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SkeletonWearableApp / src / com.example.android.google.wearable.app /

GridExampleActivity.java

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/*
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 * Copyright (C) 2014 The Android Open Source Project
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *      http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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package com.example.android.google.wearable.app;
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import android.app.Activity;
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import android.app.Fragment;
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import android.app.FragmentManager;
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.Paint;
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import android.graphics.Point;
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import android.graphics.Typeface;
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import android.graphics.Paint.Align;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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import android.os.Bundle;
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import android.support.wearable.view.CardFragment;
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import android.support.wearable.view.FragmentGridPagerAdapter;
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import android.support.wearable.view.GridViewPager;
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import java.util.HashMap;
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import java.util.Map;
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public class GridExampleActivity extends Activity {
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    private static final int NUM_ROWS = 10;
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    private static final int NUM_COLS = 3;
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    MainAdapter mAdapter;
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    GridViewPager mPager;
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    @Override
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    protected void onCreate(Bundle savedInstanceState) {
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        super.onCreate(savedInstanceState);
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        setContentView(R.layout.grid_activity);
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        mPager = (GridViewPager) findViewById(R.id.fragment_container);
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        mAdapter = new MainAdapter(this, getFragmentManager());
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        mPager.setAdapter(mAdapter);
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    }
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    private static class MainAdapter extends FragmentGridPagerAdapter{
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        Map<Point, Drawable> mBackgrounds = new HashMap<Point, Drawable>();
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        private Context mContext;
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        public MainAdapter(Context ctx, FragmentManager fm) {
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            super(fm);
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            mContext = ctx;
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        }
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        @Override
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        public int getRowCount() {
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            return NUM_ROWS;
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        }
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        @Override
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        public int getColumnCount(int rowNum) {
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            return NUM_COLS;
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        }
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        @Override
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        public Fragment getFragment(int rowNum, int colNum) {
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            return MainFragment.newInstance(rowNum, colNum);
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        }
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        @Override
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        public Drawable getBackgroundForPage(int row, int column) {
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            Point pt = new Point(column, row);
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            Drawable drawable = mBackgrounds.get(pt);
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            if (drawable == null) {
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                Bitmap bm = Bitmap.createBitmap(200, 200, Bitmap.Config.ARGB_8888);
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                Canvas c = new Canvas(bm);
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                Paint p = new Paint();
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                // Clear previous image.
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                c.drawRect(0, 0, 200, 200, p);
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                p.setAntiAlias(true);
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                p.setTypeface(Typeface.DEFAULT);
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                p.setTextSize(64);
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                p.setColor(Color.LTGRAY);
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                p.setTextAlign(Align.CENTER);
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                c.drawText(column+ "-" + row, 100, 100, p);
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                drawable = new BitmapDrawable(mContext.getResources(), bm);
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                mBackgrounds.put(pt, drawable);
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            }
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            return drawable;
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        }
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    }
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    public static class MainFragment extends CardFragment {
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        private static MainFragment newInstance(int rowNum, int colNum) {
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            Bundle args = new Bundle();
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            args.putString(CardFragment.KEY_TITLE, "Row:" + rowNum);
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            args.putString(CardFragment.KEY_TEXT, "Col:" + colNum);
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            MainFragment f = new MainFragment();
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            f.setArguments(args);
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            return f;
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        }
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    }
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}
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