我正在登录页面,基于Androidhive教程,问题是 Viewpager
工作正常2布局,但 3 layouts app gonna crash .
在androidhive教程中使用2布局但我想使用3因为我出现并崩溃 .
以下是代码:
XML
<LinearLayout
android:id="@+id/layout_phone_registration"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@color/colorPrimary"
android:gravity="center_horizontal"
android:orientation="vertical">
<ImageView
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="25dp"
android:layout_marginTop="100dp"
android:src="@mipmap/ic_launcher" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="25dp"
android:gravity="center_horizontal"
android:inputType="textCapWords"
android:paddingLeft="40dp"
android:paddingRight="40dp"
android:text="@string/msg_enter_mobile"
android:textColor="@android:color/white"
android:textSize="14dp" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<EditText
android:id="@+id/inputMobile"
android:layout_width="240dp"
android:layout_height="wrap_content"
android:background="@android:color/white"
android:fontFamily="sans-serif-light"
android:hint="@string/lbl_mobile"
android:inputType="phone"
android:maxLength="12"
android:padding="5dp"
android:textColor="@color/colorPrimary"
android:textCursorDrawable="@null"
android:textSize="18dp" />
<Button
android:id="@+id/btn_request_sms"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="25dp"
android:background="@color/colorPrimaryDark"
android:text="@string/lbl_next"
android:textColor="@android:color/white"
android:textSize="14dp" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:id="@+id/layout_otp"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@color/colorPrimary"
android:gravity="center_horizontal"
android:orientation="vertical">
<ImageView
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="25dp"
android:layout_marginTop="100dp"
android:src="@mipmap/ic_launcher" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="15dp"
android:gravity="center_horizontal"
android:paddingLeft="40dp"
android:paddingRight="40dp"
android:text="@string/msg_sit_back"
android:textColor="@android:color/white"
android:textSize="16dp" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="25dp"
android:gravity="center_horizontal"
android:paddingLeft="40dp"
android:paddingRight="40dp"
android:text="@string/msg_manual_otp"
android:textColor="@android:color/white"
android:textSize="12dp" />
<EditText
android:id="@+id/inputOtp"
android:layout_width="120dp"
android:layout_height="wrap_content"
android:background="@android:color/white"
android:fontFamily="sans-serif-light"
android:gravity="center_horizontal"
android:hint="@string/lbl_enter_otp"
android:inputType="number"
android:maxLength="6"
android:padding="10dp"
android:textCursorDrawable="@null"
android:textSize="18dp" />
<Button
android:id="@+id/btn_verify_otp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="25dp"
android:background="@color/colorPrimaryDark"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:text="@string/lbl_submit"
android:textColor="@android:color/white"
android:textSize="14dp" />
</LinearLayout>
<LinearLayout
android:id="@+id/layout_complete_registration"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@color/colorPrimary"
android:gravity="center_horizontal"
android:orientation="vertical">
<EditText
android:id="@+id/inputName"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="15dp"
android:background="@android:color/white"
android:fontFamily="sans-serif-light"
android:hint="@string/lbl_name"
android:padding="5dp"
android:singleLine="true"
android:textColor="@color/colorPrimary"
android:textSize="18dp" />
<EditText
android:id="@+id/inputAddress"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="15dp"
android:background="@android:color/white"
android:fontFamily="sans-serif-light"
android:hint="@string/lbl_email"
android:padding="5dp"
android:textColor="@color/colorPrimary"
android:textSize="18dp" />
<Button
android:id="@+id/btn_register_user"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="25dp"
android:background="@color/colorPrimaryDark"
android:text="@string/lbl_next"
android:textColor="@android:color/white"
android:textSize="14dp" />
</LinearLayout>
</ir.atlaspio.atlasdrinkingservice.AdvancedUI.MyViewPager>>
<ProgressBar
android:id="@+id/progressBar"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_gravity="center"
android:layout_marginBottom="60dp"
android:indeterminateTint="@color/colorAccent"
android:indeterminateTintMode="src_atop"
android:visibility="gone" />
<LinearLayout
android:id="@+id/layout_edit_mobile"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="50dp"
android:gravity="center"
android:orientation="horizontal">
<TextView
android:id="@+id/txt_edit_mobile"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@android:color/white"
android:textSize="16dp" />
<ImageButton
android:id="@+id/btn_edit_mobile"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_marginLeft="10dp"
android:background="@null"
android:src="@drawable/ic_exit_to_app_black_24dp" />
</LinearLayout>
