Java android中左右滑动菜单中的NullPointerException
我想在我的应用程序中实现左右滑动菜单,所以我从GitUb下载了Project。Java android中左右滑动菜单中的NullPointerException,java,android,slidingmenu,Java,Android,Slidingmenu,我想在我的应用程序中实现左右滑动菜单,所以我从GitUb下载了Project。来源: 我还添加了ABS作为库,然后我得到了错误方法getSupportActionBar()对于BaseActivity extends SlidingFragmentActivity中的类型BaseActivity未定义,因此我将extendsSlidingFragmentActivity替换为extends SherlockFragmentActivity implements SlidingActivityBa
来源: 我还添加了ABS作为库,然后我得到了错误
方法getSupportActionBar()对于BaseActivity extends SlidingFragmentActivity
中的类型BaseActivity
未定义,因此我将extendsSlidingFragmentActivity
替换为extends SherlockFragmentActivity implements SlidingActivityBase
,以便错误消失。在此之后,我运行Project,它在
LeftAndRightActivity.java
中看到错误NullPointerException
行中出现错误:super.onCreate(savedInstanceState)
我需要在这个项目中做多少更改?是否有符合我要求的运行项目样本?
Logcat:
05-23 11:53:32.417: E/AndroidRuntime(345): FATAL EXCEPTION: main
05-23 11:53:32.417: E/AndroidRuntime(345): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.jeremyfeinstein.slidingmenu.example/com.jeremyfeinstein.slidingmenu.example.LeftAndRightActivity}: java.lang.NullPointerException
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.os.Handler.dispatchMessage(Handler.java:99)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.os.Looper.loop(Looper.java:123)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread.main(ActivityThread.java:3683)
05-23 11:53:32.417: E/AndroidRuntime(345): at java.lang.reflect.Method.invokeNative(Native Method)
05-23 11:53:32.417: E/AndroidRuntime(345): at java.lang.reflect.Method.invoke(Method.java:507)
05-23 11:53:32.417: E/AndroidRuntime(345): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
05-23 11:53:32.417: E/AndroidRuntime(345): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
05-23 11:53:32.417: E/AndroidRuntime(345): at dalvik.system.NativeStart.main(Native Method)
05-23 11:53:32.417: E/AndroidRuntime(345): Caused by: java.lang.NullPointerException
05-23 11:53:32.417: E/AndroidRuntime(345): at com.jeremyfeinstein.slidingmenu.example.BaseActivity.onCreate(BaseActivity.java:51)
05-23 11:53:32.417: E/AndroidRuntime(345): at com.jeremyfeinstein.slidingmenu.example.LeftAndRightActivity.onCreate(LeftAndRightActivity.java:22)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
05-23 11:53:32.417: E/AndroidRuntime(345): ... 11 more
public class LeftAndRightActivity extends BaseActivity {
public LeftAndRightActivity() {
super(R.string.left_and_right);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getSlidingMenu().setMode(SlidingMenu.LEFT_RIGHT);
getSlidingMenu().setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);
setContentView(R.layout.content_frame);
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.content_frame, new SampleListFragment())
.commit();
getSlidingMenu().setSecondaryMenu(R.layout.menu_frame_two);
getSlidingMenu().setSecondaryShadowDrawable(R.drawable.shadowright);
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.menu_frame_two, new SampleListFragment())
.commit();
}
}
public class BaseActivity extends SlidingFragmentActivity {
private int mTitleRes;
protected ListFragment mFrag;
public BaseActivity(int titleRes) {
mTitleRes = titleRes;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle(mTitleRes);
// set the Behind View
setBehindContentView(R.layout.menu_frame);
if (savedInstanceState == null) {
FragmentTransaction t = this.getSupportFragmentManager().beginTransaction();
mFrag = new SampleListFragment();
t.replace(R.id.menu_frame, mFrag);
t.commit();
} else {
mFrag = (ListFragment)this.getSupportFragmentManager().findFragmentById(R.id.menu_frame);
}
// customize the SlidingMenu
SlidingMenu sm = getSlidingMenu();
sm.setShadowWidthRes(R.dimen.shadow_width);
