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本文将带你了解Android应用开发Android logcat信息记录到手机文件的方法,希望本文对大家学Android有所帮助。
这里介绍两种方法:目前使用 方法一
方法一:
添加权限:
示例代码:
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public class MyApp extends Application {
private Process mLogProcess;
@Override
public void onCreate() {
super.onCreate();
try {
int pid = android.os.Process.myPid();
Log.d("MyApp", "PID is " + pid);
Calendar calendar = Calendar.getInstance();
String filename = String.format("/sdcard/MyApp_Log_%04d%02d%02d_%02d%02d%02d.txt",
calendar.get(Calendar.YEAR),
calendar.get(Calendar.MONTH),
calendar.get(Calendar.DAY_OF_MONTH),
calendar.get(Calendar.HOUR_OF_DAY),
calendar.get(Calendar.MINUTE),
calendar.get(Calendar.SECOND));
mLogProcess = Runtime.getRuntime().exec(String.format("logcat -v time -f %s", filename));
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void onTerminate() {
super.onTerminate();
if(mLogProcess != null ){
mLogProcess.destroy();
}
}
}
方法二:
添加权限 同上;
示例代码:
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package com.way.util;
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 android.content.Context;
import android.os.Environment;
/**
* log日志统计保存
*
* @author way
*
*/
public class LogcatHelper {
private static LogcatHelper INSTANCE = null;
private static String PATH_LOGCAT;
private LogDumper mLogDumper = null;
private int mPId;
/**
*
* 初始化目录
*
* */
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 + "miniGPS";
} 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 + "miniGPS";
}
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;
publicbody{ }
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