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Android应用总是会不可避免的发生crash，也就是崩溃。Android提供了处理这类问题的方法，当crash发生的时候，系统就会回调UncaughtExceptionHandler的uncaughtException方法。在uncaughtException方法中就可以获取到异常信息，可以选择将异常信息存储到sd卡，然后在合适的时候将其上传到服务器。
实现方法：
<1> 创建一个类CrashHanlder继承UnCaughtExceptionHandler,实现里面的uncaughtException方法
public class CrashHandler implements Thread.UncaughtExceptionHandler {private static CrashHandler crashHandler;private Context context;private Thread.UncaughtExceptionHandler mDefaultCrashHandler;private static final String PATH = Environment.getExternalStorageDirectory().getPath() + "/crash/log/";private static final String FILE_NAME = "crash";private static final String FILE_NAME_SUFFIX = ".trace";public static CrashHandler getInstance(){if(crashHandler == null){crashHandler = new CrashHandler();}return crashHandler;}public void init(Context context){context = context.getApplicationContext();//设置系统默认异常处理器Thread.setDefaultUncaughtExceptionHandler(this);mDefaultCrashHandler = Thread.getDefaultUncaughtExceptionHandler();}@Overridepublic void uncaughtException(Thread t, Throwable e) {try {//将异常信息导出到SD卡中dumpExceptionToSDCard(e);
// //上传异常信息到服务器，以便开发人员分析
// uploadExceptionToServer();}catch (Exception e1){e1.printStackTrace();}e.printStackTrace();if(mDefaultCrashHandler != null){mDefaultCrashHandler.uncaughtException(t,e);}else{Process.killProcess(Process.myPid());}}private void dumpExceptionToSDCard(Throwable ex) throws Exception{//判断SD卡是否存在或能否使用，不存在或无法使用就返回if(!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){return;}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.createNewFile();}PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter(file)));pw.println(time);dumpPhoneInfo(pw);pw.println();ex.printStackTrace(pw);}private void dumpPhoneInfo(PrintWriter pw) throws PackageManager.NameNotFoundException {PackageManager pm = context.getPackageManager();PackageInfo pi = pm.getPackageInfo(context.getPackageName(),PackageManager.GET_ACTIVITIES);pw.println("APP Version");pw.println(pi.versionName);pw.println("_");pw.println(pi.versionCode);//Android版本号pw.println("OS Version: ");pw.println(Build.VERSION.RELEASE);pw.println("_");pw.println(Build.VERSION.SDK_INT);//手机制造商pw.println("Vendor:");pw.println(Build.MANUFACTURER);//手机号pw.println("Model:");pw.println(Build.MODEL);//CPU架构pw.println("CPU ABI:");pw.println(Build.CPU_ABI);}}
<2> 在Application的onCreate方法中调用
CrashHandler crashHandler = CrashHandler.getInstance();crashHandler.init(this);
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