public class CrashHandler implements Thread.UncaughtExceptionHandler {
  private static final String TAG = "CrashHandler";
  private static final boolean DEBUG = true;
  //文件路径
  private static final String PATH = Environment.getExternalStorageDirectory().getPath() +File.separator+ "crash";
  private static final String FILE_NAME = "crash";
  private static final String FILE_NAME_SUFEIX = ".trace";
  private static Thread.UncaughtExceptionHandler mDefaultCrashHandler;
  private static CrashHandler mCrashHandler = new CrashHandler();
  private Context mContext;

  private CrashHandler() {
  }

  public static CrashHandler getInstance() {
    return mCrashHandler;
  }

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

  @Override
  public void uncaughtException(Thread thread, Throwable ex) {
    try {
      //将文件写入sd卡
      writeToSDcard(ex);
      //写入后在这里可以进行上传操作
    } catch (IOException e) {
      e.printStackTrace();
    } catch (PackageManager.NameNotFoundException e) {
      e.printStackTrace();
    }
    ex.printStackTrace();
    //如果系统提供了默认异常处理就交给系统进行处理，否则自己进行处理。
    if (mDefaultCrashHandler != null) {
      mDefaultCrashHandler.uncaughtException(thread, ex);
    } else {
      Process.killProcess(Process.myPid());
    }
  }

  //将异常写入文件
  private void writeToSDcard(Throwable ex) throws IOException, PackageManager.NameNotFoundException {
    //如果没有SD卡，直接返回
    if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
      return;
    }
    File filedir = new File(PATH);
    if (!filedir.exists()) {
      filedir.mkdirs();
    }
    long currenttime = System.currentTimeMillis();
    String time = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date(currenttime));

    File exfile = new File(PATH +File.separator+FILE_NAME+time + FILE_NAME_SUFEIX);
    PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter(exfile)));
    Log.e("错误日志文件路径",""+exfile.getAbsolutePath());
    pw.println(time);
    PackageManager pm = mContext.getPackageManager();
    PackageInfo pi = pm.getPackageInfo(mContext.getPackageName(), PackageManager.GET_ACTIVITIES);
    //当前版本号
    pw.println("App Version:" + pi.versionName + "_" + pi.versionCode);
    //当前系统
    pw.println("OS version:" + Build.VERSION.RELEASE + "_" + Build.VERSION.SDK_INT);
    //制造商
    pw.println("Vendor:" + Build.MANUFACTURER);
    //手机型号
    pw.println("Model:" + Build.MODEL);
    //CPU架构
    pw.println("CPU ABI:" + Build.CPU_ABI);

    ex.printStackTrace(pw);
    pw.close();

  }


}

public class BaseApplication extends Application {
  @Override
  public void onCreate() {
    super.onCreate();
    CrashHandler crashHandler=CrashHandler.getInstance();
    crashHandler.init(this);
  }
}

 mButton.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View view) {
        throw new RuntimeException("抛出一个异常");
      }
    });