Question

问题源于OK按钮可点击。当我点击按钮的那一刻（在EditTexts中存在/不存在文本和数字的情况下）应用程序停止工作。我似乎无法找到这个错误的来源。我已经对已经初始化的变量进行了双重检查，问题似乎并非源于那里。任何人都可以帮忙吗？

代码如下：

public void mInput(View view){
     final Dialog dialogManualInput = new Dialog(this);
     dialogManualInput.setContentView(R.layout.dialog_A);
     dialogManualInput.setTitle("Title");

     et1 = (EditText) dialogManualInput.findViewById(R.id.item);
     et2 = (EditText) dialogManualInput.findViewById(R.id.price);
     et3 = (EditText) dialogManualInput.findViewById(R.id.quantity);

     m_adapter = new ArrayAdapter<String>(this,R.layout.activity_A,m_listItems);
     checkoutList = (ListView)findViewById(R.id.listview);
     checkoutList.setAdapter(m_adapter);

     dialogManualInput.show();

     Button okButton = (Button) dialogManualInput.findViewById(R.id.ok);
     okButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

        String input_1 = et1.getText().toString();
        String input_2 = et2.getText().toString();
        String input_3 = et3.getText().toString();
        int int_1 = Integer.valueOf(et3);
        int int_2 = Integer.valueOf(et2);
        String input = "("+et2+")  " + et1 +"   "+ (int_1*int_2);
        if((null!=input_1)&&(null!=input_2)&&(null!=input_3)){
           m_listItems.add(input);
           m_adapter.notifyDataSetChanged();
        }
        dialogManualInput.dismiss();
      }
  });
}

这是logcat：

09-23 23:56:01.793    7464-7464/com.kwesimbia.management E/ArrayAdapter? You must supply a resource ID for a TextView
09-23 23:56:01.803    7464-7464/com.kwesimbia.management D/AndroidRuntime? Shutting down VM
09-23 23:56:01.803    7464-7464/com.kwesimbia.management W/dalvikvm? threadid=1: thread exiting with uncaught exception (group=0x40a99228)
09-23 23:56:01.843    7464-7464/com.kwesimbia.management E/AndroidRuntime?   FATAL EXCEPTION: main
    java.lang.IllegalStateException: ArrayAdapter requires the resource ID to be a TextView
        at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:386)
        at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362)
        at android.widget.AbsListView.obtainView(AbsListView.java:2046)
        at android.widget.ListView.makeAndAddView(ListView.java:1820)
        at android.widget.ListView.fillDown(ListView.java:672)
        at android.widget.ListView.fillFromTop(ListView.java:732)
        at android.widget.ListView.layoutChildren(ListView.java:1659)
        at android.widget.AbsListView.onLayout(AbsListView.java:1876)
        at android.view.View.layout(View.java:11425)
        at android.view.ViewGroup.layout(ViewGroup.java:4232)
        at android.widget.RelativeLayout.onLayout(RelativeLayout.java:925)
        at android.view.View.layout(View.java:11425)
        at android.view.ViewGroup.layout(ViewGroup.java:4232)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:431)
        at android.view.View.layout(View.java:11425)
        at android.view.ViewGroup.layout(ViewGroup.java:4232)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1628)
        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1486)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1399)
        at android.view.View.layout(View.java:11425)
        at android.view.ViewGroup.layout(ViewGroup.java:4232)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:431)
        at android.view.View.layout(View.java:11425)
        at android.view.ViewGroup.layout(ViewGroup.java:4232)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1509)
        at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2498)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:154)
        at android.app.ActivityThread.main(ActivityThread.java:4944)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:511)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
         at dalvik.system.NativeStart.main(Native Method)
         Caused by: java.lang.ClassCastException: android.widget.RelativeLayout cannot be cast to android.widget.TextView
        at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:379)
        ... 33 more
  09-23 23:56:01.873     239-1201/? E/EmbeddedLogger? App crashed! Process: com.kwesimbia.management
  09-23 23:56:01.873     239-1201/? E/EmbeddedLogger? App crashed! Package:    com.kwesimbia.management v1 (1.0)
  09-23 23:56:01.873     239-1201/? E/EmbeddedLogger? Application Label: abaawa
  09-23 23:56:01.873     239-1201/? W/ActivityManager? Force finishing activity          com.kwesimbia.management/.ArtActivity

Answer 1

问题可能在于您的布局。向我们展示这个XML文件“R.layout.activity_A”或者看看它。

Answer 2

编辑1：

从Logcat看来问题是

 m_adapter = new ArrayAdapter<String>(this,R.layout.activity_A,m_listItems);
 checkoutList = (ListView)findViewById(R.id.listview);
 checkoutList.setAdapter(m_adapter);

您正在提供m_listItems（我不知道这是什么）和它正在寻找 TextView 的id在

中传递textView的ID

 ArrayAdapter<String>(this,R.layout.activity_A,m_listItems);

有点像

 ArrayAdapter<String>(this,R.layout.activity_A,R.id.textView01);

可能的错误

这是什么让你直接将你的edittext与字符串连接起来，这可能应该是 int_1 ，或 et1.getText（）即 input_1

    String input = "("+et2+")  " + et1 +"   "+ (int_1*int_2);

对于et1，et2，et3，如果没有像往常那样初始化 NPE 或者

在这些中解析异常（如果你没有填充editText那么它必须抛出异常）

    int int_1 = Integer.valueOf(et3);
    int int_2 = Integer.valueOf(et2);

当我按下按钮从对话框返回活动时，我的应用程序不断崩溃

2 个答案: