android.widget.GridView#setNumColumns ( )源码实例Demo

/**
 * 创建显示表情的GridView
 */
private GridView createEmotionGridView(List<String> emotionNames, int gvWidth, int padding, int itemWidth, int gvHeight) {
    // 创建GridView
    GridView gv = new GridView(getActivity());
    //设置点击背景透明
    gv.setSelector(android.R.color.transparent);
    //设置7列
    gv.setNumColumns(8);
    gv.setPadding(padding, padding, padding, padding);
    gv.setHorizontalSpacing(padding);
    gv.setVerticalSpacing(padding * 2);
    //设置GridView的宽高
    ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(gvWidth, gvHeight);
    gv.setLayoutParams(params);
    // 给GridView设置表情图片
    EmotionGridViewAdapter adapter = new EmotionGridViewAdapter(getActivity(), emotionNames, itemWidth);
    gv.setAdapter(adapter);
    //设置全局点击事件
    gv.setOnItemClickListener(GlobalOnItemClickManagerUtils.getInstance(getActivity()).getOnItemClickListener());
    return gv;
}
 

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    LayoutInflater layoutInflater = LayoutInflater.from(getActivity());
    View rootView = layoutInflater.inflate(R.layout.dash_dialog_colors, null);

    mColorGrid = (GridView) rootView.findViewById(R.id.color_grid);

    mColorGrid.setNumColumns(mPreference.mNumColumns);

    mColorGrid.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> listView, View view,
                                int position, long itemId) {
            mPreference.setValue(mAdapter.getItem(position));
            selector.onColorSelected(mAdapter.getItem(position));
            dismiss();
        }
    });

    tryBindLists();

    return new AlertDialog.Builder(getActivity())
            .setView(rootView)
            .create();
}
 

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    ViewFlipper mainViewFlipper = view.findViewById(R.id.recent_emoticon_flipper);

    List<Emoticon> emoticonList = getEmoticonsList(getArguments().getInt(ARG_CATEGORY_ID, -1));

    if (emoticonList.isEmpty()) {
        mainViewFlipper.setDisplayedChild(1);
    } else {
        mainViewFlipper.setDisplayedChild(0);

        GridView emoticonGrid = view.findViewById(R.id.emoticon_list_grid);
        emoticonGrid.setNumColumns(getResources().getInteger(R.integer.emoticon_recycler_view_span_size));
        emoticonGrid.setOnItemClickListener(this);

        //Bind the adapter
        //noinspection WrongConstant
        EmoticonGridAdapter emoticonGridAdapter = new EmoticonGridAdapter(getActivity(),
                mEmoticonProvider, emoticonList);
        emoticonGrid.setAdapter(emoticonGridAdapter);
    }
}
 

/**
 * Sets up the progress dialog, and either restores previously retrieved
 * styles (eg if the screen orientation changes), or loads some styles if
 * the app is first starting.
 */
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mGridView = (GridView) findViewById(R.id.grid);
    // Dynamically set the number of GridView columns, based on orientation.
    int cols = (int) ((float) getWindowManager().getDefaultDisplay().getWidth() / (float) 500);
    mGridView.setNumColumns(cols);

    mProgress = new ProgressDialog(this);
    mProgress.setMessage(getString(R.string.loading));

    if (savedInstanceState != null) {
        mStylesJson = savedInstanceState.getString(STYLES_JSON);
        populateGrid();
    } else {
        onQueryTextSubmit(getString(R.string.default_search));
    }
}
 

private void initWeekGridView(Context context) {
    String[] from = new String[]{"week"};
    int[] to = new int[]{R.id.tvWeekDay};
    String[] strings = new String[]{
            "日", "一", "二", "三", "四", "五", "六"
    };
    List<Map<String, String>> weeks = new ArrayList<>();
    for (String string : strings) {
        Map<String, String> map = new HashMap<>();
        map.put(from[0], string);
        weeks.add(map);
    }
    ListAdapter adapter = new SimpleAdapter(context, weeks, R.layout.layout_week_view, from, to);
    GridView weekView = findViewById(R.id.weekView);
    weekView.setNumColumns(adapter.getCount());
    weekView.setAdapter(adapter);
    weekView.setSelector(new ColorDrawable(Color.TRANSPARENT));
}
 

private GridView getViewPagerItem(final int index) {
    GridView gridView = new GridView(_context);
    gridView.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,
            LayoutParams.WRAP_CONTENT));
    gridView.setNumColumns(4);
    gridView.setVerticalScrollBarEnabled(false);
    gridView.setHorizontalScrollBarEnabled(false);
    gridView.setPadding(8, 8, 8, 0);
    gridView.setVerticalSpacing(20);
    gridView.setSelector(new ColorDrawable(Color.TRANSPARENT));

    gridView.setAdapter(new YayaEmoGridViewAdapter(_context,
            getGridViewData(index)));
    gridView.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                int position, long id) {
            int start = index * SysConstant.yayaPageSize;
            onEmoGridViewItemClick.onItemClick(position + start, index);
        }
    });
    return gridView;
}
 

