NeverCrash [@see https://github.com/android-notes/Cockroach]

CrashHandler.java

package com.cndatacom.pmg.application;

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.Locale;
import java.util.Map;

import com.cndatacom.cdcutils.method.LogMgr;
import com.cndatacom.cdcutils.method.SharedPreferencesUtil;
import com.cndatacom.pmg.util.DirMgr;
import com.cndatacom.pmg.util.MethodUtil;

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;

/**
 * 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 {

    public static final String TAG = "CrashHandler";

    // 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("yyyy-MM-dd_HH-mm-ss", Locale.getDefault());

    /** 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();
                MethodUtil.showToast(mContext, "很抱歉，程序出现异常，即将退出。");
                Looper.loop();
            }
        }.start();
        
        // 收集设备参数信息
        collectDeviceInfo(mContext);
        
        // 保存日志文件
        String logFileName = saveCrashInfo2File(ex);
        LogMgr.showLog(mContext, "logfile --> " + logFileName);
        new SharedPreferencesUtil(mContext).saveString("logfile", logFileName);
        
        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) {
                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");
        }

        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";
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                String path = DirMgr.PATH_LOG;
                File dir = new File(path);
                if (!dir.exists()) {
                    dir.mkdirs();
                }
                FileOutputStream fos = new FileOutputStream(path + File.separator +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;
    }
}

UIApplication.java

package com.cndatacom.pmg.application;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import android.app.Application;
import android.util.DisplayMetrics;

import com.baidu.mapapi.SDKInitializer;
import com.cndatacom.pmg.album.ImageUtil;
import com.cndatacom.pmg.db.DataBase;
import com.cndatacom.pmg.file.DownloadTask;
import com.cndatacom.pmg.file.DownloadTaskHelper;
import com.cndatacom.pmg.model.OperatorTypeForm;
import com.cndatacom.pmg.util.Constants;
import com.cndatacom.pmg.util.UrlConstants;

public class UIApplication extends Application implements DownloadTaskHelper {
	public static int currentNetwork = Constants.NETWORK_TYPE_MOBILE;
	private Map<String, Integer> notificationIds = new HashMap<String, Integer>(); // 用于通知栏显示新消息推送

	/** 屏幕宽高，标题栏高度 */
	private int displayWidth;
	private int displayHeight;
	private int statusBarHeight;
	/** 登陆获取定位信息 */
	private String currProvince;
	private String currCity;
	public static boolean isLogin;

	/** 运营商列表 */
	private List<OperatorTypeForm> mOperatorList = new ArrayList<OperatorTypeForm> ();
	/** 当前选择的运营商 */
	private OperatorTypeForm mCurrentOperator = new OperatorTypeForm(
			Constants.OPERATOR_ALL_ID, Constants.OPERATOR_ALL_NAME);
	/** 上次选择的运营商 */
	private OperatorTypeForm mPreviousOperator = new OperatorTypeForm(
			Constants.OPERATOR_ALL_ID, Constants.OPERATOR_ALL_NAME);

	/** 微聊下载语音|图片任务集合 */
	private Set<String> chatFileList = new HashSet<String>(); // 微聊中，正在下载的语音|图片的路径集合

	public Set<String> getChatFileList() {
		return chatFileList;
	}

	public void setChatFileList(Set<String> chatFileList) {
		this.chatFileList = chatFileList;
	}

	@Override
	public void onCreate() {
		getParameters();
		super.onCreate();
		ImageUtil.initImageLoader(this, UrlConstants.SERVERURL);
		SDKInitializer.initialize(getApplicationContext());
		DataBase dBase = new DataBase(getApplicationContext());
		dBase.close();

		// startService(new Intent(this, NetworkStateMonitorService.class)); // 暂时先不使用

		CrashHandler crashHandler = CrashHandler.getInstance();
		crashHandler.init(getApplicationContext());
		
		mOperatorList.add(new OperatorTypeForm(
				Constants.OPERATOR_ALL_ID, Constants.OPERATOR_ALL_NAME));
	}

	/**
	 * 获取屏幕宽高等参数
	 */
	private void getParameters() {
		// DisplayMetrics displayMetrics = new DisplayMetrics();
		// getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);

		DisplayMetrics displayMetrics = getApplicationContext().getResources()
				.getDisplayMetrics();
		displayWidth = displayMetrics.widthPixels;
		displayHeight = displayMetrics.heightPixels;
		//
		Class<?> c = null;
		Object obj = null;
		Field field = null;
		int x = 0, sbar = 0;
		try {
			c = Class.forName("com.android.internal.R$dimen");
			obj = c.newInstance();
			field = c.getField("status_bar_height");
			x = Integer.parseInt(field.get(obj).toString());
			sbar = getResources().getDimensionPixelSize(x);
		} catch (Exception e) {
			e.printStackTrace();
		}
		statusBarHeight = sbar;
	}

	public Map<String, Integer> getNotificationIds() {
		return notificationIds;
	}

	public void setNotificationIds(Map<String, Integer> notificationIds) {
		this.notificationIds = notificationIds;
	}

	public int getDisplayWidth() {
		return displayWidth;
	}

	public int getDisplayHeight() {
		return displayHeight;
	}

	public int getStatusBarHeight() {
		return statusBarHeight;
	}

	public String getCurrProvince() {
		return currProvince;
	}

	public void setCurrProvince(String currProvince) {
		this.currProvince = currProvince;
	}

	public String getCurrCity() {
		return currCity;
	}

	public void setCurrCity(String currCity) {
		this.currCity = currCity;
	}

	private Map<String, DownloadTask> mDownloadMap = new HashMap<String, DownloadTask>();

	@Override
	public Map<String, DownloadTask> getDownloadMap() {
		return this.mDownloadMap;
	}

	@Override
	public void setDownloadMap(Map<String, DownloadTask> downloadMap) {
		this.mDownloadMap = downloadMap;
	}

	public List<OperatorTypeForm> getmOperatorList() {
		return mOperatorList;
	}

	public void addmOperatorList(List<OperatorTypeForm> mOperatorList) {
		this.mOperatorList.addAll(mOperatorList);
	}

	public OperatorTypeForm getmCurrentOperator() {
		return mCurrentOperator;
	}

	public void setmCurrentOperator(OperatorTypeForm mCurrentOperator) {
		this.mCurrentOperator = mCurrentOperator;
	}

	public OperatorTypeForm getmPreviousOperator() {
		return mPreviousOperator;
	}

	public void setmPreviousOperator(OperatorTypeForm mPreviousOperator) {
		this.mPreviousOperator = mPreviousOperator;
	}

}