Android 不在崩溃

public class NeverCrash {    private CrashHandler mCrashHandler;    private static NeverCrash mInstance;    private NeverCrash() {    }    private static NeverCrash getInstance() {        if (mInstance == null) {            synchronized (NeverCrash.class) {                if (mInstance == null) {                    mInstance = new NeverCrash();                }            }        }        return mInstance;    }    public static void init(CrashHandler crashHandler) {        getInstance().setCrashHandler(crashHandler);    }    private void setCrashHandler(CrashHandler crashHandler) {        mCrashHandler = crashHandler;        new Handler(Looper.getMainLooper()).post(new Runnable() {            @Override            public void run() {                for (; ; ) {                    try {                        Looper.loop();                    } catch (Throwable e) {                        if (mCrashHandler != null) {//捕获异常处理                            mCrashHandler.uncaughtException(Looper.getMainLooper().getThread(), e);                        }                    }                }            }        });        Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {            @Override            public void uncaughtException(Thread t, Throwable e) {                if (mCrashHandler != null) {//捕获异常处理                    mCrashHandler.uncaughtException(t, e);                }            }        });    }    public interface CrashHandler {        void uncaughtException(Thread t, Throwable e);    }

public class App extends Application implements NeverCrash.CrashHandler {    @Override    public void onCreate() {        super.onCreate();        NeverCrash.init(this);    }    private void showToast(final String text) {        if (getMainLooper() == Looper.myLooper()) {            Toast.makeText(getApplicationContext(), text, Toast.LENGTH_SHORT).show();        } else {            new Handler(Looper.getMainLooper()).post(new Runnable() {                @Override                public void run() {                    Toast.makeText(getApplicationContext(), text, Toast.LENGTH_SHORT).show();                }            });        }    }    @Override    public void uncaughtException(Thread t, Throwable e) {        Log.d("Niu", Log.getStackTraceString(e));        showToast(e.getMessage());    }

其实就是主线程一直监视崩溃信息，一旦发生异常（主或子）都会显示。（以前有人跟我说一旦异常崩溃是不可能避免的，当然这里只是在开发阶段，一旦异常内存就会乱，就会闪退，不知道这是什么意思）至于线上崩溃这个就需要自己做采集分析了，推荐美团的文章https://tech.meituan.com/waimai_android_crash.html

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