@Override
protected View createQuizContentView() {
    mAnswerView = new GridView(getContext());
    mAnswerView.setSelector(R.drawable.selector_button);
    mAnswerView.setNumColumns(2);
    mAnswerView.setAdapter(new OptionsQuizAdapter(getQuiz().getOptions(),
            R.layout.item_answer));
    mAnswerView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            allowAnswer();
            mAnswered = position;
        }
    });
    return mAnswerView;
}
 

protected static GridView createShareGridView(final Context context, AdapterView.OnItemClickListener onItemClickListener) {
    GridView grid = new GridView(context);
    ListAdapter adapter = new ArrayAdapter<ShareTarget>(context, 0, shareTargets) {
        // no need scroll
        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.bili_socialize_shareboard_item, parent, false);
            view.setBackgroundDrawable(null);
            ImageView image = (ImageView) view.findViewById(R.id.bili_socialize_shareboard_image);
            TextView platform = (TextView) view.findViewById(R.id.bili_socialize_shareboard_pltform_name);

            ShareTarget target = getItem(position);
            image.setImageResource(target.iconId);
            platform.setText(target.titleId);
            return view;
        }
    };
    grid.setNumColumns(-1);
    grid.setStretchMode(GridView.STRETCH_COLUMN_WIDTH);
    grid.setColumnWidth(context.getResources().getDimensionPixelSize(R.dimen.bili_socialize_shareboard_size));
    grid.setLayoutParams(new ViewGroup.LayoutParams(-1, -2));
    grid.setSelector(R.drawable.bili_socialize_selector_item_background);
    grid.setAdapter(adapter);
    grid.setOnItemClickListener(onItemClickListener);
    return grid;
}
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    GridView gridView = new GridView(this);
    gridView.setNumColumns(2);
    setContentView(gridView);
    DisplayMetrics dm = getResources().getDisplayMetrics();
    size = dm.widthPixels >> 1;
    gridView.setAdapter(new MyAdapter(initData()));
}
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_fangshi);
    recyclerView = (RecyclerView) findViewById(R.id.rv);
    LinearLayoutManager manager = new LinearLayoutManager(this);
    manager.setOrientation(LinearLayoutManager.VERTICAL);
    recyclerView.setHasFixedSize(true);
    recyclerView.setLayoutManager(manager);
    GridLayoutManager manager1 = new GridLayoutManager(this, 3);
    GridView gridView = new GridView(this);
    gridView.setNumColumns(3);

    recyclerView.setItemAnimator(new DefaultItemAnimator());
    adapter = new FangshiAdapter();
    recyclerView.setAdapter(adapter);
    //初始化一个TouchHelperCallback
    TouchHelperCallback callback = new TouchHelperCallback();
    //添加一个回调
    callback.setItemTouchCallBack(adapter);
    //初始化一个ItemTouchHelper
    ItemTouchHelper itemTouchHelper = new ItemTouchHelper(callback);
    //关联相关的RecycleView
    itemTouchHelper.attachToRecyclerView(recyclerView);

    initData();

}
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_colorful_grid);


    GridView gridView = (GridView) findViewById(R.id.gridView);
    gridView.setAdapter(new ColorfulGridAdapter());

    Drawable drawable = getResources().getDrawable(R.drawable.ic_action_sun);
    int numThatFit = (int) ((float)getResources().getDisplayMetrics().widthPixels/(float)drawable.getIntrinsicWidth());
    gridView.setNumColumns(numThatFit);
}
 

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
  View view = inflater.inflate(R.layout.fragment_gridview_main, null);

  final int colSize = 3;
  final int columnWidth = getScreenWidth() / colSize;

  GridView gridView = (GridView) view.findViewById(R.id.grid_view);
  gridView.setNumColumns(colSize);
  gridView.setColumnWidth(columnWidth);
  gridView.setAdapter(new GridViewAdapter(getActivity(), platforms, columnWidth));
  return view;
}
 

