Android捕获全局异常CrashExceptionHander 使用

在Android开发中，捕获异常日志，是分析代码BUG的最好方式。
CrashExceptionHander使用步骤
1：新建一个CrashExceptionHander

public class CrashExceptionHander implements UncaughtExceptionHandler {

    public static final String TAG = "CrashHandler";
    private static CrashExceptionHander INSTANCE = new CrashExceptionHander();
    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>();

    private String userid = "";
    private String version = "";
    private String area;

    private CrashExceptionHander() {
    }

    public static CrashExceptionHander getInstance() {
        return INSTANCE;
    }

    public void init(Context ctx) {
        mContext = ctx.getApplicationContext();
    }

    @Override
    public void uncaughtException(Thread thread, Throwable ex) {

//在这里将错误日志保存到本地或者直接传送到服务器
        collectDeviceInfo(mContext);
        final String msg = saveCrashInfo2File(ex);
        LogUtil.save(msg);
        new Thread(new Runnable() {

            @Override
            public void run() {
                  android.os.Process.killProcess(android.os.Process.myPid());
            }
        }).start();

    }
    /**
     * 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);
                version = versionName;
            }
        } catch (Exception e) {
        }
        Field[] fields = Build.class.getDeclaredFields();
        for (Field field : fields) {
            try {
                field.setAccessible(true);
                infos.put(field.getName(), field.get(null).toString());
            } catch (Exception 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 + "\r\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);


        return sb.toString();
    }

2.在使用的Activity中加入

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        CrashExceptionHander crashHandler = CrashExceptionHander.getInstance();
        crashHandler.init(getApplicationContext());
        Thread.setDefaultUncaughtExceptionHandler(crashHandler);


    }