启动自定义对话框

Question

我已经按照Android文档创建自定义对话框。当我点击启动我的自定义对话框的应用程序的按钮。崩溃。我如何开始排除故障？

对话框：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/relativeLayout1" android:gravity="center_vertical" android:layout_height="wrap_content" android:layout_width="fill_parent"> 
<CheckBox android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="@string/chkBlueTooth" android:id="@+id/chkBlueTooth" android:layout_below="@+id/chkAudio" android:layout_alignLeft="@+id/chkAudio"></CheckBox> 
<Button android:layout_height="wrap_content" android:layout_width="wrap_content" android:layout_below="@+id/chkBlueTooth" android:layout_alignLeft="@+id/chkBlueTooth" android:id="@+id/btnOK" android:text="@string/btnOK"></Button> 
<CheckBox android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="@string/chkNetwork" android:id="@+id/chkNetwork" android:layout_above="@+id/chkBlueTooth" android:layout_toRightOf="@+id/chkBlueTooth"></CheckBox> 
<CheckBox android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="@string/chkWifi" android:id="@+id/chkWifi" android:layout_below="@+id/chkNetwork" android:layout_alignLeft="@+id/chkNetwork" android:layout_alignRight="@+id/chkNetwork"></CheckBox> 
<CheckBox android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="@string/chkAudio" android:id="@+id/chkAudio" android:layout_below="@+id/txtChoose" android:layout_alignLeft="@+id/txtChoose"></CheckBox> 
</RelativeLayout> 

的代码的对话框： 静态最终诠释TIME_DIALOG_ID = 0; static final int POWER_OFF_OPTIONS = 1;

@Override 保护对话框onCreateDialog（int id）{ 对话框对话框; switch（id）{ case TIME_DIALOG_ID： return new TimePickerDialog（this， mTimeSetListener，mHour24，mMinute，false）;

 case POWER_OFF_OPTIONS: 
      AlertDialog.Builder builder; 
      AlertDialog alertDialog; 

      Context mContext = getApplicationContext(); 
      LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(LAYOUT_INFLATER_SERVICE); 
      View layout = inflater.inflate(R.layout.options, 
        (ViewGroup)findViewById(R.id.relativeLayout1)); 
      //Capture view elements 
      mChkAudio = (CheckBox) findViewById(R.id.chkAudio); 
      mChkBluetooth = (CheckBox) findViewById(R.id.chkBlueTooth); 
      mChkNetwork = (CheckBox) findViewById(R.id.chkNetwork); 
      mChkWifi = (CheckBox) findViewById(R.id.chkWifi); 
      mBtnOK = (Button) findViewById(R.id.btnOK); 
      mBtnOK.setOnClickListener(new View.OnClickListener() { 
       public void onClick(View v) { 
        DismissPowerOptions(); 
        } 
      }); 
      builder = new AlertDialog.Builder(mContext); 
      builder.setView(layout); 
      alertDialog = builder.create(); 
      //return builder; 
     default: 
      dialog = null; 
     } 
     return dialog; 
    } 

，显示的对话框和崩溃的应用程序的按钮：

mBtnPowerOffOptions.setOnClickListener(new View.OnClickListener() { 
     public void onClick(View v) { 
      //stuff for Options dialog 
      showDialog(POWER_OFF_OPTIONS); 
     } 
    }); 

Answer 1

你错了对象上调用findViewById;父视图（或活动）。

后builder.setView（...）做

 
      AlertDialog myDialog = builder.create(); 

现在你可以让你的调用findViewById

 
      //Capture view elements 
      mChkAudio = (CheckBox) myDialog.findViewById(R.id.chkAudio); 
       . 
       . 
       .