Android使用SlidingPaneLayout 实现仿微信的滑动返回

2019-10-22 18:12:34

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上周,公司的项目改版要求加上一个右滑返回上一个界面,于是就在网上找了一些开源库打算实现.但是在使用的时候遇见了许多的问题.试了两天用过 https://github.com/ikew0ng/SwipeBackLayout , https://github.com/r0adkll/Slidr 等库都没成功.

使用SlidingPaneLayout 来实现的一个android/273927.html">滑动返回案例然后就看了看发现不错于是就使用了这个.

虽然上面链接里面已近写好啦.但是还是写一下代码:

先看看最终效果:

android,微信,滑动返回,slidingpaneLayout

实现如下:

主要是在baesActivity里面

public class BaesActivity extends AppCompatActivity implements SlidingPaneLayout.PanelSlideListener{ @Override protected void onCreate(@Nullable Bundle savedInstanceState) { initSlideBackClose();//滑动返回的设置 super.onCreate(savedInstanceState); } private void initSlideBackClose() { if (isSupportSwipeBack()) {  SlidingPaneLayout slidingPaneLayout = new SlidingPaneLayout(this);  // 通过反射改变mOverhangSize的值为0，  // 这个mOverhangSize值为菜单到右边屏幕的最短距离，  // 默认是32dp，现在给它改成0  try {  Field overhangSize = SlidingPaneLayout.class.getDeclaredField("mOverhangSize");  overhangSize.setAccessible(true);  overhangSize.set(slidingPaneLayout, 0);  } catch (Exception e) {  e.printStackTrace();  }  slidingPaneLayout.setPanelSlideListener(this);  slidingPaneLayout.setSliderFadeColor(getResources()   .getColor(android.R.color.transparent));  // 左侧的透明视图  View leftView = new View(this);  leftView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));  slidingPaneLayout.addView(leftView, 0);  ViewGroup decorView = (ViewGroup) getWindow().getDecorView();  // 右侧的内容视图  ViewGroup decorChild = (ViewGroup) decorView.getChildAt(0);  decorChild.setBackgroundColor(getResources()   .getColor(android.R.color.white));  decorView.removeView(decorChild);  decorView.addView(slidingPaneLayout);  // 为 SlidingPaneLayout 添加内容视图  slidingPaneLayout.addView(decorChild, 1); } } //设置是否使用滑动返回 protected boolean isSupportSwipeBack() { return true; } @Override public void onPanelSlide(View panel, float slideOffset) { } @Override public void onPanelOpened(View panel) { finish(); } @Override public void onPanelClosed(View panel) { }}

然后让Acitivity继承baesActivity就可以了

public class MainActivity extends BaesActivity

看看效果

android,微信,滑动返回,slidingpaneLayout

怎么会这样!

然后就去看看那需要改动,发现在BaesActivity里面写了一个方法:

 //设置是否使用滑动返回 protected boolean isSupportSwipeBack() { return true; }

在不需要返回的界面重写此方法并返回 false,就行了向这样

 @Override protected boolean isSupportSwipeBack() { return false; }

android,微信,滑动返回,slidingpaneLayout

主界面不滑动的问题解决了,但是还有一个问题在滑动的时候左边显示的是一个白板,这怎么破?

这就要设置 activity 的 style了在AndroidManifest.xml 文件里面找到 application 就是黄色那行,跳进去

 <application android:name=".MyApplication" android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme">//设置样式 <activity android:name=".MainActivity">  <intent-filter>  <action android:name="android.intent.action.MAIN" />  <category android:name="android.intent.category.LAUNCHER" />  </intent-filter> </activity> <activity android:name=".TwoActivity"/> <activity android:name=".ThreeActivity"/> </application>

设置styles.xml ,添加黄色部分的内容

 <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar"> <!-- Customize your theme here. --> <item name="colorPrimary">@color/colorPrimary</item> <item name="colorPrimaryDark">@color/colorPrimaryDark</item> <item name="colorAccent">@color/colorAccent</item> <!--设置窗口背景为透明--> <item name ="android:windowIsTranslucent">true</item> <item name="android:windowBackground">@android:color/transparent</item> </style>

运行起来:

android,微信,滑动返回,slidingpaneLayout

偶买噶! 我的首页怎么变成这样了,透明了?怎么办,

小事,因为我们设置了上面那两行的原因,现在只要把界面的根布局里面添加一个背景色就行了

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:background="#f2f2f2" tools:context="com.mvp.tl.myslidingpanelayoutdemo.MainActivity"> <Button android:id="@+id/next" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="第一个,下一界面" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" /></android.support.constraint.ConstraintLayout>

android,微信,滑动返回,slidingpaneLayout

OK,初步实现就这样了,但是这效果也太丑了吧!

