EditText非常不鼓励,因为它会导致许多焦点问题。你应该考虑有不同的交互作用。你把冥想声明为编辑文本吗?@ JojangELSMA,是的,我有<代码>编辑文本冥想;在我的活动/课程中,我被你问题的措辞弄糊涂了。你说,“当我把代码改成这个:……它没有视图。findViewById起作用了”然后你说“它没有产生错误”……如果它没有产生错误,那么问题出在哪里?@JoshEngelsma好的,现在,我有了视图。findViewById
,它获取了所有的编辑文本。这会使应用程序崩溃。当我将此部分更改为只获取一个edittext的findViewById时,它就可以工作了。我想获得所有的编辑文本,因此,我需要查看.findViewById