1、創建 ?ScrollListener 接口監聽滑動距離

public interface ScrollListener {void onScrollChanged(ScrollListenerView scrollView, int x, int y, int oldX, int oldY); }

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view陰影屬性

android:elevation="4dp"

2、重寫 ScrollView? 自定義? ScrollListenerView

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public class ScrollListenerView extends ScrollView {private ScrollListener scrollViewListener = null;public ScrollListenerView(Context context) {super(context);}public ScrollListenerView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);}public ScrollListenerView(Context context, AttributeSet attrs) {super(context, attrs);}public void setScrollListener(ScrollListener scrollViewListener) {this.scrollViewListener = scrollViewListener;}@Overrideprotected void onScrollChanged(int x, int y, int oldX, int oldY) {super.onScrollChanged(x, y, oldX, oldY);if (scrollViewListener != null) {scrollViewListener.onScrollChanged(this, x, y, oldX, oldY);}} }

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判斷scrollView是否滾動到底部方法

@Override protected void onScrollChanged(int x, int y, int oldX, int oldY) {super.onScrollChanged(x, y, oldX, oldY);if (scrollViewListener != null) {scrollViewListener.onScrollChanged(this, x, y, oldX, oldY);}if (getScrollY() + getHeight() >= computeVerticalScrollRange()) {Log.d("lgq", "------滾動到最下方------");} else {Log.d("Lgq", "沒有到最下方");} }

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3、在layout xml文件使用ScrollListenerView

<com.tianxinyw.mapclient.views.ScrollListenerViewandroid:id="@+id/slv"android:layout_width="match_parent"android:layout_height="match_parent"android:scrollbars="none"><RelativeLayoutandroid:layout_width="match_parent"android:layout_height="match_parent"> </RelativeLayout></com.tianxinyw.mapclient.views.ScrollListenerView>

上下層標題漸變色布局，titlelitwo是下層

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:id="@+id/activity_popup"android:orientation="vertical"><LinearLayoutandroid:id="@+id/titlelitwo"android:layout_width="match_parent"android:layout_height="38dp"android:background="@color/homeiconokc"android:gravity="center"android:orientation="horizontal"><TextViewandroid:id="@+id/titletetwo"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="天鑫計費2"android:textColor="@color/white"android:textSize="16dp"android:textStyle="bold"/></LinearLayout><LinearLayoutandroid:id="@+id/lishititleli"android:layout_width="match_parent"android:layout_height="38dp"android:background="@color/homeiconokc"android:gravity="center"android:orientation="horizontal"><TextViewandroid:id="@+id/lishititlete"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="天鑫計費"android:textColor="@color/white"android:textSize="16dp"android:textStyle="bold"/></LinearLayout>

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4、Activity 實現滑動距離監聽接口

public class HomeFragment extends BaseFragment implements ScrollListener{

初始化?

@BindView(R.id.slv) ScrollListenerView slv;

設置監聽

slv.setScrollListener(this);

