CrashHandler.java
UncaughtException处理类,当程序发生Uncaught异常的时候,有该类来接管程序,并记录发送错误报告
package com.amanda;
import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.os.Environment;
import android.os.Looper;
import android.util.Log;
import android.widget.Toast;
/**
* UncaughtException处理类,当程序发生Uncaught异常的时候,有该类来接管程序,并记录发送错误报告.
*
* @author user
*
*/
public class CrashHandler implements UncaughtExceptionHandler {
private static final String TAG = "CrashHandler" ;
private static final String CRASH_FLOD_NAME = "crash" ;
//系统默认的UncaughtException处理类
private Thread.UncaughtExceptionHandler mDefaultHandler ;
//CrashHandler实例
private static CrashHandler INSTANCE = new CrashHandler ();
//程序的Context对象
private Context mContext ;
//用来存储设备信息和异常信息
private Map<String, String> infos = new HashMap<String, String>();
//用于格式化日期,作为日志文件名的一部分
private DateFormat formatter = new SimpleDateFormat( "yyyyMMdd_kkmmss" );
/** 保证只有一个CrashHandler实例 */
private CrashHandler() {
}
/** 获取CrashHandler实例 ,单例模式 */
public static CrashHandler getInstance() {
return INSTANCE ;
}
/**
* 初始化
*
* @param context
*/
public void init(Context context) {
mContext = context;
//获取系统默认的UncaughtException处理器
mDefaultHandler = Thread. getDefaultUncaughtExceptionHandler ();
//设置该CrashHandler为程序的默认处理器
Thread. setDefaultUncaughtExceptionHandler ( this );
}
/**
* 当UncaughtException发生时会转入该函数来处理
*/
@Override
public void uncaughtException(Thread thread, Throwable ex) {
if (!handleException(ex) && mDefaultHandler != null ) {
//如果用户没有处理则让系统默认的异常处理器来处理
mDefaultHandler .uncaughtException(thread, ex);
} else {
try {
Thread. sleep (3000);
} catch (InterruptedException e) {
Log. e ( TAG , "error : " , e);
}
//退出程序
android.os.Process. killProcess (android.os.Process. myPid ());
System. exit (1);
}
}
/**
* 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成.
*
* @param ex
* @return true:如果处理了该异常信息;否则返回false.
*/
private boolean handleException(Throwable ex) {
if (ex == null ) {
return false ;
}
//使用Toast来显示异常信息
new Thread() {
@Override
public void run() {
Looper. prepare ();
Toast. makeText ( mContext , "很抱歉,程序出现异常,即将退出." , Toast. LENGTH_LONG ).show();
Looper. loop ();
}
}.start();
//收集设备参数信息
collectDeviceInfo( mContext );
//保存日志文件
saveCrashInfo2File(ex);
return true ;
}
/**
* 收集设备参数信息
* @param ctx
*/
public void collectDeviceInfo(Context ctx) {
try {
PackageManager pm = ctx.getPackageManager();
PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager. GET_ACTIVITIES );
if (pi != null ) {
infos .put( "packageName" , pi. packageName );
String versionName = pi. versionName == null ? "null" : pi. versionName ;
String versionCode = pi. versionCode + "" ;
infos .put( "versionName" , versionName);
infos .put( "versionCode" , versionCode);
}
} catch (NameNotFoundException e) {
Log. e ( TAG , "an error occured when collect package info" , e);
}
Field[] fields = Build. class .getDeclaredFields();
for (Field field : fields) {
try {
field.setAccessible( true );
infos .put(field.getName(), field.get( null ).toString());
Log. d ( TAG , field.getName() + " : " + field.get( null ));
} catch (Exception e) {
Log. e ( TAG , "an error occured when collect crash info" , e);
}
}
}
/**
* 保存错误信息到文件中
*
* @param ex
* @return 返回文件名称,便于将文件传送到服务器
*/
private String saveCrashInfo2File(Throwable ex) {
StringBuffer sb = new StringBuffer();
for (Map.Entry<String, String> entry : infos .entrySet()) {
String key = entry.getKey();
String value = entry.getValue();
sb.append(key + "=" + value + "
" );
}
Writer writer = new StringWriter();
PrintWriter printWriter = new PrintWriter(writer);
ex.printStackTrace(printWriter);
Throwable cause = ex.getCause();
while (cause != null ) {
cause.printStackTrace(printWriter);
cause = cause.getCause();
}
printWriter.close();
String result = writer.toString();
sb.append(result);
try {
long timestamp = System. currentTimeMillis ();
String time = formatter .format( new Date());
String fileName = "crash_" + time + "_" + timestamp + ".log" ;
String fileAbsPath = "" ;
if (Environment. getExternalStorageState ().equals(Environment. MEDIA_MOUNTED ) &&
!Environment. getExternalStorageState ().equals(Environment. MEDIA_MOUNTED_READ_ONLY )) {
fileAbsPath = Environment. getExternalStorageDirectory ().getPath()+File. separator + CRASH_FLOD_NAME +File. separator ;
}
else {
fileAbsPath = mContext .getFilesDir().getPath()+File. separator + CRASH_FLOD_NAME +File. separator ;
}
File dir = new File(fileAbsPath);
if (!dir.exists()) {
dir.mkdirs();
}
FileOutputStream fos = new FileOutputStream(fileAbsPath + fileName);
fos.write(sb.toString().getBytes());
fos.close();
return fileName;
} catch (Exception e) {
Log. e ( TAG , "an error occured while writing file..." , e);
}
return null ;
}
}CrashApplication.java
继承Application，实现全局crash报告记录
package com.amanda;
import android.app.Application;
public class CrashApplication extends Application {
@Override
public void onCreate() {
super .onCreate();
CrashHandler crashHandler = CrashHandler. getInstance ();
crashHandler.init(getApplicationContext());
}
}AndroidManifest.xml
<? xml version = "1.0" encoding = "utf-8" ?>
< manifest xmlns:android = "http://schemas.android.com/apk/res/android"
package = "com.amanda"
android:versionCode = "1"
android:versionName = "1.0" >
< uses-sdk
android:minSdkVersion = "15"
android:targetSdkVersion = "15" />
< uses-permission android:name = "android.permission.WRITE_EXTERNAL_STORAGE" />
< application
android:name = ".CrashApplication"
android:icon = "@drawable/icon"
android:label = "@string/app_name"
android:allowBackup = "true" >
< activity android:name = ".MainActivity"
android:label = "@string/app_name"
android:theme = "@style/mytheme" >
< intent-filter >
< action android:name = "android.intent.action.MAIN" />
< category android:name = "android.intent.category.LAUNCHER" />
</ intent-filter >
</ activity >
</ application > </ manifest >这样，就可以实现当出现UncaughtException时，将其相关信息保存到文件/sdcard/crash/xx.log或者/data/data/<package name>/file/crash/xx.log