sm.setShadowDrawable(R.drawable.shadow);
sm.setBehindOffsetRes(R.dimen.slidingmenu_offset);
sm.setFadeDegree(0.35f);
sm.setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
toggle();
return true;
case R.id.github:
Util.goToGitHub(this);
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getSupportMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
LeftandRightActivity.java:
05-23 11:53:32.417: E/AndroidRuntime(345): FATAL EXCEPTION: main
05-23 11:53:32.417: E/AndroidRuntime(345): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.jeremyfeinstein.slidingmenu.example/com.jeremyfeinstein.slidingmenu.example.LeftAndRightActivity}: java.lang.NullPointerException
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.os.Handler.dispatchMessage(Handler.java:99)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.os.Looper.loop(Looper.java:123)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread.main(ActivityThread.java:3683)
05-23 11:53:32.417: E/AndroidRuntime(345): at java.lang.reflect.Method.invokeNative(Native Method)
05-23 11:53:32.417: E/AndroidRuntime(345): at java.lang.reflect.Method.invoke(Method.java:507)
05-23 11:53:32.417: E/AndroidRuntime(345): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
05-23 11:53:32.417: E/AndroidRuntime(345): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
05-23 11:53:32.417: E/AndroidRuntime(345): at dalvik.system.NativeStart.main(Native Method)
05-23 11:53:32.417: E/AndroidRuntime(345): Caused by: java.lang.NullPointerException
05-23 11:53:32.417: E/AndroidRuntime(345): at com.jeremyfeinstein.slidingmenu.example.BaseActivity.onCreate(BaseActivity.java:51)
05-23 11:53:32.417: E/AndroidRuntime(345): at com.jeremyfeinstein.slidingmenu.example.LeftAndRightActivity.onCreate(LeftAndRightActivity.java:22)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
05-23 11:53:32.417: E/AndroidRuntime(345): ... 11 more
public class LeftAndRightActivity extends BaseActivity {
public LeftAndRightActivity() {
super(R.string.left_and_right);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getSlidingMenu().setMode(SlidingMenu.LEFT_RIGHT);
getSlidingMenu().setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);
setContentView(R.layout.content_frame);
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.content_frame, new SampleListFragment())
.commit();
getSlidingMenu().setSecondaryMenu(R.layout.menu_frame_two);
getSlidingMenu().setSecondaryShadowDrawable(R.drawable.shadowright);
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.menu_frame_two, new SampleListFragment())
.commit();
}
}
public class BaseActivity extends SlidingFragmentActivity {
private int mTitleRes;
protected ListFragment mFrag;
public BaseActivity(int titleRes) {
mTitleRes = titleRes;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle(mTitleRes);
// set the Behind View
setBehindContentView(R.layout.menu_frame);
if (savedInstanceState == null) {
FragmentTransaction t = this.getSupportFragmentManager().beginTransaction();
mFrag = new SampleListFragment();
t.replace(R.id.menu_frame, mFrag);
t.commit();
} else {
mFrag = (ListFragment)this.getSupportFragmentManager().findFragmentById(R.id.menu_frame);
}
// customize the SlidingMenu
SlidingMenu sm = getSlidingMenu();
sm.setShadowWidthRes(R.dimen.shadow_width);
sm.setShadowDrawable(R.drawable.shadow);
sm.setBehindOffsetRes(R.dimen.slidingmenu_offset);
sm.setFadeDegree(0.35f);
sm.setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
toggle();
return true;
case R.id.github:
Util.goToGitHub(this);
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getSupportMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
BaseActivity.java:
05-23 11:53:32.417: E/AndroidRuntime(345): FATAL EXCEPTION: main