@Override
public void horizontal_layout(GridView gridView) {
    int spacingH = SystemUtil.dipToPx(10);
    int itemWidth = SystemUtil.dipToPx(45);
    int size = list.size() + 1;
    int allWidth = ((spacingH + itemWidth) * size);
    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
            allWidth, LinearLayout.LayoutParams.FILL_PARENT);
    gridView.setLayoutParams(params);
    gridView.setColumnWidth(itemWidth);
    gridView.setHorizontalSpacing(spacingH);
    gridView.setStretchMode(GridView.NO_STRETCH);
    gridView.setNumColumns(size);
}
 

private void init() {
    String[] colors = mContext.getResources().getStringArray(R.array.color_list);
    for (int i = 0; i < colors.length; i++) {
        if (colorDatas == null) {
            colorDatas = new String[colors.length][2];
        }
        colorDatas[i][0] = colors[i].split(",")[0];
        colorDatas[i][1] = colors[i].split(",")[1];
    }

    gridView = new GridView(mContext);
    gridView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
    gridView.setBackgroundColor(ContextCompat.getColor(mContext, R.color.white));
    gridView.setNumColumns(8);
    gridView.setPadding(DimenUtils.dip2px(mContext, 8), DimenUtils.dip2px(mContext, 12), DimenUtils.dip2px(mContext, 8), DimenUtils.dip2px(mContext, 12));
    gridView.setGravity(Gravity.CENTER);
    gridView.setHorizontalSpacing(DimenUtils.dip2px(mContext, 4));
    gridView.setVerticalSpacing(DimenUtils.dip2px(mContext, 12));
    gridView.setOnItemClickListener(this);

    setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
    setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
    setBackgroundDrawable(ContextCompat.getDrawable(mContext, R.drawable.rec_solid_primary_bg));
    setFocusable(true);
    setContentView(gridView);

    adapter = new MyAdapter();
    gridView.setAdapter(adapter);
}
 

private View getLinkView(int position, View convertView) {
    if (convertView == null) {
        convertView = View.inflate(context, R.layout.item_home_link, null);
    }

    GridView gridView = ViewHolder.get(convertView, R.id.gridView);

    gridView.setNumColumns(3);
    gridView.setColumnWidth(screenWidth / 3);

    gridView.setAdapter(new LinkAdapter(context, (ArrayList<HomeConfigItem>) getItem(position)));

    return convertView;
}
 

private View getLinkView(int position, View convertView) {
    if (convertView == null) {
        convertView = View.inflate(context, R.layout.item_home_link, null);
    }

    GridView gridView = ViewHolder.get(convertView, R.id.gridView);

    gridView.setNumColumns(3);
    gridView.setColumnWidth(screenWidth / 3);

    gridView.setAdapter(new LinkAdapter(context, homeConfigJson.getVariables().getMyHome().getFunc().getLink()));

    return convertView;
}
 

private void init() {
    setOrientation(LinearLayout.VERTICAL);
    for (int i = 0; i < Emoji.data.length; i++) {
        GridView gridView = new GridView(getContext());
        gridView.setColumnWidth(OSUtilities.dpf(45.0f));
        gridView.setNumColumns(-1);
        views.add(gridView);

        EmojiGridAdapter localEmojiGridAdapter = new EmojiGridAdapter(Emoji.data[i]);
        gridView.setAdapter(localEmojiGridAdapter);
        adapters.add(localEmojiGridAdapter);
    }

    setBackgroundDrawable(new GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM, new int[]{-14145496, -16777216}));
    pager = new ViewPager(getContext());
    pager.setAdapter(new EmojiPagesAdapter());
    PagerSlidingTabStripEmoji tabs = new PagerSlidingTabStripEmoji(getContext());
    tabs.setViewPager(pager);
    tabs.setShouldExpand(true);
    tabs.setIndicatorColor(0xff33b5e5);
    tabs.setIndicatorHeight(OSUtilities.dpf(2.0f));
    tabs.setUnderlineHeight(OSUtilities.dpf(2.0f));
    tabs.setUnderlineColor(1711276032);
    tabs.setTabBackground(0);
    LinearLayout localLinearLayout = new LinearLayout(getContext());
    localLinearLayout.setOrientation(LinearLayout.HORIZONTAL);
    localLinearLayout.addView(tabs, new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1.0f));
    ImageView localImageView = new ImageView(getContext());
    localImageView.setImageResource(R.drawable.ic_emoji_backspace);
    localImageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
    localImageView.setBackgroundResource(R.drawable.bg_emoji_bs);
    localImageView.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {
            if (EmojiView.this.listener != null) {
                EmojiView.this.listener.onBackspace();
            }
        }
    });
    localLinearLayout.addView(localImageView, new LinearLayout.LayoutParams(OSUtilities.dpf(61.0f), LayoutParams.MATCH_PARENT));
    recentsWrap = new FrameLayout(getContext());
    recentsWrap.addView(views.get(0));
    TextView localTextView = new TextView(getContext());
    localTextView.setText(LocaleController.getString("NoRecent", R.string.NoRecent));
    localTextView.setTextSize(18.0f);
    localTextView.setTextColor(-7829368);
    localTextView.setGravity(17);
    recentsWrap.addView(localTextView);
    views.get(0).setEmptyView(localTextView);
    addView(localLinearLayout, new LinearLayout.LayoutParams(-1, OSUtilities.dpf(48.0f)));
    addView(pager);
    loadRecents();
    if (Emoji.data[0] == null || Emoji.data[0].length == 0) {
        pager.setCurrentItem(1);
    }
}
 

