导航抽屉xml错误

亲爱的stackoverflowers,

我在我的活动中使用导航抽屉,这里是xml

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/drawer_layout" android:layout_width="match_parent" android:layout_height="match_parent" > <FrameLayout android:id="@+id/content_frame" android:layout_width="match_parent" android:layout_height="match_parent" /> <FrameLayout android:layout_width="240dp" android:layout_height="match_parent" android:layout_gravity="start" android:background="#3a3a3c" > <ImageView android:id="@+id/ImageView01" android:layout_width="240dp" android:layout_height="10dp" android:layout_marginTop="20dp" android:src="@drawable/border" /> <TextView android:id="@+id/tvretailers" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="0dp" android:text="Retailers" android:textColor="#ffffff" android:textSize="20sp" /> <ImageView android:id="@+id/imageView1" android:layout_width="240dp" android:layout_height="10dp" android:layout_marginTop="300dp" android:src="@drawable/border" /> <ListView android:id="@+id/right_drawer_settings" android:layout_width="wrap_content" android:layout_height="250dp" android:layout_marginTop="310dp" android:background="#3a3a3c" > </ListView> <TextView android:id="@+id/TextView01" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="280dp" android:text="Settings" android:textColor="#ffffff" android:textSize="20sp" /> <ListView android:id="@+id/right_drawer_retailers" android:layout_width="wrap_content" android:layout_height="200dp" android:layout_marginTop="30dp" android:background="#3a3a3c" > </ListView> </FrameLayout> </android.support.v4.widget.DrawerLayout> 

但是,一旦我运行应用程序,我得到一个XML错误:

 08-18 01:36:47.751: E/AndroidRuntime(26527): FATAL EXCEPTION: main 08-18 01:36:47.751: E/AndroidRuntime(26527): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.androidarabia.phones/com.androidarabia.Lebanon.LebanonDrawer}: java.lang.ClassCastException: android.widget.FrameLayout$LayoutParams cannot be cast to android.support.v4.widget.DrawerLayout$LayoutParams 08-18 01:36:47.751: E/AndroidRuntime(26527): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2246) 08-18 01:36:47.751: E/AndroidRuntime(26527): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2296) 08-18 01:36:47.751: E/AndroidRuntime(26527): at android.app.ActivityThread.access$700(ActivityThread.java:151) 08-18 01:36:47.751: E/AndroidRuntime(26527): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1281) 08-18 01:36:47.751: E/AndroidRuntime(26527): at android.os.Handler.dispatchMessage(Handler.java:99) 08-18 01:36:47.751: E/AndroidRuntime(26527): at android.os.Looper.loop(Looper.java:137) 08-18 01:36:47.751: E/AndroidRuntime(26527): at android.app.ActivityThread.main(ActivityThread.java:5293) 08-18 01:36:47.751: E/AndroidRuntime(26527): at java.lang.reflect.Method.invokeNative(Native Method) 08-18 01:36:47.751: E/AndroidRuntime(26527): at java.lang.reflect.Method.invoke(Method.java:511) 08-18 01:36:47.751: E/AndroidRuntime(26527): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102) 08-18 01:36:47.751: E/AndroidRuntime(26527): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869) 08-18 01:36:47.751: E/AndroidRuntime(26527): at dalvik.system.NativeStart.main(Native Method) 08-18 01:36:47.751: E/AndroidRuntime(26527): Caused by: java.lang.ClassCastException: android.widget.FrameLayout$LayoutParams cannot be cast to android.support.v4.widget.DrawerLayout$LayoutParams 08-18 01:36:47.751: E/AndroidRuntime(26527): at android.support.v4.widget.DrawerLayout.isDrawerView(DrawerLayout.java:844) 08-18 01:36:47.751: E/AndroidRuntime(26527): at android.support.v4.widget.DrawerLayout.closeDrawer(DrawerLayout.java:1048) 08-18 01:36:47.751: E/AndroidRuntime(26527): at com.androidarabia.Lebanon.LebanonDrawer.selectItem(LebanonDrawer.java:104) 08-18 01:36:47.751: E/AndroidRuntime(26527): at com.androidarabia.Lebanon.LebanonDrawer.onCreate(LebanonDrawer.java:63) 08-18 01:36:47.751: E/AndroidRuntime(26527): at android.app.Activity.performCreate(Activity.java:5250) 08-18 01:36:47.751: E/AndroidRuntime(26527): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1097) 08-18 01:36:47.751: E/AndroidRuntime(26527): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2210) 08-18 01:36:47.751: E/AndroidRuntime(26527): ... 11 more 

