Java tutorial
/* * Copyright (C) 2017 Angel Garcia * * 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.xengar.android.booksearch.ui; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.text.TextUtils; import android.view.Menu; import android.view.MenuItem; import android.widget.ImageView; import android.widget.TextView; import com.loopj.android.http.JsonHttpResponseHandler; import com.squareup.picasso.Picasso; import com.xengar.android.booksearch.R; import com.xengar.android.booksearch.data.Book; import com.xengar.android.booksearch.sync.BookClient; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import cz.msebera.android.httpclient.Header; /** * Details of a book. */ public class BookDetailActivity extends AppCompatActivity { private ImageView ivBookCover; private TextView tvTitle; private TextView tvAuthor; private TextView tvPublisher; private TextView tvPageCount; private BookClient client; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_book_detail); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); getSupportActionBar().setDisplayHomeAsUpEnabled(true); /* FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); fab.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG) .setAction("Action", null).show(); } }); */ // Fetch views ivBookCover = (ImageView) findViewById(R.id.ivBookCover); tvTitle = (TextView) findViewById(R.id.tvTitle); tvAuthor = (TextView) findViewById(R.id.tvAuthor); tvPublisher = (TextView) findViewById(R.id.tvPublisher); tvPageCount = (TextView) findViewById(R.id.tvPageCount); // Use the book to populate the data into our views Book book = (Book) getIntent().getSerializableExtra(BookListActivity.BOOK_DETAIL_KEY); loadBook(book); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_book_detail, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_share) { setShareIntent(); return true; } return super.onOptionsItemSelected(item); } // Populate data for the book private void loadBook(Book book) { //change activity title this.setTitle(book.getTitle()); // Populate data Picasso.with(this).load(Uri.parse(book.getLargeCoverUrl())).error(R.drawable.ic_nocover).into(ivBookCover); tvTitle.setText(book.getTitle()); tvAuthor.setText(book.getAuthor()); // fetch extra book data from books API client = new BookClient(); client.getExtraBookDetails(book.getOpenLibraryId(), new JsonHttpResponseHandler() { @Override public void onSuccess(int statusCode, Header[] headers, JSONObject response) { try { if (response.has("publishers")) { // display comma separated list of publishers final JSONArray publisher = response.getJSONArray("publishers"); final int numPublishers = publisher.length(); final String[] publishers = new String[numPublishers]; for (int i = 0; i < numPublishers; ++i) { publishers[i] = publisher.getString(i); } tvPublisher.setText(TextUtils.join(", ", publishers)); } if (response.has("number_of_pages")) { tvPageCount.setText(Integer.toString(response.getInt("number_of_pages")) + " pages"); } } catch (JSONException e) { e.printStackTrace(); } } }); } private void setShareIntent() { ImageView ivImage = (ImageView) findViewById(R.id.ivBookCover); final TextView tvTitle = (TextView) findViewById(R.id.tvTitle); // Get access to the URI for the bitmap Uri bmpUri = getLocalBitmapUri(ivImage); // Construct a ShareIntent with link to image Intent shareIntent = new Intent(); // Construct a ShareIntent with link to image shareIntent.setAction(Intent.ACTION_SEND); shareIntent.setType("*/*"); shareIntent.putExtra(Intent.EXTRA_TEXT, (String) tvTitle.getText()); shareIntent.putExtra(Intent.EXTRA_STREAM, bmpUri); // Launch share menu startActivity(Intent.createChooser(shareIntent, "Share Image")); } // Returns the URI path to the Bitmap displayed in cover imageview public Uri getLocalBitmapUri(ImageView imageView) { // Extract Bitmap from ImageView drawable Drawable drawable = imageView.getDrawable(); Bitmap bmp = null; if (drawable instanceof BitmapDrawable) { bmp = ((BitmapDrawable) imageView.getDrawable()).getBitmap(); } else { return null; } // Store image to default external storage directory Uri bmpUri = null; try { File file = new File(getExternalFilesDir(Environment.DIRECTORY_PICTURES), "share_image_" + System.currentTimeMillis() + ".png"); file.getParentFile().mkdirs(); FileOutputStream out = new FileOutputStream(file); bmp.compress(Bitmap.CompressFormat.PNG, 90, out); out.close(); bmpUri = Uri.fromFile(file); } catch (IOException e) { e.printStackTrace(); } return bmpUri; } }