Java SlidingPaneLayout isSlideable（）方法不起作用

我有滑动窗格布局

<android.support.v4.widget.SlidingPaneLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/slidingPaneLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <fragment
        android:id="@+id/first_fragment"
        android:layout_width="@dimen/first_pane_width"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        class="com.example.example.FirstFragment"
        tools:layout="@layout/fragment_first" />

    <fragment
        android:id="@+id/second_fragment"
        android:layout_width="@dimen/second_pane_width"
        android:layout_weight="1"
        android:layout_height="match_parent"
        class="com.example.example.SecondFragment"
        tools:layout="@layout/fragment_second`enter code here`" />

</android.support.v4.widget.SlidingPaneLayout>

但是slidengpanelayout.isSlideable始终返回false。 我尝试在手机和模拟器Nexus7上运行该应用程序，但它总是返回相同的结果。 在调试模式下，slidingPaneLayout对象的mCanSlide变量始终为false

谁能告诉我我做错了什么？谢谢。

请检查

isSlaydeble=false;

slidingPaneLayout = (SlidingPaneLayout) findViewById(R.id.dl_menu);
slidingPaneLayout.setPanelSlideListener(new SlidingPaneLayout.PanelSlideListener() {
            @Override
            public void onPanelSlide(View view, float v) {
                isSlaydeble=true;
            }

            @Override
            public void onPanelOpened(View view) {
            }

            @Override
            public void onPanelClosed(View view) {
            }
        });



<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SlidingPaneLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/dl_menu"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    <ListView
            android:id="@+id/lv_menu"
            android:layout_width="240dp"
            android:layout_gravity="left"
            android:layout_height="match_parent"
            android:background="#FFFFFF"
            />

    <FrameLayout
            android:id="@+id/fl_fragment_container"
            android:layout_width="match_parent"
            android:background="#0000FF"
            android:layout_gravity="right"
            android:layout_height="match_parent">
    </FrameLayout>


</android.support.v4.widget.SlidingPaneLayout>

---

我想你是在打电话。这是一个很快就能解决的问题。尝试使用viewtreeobserver检查布局过程是否完成，并应用该方法

isSlaydeble=false;

slidingPaneLayout = (SlidingPaneLayout) findViewById(R.id.dl_menu);
slidingPaneLayout.setPanelSlideListener(new SlidingPaneLayout.PanelSlideListener() {
            @Override
            public void onPanelSlide(View view, float v) {
                isSlaydeble=true;
            }

            @Override
            public void onPanelOpened(View view) {
            }

            @Override
            public void onPanelClosed(View view) {
            }
        });



<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SlidingPaneLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/dl_menu"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    <ListView
            android:id="@+id/lv_menu"
            android:layout_width="240dp"
            android:layout_gravity="left"
            android:layout_height="match_parent"
            android:background="#FFFFFF"
            />

    <FrameLayout
            android:id="@+id/fl_fragment_container"
            android:layout_width="match_parent"
            android:background="#0000FF"
            android:layout_gravity="right"
            android:layout_height="match_parent">
    </FrameLayout>


</android.support.v4.widget.SlidingPaneLayout>