05-23 11:53:32.417: E/AndroidRuntime(345): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.jeremyfeinstein.slidingmenu.example/com.jeremyfeinstein.slidingmenu.example.LeftAndRightActivity}: java.lang.NullPointerException
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.os.Handler.dispatchMessage(Handler.java:99)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.os.Looper.loop(Looper.java:123)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread.main(ActivityThread.java:3683)
05-23 11:53:32.417: E/AndroidRuntime(345): at java.lang.reflect.Method.invokeNative(Native Method)
05-23 11:53:32.417: E/AndroidRuntime(345): at java.lang.reflect.Method.invoke(Method.java:507)
05-23 11:53:32.417: E/AndroidRuntime(345): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
05-23 11:53:32.417: E/AndroidRuntime(345): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
05-23 11:53:32.417: E/AndroidRuntime(345): at dalvik.system.NativeStart.main(Native Method)
05-23 11:53:32.417: E/AndroidRuntime(345): Caused by: java.lang.NullPointerException
05-23 11:53:32.417: E/AndroidRuntime(345): at com.jeremyfeinstein.slidingmenu.example.BaseActivity.onCreate(BaseActivity.java:51)
05-23 11:53:32.417: E/AndroidRuntime(345): at com.jeremyfeinstein.slidingmenu.example.LeftAndRightActivity.onCreate(LeftAndRightActivity.java:22)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-23 11:53:32.417: E/AndroidRuntime(345): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
05-23 11:53:32.417: E/AndroidRuntime(345): ... 11 more
public class LeftAndRightActivity extends BaseActivity {
public LeftAndRightActivity() {
super(R.string.left_and_right);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getSlidingMenu().setMode(SlidingMenu.LEFT_RIGHT);
getSlidingMenu().setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);
setContentView(R.layout.content_frame);
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.content_frame, new SampleListFragment())
.commit();
getSlidingMenu().setSecondaryMenu(R.layout.menu_frame_two);
getSlidingMenu().setSecondaryShadowDrawable(R.drawable.shadowright);
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.menu_frame_two, new SampleListFragment())
.commit();
}
}
public class BaseActivity extends SlidingFragmentActivity {
private int mTitleRes;
protected ListFragment mFrag;
public BaseActivity(int titleRes) {
mTitleRes = titleRes;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle(mTitleRes);
// set the Behind View
setBehindContentView(R.layout.menu_frame);
if (savedInstanceState == null) {
FragmentTransaction t = this.getSupportFragmentManager().beginTransaction();
mFrag = new SampleListFragment();
t.replace(R.id.menu_frame, mFrag);
t.commit();
} else {
mFrag = (ListFragment)this.getSupportFragmentManager().findFragmentById(R.id.menu_frame);
}
// customize the SlidingMenu
SlidingMenu sm = getSlidingMenu();
sm.setShadowWidthRes(R.dimen.shadow_width);
sm.setShadowDrawable(R.drawable.shadow);
sm.setBehindOffsetRes(R.dimen.slidingmenu_offset);
sm.setFadeDegree(0.35f);
sm.setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
toggle();
return true;
case R.id.github:
Util.goToGitHub(this);
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getSupportMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
如果您想添加左右两侧的滑动菜单,只需添加
mSlidingMenu.setMode(SlidingMenu.LEFT_RIGHT);
如果只需要左滑块,则添加
mSlidingMenu.setMode(SlidingMenu.LEFT);
对于右侧滑块,添加
mSlidingMenu.setMode(SlidingMenu.RIGHT);
其中mSlidingMenu
是库的对象,所以像下面这样声明它SlidingMenu mSlidingMenu代码>
就这样,现在您可以从两边滑动。请发布您的整个活动。如果没有基本活动代码,我们将无法帮助您。java@Jens,查看更新的帖子BaseActivity.java
是旧文件,表示我已删除“SherlockFragmentActivity”。@JeetenParmar无需使用滑动菜单。使用具有向后兼容性的NavigationDrawer哪一行是BaseActivity中的第51行?