package jianshu.io.app;
import android.animation.ObjectAnimator;
import android.app.ActionBar;
import android.app.DownloadManager;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.app.NavUtils;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.ShareActionProvider;
import android.widget.TextView;
import android.widget.Toast;
import net.tsz.afinal.FinalHttp;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import jianshu.io.app.dialog.ScanFinishedDialogFragment;
import jianshu.io.app.model.JianshuSession;
import jianshu.io.app.model.StatePool;
import jianshu.io.app.widget.LoadingTextView;
import jianshu.io.app.widget.ObservableWebView;
import me.imid.swipebacklayout.lib.SwipeBackLayout;
import me.imid.swipebacklayout.lib.app.SwipeBackActivity;
public class ArticleActivity extends SwipeBackActivity implements ScanFinishedDialogFragment.OnFragmentInteractionListener, ObservableWebView.OnScrollChangedCallback {
static final String LIKE_SYMBOL = "♥";
static final String UNLIKE_SYMBOL = "♡";
static final Pattern LIKE_COUNT_PATTERN = Pattern.compile("\"([0-9]+)个喜欢\"", Pattern.DOTALL);
private LoadingTextView mLoadingArticle;
private String mUrl;
private String mTitle;
private String mSummary;
private String mAuthor;
private String avatarUrl;
private View mLikeView;
private TextView mLikeTextView;
private boolean isLiking;
private int likingCount = 0;
private String likeUrl;
private ProgressBar mLikeProgress;
private boolean isLikingProgressing;
private ObjectAnimator likingAnim;
private ObjectAnimator unlikingAnim;
private ObjectAnimator currentAnim;
private Handler handler;
private ObservableWebView mWebView;
private Button mRetryButton;
private View scanLight;
private SwipeBackLayout mSwipeBackLayout;
private Animation scanAnim;
private Animation fadeIn;
private Animation fadeOut;
private ScanFinishedDialogFragment scanFinishedDialogFragment;
private String imagePath;
private Uri imageUri;
private FinalHttp mFinalHttp;
private ShareActionProvider mShareActionProvider;
private DownloadManager mDownloadManager;
private Bitmap scanBitmap;
private String content;
private Menu menu;
protected static String Css;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_article);
this.handler = new Handler();
Intent intent = getIntent();
mUrl = intent.getStringExtra("url");
// mTitle = intent.getStringExtra("title");
// mSummary = intent.getStringExtra("summary");
// mAuthor = intent.getStringExtra("author");
mLoadingArticle = (LoadingTextView) findViewById(R.id.loading_article);
mWebView = (ObservableWebView) findViewById(R.id.web);
mWebView.setOnScrollChangedCallback(this);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.addJavascriptInterface(this, "article");
mRetryButton = (Button) findViewById(R.id.retry);
this.scanLight = (View) findViewById(R.id.scan_light);
final ArticleActivity that = this;
this.fadeIn = AnimationUtils.loadAnimation(this, R.anim.fade_in);
this.fadeOut = AnimationUtils.loadAnimation(this, R.anim.fade_out);
this.fadeOut.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
ArticleActivity.this.mLikeView.setVisibility(View.GONE);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
this.scanAnim = AnimationUtils.loadAnimation(this, R.anim.scan);
this.scanAnim.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
that.scanFinishedDialogFragment = ScanFinishedDialogFragment.newInstance();
that.scanFinishedDialogFragment.show(ft, "scan");
}
@Override
public void onAnimationEnd(Animation animation) {
ArticleActivity.this.scanLight.setVisibility(View.GONE);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
mLikeProgress = (ProgressBar) findViewById(R.id.like_progress);
this.likingAnim = ObjectAnimator.ofInt(this.mLikeProgress, "progress", 2, mLikeProgress.getMax() - 1);
this.likingAnim.setDuration(2000);
this.unlikingAnim = ObjectAnimator.ofInt(this.mLikeProgress, "progress", mLikeProgress.getMax() - 1, 2);
this.unlikingAnim.setDuration(2000);
mLikeView = findViewById(R.id.like);
mLikeTextView = (TextView) findViewById(R.id.like_text);
mLikeView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final ArticleActivity that = ArticleActivity.this;
final int max = mLikeProgress.getMax();
if (that.isLikingProgressing) {
return;
}
that.isLikingProgressing = true;
that.currentAnim = that.isLiking ? that.unlikingAnim : that.likingAnim;
that.currentAnim.start();
(new AsyncTask<Void, Void, Boolean>() {
@Override
protected Boolean doInBackground(Void... params) {
Object httpResult = JianshuSession.getsInstance().postSync(that.likeUrl, false);
if (httpResult instanceof String) {
String str = (String) httpResult;
if (str.startsWith("$")) {
