我有一個(Sherlock)FragmentActivity和2個選項卡片段。左邊的片段是一個GridView,用於顯示相冊的圖片,右邊的片段由用於查看單個圖片的ViewPager組成。從左側的片段中,您可以滾動瀏覽圖片並選擇一個。將標籤(或劃過)切換到正確的片段將顯示圖片,並且由於它是ViewPager,您可以滑動到上一張或下一張圖片。禁用在FragmentActivity中的標籤之間滑動
這個效果很好,除了FragmentActivity想攔截右滑動並移回左邊的選項卡。我想阻止FragmentActivity在正確選項卡上攔截滑動。如果我不得不禁用標籤之間的滑動操作,它會令人滿意。我只想將滑動專用於當前選項卡,而不是用於在選項卡之間移動。
以下圖片顯示了當前的行爲。右圖顯示了當我向右滑動時發生的情況。正如你所看到的左側標籤開始出現。我只需要滑動即可應用到右側標籤,這樣我就可以在圖像之間滑動,而不會出現左側標籤。
我看到的解決方案,以控制ViewPager內刷卡,但還沒有找到一個解決方案來控制標籤片段之間滑動。
這裏是爲GridView片段和ViewPager片段的XML:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<FrameLayout android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/gridview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnWidth="100dip"
android:gravity="center"
android:horizontalSpacing="4dip"
android:numColumns="auto_fit"
android:stretchMode="columnWidth"
android:verticalSpacing="4dip" />
</FrameLayout>
</LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/pager"
android:layout_width="fill_parent"
android:layout_height="0px"
android:layout_weight="1"/>
</LinearLayout>
這裏ViewPager片段的代碼摘要:
public class FragmentFlash extends SherlockFragment {
private GestureDetector gestureDetector;
View.OnTouchListener gestureListener;
private ViewPager pager = null;
private int pagerPosition;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
pagerPosition = 0;
// Gesture detection
gestureDetector = new GestureDetector(new MyGestureDetector());
gestureListener = new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
return gestureDetector.onTouchEvent(event);
}
};
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.flash, container, false);
pager = (ViewPager) v.findViewById(R.id.pager);
pager.setOnTouchListener(gestureListener);
return v;
}
class MyGestureDetector extends SimpleOnGestureListener {
private static final int SWIPE_MIN_DISTANCE = 10;
private static final int SWIPE_MAX_OFF_PATH = 250;
private static final int SWIPE_THRESHOLD_VELOCITY = 50;
@Override
public boolean onDown(MotionEvent e) {
return true;//false; make onFling work with fragments
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
try {
if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
return false;
else
// right to left swipe
if(distanceX > SWIPE_MIN_DISTANCE) {
if (pagerPosition < imageUrls.length-1)
pager.setCurrentItem(++pagerPosition);
// left to right swipe
} else if (distanceX < -SWIPE_MIN_DISTANCE) {
if (pagerPosition > 0)
pager.setCurrentItem(--pagerPosition);
}
return true;
} catch (Exception e) {
// nothing
}
return false;
}
}
private class ImagePagerAdapter extends PagerAdapter {
private String[] images;
private LayoutInflater inflater;
ImagePagerAdapter(String[] images) {
this.images = images;
inflater = mContext.getLayoutInflater();
}
@Override
public void destroyItem(View container, int position, Object object) {
((ViewPager) container).removeView((View) object);
}
@Override
public void finishUpdate(View container) {
}
@Override
public int getCount() {
return images.length;
}
@Override
public Object instantiateItem(View view, int position) {
final View imageLayout = inflater.inflate(R.layout.item_pager_image, null);
final ImageView imageView = (ImageView) imageLayout.findViewById(R.id.image);
final ProgressBar spinner = (ProgressBar) imageLayout.findViewById(R.id.loading);
byte[] image = ;//get byte array from file at images[position];
if (null != image) {
Bitmap bitmap = BitmapFactory.decodeByteArray(image, 0, image.length);
imageView.setImageBitmap(bitmap);
}
((ViewPager) view).addView(imageLayout, 0);
return imageLayout;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view.equals(object);
}
@Override
public void restoreState(Parcelable state, ClassLoader loader) {
}
@Override
public Parcelable saveState() {
return null;
}
@Override
public void startUpdate(View container) {
}
}
public void pagerPositionSet(int pagerPosition, String[] imageUrls) {
Log.i(Flashum.LOG_TAG, "FragmentFlash pagerPositionSet: " + pagerPosition);
if (pagerPosition >= 0)
this.pagerPosition = pagerPosition;
if (pager != null) {
pager.setAdapter(new ImagePagerAdapter(imageUrls));
pager.setCurrentItem(this.pagerPosition);
}
}
}
這是item_pager_image.xml:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="1dip" >
<ImageView
android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:adjustViewBounds="true"
android:contentDescription="@string/descr_image" />
<ProgressBar
android:id="@+id/loading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:visibility="gone" />
</FrameLayout>
「而不是將CustomViewPager應用到需要應用到FragmentActivity的片段上。我沒有說明你需要將這個應用到片段,我提供的鏈接也沒有。您的答案只是從已提供的鏈接中複製代碼,該鏈接已經完全解釋瞭如何覆蓋onInterceptTouchEvent以禁用滑動。 – Ljdawson