private void setupUI(boolean isOrientationChange) {
    if (this.getString(R.string.panes).equals("two") && !mNoDetailMode) {
        if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
            setupLandscapeDualPaneView();
        } else {
            setContentView(R.layout.entity_select_layout);
            restoreExistingSelection(isOrientationChange);
        }
    } else {
        setContentView(R.layout.entity_select_layout);
    }

    AdapterView visibleView;
    GridView gridView = this.findViewById(R.id.screen_entity_select_grid);
    ListView listView = this.findViewById(R.id.screen_entity_select_list);
    if (shortSelect.shouldBeLaidOutInGrid()) {
        visibleView = gridView;
        gridView.setVisibility(View.VISIBLE);
        gridView.setNumColumns(shortSelect.getNumEntitiesToDisplayPerRow());
        listView.setVisibility(View.GONE);
    } else {
        visibleView = listView;
        listView.setVisibility(View.VISIBLE);
        gridView.setVisibility(View.GONE);
        EntitySelectViewSetup.setupDivider(this, listView, shortSelect.usesEntityTileView());
    }
    RxAdapterView.itemClickEvents(visibleView)
            .subscribeOn(AndroidSchedulers.mainThread())
            .throttleFirst(CLICK_DEBOUNCE_TIME, TimeUnit.MILLISECONDS)
            .subscribe((Consumer<AdapterViewItemClickEvent>)clickEvent ->
                    onEntitySelected(clickEvent.position()));

    header = findViewById(R.id.entity_select_header);
    entitySelectSearchUI = new EntitySelectSearchUI(this);
    restoreLastQueryString();
    persistAdapterState(visibleView);
    setUpCalloutClickListener();
    entitySelectSearchUI.setupPreHoneycombFooter(barcodeScanOnClickListener, this.customCallout);
    setupMapNav();
    AdMobManager.requestBannerAdForView(this, findViewById(R.id.ad_container),
            AdLocation.EntitySelect);
}
 

/**
 * {@inheritDoc}
 */
@Override
protected View createView(Context c) {
    imageGrid = new GridView(c);
    Log.i(TAG, "Looking up for encounter: " + getProcedure().getInstanceUri());
    String procedureId =
            getProcedure().getInstanceUri().getLastPathSegment();
    Log.w(TAG, "PictureELement: Encounter id " + procedureId);
    String whereStr;
    if (!UUIDUtil.isValid(procedureId))
        whereStr = ImageSQLFormat.ENCOUNTER_ID + " = ? AND "
                + ImageSQLFormat.ELEMENT_ID + " = ? AND "
                + ImageSQLFormat.FILE_VALID + " = ?";
    else
        whereStr = ImageSQLFormat.ENCOUNTER_ID + " = '?' AND "
                + ImageSQLFormat.ELEMENT_ID + " = ? AND "
                + ImageSQLFormat.FILE_VALID + " = ?";

    Cursor cursor = c.getContentResolver().query(
            SanaDB.ImageSQLFormat.CONTENT_URI,
            new String[]{ImageSQLFormat._ID}, whereStr,
            new String[]{procedureId, id, "1"}, null);

    // HAXMODE -- if we don't do this we leak the Cursor
    if (c instanceof Activity) {
        ((Activity) c).startManagingCursor(cursor);
    }
    imageAdapter = new ScalingImageAdapter(c, cursor,
            THUMBNAIL_SCALE_FACTOR);
    imageGrid.setAdapter(imageAdapter);
    imageGrid.setNumColumns(3);
    imageGrid.setVerticalSpacing(5);
    imageGrid.setPadding(5, 0, 0, 0);

    imageGrid.setOnItemClickListener(this);
    imageGrid.setOnItemLongClickListener(this);

