使用EditText的AlertDialog,自动打开软键盘并专注于EditText不起作用

Question

我正在尝试获得一段代码工作,它应该在显示时立即将EditText集中在AlertDialog中,然后自动打开软键盘.相反,它只会使屏幕变暗.

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();

我尝试过很多方法,但没有办法.我希望你们能在这里帮助我.提前致谢!

Answer 1

好的,我设法让它工作:

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);

此方法不需要对话框,因此我可以使用builder.show()来显示对话框,Saber提供的代码打开软键盘.每个按钮中的另一个代码片段会自动关闭软键盘.

Answer 2

您可以使用此代替 dialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);:

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

之后再打电话 dialog.show();