<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">转自:</span><a target=_blank target="_blank" href="http://blog.csdn.net/way_ping_li/article/details/8487866" style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">http://blog.csdn.net/way_ping_li/article/details/8487866</a>
废话不多说,直接分享封装好的log信息类:LogcatHelper
</pre><p><pre name="code" class="java">import java.io.BufferedReader; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStreamReader; import java.text.SimpleDateFormat; import java.util.Date; import android.content.Context; import android.os.Environment; public class LogcatHelper { private static LogcatHelper INSTANCE = null; private static String PATH_LOGCAT; private LogDumper mLogDumper = null; private int mPId; public void init(Context context) { if (Environment.getExternalStorageState().equals( Environment.MEDIA_MOUNTED)) {// 优先保存到SD卡中 PATH_LOGCAT = Environment.getExternalStorageDirectory() .getAbsolutePath() + File.separator + "HuangYn1"; } else {// 如果SD卡不存在,就保存到本应用的目录下 PATH_LOGCAT = context.getFilesDir().getAbsolutePath() + File.separator + "HuangYn1"; } File file = new File(PATH_LOGCAT); if (!file.exists()) { file.mkdirs(); } } public static LogcatHelper getInstance(Context context) { if (INSTANCE == null) { INSTANCE = new LogcatHelper(context); } return INSTANCE; } private LogcatHelper(Context context) { init(context); mPId = android.os.Process.myPid(); } public void start() { if (mLogDumper == null) mLogDumper = new LogDumper(String.valueOf(mPId), PATH_LOGCAT); mLogDumper.start(); } public void stop() { if (mLogDumper != null) { mLogDumper.stopLogs(); mLogDumper = null; } } private class LogDumper extends Thread { private Process logcatProc; private BufferedReader mReader = null; private boolean mRunning = true; String cmds = null; private String mPID; private FileOutputStream out = null; public LogDumper(String pid, String dir) { mPID = pid; try { out = new FileOutputStream(new File(dir, "Log-" + System.currentTimeMillis() + ".log")); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } /** * * 日志等级:*:v , *:d , *:w , *:e , *:f , *:s * * 显示当前mPID程序的 E和W等级的日志. * * */ // cmds = "logcat *:e *:w | grep \"(" + mPID + ")\""; // cmds = "logcat | grep \"(" + mPID + ")\"";//打印所有日志信息 // cmds = "logcat -s way";//打印标签过滤信息 cmds = "logcat *:e *:i -s 'huangyn1' | grep \"(" + mPId + ")\""; } public void stopLogs() { mRunning = false; } @Override public void run() { try { logcatProc = Runtime.getRuntime().exec(cmds); mReader = new BufferedReader(new InputStreamReader( logcatProc.getInputStream()), 1024); String line = null; while (mRunning && (line = mReader.readLine()) != null) { if (!mRunning) { break; } if (line.length() == 0) { continue; } if (out != null && line.contains(mPID)) { out.write((line + "\n").getBytes()); } } } catch (IOException e) { e.printStackTrace(); } finally { if (logcatProc != null) { logcatProc.destroy(); logcatProc = null; } if (mReader != null) { try { mReader.close(); mReader = null; } catch (IOException e) { e.printStackTrace(); } } if (out != null) { try { out.close(); } catch (IOException e) { e.printStackTrace(); } out = null; } } } } }