AlertDialog with EditText, open soft keyboard automatically with focus on EditText doesn't work

问题

I'm trying to get a piece of code work which should focus an EditText in an AlertDialog as soon as it shows and then automatically open the soft keyboard. Instead, it just makes the screen go darker.

Builder builder = new Builder(this);
final EditText input = new EditText(this);
AlertDialog dialog = builder.create();
builder
    .setTitle(R.string.dialog_title_addsubject)
    .setMessage(R.string.dialog_addsubject)
    .setView(input)
    .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            String value = input.getText().toString();
            if (input.getText().toString().trim().length() == 0) {
                Toast.makeText(Main.this, R.string.input_empty, Toast.LENGTH_SHORT).show();
            } else {
                db.insertSubject(value);
                getData();
            }
         }
    })
    .setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
        }
    });
    input.requestFocus();
    dialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
    dialog.show();

I tried many ways of doing this but none worked. I hope you guys can help me here. Thanks in advance!

回答1:

Ok I managed to get it working:

Builder builder = new Builder(this);
            final EditText input = new EditText(this);
            builder
                .setTitle(R.string.dialog_title_addsubject)
                .setMessage(R.string.dialog_addsubject)
                .setView(input)
                .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {

                    public void onClick(DialogInterface dialog, int which) {
                        String value = input.getText().toString();
                        if (input.getText().toString().trim().length() == 0) {
                            Toast.makeText(Main.this, R.string.input_empty, Toast.LENGTH_SHORT).show();
                        } else {
                            db.insertSubject(value);
                            getData();
                        }
                        InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                        imm.hideSoftInputFromWindow(input.getWindowToken(), 0);
                    }
                })
                .setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {

                    public void onClick(DialogInterface dialog, int which) {
                        InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                        imm.hideSoftInputFromWindow(input.getWindowToken(), 0);
                    }

                });

                builder.show();
                input.requestFocus();
                InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);

This method doesn't need a dialog so I can use builder.show() to show the dialog and the code provided by Sabre opens the soft keyboard. Another code snippet in each of the buttons closes the soft keyboard automatically.

回答2:

You can use this instead of dialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);:

InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);

Call this after dialog.show();

回答3:

   public void selectContact(Context context) {
        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        builder.setIcon(R.mipmap.icon);
        builder.setTitle(R.string.title);
        builder.setPositiveButton(android.R.string.ok, context);
        builder.setNegativeButton(android.R.string.cancel,context);
        builder.setView(View.inflate(context,
                R.layout.dialog, null));
        AlertDialog alertDialog = builder.create();

        alertDialog.setOnShowListener(this); //Add listener
        alertDialog.show();
    }

open keyborad in onShow :-

    @Override
    public void onShow(DialogInterface dialog) {
        EditText editText = (EditText) ((AlertDialog) dialog).findViewById(R.id.number);
        InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.showSoftInput(editText, InputMethodManager.SHOW_IMPLICIT);
    }

回答4:

Try showing it after a second -

new Handler(Looper.getMainLooper()).postDelayed(new Runnable() {
    input.requestFocus();

    dialog.getWindow().
  setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE); 

    dialog.show();  
}, 1000)

来源：https://stackoverflow.com/questions/12997273/alertdialog-with-edittext-open-soft-keyboard-automatically-with-focus-on-editte