java保存log到文件中

public class LogUtil {

public static boolean isDebug = true;

public static void log(Object paramObject) {

try{

LogUtil.log(Utils.TAG, paramObject.toString());

}catch (Exception e){

}

}

public static void log(String paramString, Object paramObject) {

if (isDebug) {

Log.d(paramString, paramObject.toString());

saveToSDCard(paramString +" :" + getDate()+" :" + paramObject.toString());

}

}

public static void logErr(Throwable paramObject) {

if (isDebug) {

final Writer result = new StringWriter();

final PrintWriter printWriter = new PrintWriter(result);

paramObject.printStackTrace(printWriter);

LogUtil.log("Exception:" + result.toString());

printWriter.close();

}

}

private static String getDate() {

SimpleDateFormat format=new SimpleDateFormat("MM-dd HH:mm:ss.SSS");

String time=format.format(new Date());

return time;

}

/**

* 追加文件：使用FileWriter

*

* @param content

*/

private static void saveToSDCard(String content) {

try {

// 打开一个写文件器，构造函数中的第二个参数true表示以追加形式写文件

if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {

return;

}

String path = Environment.getExternalStorageDirectory() + "/baby/baby.log";

File file = new File(path);

if (!file.exists() || file.isDirectory()) {

file.getParentFile().mkdirs();

file.createNewFile();

}

FileWriter writer = new FileWriter(path, true);

writer.write(content + "\n");

writer.close();

} catch (IOException e) {

e.printStackTrace();

}

}

public static void clearLog(){

if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {

return;

}

String path = Environment.getExternalStorageDirectory() + "/ihome/ihome.log";

File file = new File(path);

if (file.exists()) {

file.delete();

}

}

}