在抽屉外点击时，应用程序崩溃了....
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/flMain"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:id="@+id/llHeader"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/darker_gray" >
<ImageButton
android:id="@+id/ibMenu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@android:color/transparent"
android:onClick="btnMenu"
android:src="@drawable/ic_launcher" />
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_vertical"
android:text="@string/app_name"/>
</LinearLayout>
<android.support.v4.widget.DrawerLayout
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/background_light"
android:layoutDirection="rtl" >
<ScrollView
android:id="@+id/llMenuBar"
android:layout_width="200dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:choiceMode="singleChoice" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:focusable="true"
android:focusableInTouchMode="true"
android:orientation="vertical"
android:padding="10dp" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:drawableLeft="@drawable/ic_launcher"
android:onClick="btnOption1"
android:text="Option 1" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:drawableLeft="@drawable/ic_launcher"
android:onClick="btnOption2"
android:text="Option 2" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"/>
</LinearLayout>
</LinearLayout>
</ScrollView>
</android.support.v4.widget.DrawerLayout>
</LinearLayout>
</FrameLayout>
java代码就像......
private DrawerLayout mDrawerLayout;
ImageButton ibMenu;
ScrollView llMenuBar;
FrameLayout flMain;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ibMenu = (ImageButton) findViewById(R.id.ibMenu);
flMain = (FrameLayout) findViewById(R.id.flMain);
llMenuBar = (ScrollView) findViewById(R.id.llMenuBar);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerLayout.setScrimColor(Color.parseColor("#80ffffff"));
mDrawerLayout.setDrawerListener(new RightMenuListener());
ibMenu.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
openCloseMenu();
}
});
llMenuBar.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_OUTSIDE) {
openCloseMenu();
}
return false;
}
});
flMain.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View arg0, MotionEvent event) {
openCloseMenu();
return false;
}
});
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
if (isOpen) {
isOpen = false;
mDrawerLayout.closeDrawer(llMenuBar);
ibMenu.setImageResource(R.drawable.ic_launcher);
return true;
} else {
new AlertDialog.Builder(MainActivity.this)
.setTitle("Exit From App")
.setMessage(
"Are you sure, you want to leave application?")
.setCancelable(false)
.setPositiveButton("Yes",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
moveTaskToBack(true);
System.gc();
android.os.Process
.killProcess(android.os.Process
.myPid());
System.exit(10);
finish();
}
})
.setNegativeButton("No",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
}
}).show();
}
}
return super.onKeyDown(keyCode, event);
}
public void btnOption1(View v) {
openCloseMenu();
}
public void btnOption2(View v) {
openCloseMenu();
}
boolean isOpen = false;
public boolean openCloseMenu() {
if (isOpen) {
mDrawerLayout.closeDrawer(llMenuBar);
ibMenu.setImageResource(R.drawable.ic_launcher);
isOpen = false;
} else {
mDrawerLayout.openDrawer(llMenuBar);
ibMenu.setImageResource(R.drawable.ic_launcher);
isOpen = true;
}
return true;
}
private class RightMenuListener implements
android.support.v4.widget.DrawerLayout.DrawerListener {
@Override
public void onDrawerClosed(View view) {
ibMenu.setImageResource(R.drawable.ic_launcher);
isOpen = false;
}
@Override
public void onDrawerOpened(View arg0) {
// TODO Auto-generated method stub
ibMenu.setImageResource(R.drawable.ic_launcher);
isOpen = true;
}
@Override
public void onDrawerSlide(View arg0, float arg1) {
// TODO Auto-generated method stub
}
@Override
public void onDrawerStateChanged(int arg0) {
// TODO Auto-generated method stub
}
}
错误日志就像
android.support.v4.widget.DrawerLayout.isContentView(DrawerLayout.java:840)
at android.support.v4.widget.DrawerLayout.onInterceptTouchEvent(DrawerLayout.java:866)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1822)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1925)
at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1379)
at android.app.Activity.dispatchTouchEvent(Activity.java:2396)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1873)
at android.view.View.dispatchPointerEvent(View.java:7307)
