基于kotlin实现玩安卓app,目前还继续在开发中，主要是练手kotlin和jetpack.zip

# WanAndroidKotlin 基于kotlin实现玩安卓app,目前还继续在开发中，主要是练手kotlin和jetpack 开发环境 macbook、android studio 基于Androidx，使用recyclerview和viewpager2实现页面交互 基于kotlin+viewmodel+livedata实现布局页面 基于kotlin协程+retrofit实现网络请求 抽出基础库，拆分模块，方便开发其他项目 baselibrary->commonlibrary->app baselibrary->commonlibrary->moduleme 功能介绍： - 1.首页视差效果滚动banner - 2.底部菜单切换，状态栏的改变效果 - 3.使用拦截器对Retrofit的出入参数进行挟持修改 ``` class WanAndroidInterceptor : Interceptor { private val TAG = WanAndroidInterceptor::class.java.simpleName override fun intercept(chain: Interceptor.Chain): Response { var request = chain.request() val method = request.method() var response: Response? = null if ("POST" == method) { val body = request.body() //处理请求 if (body is FormBody) { //https://blog.csdn.net/wenyingzhi/article/details/80510249 val builder = FormBody.Builder() for (i in 0 until body.size()) { //这里改为addEncoded builder.addEncoded(body.encodedName(i), body.encodedValue(i)) LogUtil.i( TAG, "WanAndroidInterceptor>>key:" + body.encodedName(i) + ",value:" + body.encodedValue( i ) ) } //增加参数或者加密在这里操作 builder.add("time", SystemClock.elapsedRealtime().toString()) //构造新的请求体,覆盖之前的body val newRequestBody = builder.build() //构建新的request val newRequest = request.newBuilder().post(newRequestBody).build() //proceed response = chain.proceed(newRequest) } else if (body is MultipartBody) { //后面再考虑 //var builder = MultipartBody.Builder() //proceed response = chain.proceed(request) } else { response = chain.proceed(request) } //处理返回 if (response != null && HttpHeaders.hasBody(response)) { val responseBody = response.body() responseBody?.apply { val source: BufferedSource = source() source.request(Long.MAX_VALUE) // Buffer the entire body. val buffer: Buffer = source.buffer() val charset = Charset.forName("UTF-8") val content = buffer.clone().readString(charset) //===打印返回内容，如果解密之类操作，也可以在这里操作 LogUtil.i( TAG, "WanAndroidInterceptor>>>>content:$content" ) //===打印返回内容，如果解密之类操作，也可以在这里操作 if (!StringUtil.isEmpty(content)) { val obj = GsonUtil.gson.fromJson<WanResponse<Any>>( content, WanResponse::class.java ) if (obj.errorCode != 0) { LogUtil.i( TAG, "WanAndroidInterceptor>>errorCode:" + obj.errorCode ) throw ResponseThrowable(obj.errorCode + 1, obj.errorMsg) } } val newResponseBody = ResponseBody.create(contentType(), content) response = response?.newBuilder()?.body(newResponseBody)?.build() } } } if (response == null) { response = chain.proceed(request) } return response!! } } ``` - 4.对携程请求做了二次封装，简单使用 ``` fun asyncExt( block: suspend CoroutineScope.() -> Unit, onError: (rt: ResponseThrowable) -> Unit = {}, isLoading: Boolean = false ) { viewModelScope.launch(CoroutineExceptionHandler { _, e -> onError(ExceptionHandle.handleException(e)) }) { try { if (isLoading) { zShowLoadingDialog() } block.invoke(this) } finally { if (isLoading) { zHideLoadingDialog() } } } } ``` - 5.对imageview增加类型微信上传文件的交互效果 ``` public class DstOutView extends View { private int mH; private int mW; private Paint mPaint = null; private PorterDuffXfermode mPorterDuffXfermode; public DstOutView(Context context) { super(context); init(); } public DstOutView(Context context, @Nullable AttributeSet attrs) { super(context, attrs); init(); } public DstOutView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); init(); } @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP) public DstOutView(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) { super(context, attrs, defStyleAttr, defStyleRes); init(); } private void init() { mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mPorterDuffXfermode = new PorterDuffXfermode(PorterDuff.Mode.DST_OUT); } @Override protected void onLayout(boolean changed, int left, int top, int right, int bottom) { super.onLayout(changed, left, top, right, bottom); mH = getHeight(); mW = getWidth(); } /** * 教程：http://www.360doc.com/content/16/0705/15/21631240_573292156.shtml * * @param canvas */ @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); //禁用硬件加速 setLayerType(View.LAYER_TYPE_SOFTWARE, mPaint); /** * 设置View的离屏缓冲。在绘图的时候新建一个“层”，所有的操作都在该层而不会影响该层以外的图像 * 必须设置，否则设置的PorterDuffXfermode会无效，具体原因不明 */ int sc = canvas.saveLayer(-mW / 2f, -mH / 2f, mW + mW / 2f, mH + mH / 2f, mPaint, Canvas.ALL_SAVE_FLAG); drawBackground(canvas); mPaint.setXfermode(mPorterDuffXfermode); drawHollowFileds(canvas); mPaint.setXfermode(null); /** * 还原画布，与canvas.saveLayer配套使用 */ canvas.restoreToCount(sc); } private void drawBackground(Canvas canvas) { mPaint.setColor(0x88000000); canvas.drawRect(0, 0, mW, mH, mPaint); } private void drawHollowFileds(Canvas canvas) { mPaint.setColor(Color.YELLOW); canvas.drawArc(-mW / 2f, -mH / 2f, mW + mW / 2f, mH + mH / 2f, -90, 360f * progress / 100f, true, mPaint); } private int progress = 1; public void setProgress(int progress) { this.progress = progress; setVisibility(progress >= 100 ? GONE : VISIBLE); invalidate(); } } ``` 引用库： ``` //第三方库 def eventbus_version = '3.2.0' //参考博客文章：https://www.jianshu.com/p/7ed3b4ca0d8b api "org.greenrobot:eventbus:$eventbus_version" kapt "org.greenrobot:eventbus-annotation-processor:$eventbus_version" //https://github.com/square/retrofit