所以，基本上我有一个按钮，当按下它时，它会从它的布局中删除它自己并添加一个带有 ~20 个片段的 ViewPager。
它可以在运行 4.0.4 的三星 Galaxy S II 和运行 4.2.2 的 LG Nexus 4 上正常工作。但是，在运行 2.3.5 的 HTC Desire 或运行 2.3.3 的三星 Galaxy Ace 上尝试时，它会因此异常而崩溃。
FATAL EXCEPTION: main
java.lang.ClassCastException: android.widget.ImageView
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:901)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:461)
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1011)
at android.support.v4.view.ViewPager.populate(ViewPager.java:880)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1374)
at android.view.View.measure(View.java:8553)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3261)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1017)
at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:701)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:311)
at android.view.View.measure(View.java:8553)
at com.cidaut.blueparking.ui.SlidingDrawer.onMeasure(SlidingDrawer.java:210)
at android.view.View.measure(View.java:8553)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:581)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:365)
at android.view.View.measure(View.java:8553)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3261)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
at android.view.View.measure(View.java:8553)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:531)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:309)
at android.view.View.measure(View.java:8553)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3261)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
at android.view.View.measure(View.java:8553)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3261)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
at android.view.View.measure(View.java:8553)
at android.view.ViewRoot.performTraversals(ViewRoot.java:915)
at android.view.ViewRoot.handleMessage(ViewRoot.java:1991)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:150)
at android.app.ActivityThread.main(ActivityThread.java:4385)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:607)
at dalvik.system.NativeStart.main(Native Method)
这不是最具说明性的例外，因为它没有说明问题所在。我什至在整个项目中都没有任何 ImageViews。我不知道怎么了。
这是初始化视图的代码：
private void initCajon() {
firstLayout = View.inflate(this, R.layout.drawer_item_first, null);
secondLayout = new ViewPager(this);
// Stupid hack. Bug de Android, sin esta línea no funciona.
secondLayout.setId(R.id.abs__home);
thirdLayout = View.inflate(this, R.layout.drawer_item_third, null);
bFinalizar = thirdLayout.findViewById(R.id.button1);
bSaldo = thirdLayout.findViewById(R.id.button2);
textViewSegundos = (TextView) thirdLayout
.findViewById(R.id.textViewSegundos);
textViewMinutos = (TextView) thirdLayout
.findViewById(R.id.textViewMinutos);
textViewHoras = (TextView) thirdLayout.findViewById(R.id.textViewHoras);
textViewSaldo = (TextView) thirdLayout.findViewById(R.id.textViewSaldo);
firstLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(final View v) {
if (LoginScreen.isLogged()) {
l = map.getMap().getMyLocation();
if (l != null) {
initDataPrimerClick();
} else {
showToast("La localización aun se está estableciendo. Intentalo dentro de unos segundos.");
}
} else {
new LoginScreen_.IntentBuilder_(MapScreen.this).start();
}
}
});
bFinalizar.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(final View v) {
showDialog("Finalizando aparcamiento...");
stop();
}
});
bSaldo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(final View v) {
SaldoScreen_.intent(MapScreen.this).start();
}
});
slidingDrawer.setOnDrawerOpenListener(new OnDrawerOpenListener() {
@Override
public void onDrawerOpened() {
textViewTime.setVisibility(View.GONE);
}
});
slidingDrawer.setOnDrawerCloseListener(new OnDrawerCloseListener() {
@Override
public void onDrawerClosed() {
if (thirdShown) {
textViewTime.setVisibility(View.VISIBLE);
} else {
textViewTime.setVisibility(View.GONE);
}
}
});
content.removeAllViews();
content.addView(firstLayout);
firstLayout.getLayoutParams().width = LayoutParams.MATCH_PARENT;
textViewTime.setVisibility(View.GONE);
}
这是执行布局切换的代码：
protected void initViewsPrimerClick(final LatLng posicionReal,
final int index, final FragmentAdapter startParkingAdapter) {
final OnPageChangeListener listener = new OnPageChangeListener() {
@Override
public void onPageSelected(final int arg0) {
final StartParkingFragment fragment = (StartParkingFragment) startParkingAdapter
.getItem(arg0);
final Tramo tr = fragment.getTramo();
final LatLng pos = MapMatch.getPuntoProyectadoEnTramo(
posicionReal, tr);
getSupportActionBar().setTitle(calleTramo.get(tr.getId()));
pintaMarkerProyectado(pos);
}
@Override
public void onPageScrolled(final int arg0, final float arg1,
final int arg2) {
}
@Override
public void onPageScrollStateChanged(final int arg0) {
}
};
secondLayout.setOnPageChangeListener(listener);
secondLayout.setAdapter(startParkingAdapter);
secondLayout.setCurrentItem(index);
listener.onPageSelected(index);
thirdShown = false;
content.removeAllViews();
content.addView(secondLayout);
}
我不知道我的代码有什么问题，所以任何见解都会非常好。
以防万一：这些IntentBuilder_对象是由 AndroidAnnotations 自动创建的，并且可以正常工作。