我在viewpager实现中夸大了视图（而不是片段）。我的主要课程扩展了Activity。 当我尝试从我的应用程序或
中滑动屏幕时，我遇到此错误 at com.example.app.CustomPagerAdapter.instantiateItem(CustomPagerAdapter.java:47)
和
01-04 16:44:35.5278614-8614/com.parsizabanan.app W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x4195ee48)
01-04 16:44:35.5278614-8614/com.parsizabanan.app E/AndroidRuntime﹕ FatAL EXCEPTION: main
Process: com.parsizabanan.app, PID: 8614
android.view.InflateException: Binary XML file line #6: Error inflating class <unknown>
at android.view.LayoutInflater.createView(LayoutInflater.java:620)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInfl ater.java:56)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:669)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:694)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
at com.parsizabanan.app.CustomPagerAdapter.instantiateItem(CustomPagerAdapter.java:47)
at android.support.v4.view.PagerAdapter.instantiateItem(PagerAdapter.java:110)
at android.support.v4.view.ViewPager.addNewItem(ViewPager.java:837)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1021)
at android.support.v4.view.ViewPager.populate(ViewPager.java:919)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1441)
at android.view.View.measure(View.java:16574)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:719)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:455)
at android.view.View.measure(View.java:16574)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5140)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16574)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5140)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1406)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:697)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:590)
at android.view.View.measure(View.java:16574)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5140)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2421)
at android.view.View.measure(View.java:16574)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1955)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1151)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1333)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1038)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5890)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:544)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5118)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:794)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:610)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at android.view.LayoutInflater.createView(LayoutInflater.java:594)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInfl ater.java:56)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:669)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:694)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
at com.parsizabanan.app.CustomPagerAdapter.instantiateItem(CustomPagerAdapter.java:47)
at android.support.v4.view.PagerAdapter.instantiateItem(PagerAdapter.java:110)
at android.support.v4.view.ViewPager.addNewItem(ViewPager.java:837)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1021)
at android.support.v4.view.ViewPager.populate(ViewPager.java:919)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1441)
at android.view.View.measure(View.java:16574)
at android.widget.RelativeLayout.measureChildHorizontal(Rel ativeLayout.java:719)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:455)
at android.view.View.measure(View.java:16574)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5140)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16574)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5140)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1406)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:697)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:590)
at android.view.View.measure(View.java:16574)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5140)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2421)
at android.view.View.measure(View.java:16574)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1955)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1151)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1333)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1038)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5890)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:544)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5118)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:794)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:610)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.OutOfMemoryError
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:587)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:422)
at android.graphics.drawable.Drawable.cre ateFromResourceStream(Drawable.java:840)
at android.content.res.Resources.loadDrawable(Resources.java:2150)
CustomPagerAdapter：
public class CustomPagerAdapter extends PagerAdapter {
public Object instantiateItem(View collection, int position) {
LayoutInflaterinflater = (LayoutInflater) collection.getContext()
.getSystemService(Context.LAYOUT_INFLatER_SERVICE);
int resId = 0;
switch (position) {
case 0: {
resId = R.layout.lab;
break;
}
case 1: {
resId = R.layout.lab;
break;
}
case 2: {
resId = R.layout.etela;
break;
}
case 3: {
resId = R.layout.ticket;
break;
}
case 4: {
resId = R.layout.product;
break;
}
case 5: {
resId = R.layout.about;
break;
}
}
View view = inflater.inflate(resId, null);
((ViewPager) collection).addView(view, 0);
return view;
}
@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
((ViewPager) arg0).removeView((View) arg2);
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == ((View) arg1);
}
@Override
public Parcelable saveSt ate() {
return null;
}
@Override
public int getCount() {
return 6;
}
MyActivity：
public class MyActivity extends Activity {
ViewPager myPager = null;
ImageButton contact = null;
ImageButton about = null;
ImageButton lab = null;
ImageButton product = null;
ImageButton ticket = null;
ImageButton etela = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
CustomPagerAdapter adapter = new CustomPagerAdapter();
myPager = (ViewPager) findViewById(R.id.customviewpager);
myPager.setAdapter(adapter);
myPager.setCurrentItem(5);
myPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
public void onPageScrolled(int i, flo at v, int i2) {
}
public void onPageSelected(int i) {
}
public void onPageScrollStateChanged(int i) {
Thread t1 = new Thread(new Runnable() {
@Override
public void run() {
switch (myPager.getCurrentItem()) {
case 0:
break;
case 1:
break;
case 2:
break;
case 3:
break;
case 4:
break;
case 5:
break;
}
}
});
t1.start();
}
});
}
是实验室布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/lab1"/>
</LinearLayout>