LogcatHelperDemo【应用log信息保存成本地文件】
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前言
简单记录下LogcatHelper的使用，并对原有代码进行了修改【因为保存到应用内的目录中不需要申请权限，所以去掉保存到SD的功能--个人觉得这个类主要用于开发者自己调试用】：
/**初始化目录 "包名+logcat" * */ 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 + context.getPackageName() + File.separator + "logcat"; // } else { //如果SD卡不存在，就保存到本应用的目录下【why 直接保存到本应用的目录下】 PATH_LOGCAT = context.getFilesDir().getAbsolutePath() + File.separator + "logcat"; // } File file = new File(PATH_LOGCAT); if (!file.exists()) { file.mkdirs(); } }
效果图
存储在应用内的目录：
logcat-2018-08-14.log
2018-08-14 10:18:06 I/art (24242): Late-enabling -Xcheck:jni 2018-08-14 10:18:06 W/art (24242): Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable 2018-08-14 10:18:06 E/Process (24242): android_os_Process_getProcessNameByPid pid is 24242 2018-08-14 10:18:06 E/Process (24242): android_os_Process_getProcessNameByPid value is ogcathelperdemo 2018-08-14 10:18:06 V/MainActivity(24242): 这是V日志 2018-08-14 10:18:06 D/MainActivity(24242): 这是D日志 2018-08-14 10:18:06 I/MainActivity(24242): 这是I日志 2018-08-14 10:18:06 W/MainActivity(24242): 这是W日志 2018-08-14 10:18:06 E/MainActivity(24242): 这是E日志 2018-08-14 10:18:06 V/PhoneWindow(24242): DecorView setVisiblity: visibility = 4 ,Parent =null, this =com.android.internal.policy.impl.PhoneWindow$DecorView{34498aa9 I.E..... R.....ID 0,0-0,0} 2018-08-14 10:18:06 D/OpenGLRenderer(24242): Dumper init 4 threads <0x7f84d321c0> 2018-08-14 10:18:06 D/OpenGLRenderer(24242): <com.why.project.logcathelperdemo> is running. 2018-08-14 10:18:06 D/OpenGLRenderer(24242): <com.why.project.logcathelperdemo> setHwuiLog: debug.egl.trace=false 2018-08-14 10:18:06 D/OpenGLRenderer(24242): initialize DisplayEventReceiver 0x7f8ac1a400 2018-08-14 10:18:06 D/OpenGLRenderer(24242): Use EGL_SWAP_BEHAVIOR_PRESERVED: true 2018-08-14 10:18:06 D/Atlas (24242): Validating map... 2018-08-14 10:18:06 D/ViewRootImpl(24242): hardware acceleration is enabled, this = ViewRoot{296d9189 com.why.project.logcathelperdemo/com.why.project.logcathelperdemo.MainActivity,ident = 0} 2018-08-14 10:18:06 V/PhoneWindow(24242): DecorView setVisiblity: visibility = 0 ,Parent =ViewRoot{296d9189 com.why.project.logcathelperdemo/com.why.project.logcathelperdemo.MainActivity,ident = 0}, this =com.android.internal.policy.impl.PhoneWindow$DecorView{34498aa9 V.E..... R.....ID 0,0-0,0} 2018-08-14 10:18:06 D/OpenGLRenderer(24242): CanvasContext() 0x7f8ac1db40 initialize 0x7f91e3c610 2018-08-14 10:18:06 D/MALI (24242): eglInitialize:1479: [+] 2018-08-14 10:18:06 E/GED (24242): Failed to get GED Log Buf, err(0) 2018-08-14 10:18:06 D/MALI (24242): eglInitialize:1850: [-] 2018-08-14 10:18:06 I/ (24242): elapse(include ctx switch):3533 (ms), eglInitialize 2018-08-14 10:18:06 I/OpenGLRenderer(24242): Initialized EGL, version 1.4 2018-08-14 10:18:06 D/MALI (24242): eglCreateContext:206: [MALI] eglCreateContext display 0x7f91c5fd00, share context 0x0 here. 2018-08-14 10:18:06 D/MALI (24242): gles_context_new:248: Create GLES ctx 0x7f8ae8a008 successfully 2018-08-14 10:18:06 D/MALI (24242): eglCreateContext:543: [MALI] eglCreateContext end. Created context 0x7f8ae7ad80 here. 2018-08-14 10:18:06 D/OpenGLRenderer(24242): Created EGL context (0x7f8ae37040) 2018-08-14 10:18:06 I/OpenGLRenderer(24242): Get enable program binary service property (1) 2018-08-14 10:18:06 I/OpenGLRenderer(24242): Initializing program atlas... 2018-08-14 10:18:06 D/ProgramBinary/Service(24242): BpProgramBinaryService.getFileDescriptor 2018-08-14 10:18:06 D/ProgramBinary/Service(24242): BpProgramBinaryService.getProgramMapLen 2018-08-14 10:18:06 D/ProgramBinary/Service(24242): BpProgramBinaryService.getProgramMapArray 2018-08-14 10:18:06 D/ProgramBinary/Service(24242): BpProgramBinaryService.getProgramBinaryLen 2018-08-14 10:18:06 I/OpenGLRenderer(24242): Program binary detail: Binary length is 169984, program map length is 152. 2018-08-14 10:18:06 I/OpenGLRenderer(24242): Succeeded to mmap program binaries. File descriptor is 46, and path is /dev/ashmem{. 2018-08-14 10:18:06 I/OpenGLRenderer(24242): No need to use file discriptor anymore, close fd(46). 