android EditText 获取焦点弹出软键盘并设置光标位

        noteContentTv.setFocusable(true);
        noteContentTv.requestFocus();
        InputMethodManager imm = (InputMethodManager)   getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
        /*设置光标位置*/
        noteContentTv.setSelection(noteContentTv.getText().length());