捕获android程序崩溃日志

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" />