    //imageGrid.setTranscriptMode(imageGrid.TRANSCRIPT_MODE_ALWAYS_SCROLL);

    cameraButton = new Button(c);
    cameraButton.setText(R.string.btn_add_photo);
    cameraButton.setOnClickListener(this);

    imageReview = new ImagePreviewDialog(c);
    LinearLayout picContainer = new LinearLayout(c);
    picContainer.setOrientation(LinearLayout.VERTICAL);

    if (question == null) {
        question = c.getString(R.string.question_standard_picture_element);
    }

    //Set question
    TextView tv = new TextView(c);
    tv.setText(String.format("%s: %s", id, question));
    tv.setGravity(Gravity.CENTER);
    tv.setTextAppearance(c, android.R.style.TextAppearance_Medium);

    //Add to layout
    picContainer.addView(tv, new LinearLayout.LayoutParams(-1, -1, 0.1f));
    //picContainer.addView(imageView, new LinearLayout.LayoutParams(-1,-1,0.1f));

    //Add button
    picContainer.addView(cameraButton,
            new LinearLayout.LayoutParams(-1, -1, 0.1f));
    picContainer.addView(imageGrid,
            new LinearLayout.LayoutParams(-1, 210)); //LayoutParams(-1,-1,0.8f));
    picContainer.setWeightSum(1.0f);
    return picContainer;
}
 

@Override
  public View onCreateView(final LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
  {
      super.onCreateView(inflater, container, savedInstanceState);

/*
       * TODO: build the layout programmatically to get rid of the resources, so we can distribute this in a single jar
 */
      final ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.dmfs_colorpickerdialog_palette_grid, container, false);
      final GridView gridview = (GridView) rootView.findViewById(android.R.id.content);

      mAdapter = new PaletteGridAdapter(getActivity(), mPalette);
      gridview.setAdapter(mAdapter);
      gridview.setOnItemClickListener(this);
      gridview.setNumColumns(mAdapter.getNumColumns());

/*
       * Adjust the layout of the gridview to a square.
 *
 * Inspired by Bill Lahti, see http://blahti.wordpress.com/2012/07/23/three-variations-of-image-squares/
 */
      gridview.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener()
      {
          @SuppressLint("NewApi")
          public void onGlobalLayout()
          {
              int parentHeight = rootView.getHeight() - rootView.getPaddingTop() - rootView.getPaddingBottom();
              int parentWidth = rootView.getWidth() - rootView.getPaddingLeft() - rootView.getPaddingRight();

              int gridWidth = Math.min(parentWidth, parentHeight);

              int columnSpacing;
              if (android.os.Build.VERSION.SDK_INT >= 16)
              {
                  columnSpacing = gridview.getHorizontalSpacing() * (mAdapter.getNumColumns() - 1);
              }
              else
              {
                  /*
                   * TODO: getHorizontalSpacing() has been introduced in SDK level 16. We need to find a way to get get the actual spacing. Until then we use
			 * a hard coded value of 8 dip.
			 *
			 * One way would be to use a dimension in the layout. That would allow us to resolve the dimension here. However, that would be one step
			 * away from a library without resource dependencies. Maybe there is an Android dimension resource with a reasonable value?
			 */
                  DisplayMetrics metrics = inflater.getContext().getResources().getDisplayMetrics();
                  columnSpacing = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 8, metrics) * (mAdapter.getNumColumns() - 1);
              }

              // width of a single column
              int columnWidth = (gridWidth - columnSpacing) / mAdapter.getNumColumns();

              // estimated width of the grid
              int actualGridWidth = mAdapter.getNumColumns() * columnWidth + columnSpacing;

              // add padding to center the grid if we don't use the entire space due to rounding errors
              if (actualGridWidth < gridWidth - 1)
              {
                  int padding = (gridWidth - actualGridWidth) / 2;
                  if (padding > 0)
                  {
                      gridview.setPadding(padding, padding, padding, padding);

                  }
              }
              else
              {
                  // no padding needed
                  gridview.setPadding(0, 0, 0, 0);
              }

              // set the column width
              gridview.setColumnWidth(columnWidth);

              android.view.ViewGroup.LayoutParams params = gridview.getLayoutParams();
              if (params == null || params.height != gridWidth) // avoid unnecessary updates
              {
                  LayoutParams lparams = new LinearLayout.LayoutParams(gridWidth, gridWidth);
                  gridview.setLayoutParams(lparams);
              }
          }
      });
      return rootView;
  }