Question

我使用ViewPager创建了一个幻灯片，它运行正常，但它有时会崩溃我的应用程序。只有3个图片加载到其中，我使用一个Timer使其自动滚动，onPause我取消了计时器。

我真的不明白为什么它会不时崩溃，这可能是一些内存问题？图像非常小，我怎么能解决这个问题？

CustomPagerAdapter：

public class CustomPagerAdapter extends PagerAdapter {

    Context mContext;
    LayoutInflater mLayoutInflater;
    int[] mResources;
    private ImageView imageView;

    public CustomPagerAdapter(Context context, int[] mResources) {
        mContext = context;
        mLayoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        this.mResources = mResources;
    }


    @Override
    public int getCount() {
        return mResources.length;
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view == ((LinearLayout) object);
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        View itemView = mLayoutInflater.inflate(R.layout.pager_item, container, false);

        imageView = (ImageView) itemView.findViewById(R.id.imageView);


        try {
            imageView.setImageResource(mResources[position]);          
            container.addView(itemView);
        } catch (Exception e) {
        }



        return itemView;
    }



    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView((LinearLayout) object);
    }
}

主要活动：

private CustomPagerAdapter mCustomPagerAdapter;
    private ViewPager mViewPager;
    private Timer swipeTimer;
    protected int currentPage;

    int[] mResources = { 
            R.drawable.homeslide1, 
            R.drawable.homeslide3,
            R.drawable.homeslide2
            };

    private Editor editor;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {        
            View v = inflater.inflate(R.layout.home, container, false);

            editor = getActivity().getSharedPreferences("orderStatus", Context.MODE_PRIVATE).edit();            

            mCustomPagerAdapter = new CustomPagerAdapter(getActivity(), mResources);
            mViewPager = (ViewPager) v.findViewById(R.id.imageSliderHome);
            mViewPager.setAdapter(mCustomPagerAdapter);
            mViewPager.beginFakeDrag();         

    }
 }

@Override
    public void onResume() { 
        super.onResume();

        swipeTimer = new Timer();
        swipeTimer.schedule(new TimerTask() {

            @Override
            public void run() {
                getActivity().runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        if (currentPage == mCustomPagerAdapter.getCount()) {
                            currentPage = 0;
                        }
                        mViewPager.setCurrentItem(currentPage++, true);
                    }
                });
            }
        }, 1000, 5000);
    }



    public void onPause() {
        super.onPause();
        swipeTimer.cancel();
    }

pager_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:adjustViewBounds="true"
        android:scaleType="centerCrop"
        android:src="@drawable/splash_bg1" />

</LinearLayout>

logcat的：

android.view.InflateException：二进制XML文件行＃7：错误膨胀班 android.view.LayoutInflater.createView（LayoutInflater.java:626）at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView（PhoneLayoutInflater.java:56）在android.view.LayoutInflater.onCreateView（LayoutInflater.java:675）在 android.view.LayoutInflater.createViewFromTag（LayoutInflater.java:700）在android.view.LayoutInflater.rInflate（LayoutInflater.java:761）at android.view.LayoutInflater.inflate（LayoutInflater.java:498）at android.view.LayoutInflater.inflate（LayoutInflater.java:398）at foto.studio.CustomPagerAdapter.instantiateItem（CustomPagerAdapter.java:38）在android.support.v4.view.ViewPager.addNewItem（ViewPager.java:837）at android.support.v4.view.ViewPager.populate（ViewPager.java:1053）at android.support.v4.view.ViewPager.setCurrentItemInternal（ViewPager.java:555）在 android.support.v4.view.ViewPager.setCurrentItemInternal（ViewPager.java:514）在 android.support.v4.view.ViewPager.setCurrentItem（ViewPager.java:506）在foto.studio.HomeActivity $ 7 $ 1.run（HomeActivity.java:146）at android.os.Handler.handleCallback（Handler.java:733）at android.os.Handler.dispatchMessage（Handler.java:95）at android.os.Looper.loop（Looper.java:146）at android.app.ActivityThread.main（ActivityThread.java:5602）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:1283）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1099）at dalvik.system.NativeStart.main（Native方法）引起： 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:600）... 22 更多引起：java.lang.OutOfMemoryError at android.graphics.BitmapFactory.nativeDecodeAsset（Native Method）at android.graphics.BitmapFactory.decodeStream（BitmapFactory.java:683）at at android.graphics.BitmapFactory.decodeResourceStream（BitmapFactory.java:513）在 android.graphics.drawable.Drawable.createFromResourceStream（Drawable.java:889）在android.content.res.Resources.loadDrawable（Resources.java:3436）at android.content.res.TypedArray.getDrawable（TypedArray.java:602）at at android.widget.ImageView。（ImageView.java:133）at android.widget.ImageView。（ImageView.java:123）... 25更多

Answer 1

您可以使用Runnable和Handler来替换Timer。并显示您的logcat 并尝试使用thiss method进行比例位图

Answer 2

正如我所料，你通过加载太大/太多的图像来获得OutOfMemory异常。

引起：java.lang.OutOfMemoryError at android.graphics.BitmapFactory。

要避免这种情况，请阅读this article和this one，并在使用后忘记recycle()张图片。同时将图像放入drawable-nodpi资源目录。

Android ViewPager崩溃：InflateException：二进制XML文件行＃7：错误导致类

2 个答案: