geekNews 学习总结

1：下移隐藏，上移出现

//android.support.v4.widget.NestedScrollView nsvScroller;
//FrameLayout llDetailBottom;

nsvScroller.setOnScrollChangeListener(new NestedScrollView.OnScrollChangeListener() {
            @Override
            public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {
                if(scrollY - oldScrollY > 0 && isBottomShow) {  //下移隐藏
                    isBottomShow = false;
                    llDetailBottom.animate().translationY(llDetailBottom.getHeight());
                } else if(scrollY - oldScrollY < 0 && !isBottomShow){    //上移出现
                    isBottomShow = true;
                    llDetailBottom.animate().translationY(0);
                }
            }
        });

2:Rxjava 定时轮询，替代handler

 //5s的延迟，5s的循环时间
Subscription subscription = Observable.interval(5, 5, TimeUnit.SECONDS).subscribeOn(AndroidSchedulers.mainThread())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Action1<Long>() {
                    @Override
                    public void call(Long aLong) {
                        // 进行轮播操作
                        Log.e("--------->", "xxxx" + (i++));
                    }
                });

//结束定时
subscription.unsubscribe();

3：使用okhttp3对网络返回内容做缓存，还有日志、超时重连、头部消息的配置

private static void initOkHttp() {
        OkHttpClient.Builder builder = new OkHttpClient.Builder();
        // http://www.jianshu.com/p/93153b34310e
        File cacheFile = new File(SyncStateContract.Constants.CONTENT_DIRECTORY);
        Cache cache = new Cache(cacheFile, 1024 * 1024 * 50);
        Interceptor cacheInterceptor = new Interceptor() {
            @Override
            public Response intercept(Chain chain) throws IOException {
                Request request = chain.request();
                if (!SystemUtil.isNetworkConnected()) {
                    request = request.newBuilder()
                            .cacheControl(CacheControl.FORCE_CACHE)
                            .build();
                }
                Response response = chain.proceed(request);
                if (SystemUtil.isNetworkConnected()) {
                    int maxAge = 0;
                    // 有网络时, 不缓存, 最大保存时长为0
                    response.newBuilder()
                            .header("Cache-Control", "public, max-age=" + maxAge)
                            .removeHeader("Pragma")
                            .build();
                } else {
                    // 无网络时，设置超时为4周
                    int maxStale = 60 * 60 * 24 * 28;
                    response.newBuilder()
                            .header("Cache-Control", "public, only-if-cached, max-stale=" + maxStale)
                            .removeHeader("Pragma")
                            .build();
                }
                return response;
            }
        };
        //设置缓存
        builder.addNetworkInterceptor(cacheInterceptor);
        builder.addInterceptor(cacheInterceptor);
        builder.cache(cache);
        //设置超时
        builder.connectTimeout(10, TimeUnit.SECONDS);
        builder.readTimeout(20, TimeUnit.SECONDS);
        builder.writeTimeout(20, TimeUnit.SECONDS);
        //错误重连
        builder.retryOnConnectionFailure(true);
        OkHttpClient  okHttpClient = builder.build();
    }

4:腾讯X5SDK 

    com.tencent.smtt.sdk.WebView

 5:退出程序

public void exitApp() {
        AppManager.getAppManager().finishAllActivity();
        android.os.Process.killProcess(android.os.Process.myPid());
        System.exit(0);
    }

6:夜间模式切换

        //currentActivity extends AppCompatActivity

        if (isNight) {
            AppCompatDelegate.setDefaultNightMode(
                    AppCompatDelegate.MODE_NIGHT_YES);
        } else {
            AppCompatDelegate.setDefaultNightMode(
                    AppCompatDelegate.MODE_NIGHT_NO);
        }
        //当前页面的重新绘制
        recreate();

资源文件改变：

drawable-xhdpi

drawable-night-xhdpi

colors:（color的name相同）

values

values-night

现在的四种模式：

MODE_NIGHT_NO 日间模式
MODE_NIGHT_YES 夜间模式
MODE_NIGHT_AUTO 根据时间自动切换日夜间模式
MODE_NIGHT_FOLLOW_SYSTEM 默认模式，就是跟随系统的设置，据说有可能以后会在android系统设置中添加日夜间模式的设置，此时如果你的app是默认模式，会根据系统设置变化日夜间模式