Question

我在开发Android应用程序时遇到了问题。当我尝试检索多个EditText的值时，遇到NullPointerException。这就是我所拥有的：

 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LogCat：

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：

MeditText = (EditText) findViewById(R.id.editText);

没有view.findViewById工作。这没有产生任何错误。我正在尝试检索所有EditText值。关于这个问题的任何帮助将不胜感激。

多个EditTexts在ListView中导致NullPointerException

0 个答案: