android.widget.EditText#setHorizontallyScrolling ( )源码实例Demo

private void setupEditNoteDialog() {
        AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(PopupActivity.this);
        LayoutInflater inflater = PopupActivity.this.getLayoutInflater();
        final View dialogView = inflater.inflate(R.layout.dialog_edit_note, null);
        dialogBuilder.setView(dialogView);

        final EditText edt = (EditText) dialogView.findViewById(R.id.edit_note);
        edt.setHorizontallyScrolling(false);
        edt.setMaxLines(4);
        edt.setText(mNoteEditedByUser);
        edt.setSelection(mNoteEditedByUser.length());
        dialogBuilder.setTitle(R.string.dialog_note);
        //dialogBuilder.setMessage("输入笔记");
        dialogBuilder.setPositiveButton(R.string.dialog_ok, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton) {
                mNoteEditedByUser = edt.getText().toString();
            }
        });
//                        dialogBuilder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
//                            public void onClick(DialogInterface dialog, int whichButton) {
//                                //pass
//                            }
//                        });
        AlertDialog b = dialogBuilder.create();
        b.show();
    }
 

/**
 * Ask the user for a file name, create this file and choose it.
 * ({@link #onFileChosen(View)}).
 */
private void onNewFile() {
    final Context cont = this;
    // Ask user for filename.
    final EditText input = new EditText(this);
    input.setInputType(InputType.TYPE_CLASS_TEXT);
    input.setLines(1);
    input.setHorizontallyScrolling(true);
    new AlertDialog.Builder(this)
        .setTitle(R.string.dialog_new_file_title)
        .setMessage(R.string.dialog_new_file)
        .setIcon(android.R.drawable.ic_menu_add)
        .setView(input)
        .setPositiveButton(R.string.action_ok,
                (dialog, whichButton) -> {
                    if (input.getText() != null
                            && !input.getText().toString().equals("")) {
                        File file = new File(mDir.getPath(),
                                input.getText().toString());
                        if (file.exists()) {
                            Toast.makeText(cont,
                                    R.string.info_file_already_exists,
                                    Toast.LENGTH_LONG).show();
                            return;
                        }
                        Intent intent = new Intent();
                        intent.putExtra(EXTRA_CHOSEN_FILE, file.getPath());
                        setResult(Activity.RESULT_OK, intent);
                        finish();
                    } else {
                        // Empty name is not allowed.
                        Toast.makeText(cont, R.string.info_empty_file_name,
                                Toast.LENGTH_LONG).show();
                    }
                })
        .setNegativeButton(R.string.action_cancel,
                (dialog, whichButton) -> {
                    // Do nothing.
                }).show();
}
 

/**
 * Check if it is a valid key file
 * ({@link #isValidKeyFileErrorToast()}),
 * ask user for a save name and then call
 * {@link Common#checkFileExistenceAndSave(File, String[], boolean,
 * Context, IActivityThatReactsToSave)}
 * @see Common#checkFileExistenceAndSave(File, String[], boolean, Context,
 * IActivityThatReactsToSave)
 * @see #isValidKeyFileErrorToast()
 */
private void onSave() {
    if (!isValidKeyFileErrorToast()) {
        return;
    }
    final File path = Common.getFileFromStorage(Common.HOME_DIR + "/" +
            Common.KEYS_DIR);
    final Context cont = this;
    final IActivityThatReactsToSave activity =
            this;
    // Ask user for filename.
    final EditText input = new EditText(this);
    input.setInputType(InputType.TYPE_CLASS_TEXT);
    input.setLines(1);
    input.setHorizontallyScrolling(true);
    input.setText(mFileName);
    input.setSelection(input.getText().length());
    new AlertDialog.Builder(this)
        .setTitle(R.string.dialog_save_keys_title)
        .setMessage(R.string.dialog_save_keys)
        .setIcon(android.R.drawable.ic_menu_save)
        .setView(input)
        .setPositiveButton(R.string.action_ok,
                (dialog, whichButton) -> {
                    if (input.getText() != null
                            && !input.getText().toString().equals("")) {
                        File file = new File(path.getPath(),
                                input.getText().toString());
                        Common.checkFileExistenceAndSave(file, mLines,
                                false, cont, activity);
                    } else {
                        // Empty name is not allowed.
                        Toast.makeText(cont, R.string.info_empty_file_name,
                                Toast.LENGTH_LONG).show();
                    }
                })
        .setNegativeButton(R.string.action_cancel,
                (dialog, whichButton) -> mCloseAfterSuccessfulSave = false).show();
}
 

/**
 * Check if the external storage is writable
 * {@link Common#isExternalStorageWritableErrorToast(Context)},
 * ask user for a save name and then call
 * {@link Common#checkFileExistenceAndSave(File, String[], boolean,
 * Context, IActivityThatReactsToSave)}.
 * This is a helper function for {@link #saveDump()}
 * and {@link #saveKeys()}.
 * @param data Data to save.
 * @param fileName Name of the file.
 * @param isDump True if data contains a dump. False if data contains keys.
 * @param titleId Resource ID for the title of the dialog.
 * @param messageId Resource ID for the message of the dialog.
 * @see Common#isExternalStorageWritableErrorToast(Context)
 * @see Common#checkFileExistenceAndSave(File, String[], boolean,
 * Context, IActivityThatReactsToSave)
 */
private void saveFile(final String[] data, final String fileName,
        final boolean isDump, int titleId, int messageId) {
    if (!Common.getPreferences().getBoolean(UseInternalStorage.toString(),
            false) && !Common.isExternalStorageWritableErrorToast(this)) {
        return;
    }
    String targetDir = (isDump) ? Common.DUMPS_DIR : Common.KEYS_DIR;
    final File path = Common.getFileFromStorage(
            Common.HOME_DIR +  "/" + targetDir);
    final Context context = this;
    final IActivityThatReactsToSave activity = this;

    // Ask user for filename.
    final EditText input = new EditText(this);
    input.setInputType(InputType.TYPE_CLASS_TEXT);
    input.setLines(1);
    input.setHorizontallyScrolling(true);
    input.setText(fileName);
    input.setSelection(input.getText().length());
    new AlertDialog.Builder(this)
        .setTitle(titleId)
        .setMessage(messageId)
        .setIcon(android.R.drawable.ic_menu_save)
        .setView(input)
        .setPositiveButton(R.string.action_save,
                (dialog, whichButton) -> {
                    if (input.getText() != null
                            && !input.getText().toString().equals("")) {
                        File file = new File(path.getPath(),
                                input.getText().toString());
                        Common.checkFileExistenceAndSave(file, data,
                                isDump, context, activity);
                        if (isDump) {
                            mDumpName = file.getName();
                        } else {
                            mKeysName = file.getName();
                        }
                    } else {
                        // Empty name is not allowed.
                        Toast.makeText(context, R.string.info_empty_file_name,
                                Toast.LENGTH_LONG).show();
                    }
                })
        .setNegativeButton(R.string.action_cancel,
                (dialog, whichButton) -> mCloseAfterSuccessfulSave = false).show();
    onUpdateColors(null);
}