Android使用SlidingPaneLayout实现仿IOS滑动返回

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android supportV4包提供了一个强大的Layout——SlidingPaneLayout,这个布局可以实现侧滑菜单,关于怎么使用这里就不再介绍了,搜一下就会有很多使用的例子,这里只介绍使用SlidingPaneLayout实现滑动返回。

思路:

1.将SlidingPaneLayout左侧view背景设置为透明;

2.监听滑动事件,当左侧view完全展示时关闭当前Activity。


代码很简单

public class DragBackLayout extends SlidingPaneLayout implements SlidingPaneLayout.PanelSlideListener {    private Context context;    private Activity activity;    private boolean mFirstLayout = true;    public DragBackLayout(Context context, AttributeSet attrs) {        super(context, attrs);        this.context = context;    }    @Override    protected void onLayout(boolean changed, int l, int t, int r, int b) {        super.onLayout(changed, l, t, r, b);        initView();    }    private void initView(){        //如果已经添加过,则不再添加        if(!mFirstLayout){            return;        }        ViewGroup.LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);        //透明布局        FrameLayout transparentLayout = new FrameLayout(context);        //设置透明背景        transparentLayout.setBackgroundColor(Color.TRANSPARENT);        addView(transparentLayout, 0, lp);        mFirstLayout = false;    }    /**     * 设置滑动返回     * @param activity     */    public void setDragBack(Activity activity){        setPanelSlideListener(this);        this.activity = activity;    }    @Override    public void onPanelSlide(View panel, float slideOffset) {    }    @Override    public void onPanelOpened(View panel) {        if(this.activity != null){            activity.finish();            activity.overridePendingTransition(0, 0);        }    }    @Override    public void onPanelClosed(View panel) {    }}


使用:

页面布局:

<?xml version="1.0" encoding="utf-8"?><com.lc.view.DragBackLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/activity_test"    android:layout_width="match_parent"    android:layout_height="match_parent">    <RelativeLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:background="#000000">        <android.support.v7.widget.RecyclerView            android:id="@+id/activity_test_rv"            android:layout_width="match_parent"            android:layout_height="match_parent"/>    </RelativeLayout></com.lc.view.DragBackLayout>


Java代码

        dbl = (DragBackLayout) findViewById(R.id.activity_test);        dbl.setDragBack(this);

效果


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