Java tutorial
/* * Copyright (C) 2012 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.leo.runningman.ui; import java.io.IOException; import android.annotation.SuppressLint; import android.app.ActionBar; import android.app.WallpaperManager; import android.content.Intent; import android.content.res.Configuration; import android.graphics.Bitmap; import android.graphics.Matrix; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentStatePagerAdapter; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPager.OnPageChangeListener; import android.util.DisplayMetrics; import android.util.Log; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.view.WindowManager.LayoutParams; import android.widget.Toast; import com.google.ads.AdView; import com.leo.runningman.provider.ImageProvider; import com.leo.runningman.util.DiskLruCache; import com.leo.runningman.util.ImageCache; import com.leo.runningman.util.ImageFetcher; import com.leo.runningman.util.ImageResizer; import com.leo.runningman.util.ImageWorker; import com.leo.runningman.util.Utils; public class ImageDetailActivity extends FragmentActivity implements OnClickListener { private static final String TAG = "ImageDetailActivity"; private static final String IMAGE_CACHE_DIR = "images"; public static final String EXTRA_IMAGE = "extra_image"; private ImagePagerAdapter mAdapter; private ImageResizer mImageWorker; public ViewPager mPager; public Object bitmapObject; private AdView adView; private static final String AD_UNITED_ID = "a1515c488146e49"; @SuppressLint("NewApi") @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.image_detail_pager); // Fetch screen height and width, to use as our max size when loading images as this // activity runs full screen final DisplayMetrics displaymetrics = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(displaymetrics); final int height = displaymetrics.heightPixels; final int width = displaymetrics.widthPixels; final int longest = height > width ? height : width; // The ImageWorker takes care of loading images into our ImageView children asynchronously mImageWorker = new ImageFetcher(this, longest); mImageWorker.setAdapter(ImageProvider.imageWorkerUrlsAdapter); mImageWorker.setImageCache(ImageCache.findOrCreateCache(this, IMAGE_CACHE_DIR)); mImageWorker.setImageFadeIn(true); // Set up ViewPager and backing adapter mAdapter = new ImagePagerAdapter(getSupportFragmentManager(), mImageWorker.getAdapter().getSize()); mPager = (ViewPager) findViewById(R.id.pager); mPager.setAdapter(mAdapter); mPager.setPageMargin((int) getResources().getDimension(R.dimen.image_detail_pager_margin)); // Set up activity to go full screen getWindow().addFlags(LayoutParams.FLAG_FULLSCREEN); // Enable some additional newer visibility and ActionBar features to create a more immersive // photo viewing experience if (Utils.hasActionBar()) { final ActionBar actionBar = getActionBar(); // Enable "up" navigation on ActionBar icon and hide title text actionBar.setDisplayHomeAsUpEnabled(true); actionBar.setDisplayShowTitleEnabled(false); // Start low profile mode and hide ActionBar mPager.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE); actionBar.hide(); // Hide and show the ActionBar as the visibility changes mPager.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() { @Override public void onSystemUiVisibilityChange(int vis) { if ((vis & View.SYSTEM_UI_FLAG_LOW_PROFILE) != 0) { actionBar.hide(); } else { // actionBar.show(); } } }); } // Set the current item based on the extra passed in to this activity final int extraCurrentItem = getIntent().getIntExtra(EXTRA_IMAGE, -1); if (extraCurrentItem != -1) { mPager.setCurrentItem(extraCurrentItem); } adView = (AdView) findViewById(R.id.ad_view); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { // case android.R.id.home: // // Home or "up" navigation // final Intent intent = new Intent(this, ImageGridActivity.class); // intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); // startActivity(intent); // return true; case R.id.clear_cache: final ImageCache cache = mImageWorker.getImageCache(); if (cache != null) { mImageWorker.getImageCache().clearCaches(); DiskLruCache.clearCache(this, ImageFetcher.HTTP_CACHE_DIR); Toast.makeText(this, R.string.clear_cache_complete, Toast.LENGTH_SHORT).show(); } return true; case R.id.local: Intent intent = new Intent(this, LocalImageActivity.class); startActivity(intent); return true; } return super.onOptionsItemSelected(item); } private void setWapaper(Bitmap bitmap) { try { WallpaperManager wpm = WallpaperManager.getInstance(this); float minH = wpm.getDesiredMinimumHeight(); float minW = wpm.getDesiredMinimumWidth(); Bitmap targetBitmap = getResizedBitmap(bitmap, (int) minH, (int) minW); wpm.setBitmap(targetBitmap); } catch (IOException e) { e.printStackTrace(); } } private Bitmap getResizedBitmap(Bitmap bm, int newHeight, int newWidth) { int width = bm.getWidth(); int height = bm.getHeight(); float scaleWidth = ((float) newWidth) / width; float scaleHeight = ((float) newHeight) / height; // create a matrix for the manipulation Matrix matrix = new Matrix(); // resize the bit map matrix.postScale(scaleWidth, scaleHeight); // recreate the new Bitmap Bitmap resizedBitmap = Bitmap.createBitmap(bm, 0, 0, width, height, matrix, false); return resizedBitmap; } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.main_menu, menu); return true; } /** * Called by the ViewPager child fragments to load images via the one ImageWorker * * @return */ public ImageWorker getImageWorker() { return mImageWorker; } /** * The main adapter that backs the ViewPager. A subclass of FragmentStatePagerAdapter as there * could be a large number of items in the ViewPager and we don't want to retain them all in * memory at once but create/destroy them on the fly. */ private class ImagePagerAdapter extends FragmentStatePagerAdapter { private final int mSize; public ImagePagerAdapter(FragmentManager fm, int size) { super(fm); mSize = size; } @Override public int getCount() { return mSize; } @Override public Fragment getItem(int position) { // bitmapObject = ImageDetailFragment.newInstance(position).selectedImage; return ImageDetailFragment.newInstance(position); } @Override public void destroyItem(ViewGroup container, int position, Object object) { final ImageDetailFragment fragment = (ImageDetailFragment) object; // As the item gets destroyed we try and cancel any existing work. fragment.cancelWork(); super.destroyItem(container, position, object); } } /** * Set on the ImageView in the ViewPager children fragments, to enable/disable low profile mode * when the ImageView is touched. */ @SuppressLint("NewApi") @Override public void onClick(View v) { final int vis = mPager.getSystemUiVisibility(); if ((vis & View.SYSTEM_UI_FLAG_LOW_PROFILE) != 0) { mPager.setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE); } else { mPager.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE); } } @Override protected void onDestroy() { if (adView != null) { adView.destroy(); } super.onDestroy(); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); Log.i(TAG, "onConfigurationChanged--->" + newConfig.orientation); if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) { } else if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) { } } }