實現方法：

@Override public void onScrollChanged(ScrollListenerView scrollView, int x, int y, int oldX, int oldY) {if (y - oldY > 0&&y>0) {float f = (y + 0f) / 400;//滑動距離350pxif (f > 1) {f = 1f;}if (f < 0) {f = 0;}if (f > 0 && f < 0.3) {f = (float) 0.333;}Log.i("lgq", "......向上滑。。。" + f + ".......y====" + y);lishititleli.setBackgroundColor(Utils.changeAlpha(ContextCompat.getColor(getActivity(), R.color.homeiconokc), (int) (1 - f * 1 * 0xff)));lishititlete.setTextColor(Utils.changeAlpha(ContextCompat.getColor(getActivity(), R.color.white), (int) (1 - f * 1 * 0xff)));titlelitwo.setBackgroundColor(Utils.changeAlpha(ContextCompat.getColor(getActivity(), R.color.homeiconokc), (int) (f * 1 * 0xff)));titletetwo.setTextColor(Utils.changeAlpha(ContextCompat.getColor(getActivity(), R.color.white), (int) (f * 1 * 0xff)));} else if (y-oldY<0&&y>=0){float f = (y + 0f) / 400;//滑動距離350pxif (f > 1) {f = 1f;}if (f < 0) {f = 0;}Log.e("lgq", "......向xia滑。。。" + f + ".......y====" + y + "......zhi====" + (1 - f * 1 * 0xff) + ".....yy===" + f * 1 * 0xff);if (y <= 0||f<0.01) {lishititleli.setBackgroundColor(Utils.changeAlpha(ContextCompat.getColor(getActivity(), R.color.homeiconokc), (int) (1 * 1 * 0xff)));lishititlete.setTextColor(Utils.changeAlpha(ContextCompat.getColor(getActivity(), R.color.white), (int) (1 * 1 * 0xff)));return;}lishititleli.setBackgroundColor(Utils.changeAlpha(ContextCompat.getColor(getActivity(), R.color.homeiconokc), (int) (1 - f * 1 * 0xff)));lishititlete.setTextColor(Utils.changeAlpha(ContextCompat.getColor(getActivity(), R.color.white), (int) (1 - f * 1 * 0xff)));titlelitwo.setBackgroundColor(Utils.changeAlpha(ContextCompat.getColor(getActivity(), R.color.homeiconokc), (int) (f * 1 * 0xff)));titletetwo.setTextColor(Utils.changeAlpha(ContextCompat.getColor(getActivity(), R.color.white), (int) (f * 1 * 0xff)));}}

工具方法：

/*** 修改顏色透明度* @param color* @param alpha* @return*/ public static int changeAlpha(int color, int alpha) {int red = Color.red(color);int green = Color.green(color);int blue = Color.blue(color);return Color.argb(alpha, red, green, blue); }

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實現效果:向上滑動漸變顏色，顯示隱藏view

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demo鏈接：https://download.csdn.net/download/meixi_android/10966003

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附：左滑右滑手勢

//漸變色float x1 = 0;float x2 = 0;private int nowpersion = 0;@Overridepublic boolean dispatchTouchEvent(MotionEvent ev) {if (ev.getAction() == MotionEvent.ACTION_DOWN) { // Log.i("lgq","ssssMainActivity_dispatchTouchEvent==="+ev.getX());x1 = ev.getX();}return super.dispatchTouchEvent(ev);}@Overridepublic boolean onTouch(View v, MotionEvent event) {if (event.getAction() == MotionEvent.ACTION_MOVE) {x2 = event.getX();float h = x1 - x2;// Log.i("lgq","eee==滑動距離aaa===="+(h)+"......"+nowpersion+"...."+x1);float f = (h + 0f) / 640;//滑動距離350pxif (f > 1) {f = 1f;}if (f < 0) {f = 0;}if (nowpersion == 0 && h < 0) {return false;} else if (nowpersion == 0 && h > 0) {if (f < 0.4) {return false;}TextView textView = tabLayout.getTabAt(1).getCustomView().findViewById(R.id.tab_iv);TextView textView0 = tabLayout.getTabAt(0).getCustomView().findViewById(R.id.tab_iv);textView.setTextColor(changeAlpha(ContextCompat.getColor(MainActivity.this, R.color.textlan), (int) (f * 1 * 0xff)));textView0.setTextColor(changeAlpha(ContextCompat.getColor(MainActivity.this, R.color.texthui), (int) (f * 1 * 0xff)));}}return false;}/*** 修改顏色透明度* @param color* @param alpha* @return*/public int changeAlpha(int color, int alpha) {int red = Color.red(color);int green = Color.green(color);int blue = Color.blue(color);return Color.argb(alpha, red, green, blue);}

總結

以上是生活随笔為你收集整理的android 标题栏颜色渐变和阴影，ScrollView上下滑动监听，及判断scrollView是否滚动到底部的全部內容，希望文章能夠幫你解決所遇到的問題。

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