如何在点击按钮后打开自定义对话框

Question

这是我的用于自定义对话框的LinearLayout。

<EditText 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:inputType="phone" 
     android:textColor="@android:color/white" 
     android:hint="@string/enter_phone_number" 
     android:textColorHint="@android:color/white" 
     android:padding="15dp" 
     android:ems="10" 
     android:id="@+id/editNumber" 
     android:layout_gravity="center_horizontal" /> 

    <View 
     style="@style/HeaderDivider" /> 

    <EditText 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:inputType="textPersonName" 
     android:padding="15dp" 
     android:textColor="@android:color/white" 
     android:hint="@string/enter_name" 
     android:textColorHint="@android:color/white" 
     android:ems="10" 
     android:id="@+id/editName" 
     android:layout_gravity="center_horizontal" /> 
    <View 
     style="@style/HeaderDivider" /> 

    <TableRow 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:padding="10dp" 
     android:layout_gravity="center_horizontal" 
     android:weightSum="2"> 

     <Button 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="@string/ok" 
      android:background="@drawable/button_shape" 
      android:layout_weight="1" 
      android:id="@+id/edit" /> 

     <Button 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="@string/cancel" 
      android:background="@drawable/button_shape" 
      android:layout_weight="1" 
      android:id="@+id/cancel" /> 
    </TableRow> 

</LinearLayout> 

这是我的代码，我尝试创建自定义对话框：

public class SendMessage extends ActionBarActivity { 
private TextView friendNumber; 
private Button chooseNumber; 
private TextView friendName; 
private String phoneNo; 

private EditText editName; 
private EditText editNumber; 
private Button writeNumber; 
private Button okButton; 
private Button cancel; 

public Button checkNumber; 
private SharedPreferencesWrapper _spw; 
public static final int PICK_CONTACT = 1; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_send_message); 
    getSupportActionBar().setDisplayHomeAsUpEnabled(true); 
    TextView tv = (TextView) findViewById(R.id.edit_friend); 
    friendName = (TextView) findViewById(R.id.friendName); 
    _spw = new SharedPreferencesWrapper(SendMessage.this); 
    friendNumber = (TextView) findViewById(R.id.friend_number); 
    chooseNumber = (Button) findViewById(R.id.choose_number); 
    checkNumber = (Button) findViewById(R.id.check_number); 
    writeNumber = (Button) findViewById(R.id.write_number); 
    setTitle(R.string.title_section5); 

    chooseNumber.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      Intent intent = new Intent(Intent.ACTION_PICK); 
      intent.setType(ContactsContract.Contacts.CONTENT_TYPE); 
      startActivityForResult(intent, PICK_CONTACT); 

     } 
    }); 


    checkNumber.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      String phoneNumber = friendNumber.getText().toString(); 
      phoneNo = phoneNumber.replace(" ", "").replace("-", ""); 
      if(phoneNo.length() > 0 && friendName.getText().toString().length() > 0) { 
       if(phoneNo.length() >= 10) { 
        if (phoneNo.length() == 13) { 
         AsyncWebRequestsSender awrs = new AsyncWebRequestsSender(SendMessage.this, R.string.loading, R.string.getting_data); 
         awrs.execute(ISettings.Method_Invite, SendMessage.this, new CardHolder(_spw.getHolderId(), null, friendName.getText().toString(), null, new Card(null, phoneNo, null))); 
        } else { 
         int index = phoneNo.indexOf("0"); 
         String phone = phoneNo.substring(index + 1); 
         phoneNo = "+996" + phone; 
         AsyncWebRequestsSender awrs = new AsyncWebRequestsSender(SendMessage.this, R.string.loading, R.string.getting_data); 
         awrs.execute(ISettings.Method_Invite, SendMessage.this, new CardHolder(_spw.getHolderId(), null, friendName.getText().toString(), null, new Card(null, phoneNo, null))); 
        } 
       } 
       else 
        ToastHelper.show(SendMessage.this, R.string.please_check_number); 
      } 
      else{ 
       ToastHelper.show(SendMessage.this, R.string.please_enter_friend_name); 
      } 
     } 
    }); 
} 

public void editFriend(View view) throws IOException{ 
    try { 
     final Dialog dialog = new Dialog(SendMessage.this); 
     dialog.setContentView(R.layout.action_write_number); 
     dialog.setTitle("Title..."); 

     editNumber = (EditText) findViewById(R.id.editNumber); 
     editName = (EditText) findViewById(R.id.editName); 
     okButton = (Button) findViewById(R.id.edit); // here okButton = null 
     okButton.setOnClickListener(new View.OnClickListener() { // and here IO catch Exception (NullPointerException) 
      @Override 
      public void onClick(View v) { 
       String phone = editNumber.getText().toString(); 
       String name = editName.getText().toString(); 
       friendNumber.setText(phone); 
       friendName.setText(name); 
       dialog.dismiss(); 
      } 
     }); 
     cancel = (Button) findViewById(R.id.cancel); 
     cancel.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       dialog.dismiss(); 
      } 
     }); 
     dialog.show(); 
    } 
    catch (Exception e) { 
     String a = ""; 
    } 
} 

问题是 - 当我点击按钮异常捕捉NullPointerException异常，我没发现哪里是我的价值观不要初始化。请帮帮我。

Answer 1

不喜欢

editNumber = (EditText) dialog.findViewById(R.id.editNumber); 
editName = (EditText) dialog.findViewById(R.id.editName); 
okButton = (Button) dialog.findViewById(R.id.edit); 

在editFriend(View view)