Android UncaughtExceptionHandler捕获crash的全局异常

Android App在crash的时候可以做一些操作，比方说记录异常文件并上传到服务器，或者接入类似腾讯bugly的异常分析平台，一个简单的做法就是前者，实现的代码如下：

package com.duoyin.stock.activity;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Environment;
import android.os.Process;
import android.util.Log;

import com.duoyin.stock.util.HAUtils;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * Created by yeh on 2016/7/4.
 */
public class CrashHandler implements Thread.UncaughtExceptionHandler {
    private static final String TAG = CrashHandler.class.getName();
    private static final boolean DEBUG = true;

    private static final String PATH = Environment.getExternalStorageDirectory().getPath() + "/yehTest/log/";// log path
    private static final String FILE_NAME = "crash";

    private static final String FILE_NAME_SUFFIX = ".trace";

    private static CrashHandler sInstance = new CrashHandler();
    // 系统默认的异常处理（默认情况下，系统会终止当前的异常程序）
    private Thread.UncaughtExceptionHandler mDefaultCrashHandler;

    private Context mContext;

    private CrashHandler() {
    }

    public static CrashHandler getInstance() {
        return sInstance;
    }

    public void init(Context context) {
        mDefaultCrashHandler = Thread.getDefaultUncaughtExceptionHandler();
        Thread.setDefaultUncaughtExceptionHandler(this);
        mContext = context.getApplicationContext();
    }

    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        try {
            HAUtils.showMsg(mContext, "呃呃~~程序crash了~~~");
            // 导出当前的错误信息到sdcard
            dumpExceptionToSDCard(ex);
            uploadExceptionToServer();
        } catch (Exception e) {
            e.printStackTrace();
        }

        ex.printStackTrace();

        if (mDefaultCrashHandler != null) {
            mDefaultCrashHandler.uncaughtException(thread, ex);
        } else {
            Process.killProcess(Process.myPid());
        }
    }

    /**
     * 上传异常到服务器
     */
    private void uploadExceptionToServer() {
    }

    /**
     * 导出信息到SDCard
     *
     * @param ex
     */
    private void dumpExceptionToSDCard(Throwable ex) {
        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
            if (DEBUG) {
                Log.w(TAG, "sdcard unmounted,skip dump exception");
            }
        }

        File dir = new File(PATH);
        if (!dir.exists()) {
            dir.mkdirs();
        }

        long current = System.currentTimeMillis();
        String time = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date(current));
        File file = new File(PATH + FILE_NAME + time + FILE_NAME_SUFFIX);

        if (!file.exists()) {
            file.mkdir();
        }

        try {
            PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter(file)));
            pw.println(time);
            // 导出手机信息
            dumpPhoneInfo(pw);
            pw.println();
            // 导出异常的调用栈信息
            ex.printStackTrace(pw);
        } catch (Exception e) {
            Log.e(TAG, "dump crash info failed");
        }
    }

    private void dumpPhoneInfo(PrintWriter pw) throws PackageManager.NameNotFoundException {
        //应用的版本名称和版本号
        PackageManager pm = mContext.getPackageManager();
        PackageInfo pi = pm.getPackageInfo(mContext.getPackageName(), PackageManager.GET_ACTIVITIES);
        pw.print("App Version: ");
        pw.print(pi.versionName);
        pw.print('_');
        pw.println(pi.versionCode);

        //android版本号
        pw.print("OS Version: ");
        pw.print(Build.VERSION.RELEASE);
        pw.print("_");
        pw.println(Build.VERSION.SDK_INT);

        //手机制造商
        pw.print("Vendor: ");
        pw.println(Build.MANUFACTURER);

        //手机型号
        pw.print("Model: ");
        pw.println(Build.MODEL);

        //cpu架构
        pw.print("CPU ABI: ");
        pw.println(Build.CPU_ABI);
    }
}

另外因为是全局操作需要在Application中调用如下的操作即可：

CrashHandler crashHandler = CrashHandler.getInstance();
crashHandler.init(this);

参考了任玉刚博客：

http://blog.youkuaiyun.com/singwhatiwanna/article/details/17289479