if (str.contains("addClass('note-liked')")) {
that.isLiking = true;
} else if (str.contains("removeClass('note-liked')")) {
that.isLiking = false;
}
Matcher matcher = LIKE_COUNT_PATTERN.matcher(str);
if (matcher.find()) {
that.likingCount = Integer.parseInt(matcher.group(1));
}
return true;
}
}
return false;
}
@Override
protected void onPostExecute(Boolean succeed) {
that.isLikingProgressing = false;
//即使是网络问题失败了，也要重置进度条状态
updateLike();
if (!succeed) {
Toast.makeText(that, "网络似乎不给力", Toast.LENGTH_LONG).show();
}
}
}).execute();
}
});
ActionBar actionBar = getActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
//滑动返回
mSwipeBackLayout = getSwipeBackLayout();
mSwipeBackLayout.setEdgeTrackingEnabled(SwipeBackLayout.EDGE_LEFT);
mRetryButton.setOnClickListener(new Button.OnClickListener() {
@Override
public void onClick(View v) {
mRetryButton.setVisibility(View.INVISIBLE);
mLoadingArticle.setVisibility(View.VISIBLE);
loadArticle();
}
});
mDownloadManager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
mFinalHttp = new FinalHttp();
Object[] state = StatePool.getInstance().getState("article");
if(state != null) {
String url = (String)state[0];
if(mUrl.equals(url)) {
this.mTitle = (String)state[1];
this.mAuthor = (String)state[2];
this.content = (String)state[3];
mWebView.setVisibility(View.VISIBLE);
mWebView.loadData(this.content, "text/html; charset=UTF-8", null);
return;
}
}
loadArticle();
}
private void updateLike() {
if (this.currentAnim != null) {
this.currentAnim.end();
}
// if (this.mLikeView.getVisibility() == View.GONE) {
// this.mLikeView.setVisibility(View.VISIBLE);
// }
mLikeProgress.setProgress(isLiking ? mLikeProgress.getMax() : 0);
String text = (isLiking ? LIKE_SYMBOL : UNLIKE_SYMBOL) + " " + this.likingCount;
mLikeTextView.setText(text);
mLikeTextView.setTextColor(getResources().getColor(isLiking ? R.color.white_trans : R.color.jianshu_trans));
}
private void loadArticle() {
final ArticleActivity that = this;
mLoadingArticle.startAnimation();
(new AsyncTask<Void, Void, String>() {
@Override
protected String doInBackground(Void... params) {
Object httpResult = JianshuSession.getsInstance().getSync(mUrl, true);
if (httpResult instanceof String) {
Document doc = Jsoup.parse((String) httpResult);
//您要访问的页面不存在
if(doc.select("body.error").size() > 0) {
return (String)httpResult;
}
parseArticleInfo(doc);
//mImageUrl = doc.select("div.meta-bottom").get(0).attr("data-image");
Element likeBtnEl = doc.select(".like > .btn").get(0);
String likeUrlAttr = likeBtnEl.attr("href");
//判断登录状态
if (!likeUrlAttr.equals("#login-model")) {
that.likeUrl = "http://jianshu.io" + likeBtnEl.attr("href");
that.isLiking = likeBtnEl.hasClass("note-liked");
Elements functionEls = doc.select("div.comment li a");
Element likeCountEl = null;
for (Element el : functionEls) {
if (el.attr("href").equals("#like")) {
likeCountEl = el;
break;
}
}
String countStr = likeCountEl.text().replace("个喜欢", "").trim();
that.likingCount = Integer.parseInt(countStr);
}
Element article = doc.select("div.preview").get(0);
Element title = article.select("h1.title").get(0);
Element authorInfo = article.select("div.meta-top").get(0);
Element content = article.select("div.show-content").get(0);
String extractedDocStr = String.format("<html lang=\"zh-CN\">" +
"<head>" +
"<meta charset=\"utf-8\">" +
"<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">" +
"<style type=\"text/css\">%s</style>" +
"</head>" +
"<body class=\"post output zh cn reader-day-mode reader-font1 win\">" +
"<div class=\"post-bg\">" +
"<div class=\"container\">" +
"<div class=\"article\">" +
"<div class=\"preview\">" +
"%s" + "%s" + "%s" +
"</div>" +
"</div>" +
"</div>" +
"</div>" +
getJianshuBar() +
"</body>" +
"</html>",
getCss(),
title.toString(), authorInfo.toString(), content.toString()
);
StatePool.getInstance().putState("article", new Object[]{mUrl, mTitle, mAuthor, extractedDocStr});
return extractedDocStr;
} else {
return null;
}
}
@Override
protected void onPostExecute(String s) {
mLoadingArticle.endAnimation();
setShareIntent(that.menu);
mLoadingArticle.setVisibility(View.INVISIBLE);
if (s != null) {
that.content = s;
mWebView.setVisibility(View.VISIBLE);
mWebView.loadData(s, "text/html; charset=UTF-8", null);
} else {
mWebView.setVisibility(View.INVISIBLE);
mRetryButton.setVisibility(View.VISIBLE);
}
updateLike();
}
}).execute();
}
private void parseArticleInfo(Document doc) {
mTitle = doc.select("h1.title").get(0).text();
mAuthor = doc.select("div.meta-top span").get(0).text();
}
protected String getCss() {
if (Css == null) {
try {
InputStream stream = getAssets().open("jianshu.css");
