设置属性值，点击事件ListPreference

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需求如下：

echo‘0’> bd_uart_sw //BD uart <-->LC1860

echo‘1’> bd_uart_sw //BD uart <-->TYPEC

echo‘2’> bd_uart_sw //BD uart <-->BM

echo‘3’> bd_uart_sw //BD uart <-->RS232

代码如下：

if (objValue.equals("1")){         setFile("/sys/misc-config/bd_uart_sw","0");             } else if (objValue.equals("2")){setFile("/sys/misc-config/bd_uart_sw","1");             } else if (objValue.equals("3")){setFile("/sys/misc-config/bd_uart_sw","2");             }else if (objValue.equals("4")){setFile("/sys/misc-config/bd_uart_sw","3");             }

另外一种方式：

if(objValue.equals("005")){SystemProperties.set("debug.mgrt.set","0");dialogExit(Amt3MainActivity.this,getString(R.string.CommonlyPattern));}else if(objValue.equals("006")){SystemProperties.set("debug.mgrt.set","1");dialogExit(Amt3MainActivity.this,getString(R.string.RootPattern));}

两个常用方法：

void setFile(String path, String val) {        FileOutputStream out = null;        try {            out = new FileOutputStream(path);            byte[] buf = val.getBytes();            out.write(buf, 0, buf.length);        } catch (FileNotFoundException e) {            Log.e(TAG, "FileNotFoundException: setFile " + e);        } catch (IOException e) {            Log.e(TAG, "IOException: setFile " + e);        } finally {            try {                if (out != null)                    out.close();            } catch (IOException e) {            }        }    }        String getFile(String path) {        FileInputStream is = null;        String val = null;        try {            is = new FileInputStream(path);            byte[] buffer = new byte[64];            int count = is.read(buffer);            if (count > 0) {                val = new String(buffer, 0, count);            }        } catch (IOException e) {            Log.d(TAG, "IOException: getFile " + e);        } finally {            if (is != null) {                try {                    is.close();                } catch (IOException e) {                }            }        }        if (val != null) {            val = val.trim();        }        return val;    }

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