[Android] 如何在警报对话框中添加两个编辑文本字段


Answers

在警告框中检查此代码有编辑textview时单击确定它显示在屏幕上使用吐司。

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    final AlertDialog.Builder alert = new AlertDialog.Builder(this);
    final EditText input = new EditText(this);
    alert.setView(input);
    alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int whichButton) {
            String value = input.getText().toString().trim();
            Toast.makeText(getApplicationContext(), value, 
                Toast.LENGTH_SHORT).show();
        }
    });

    alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int whichButton) {
            dialog.cancel();
        }
    });
    alert.show();               
}
Question

我正在尝试使用一个警告对话框在Android中提示输入用户名和密码。 我在这里找到了这个代码

  if (token.equals("Not Found"))
    {
        LayoutInflater factory = LayoutInflater.from(this);            
        final View textEntryView = factory.inflate(R.layout.userpasslayout, null);

        AlertDialog.Builder alert = new AlertDialog.Builder(this); 

        alert.setTitle("Please Login to Fogbugz"); 
        alert.setMessage("Enter your email and password"); 
        // Set an EditText view to get user input  
        alert.setView(textEntryView); 
        AlertDialog loginPrompt = alert.create();

        final EditText input1 = (EditText) loginPrompt.findViewById(R.id.username);
        final EditText input2 = (EditText) loginPrompt.findViewById(R.id.password);

        alert.setPositiveButton("Login", new DialogInterface.OnClickListener() { 
        public void onClick(DialogInterface dialog, int whichButton) { 
            input1.getText().toString(); **THIS CRASHES THE APPLICATION**


        } 
        }); 

        alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { 
          public void onClick(DialogInterface dialog, int whichButton) { 
            // Canceled. 
          } 
        }); 

        alert.show(); 

    }

编辑:我能够设置正确的布局,但当我尝试访问文本字段时收到错误。 这里有什么问题?




我发现另外一个例子来定制一个名叫Mossila的人的AlertDialog。 我认为他们比谷歌的例子好。 要快速查看Google的API演示,您必须将其演示jar导入到您可能不需要的项目中。

但是Mossila的示例代码是完全独立的。 它可以直接剪切并粘贴到您的项目中。 它只是工作! 那么你只需要调整它到你的需求。 看到这里




 LayoutInflater factory = LayoutInflater.from(this);
final View textEntryView = factory.inflate(R.layout.text_entry, null);
//text_entry is an Layout XML file containing two text field to display in alert dialog
final EditText input1 = (EditText) textEntryView.findViewById(R.id.EditText1);
final EditText input2 = (EditText) textEntryView.findViewById(R.id.EditText2);             
input1.setText("DefaultValue", TextView.BufferType.EDITABLE);
input2.setText("DefaultValue", TextView.BufferType.EDITABLE);
final AlertDialog.Builder alert = new AlertDialog.Builder(this);

alert.setIcon(R.drawable.icon)
     .setTitle("Enter the Text:")
     .setView(textEntryView)
     .setPositiveButton("Save", 
         new DialogInterface.OnClickListener() {
             public void onClick(DialogInterface dialog, int whichButton) {
                    Log.i("AlertDialog","TextEntry 1 Entered "+input1.getText().toString());
                    Log.i("AlertDialog","TextEntry 2 Entered "+input2.getText().toString());
                    /* User clicked OK so do some stuff */
             }
         })
     .setNegativeButton("Cancel",
         new DialogInterface.OnClickListener() {
             public void onClick(DialogInterface dialog,
                    int whichButton) {
             }
         });
alert.show();



检查下面的代码。 它以编程方式显示2个编辑文本字段,没有任何布局xml。 如果在片段中使用“this”,则将其更改为“getActivity()”。

棘手的是,我们必须在创建警报对话框之后设置第二个文本字段的输入类型,否则第二个文本字段将显示文本而不是点。

    public void showInput() {
        OnFocusChangeListener onFocusChangeListener = new OnFocusChangeListener() {
            @Override
            public void onFocusChange(final View v, boolean hasFocus) {
                if (hasFocus) {
                    // Must use message queue to show keyboard
                    v.post(new Runnable() {
                        @Override
                        public void run() {
                            InputMethodManager inputMethodManager= (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
                            inputMethodManager.showSoftInput(v, 0);
                        }
                    });
                }
            }
        };

        final EditText editTextName = new EditText(this);
        editTextName.setHint("Name");
        editTextName.setFocusable(true);
        editTextName.setClickable(true);
        editTextName.setFocusableInTouchMode(true);
        editTextName.setSelectAllOnFocus(true);
        editTextName.setSingleLine(true);
        editTextName.setImeOptions(EditorInfo.IME_ACTION_NEXT);
        editTextName.setOnFocusChangeListener(onFocusChangeListener);

        final EditText editTextPassword = new EditText(this);
        editTextPassword.setHint("Password");
        editTextPassword.setFocusable(true);
        editTextPassword.setClickable(true);
        editTextPassword.setFocusableInTouchMode(true);
        editTextPassword.setSelectAllOnFocus(true);
        editTextPassword.setSingleLine(true);
        editTextPassword.setImeOptions(EditorInfo.IME_ACTION_DONE);
        editTextPassword.setOnFocusChangeListener(onFocusChangeListener);

        LinearLayout linearLayout = new LinearLayout(this);
        linearLayout.setOrientation(LinearLayout.VERTICAL);
        linearLayout.addView(editTextName);
        linearLayout.addView(editTextPassword);

        DialogInterface.OnClickListener alertDialogClickListener = new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                switch (which){
                case DialogInterface.BUTTON_POSITIVE:
                    // Done button clicked
                    break;
                case DialogInterface.BUTTON_NEGATIVE:
                    // Cancel button clicked
                    break;
                }
            }
        };
        final AlertDialog alertDialog = (new AlertDialog.Builder(this)).setMessage("Please enter name and password")
                .setView(linearLayout)
                .setPositiveButton("Done", alertDialogClickListener)
                .setNegativeButton("Cancel", alertDialogClickListener)
                .create();

        editTextName.setOnEditorActionListener(new OnEditorActionListener() {
            @Override
            public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
                editTextPassword.requestFocus(); // Press Return to focus next one
                return false;
            }
        });
        editTextPassword.setOnEditorActionListener(new OnEditorActionListener() {
            @Override
            public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
                // Press Return to invoke positive button on alertDialog.
                alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).performClick();
                return false;
            }
        });

        // Must set password mode after creating alert dialog.
        editTextPassword.setInputType(InputType.TYPE_TEXT_VARIATION_PASSWORD);
        editTextPassword.setTransformationMethod(PasswordTransformationMethod.getInstance());
        alertDialog.show();
    }