int size = stream.available();
byte[] buffer = new byte[size];
stream.read(buffer);
stream.close();
Css = new String(buffer);
} catch (IOException e) {
// Handle exceptions here
}
}
return Css;
}
@Override
protected void onPause() {
super.onPause();
if (mLoadingArticle.getVisibility() == View.VISIBLE) {
mLoadingArticle.endAnimation();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.article, menu);
this.menu = menu;
return true;
}
private void setShareIntent(Menu menu) {
if (menu != null) {
MenuItem item = menu.findItem(R.id.menu_item_share);
Intent shareIntent = new Intent();
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.putExtra(Intent.EXTRA_TITLE, mTitle);
shareIntent.putExtra(Intent.EXTRA_TEXT, getSharedContent());
shareIntent.putExtra(Intent.EXTRA_ORIGINATING_URI, mUrl);
shareIntent.setType("text/plain");
mShareActionProvider = (ShareActionProvider) item.getActionProvider();
if (mShareActionProvider != null) {
mShareActionProvider.setShareIntent(shareIntent);
}
}
}
private String getSharedContent() {
return String.format("《%s》 by %s %s (%s)", mTitle, mAuthor, mUrl, "分享自简书");
}
private String getJianshuBar() {
return "<div class='jianshu_bar'><h1>简书</h1><h3>最好的写作和阅读平台</h3><p><a href='http://jianshu.io'>http://jianshu.io</a></p></div> ";
}
@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();
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
Intent intent = NavUtils.getParentActivityIntent(this);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
overridePendingTransition(0, R.anim.slide_out_right);
return true;
case R.id.menu_item_picture:
mWebView.loadUrl("javascript:document.getElementsByClassName('jianshu_bar')[0].style.display = 'block'");
this.handler.postDelayed(new Runnable() {
@Override
public void run() {
scanContent();
}
}, 1000);
this.scanLight.setVisibility(View.VISIBLE);
this.scanLight.startAnimation(this.scanAnim);
return true;
}
return super.onOptionsItemSelected(item);
}
public void scanContent() {
int[] size = this.mWebView.getRealSize();
int width = size[0];
int height = size[1];
try {
this.scanBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(this.scanBitmap);
this.mWebView.draw(canvas);
} catch (OutOfMemoryError e) {
this.scanBitmap = null;
mWebView.loadUrl("javascript:document.getElementsByClassName('jianshu_bar')[0].style.display = 'none'");
this.scanFinishedDialogFragment.onScanError("篇幅过长，不能扫描");
return;
}
final ArticleActivity that = ArticleActivity.this;
(new AsyncTask<Void, Void, Boolean>() {
@Override
protected Boolean doInBackground(Void... params) {
try {
File jianshuImageFile = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES) + "/jianshu");
if (!jianshuImageFile.exists()) {
jianshuImageFile.mkdirs();
}
that.imagePath = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES) + "/jianshu/" + getImageFileName(mTitle);
FileOutputStream fos = new FileOutputStream(that.imagePath);
that.scanBitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
that.scanBitmap.recycle();
that.scanBitmap = null;
fos.close();
return true;
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return false;
}
@Override
protected void onPostExecute(Boolean succeed) {
mWebView.loadUrl("javascript:document.getElementsByClassName('jianshu_bar')[0].style.display = 'none'");
if (succeed) {
that.imageUri = Uri.fromFile(new File(that.imagePath));
Intent localIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, that.imageUri);
sendBroadcast(localIntent);
that.scanFinishedDialogFragment.onScanFinished();
} else {
that.scanFinishedDialogFragment.onScanError("保存图片时遇到错误");
}
}
}).execute();
}
static final char[] RESERVED_CHARS = new char[]{'|', '\\', '?', '*', '<', '\"', ':', '>', '+', '[', ']', '/', '\''};
private String getImageFileName(String title) {
String imageFileName = title;
for (char ch : RESERVED_CHARS) {
imageFileName = imageFileName.replace(ch, '%');
}
return imageFileName + ".jpeg";
}
@Override
public void onBackPressed() {
finish();
overridePendingTransition(0, R.anim.slide_out_right);
}
@Override
public void onViewButtonPressed() {
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
Fragment f = getSupportFragmentManager().findFragmentByTag("scan");
if (f != null) {
ft.remove(f);
ft.commit();
}
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(this.imageUri, "image/jpeg");
startActivity(intent);
}
@Override
public void onScrollChanged(boolean isAtTheEnd) {
if (isAtTheEnd) {
if (mLikeView.getVisibility() == View.GONE) {
mLikeView.setVisibility(View.VISIBLE);
mLikeView.startAnimation(this.fadeIn);
}
} else {
if (mLikeView.getVisibility() == View.VISIBLE) {
mLikeView.startAnimation(this.fadeOut);
}
}
}
}