at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3172)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3117)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4153)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4132)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4224)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171)
01-29 15:42:12.592: E/MessageQueue-JNI(4365): at android.os.MessageQueue.nativePollOnce(Native Method)
01-29 15:42:12.592: E/MessageQueue-JNI(4365): at android.os.MessageQueue.next(MessageQueue.java:125)
01-29 15:42:12.592: E/MessageQueue-JNI(4365): at android.os.Looper.loop(Looper.java:124)
01-29 15:42:12.592: E/MessageQueue-JNI(4365): at android.app.ActivityThread.main(ActivityThread.java:4745)
01-29 15:42:12.592: E/MessageQueue-JNI(4365): at java.lang.reflect.Method.invokeNative(Native Method)
01-29 15:42:12.592: E/MessageQueue-JNI(4365): at java.lang.reflect.Method.invoke(Method.java:511)
01-29 15:42:12.592: E/MessageQueue-JNI(4365): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
01-29 15:42:12.592: E/MessageQueue-JNI(4365): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
01-29 15:42:12.592: E/MessageQueue-JNI(4365): at dalvik.system.NativeStart.main(Native Method)
01-29 15:42:12.592: D/AndroidRuntime(4365): Shutting down VM
01-29 15:42:12.592: W/dalvikvm(4365): threadid=1: thread exiting with uncaught exception (group=0xa624b288)
01-29 15:42:12.612: D/dalvikvm(4365): GC_CONCURRENT freed 184K, 3% free 10945K/11207K, paused 11ms+0ms, total 15ms
01-29 15:42:12.612: E/AndroidRuntime(4365): FATAL EXCEPTION: main
01-29 15:42:12.612: E/AndroidRuntime(4365): java.lang.NullPointerException
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.support.v4.widget.DrawerLayout.isContentView(DrawerLayout.java:840)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.support.v4.widget.DrawerLayout.onInterceptTouchEvent(DrawerLayout.java:866)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1822)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2176)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1877)
01-29 15:42:12.612: E/AndroidRuntime(4365): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1925)
01-29 15:42:12.612: E/AndroidRuntime(4365): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1379)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.app.Activity.dispatchTouchEvent(Activity.java:2396)
01-29 15:42:12.612: E/AndroidRuntime(4365): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1873)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.View.dispatchPointerEvent(View.java:7307)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3172)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3117)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4153)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4132)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4224)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.os.MessageQueue.nativePollOnce(Native Method)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.os.MessageQueue.next(MessageQueue.java:125)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.os.Looper.loop(Looper.java:124)
01-29 15:42:12.612: E/AndroidRuntime(4365): at android.app.ActivityThread.main(ActivityThread.java:4745)
01-29 15:42:12.612: E/AndroidRuntime(4365): at java.lang.reflect.Method.invokeNative(Native Method)
01-29 15:42:12.612: E/AndroidRuntime(4365): at java.lang.reflect.Method.invoke(Method.java:511)
01-29 15:42:12.612: E/AndroidRuntime(4365): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
01-29 15:42:12.612: E/AndroidRuntime(4365): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
01-29 15:42:12.612: E/AndroidRuntime(4365): at dalvik.system.NativeStart.main(Native Method)
任何人都可以帮助解决这个问题.....当我按下打开的菜单... app崩溃获得空指针异常..
答案 0 :(得分：1)
我认为对于抽屉布局，DrawerLayout应该是外部布局，例如：
<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">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textViewContent"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
<LinearLayout
android:id="@+id/dl_left_drawer"
android:layout_width="300dp"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_gravity="left">
<TextView
android:id="@+id/left_drawer_TextView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/left_drawer_TextView2"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<ListView android:id="@+id/dl_left_drawer_list"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout></android.support.v4.widget.DrawerLayout>
这里第一个LinearLayout是常规视图，第二个id为dl_left_drawer的是抽屉的布局。
请记住，这些布局可以是任何内容，它们不必是LinearLayout