之前,我只有一个ListView在FrameLayout,它工作正常,但经过一些修改,我无法得到它的工作! 希望你能帮助! 非常感谢stackoverflowers =)

全码:

 public class LebanonDrawer extends SherlockFragmentActivity { DrawerLayout mDrawerLayout; ListView mDrawerList; ActionBarDrawerToggle mDrawerToggle; String[] title; String[] subtitle; int[] icon; Fragment Lebanon = new Lebanon(); @SuppressWarnings("unchecked") @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.drawer_main); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); mDrawerList = (ListView) findViewById(R.id.right_drawer_retailers); String[] songsArray = { "Do", "RE", "MI", "FA", "SO", "LA", "SO" }; MenuListAdapter mla = new MenuListAdapter(this, songsArray); mDrawerList.setAdapter(mla); mDrawerList.setOnItemClickListener(new DrawerItemClickListener()); getSupportActionBar().setHomeButtonEnabled(true); getSupportActionBar().setDisplayHomeAsUpEnabled(true); mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.drawable.ic_drawer, R.string.drawer_open, R.string.drawer_close) { public void onDrawerClosed(View view) { // TODO Auto-generated method stub super.onDrawerClosed(view); } public void onDrawerOpened(View drawerView) { // TODO Auto-generated method stub super.onDrawerOpened(drawerView); } }; mDrawerLayout.setDrawerListener(mDrawerToggle); if (savedInstanceState == null) { selectItem(0); } } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == android.R.id.home) { if (mDrawerLayout.isDrawerOpen(mDrawerList)) { mDrawerLayout.closeDrawer(mDrawerList); } else { mDrawerLayout.openDrawer(mDrawerList); } } return super.onOptionsItemSelected(item); } private class DrawerItemClickListener implements ListView.OnItemClickListener { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { selectItem(position); } } private void selectItem(int position) { FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); // Locate Position switch (position) { case 0: ft.replace(R.id.content_frame, Lebanon); break; } ft.commit(); mDrawerList.setItemChecked(position, true); // Close drawer mDrawerLayout.closeDrawer(mDrawerList); } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); // Sync the toggle state after onRestoreInstanceState has occurred. mDrawerToggle.syncState(); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); // Pass any configuration change to the drawer toggles mDrawerToggle.onConfigurationChanged(newConfig); } } 

 Caused by: java.lang.ClassCastException: android.widget.FrameLayout$LayoutParams cannot be cast to android.support.v4.widget.DrawerLayout$LayoutParams 

在你的xml布局中, mDrawerList不是mDrawerList的直接后代。 相反,它是一个FrameLayout的后代,它的LayoutParams被使用。

在您当前的设置中,将一个id分配给包含ListView的FrameLayout,在您的活动中find它,并将其用于:

 mDrawerLayout.openDrawer(frameHoldingListView); 

对mDrawerLayout.closeDrawer(…)和mDrawerLayout.isDrawerOpen(…)进行类似的更改。

如果有人使用工具栏有类似的问题,并且:

 mDrawerLayout.openDrawer(mDrawerLayout); 

通过在developer.android.com上进行培训

尝试:

 mDrawerLayout.openDrawer(Gravity.LEFT); 

为了节省大量时间寻找例外的解决scheme:

 java.lang.ClassCastException: android.widget.FrameLayout$LayoutParams cannot be cast to android.support.v4.widget.DrawerLayout$LayoutParams