翻译what i have until now is a customized gallery activity in which i inflate layouts instead of images to create a swipable ui quite similar to the android homescreen. In my application this represents a catalogue of descriptions and pictures of artworks the user can browse through by swiping.
Because gallery consumes all touchevents, i made my own subclass of the gallery class to allow scrollviews to function.
Here is the code of the activity where the gallery is initialized:
public class CatalogueActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.catalogue_gallery); //initialize Gallery Widget MyGallery g = (MyGallery) findViewById(R.id.gallery); g.setAdapter(new ImageAdapter(this)); g.setOnItemSelectedListener(new OnItemSelectedListener() { public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) { if(selectedItemView != null){ switch (position){ case 3: //GoToMap Button in DetailView1 Button toMap_btn = (Button) selectedItemView.findViewById(R.id.GoToMap01); toMap_btn.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Intent toCatalogue = new Intent().setClassName("com.uart", "com.uart.uartMain"); toCatalogue.putExtra("tabContent", 71); startActivity(toCatalogue); } }); case 4: //GoToMap Button in DetailView2 Button toMap_btn2 = (Button) selectedItemView.findViewById(R.id.GoToMap02); toMap_btn2.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Intent toCatalogue = new Intent().setClassName("com.uart", "com.uart.uartMain"); toCatalogue.putExtra("tabContent", 72); startActivity(toCatalogue); } }); } } } public void onNothingSelected(AdapterView<?> parentView) { // your code here } }); } public class ImageAdapter extends BaseAdapter { int mGalleryItemBackground; private Context mContext; private Integer[] mLayoutIds = { R.layout.cover, R.layout.catalogue_layout, R.layout.introduction, R.layout.artwork_detail, R.layout.artwork_detail2, R.layout.artwork_detail3, R.layout.artwork_detail4 }; public ImageAdapter(Context c) { mContext = c; TypedArray a = obtainStyledAttributes(R.styleable.HelloGallery); mGalleryItemBackground = a.getResourceId( R.styleable.HelloGallery_android_galleryItemBackground, 0); a.recycle(); } public int getCount() { return mLayoutIds.length; } public Object getItem(int position) { return position; } public long getItemId(int position) { return position; } public View getView(int position, View convertView, ViewGroup parent) { convertView = LayoutInflater.from(mContext).inflate(mLayoutIds[position], null); convertView.setLayoutParams(new Gallery.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT)); convertView.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Intent toCatalogue = new Intent().setClassName("com.uart", "com.uart.uartMain"); toCatalogue.putExtra("tabContent", 72); startActivity(toCatalogue); } }); return convertView; } } }And here is my customized gallery subclass:
public class MyGallery extends Gallery { FriendlyScrollView currScrollView; boolean isSwiping = false; public MyGallery(Context ctx, AttributeSet attrSet) { super(ctx, attrSet); // TODO Auto-generated constructor stub } @Override public boolean onTouchEvent(MotionEvent ev) { return super.onTouchEvent(ev); } @Override public boolean onInterceptTouchEvent(MotionEvent ev) { currScrollView = getCurrScrollView(); return super.onInterceptTouchEvent(ev); } private boolean myGestureDetection(float distanceX){ if(distanceX >= 20 || distanceX <= -20){ Log.i("myGallery", "distanceX = "+distanceX); isSwiping = true; } return isSwiping; } @Override public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { if (myGestureDetection(distanceX) == false){ if(currScrollView != null){ currScrollView.scrollBy(0, (int) distanceY); Log.i("myGallery", "Is scrolling vertical"); } } else{ //Hier: Horizontal Scroll der Gallery Items Log.i("myGallery", "Is scrolling horizontal"); } return super.onScroll(e1, e2, distanceX, distanceY); } @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { Log.i("myGallery", "is Swiping"); isSwiping = false; // Calculate swipe-animation duration depending on gesture velocity float velMax = 2500f; float velMin = 1000f; float velX = Math.abs(velocityX); if (velX > velMax) { velX = velMax; } else if (velX < velMin) { velX = velMin; } velX -= 600; int k = 500000; int speed = (int) Math.floor(1f / velX * k); setAnimationDuration(speed); return true; } private FriendlyScrollView getCurrScrollView() { int pos = getFirstVisiblePosition(); if(pos != getAdapter().getCount()-1) return (FriendlyScrollView)this.getSelectedView(); else return null; } }