我使用TabActivity项目中修改过的SectionPagerAdapter创建了我自己的TabLayout菜单(来自空的Activity)。我只更改了getItem()方法并删除了页面标题方法。
public Fragment getItem(int position) {
switch (position)
{
case 0:
HomeActivity home = new HomeActivity();
return home;
case 1:
PayActivity pay = new PayActivity();
return pay;
case 2:
VideoActivity video = new VideoActivity();
return video;
case 3:
BillActivity bill = new BillActivity();
return bill;
default:
return null;
}
}
}
执行
之后 TabLayout tabToolbar = (TabLayout) findViewById(R.id.tabToolbar);
ViewPager viewPager = (ViewPager) findViewById(R.id.container);
SectionsPagerAdapter mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(mSectionsPagerAdapter);
tabToolbar.setupWithViewPager(viewPager);
我的应用已被停止。
如果我评论
tabToolbar.setupWithViewPager(viewPager);
比我的菜单不起作用,但我可以在ViewPager中的片段之间滑动。
我想用我的菜单按钮滑动,同时也用我的鼠标光标滑动。
如果您需要更多信息或资源,请告诉我们。
编辑:
错误日志显示:
09-08 06:19:05.822 4207-4207/com.example.fdai3744.t_online20 E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.fdai3744.t_online20, PID: 4207
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.fdai3744.t_online20/com.example.fdai3744.t_online20.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.graphics.drawable.Drawable.setColorFilter(int, android.graphics.PorterDuff$Mode)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.graphics.drawable.Drawable.setColorFilter(int, android.graphics.PorterDuff$Mode)' on a null object reference
at com.example.fdai3744.t_online20.MainActivity.onCreate(MainActivity.java:37)
at android.app.Activity.performCreate(Activity.java:6679)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
第二次编辑:
我发现我的适配器没有“public CharSequence getPageTitle(int position)”方法。
答案 0 :(得分:1)
在setupwithviewpager;
下面添加以下代码viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabtoolbar));
编辑:
我已经更新了答案,你可以参考这个答案,只选择带有图标的标签。