2018-08-14 10:18:06 D/OpenGLRenderer(24242): TaskManager() 0x7f8acff1f0, cpu = 8, thread = 4 2018-08-14 10:18:06 D/OpenGLRenderer(24242): Initializing program cache from 0x0, size = -1 2018-08-14 10:18:06 D/OpenGLRenderer(24242): Enabling debug mode 0 2018-08-14 10:18:06 D/Surface (24242): Surface::connect(this=0x7f91e3c600,api=1) 2018-08-14 10:18:06 D/mali_winsys(24242): new_window_surface returns 0x3000 2018-08-14 10:18:06 D/Surface (24242): Surface::allocateBuffers(this=0x7f91e3c600) 2018-08-14 10:18:06 D/OpenGLRenderer(24242): [TaskMgr] Running thread hwuiTask1 (24290) 2018-08-14 10:18:06 W/MALI (24242): glDrawArrays:714: [MALI] glDrawArrays takes more than 5ms here. Total elapse time(us): 6667 2018-08-14 10:18:06 D/OpenGLRenderer(24242): ProgramCache save to disk, size = 3 2018-08-14 10:18:06 V/InputMethodManager(24242): onWindowFocus: null softInputMode=288 first=true flags=#81810100 2018-08-14 10:18:06 V/InputMethodManager(24242): START INPUT: com.android.internal.policy.impl.PhoneWindow$DecorView{34498aa9 V.E..... R....... 0,0-1080,1920} ic=null tba=android.view.inputmethod.EditorInfo@2ce154f2 controlFlags=#104 2018-08-14 10:18:06 D/InputMethodManager(24242): receive service's setActive call, active:true 2018-08-14 10:18:06 I/InputMethodManager(24242): handleMessage: MSG_SET_ACTIVE true, was false
使用步骤
一、项目组织结构图
注意事项：
1、 导入类文件后需要change包名以及重新import R文件路径
2、 Values目录下的文件（strings.xml、dimens.xml、colors.xml等），如果项目中存在，则复制里面的内容，不要整个覆盖
二、导入步骤
（1）将logcathelper包复制到项目中
package com.why.project.logcathelperdemo.logcathelper; import android.content.Context; import java.io.BufferedReader; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStreamReader; /** * Created by HaiyuKing * Used log日志统计保存到本地文件 * 参考资料 Android将应用log信息保存文件：http://www.cnblogs.com/weixing/p/3414164.html */ public class LogcatHelper { private static LogcatHelper INSTANCE = null; /**日志文件保存路径*/ private static String PATH_LOGCAT; private LogDumper mLogDumper = null; /**应用进程ID*/ private int mPId; /**初始化目录 "包名+logcat" * */ 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 + context.getPackageName() + File.separator + "logcat"; // } else { //如果SD卡不存在，就保存到本应用的目录下【why 直接保存到本应用的目录下】 PATH_LOGCAT = context.getFilesDir().getAbsolutePath() + File.separator + "logcat"; // } File file = new File(PATH_LOGCAT); if (!file.exists()) { file.mkdirs(); } } /**单例模式 * */ 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, "logcat-" + MyDate.getFileName() + ".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 | 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((MyDate.getDateEN() + " " + 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; } } } } }
package com.why.project.logcathelperdemo.logcathelper; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Locale; /** * Created by HaiyuKing * Used */ public class MyDate { public static String getFileName() { SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd",Locale.CHINA); String date = format.format(new Date(System.currentTimeMillis())); return date;// 2012-10-03 } public static String getDateEN() { SimpleDateFormat format1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss",Locale.CHINA); String date1 = format1.format(new Date(System.currentTimeMillis())); return date1;// 2012-10-03 23:41:31 } }
（2）新建MyApplication.java并添加以下代码
package com.why.project.logcathelperdemo; import android.app.Application; import com.why.project.logcathelperdemo.logcathelper.LogcatHelper; /** * Created by HaiyuKing * Used 自定义application */ public class MyApplication extends Application{ @Override public void onCreate() { super.onCreate(); //在应用中start LogcatHelper LogcatHelper.getInstance(this).start(); } @Override public void onTerminate() { super.onTerminate(); //在应用中stop LogcatHelper LogcatHelper.getInstance(this).stop(); } @Override public void onTrimMemory(int level) { super.onTrimMemory(level); } }
（3）在AndroidManifest.xml中申请MyApplication
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.why.project.logcathelperdemo"> <application android:name=".MyApplication" android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN"/> <category android:name="android.intent.category.LAUNCHER"/> </intent-filter> </activity> </application> </manifest>
（4）使用完之后，记得调用一下LogcatHelper.getInstance(this).stop();，MyApplication中执行的LogcatHelper.getInstance(this).stop();，可能有时候执行不到，保险起见，可以在第一个activity的onDestroy中执行LogcatHelper.getInstance(this).stop();
三、使用方法
正常执行Log方法即可。
package com.why.project.logcathelperdemo; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.util.Log; import com.why.project.logcathelperdemo.logcathelper.LogcatHelper; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Log.v("MainActivity", "这是V日志"); Log.d("MainActivity", "这是D日志"); Log.i("MainActivity", "这是I日志"); Log.w("MainActivity", "这是W日志"); Log.e("MainActivity", "这是E日志"); } @Override protected void onDestroy() { // TODO Auto-generated method stub super.onDestroy(); //使用完后，调用stop LogcatHelper.getInstance(getApplicationContext()).stop(); } }
混淆配置
无
