主要类:

package com.example.callstatus;

import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.net.UnknownHostException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import android.annotation.SuppressLint;
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.telephony.TelephonyManager;
import android.text.TextUtils;
import android.util.Log;
import android.widget.Toast;

/**
* 捕获android程序崩溃日志<br>
* UncaughtException处理类,当程序发生Uncaught异常的时候,有该类来接管程序.
*
* @author PMTOAM
*
*/
@SuppressLint("SimpleDateFormat")
public class CrashHandler implements UncaughtExceptionHandler
{

public static final String TAG = CrashHandler.class.getCanonicalName();

// 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_HHmmss");

/**
* 保证只有一个实例
*/
private CrashHandler()
{
}

/**
* 获取实例 ,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。", Toast.LENGTH_LONG)
.show();
Looper.loop();
}
}.start();

// 收集设备参数信息
collectDeviceInfo(mContext);

// 保存日志文件
String str = saveCrashInfo2File(ex);
Log.e(TAG, str);

return false;
}

/**
* 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)
{
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 + "]\n");
}

sb.append("\n" + getStackTraceString(ex));

try
{
String time = formatter.format(new Date());

TelephonyManager mTelephonyMgr = (TelephonyManager) mContext
.getSystemService(Context.TELEPHONY_SERVICE);
String imei = mTelephonyMgr.getDeviceId();
if (TextUtils.isEmpty(imei))
{
imei = "unknownimei";
}

String fileName = "CRS_" + time + "_" + imei + ".txt";

File sdDir = null;

if (Environment.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED))
sdDir = Environment.getExternalStorageDirectory();

File cacheDir = new File(sdDir + File.separator + "dPhoneLog");
if (!cacheDir.exists())
cacheDir.mkdir();

File filePath = new File(cacheDir + File.separator + fileName);

FileOutputStream fos = new FileOutputStream(filePath);
fos.write(sb.toString().getBytes());
fos.close();

return fileName;
}
catch (Exception e)
{
Log.e(TAG, "an error occured while writing file...", e);
}
return null;
}

/**
* 获取捕捉到的异常的字符串
*/
public static String getStackTraceString(Throwable tr)
{
if (tr == null)
{
return "";
}

Throwable t = tr;
while (t != null)
{
if (t instanceof UnknownHostException)
{
return "";
}
t = t.getCause();
}

StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
tr.printStackTrace(pw);
return sw.toString();
}
}


使用方法: 

package com.example.callstatus;

import android.app.Application;

public class MyApplication extends Application
{
@Override
public void onCreate()
{
super.onCreate();

CrashHandler crashHandler = CrashHandler.getInstance();
crashHandler.init(getApplicationContext());
}
}

所需权限:  

<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
来自:http://blog.csdn.net/wangyuexing_blog/article/details/39009069

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