Java
private ViewPager viewPager;
private ViewPagerAdapter adapter;
OnCreate =>
viewPager.setCurrentItem(0);
adapter = new ViewPagerAdapter();
viewPager.setAdapter(adapter);
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
Public Class Activity =>
class ViewPagerAdapter extends PagerAdapter {
@Override
public int getCount() {
return 3;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == ((View) object);
}
public Object instantiateItem(View collection, int position) {
int resId = 0;
switch (position) {
case 0:
resId = R.id.layout_phone_registration;
break;
case 1:
resId = R.id.layout_otp;
break;
case 2:
resId = R.id.layout_complete_registration;
break;
}
return findViewById(resId);
}
}
Logcat
08-29 10:48:12.426 4499-4499 / ir.atlaspio.atlasdrinkingservice E / InputEventSender:异常调度完成信号 . 08-29 10:48:12.426 4499-4499 / ir.atlaspio.atlasdrinkingservice E / MessageQueue-JNI:MessageQueue回调中的异常:handleReceiveCallback 08-29 10:48:12.436 4499-4499 / ir.atlaspio.atlasdrinkingservice E / MessageQueue- JNI:java.lang.UnsupportedOperationException:在android.support.v4.view.PagerAdapter.destroyItem(PagerAdapter.java:android.support.v4.view.PagerAdapter.destroyItem(PagerAdapter.java:201)中未覆盖必需的方法destroyItem . 128)在android.support.v4.view.View上的android.support.v4.view.ViewPager.populate(ViewPager.java:1172)android.support.v4.view.Ron . (ViewPager.java:663)android.support.v4.view.ViewPager上的android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:663)在Android的android.support.v4.view.ViewPager.pageRight(ViewPager.java:2888)的android.support.v4.view.ViewPager.setCurrentItem(ViewPager.java:617)的.setCurrentItemInternal(ViewPager.java:625) . android.support.v4.view.Vi上的android.support.v4.view.ViewPager.executeKeyEvent(ViewPager.java:2764)上的support.v4.view.ViewPager.arrowScroll(ViewPager.java:2844) ewPager.dispatchKeyEvent(ViewPager.java:2738)位于android.view.ViewGroup中的android.view.ViewGroup上的android.view.ViewGroup中的android.view.ViewGroup . .java:1408)在android.view.ViewGroup上的android.view.ViewGroup.DispatchKeyEvent(ViewGroup.java:1408)上的android.view.ViewGroup.DispatchKeyEvent(ViewGroup.java:1408) at com.android.internal.policy.impl.PhoneWindow $ DecorView.superDispatchKeyEvent(PhoneWindow.java:2035)at android.app.Activity的com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1505)位于android.support.v7.view.WindowCallbackWrapper.dispatchKeyEvent(WindowCallbackWrapper.java:58)的Android.support.v7.app.AppCompatActivity.dispatchKeyEvent(AppCompatActivity.java:534)上的.dispatchKeyEvent(Activity.java:2418) . support.v7.app.AppCompatDelegateImplBase $ AppCompatWindowCallbackBase.dispatchKeyEvent(AppCompatDelegateImplBase.java :316)在android.view.ViewRootImpl $的android.view.ViewRootImpl $ ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:3876)的com.android.internal.policy.impl.PhoneWindow $ DecorView.dispatchKeyEvent(PhoneWindow.java:1962)在Android.view.ViewRootImpl上的android.view.ViewRootImpl $ InputStage.deliver(ViewRootImpl.java:3423)中的ViewPostImeInputStage.onProcess(ViewRootImpl.java:3850)在android.view.ViewRootImpl上的android.view.ViewRootImpl $ InputStage.onDeliverToNext(ViewRootImpl.java:3473) $ inputStage.forward(ViewRootImpl.java:3442)位于android.view上的android.view.ViewRootImpl $ AsyncInputStage.forward(ViewRootImpl.java:3549)android.view.ViewRootImpl $ InputStage.apply(ViewRootImpl.java:3450) . android.view.ViewRootImpl上的ViewRootImpl $ AsyncInputStage.apply(ViewRootImpl.java:3606)android.view.ViewRootImpl $ InputStage.deliver(ViewRootImpl.java:3423)android.view上的android.view.ViewRootImpl $ InputStage.onDeliverToNext(ViewRootImpl.java:3473) .ViewRootImpl $ InputStage.forward(ViewRootImpl.java:3442)在android.view.ViewRootImpl $ InputStage.apply(View RootImpl.java:3450)android.view.ViewRootImpl $ InputStage.deliver(ViewRootImpl.java:3423)android.view.ViewRootImpl $ InputStage.onDeliverToNext(ViewRootImpl.java:3473)at android.view.ViewRootImpl $ InputStage.forward (ViewRootImpl.java:3442)在Android.view.inputmethod.InputMethodManager $的android.view.ViewRootImpl $ AsyncInputStage.forward(ViewRootImpl.java:3582)android.view.ViewRootImpl $ ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:3742)位于android.view.inputmethod的android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:1695)的android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:1704)中的PendingEvent.run(InputMethodManager.java:2010) .InputMethodManager $ ImeInputEventSender.onInputEventFinished(InputMethodManager.java:1987)位于android.os.MessageQueue.ne上android.os.MessageQueue.nativePollOnce(Native Method)的android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:141) xt(MessageQueue.java:138)在android.app.Looper.loop(Looper.java:123)的android.app.ActivityThread.main(ActivityThread.java:5019)at java.lang.reflect.Method.invokeNative(Native方法)在java.lang.reflect.Method.invoke(方法 .
2 回答
根据你的错误
您需要在寻呼机适配器中添加此方法
覆盖
destroyItem
方法在你的ViewPagerAdapter
类中删除obj为container.removeView(obj as LinearLayout)
,其中LinearLayout
是你的根布局