嗯,现在来改改Activity的开启关闭的样式

还是在styles.xml 进行修改<resources>

 <!-- Base application theme. --> <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar"> <!-- Customize your theme here. --> <item name="colorPrimary">@color/colorPrimary</item> <item name="colorPrimaryDark">@color/colorPrimaryDark</item> <item name="colorAccent">@color/colorAccent</item> <!--设置窗口背景为透明--> <item name ="android:windowIsTranslucent">true</item> <item name="android:windowBackground">@android:color/transparent</item> <!--activity启动关闭样式--> <item name="android:windowAnimationStyle">@style/activityAnimation</item> </style> <!--activity启动关闭动画--><style name="activityAnimation" parent="@android:style/Animation"> <item name="android:activityOpenEnterAnimation">@anim/in_from_right</item> <item name="android:activityCloseExitAnimation">@anim/out_to_left</item> </style>

anim/in_from_right.xml和anim/out_to_left在

android,微信,滑动返回,slidingpaneLayout

进行设置:

in_from_right.xml

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"> <translate android:duration="500" android:fillAfter="true" android:fromXDelta="100%p" android:interpolator="@android:anim/accelerate_interpolator" android:toXDelta="0" /></set>

out_to_left.xml

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"> <translate android:duration="500" android:fillAfter="true" android:fromXDelta="0" android:interpolator="@android:anim/accelerate_interpolator" android:toXDelta="100%p" /></set>

然后看看效果

android,微信,滑动返回,slidingpaneLayout

OK,效果出来了.但是当它遇到ViewPager的时候呢?

android,微信,滑动返回,slidingpaneLayout

怎么这样,ViewPager的右滑无法使用了,SlidingPaneLayout的右滑抢了ViewPager的滑动事件.怎么办

自定义SlidingPaneLayout

import android.content.Context;import android.support.v4.view.MotionEventCompat;import android.support.v4.widget.SlidingPaneLayout;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.ViewConfiguration;/*在使用侧滑菜单的时候如果主界面中有ViewPager的时候调用该自定义控件，避免二者的冲突事件的发生 */public class PageEnabledSlidingPaneLayout extends SlidingPaneLayout { private float mInitialMotionX; private float mInitialMotionY; private float mEdgeSlop;//手滑动的距离 public PageEnabledSlidingPaneLayout(Context context) { this(context, null); } public PageEnabledSlidingPaneLayout(Context context, AttributeSet attrs) { this(context, attrs, 0); } public PageEnabledSlidingPaneLayout(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); ViewConfiguration config = ViewConfiguration.get(context); mEdgeSlop = config.getScaledEdgeSlop();//getScaledTouchSlop是一个距离 } @Override public boolean onInterceptTouchEvent(MotionEvent ev) { switch (MotionEventCompat.getActionMasked(ev)) {  case MotionEvent.ACTION_DOWN: {  mInitialMotionX = ev.getX();  mInitialMotionY = ev.getY();  break;  }  case MotionEvent.ACTION_MOVE: {  final float x = ev.getX();  final float y = ev.getY();  // The user should always be able to "close" the pane, so we only check  // for child scrollability if the pane is currently closed.  if (mInitialMotionX > mEdgeSlop && !isOpen() && canScroll(this, false,   Math.round(x - mInitialMotionX), Math.round(x), Math.round(y))) {   // How do we set super.mIsUnableToDrag = true?   // send the parent a cancel event   MotionEvent cancelEvent = MotionEvent.obtain(ev);   cancelEvent.setAction(MotionEvent.ACTION_CANCEL);   return super.onInterceptTouchEvent(cancelEvent);  }  } } return super.onInterceptTouchEvent(ev); }}

并用其替换BaesActivity 里面的SlidingPaneLayout 就可以了

android,微信,滑动返回,slidingpaneLayout