Add load pdf from url use okhttp3

README.md

@@ -32,12 +32,23 @@ This is beta release because of big number of small changes and something could
 * removed minimap and mask configuration
 
 ## Installation
+## Step 1. Add the JitPack repository to your build file
+Add it in your root build.gradle at the end of repositories:
+
+	allprojects {
+		repositories {
+			...
+			maven { url 'https://jitpack.io' }
+		}
+	}
+
+## Step 2. Add the dependency
+	dependencies {
+	        compile 'com.github.shxdos:AndroidPdfViewer:2.7.0-beta.2'
+	}
 
-Add to _build.gradle_:
 
-`compile 'com.github.barteksc:android-pdf-viewer:2.7.0-beta.1'` or `2.6.1` for more stable version
 
-Library is available in jcenter repository, probably it'll be in Maven Central soon.
 
 ## Include PDFView in your layout
 
@@ -53,6 +64,16 @@ Library is available in jcenter repository, probably it'll be in Maven Central s
 All available options with default values:
 ``` java
 pdfView.fromUri(Uri)
+or
+  pdfView.fromUrl("http://www.anweitong.com/upload/document/standard/national_standards/138793918364316200.pdf")
+                        .enableSwipe(true) // allows to block changing pages using swipe
+                        .defaultPage(0)
+                        .onLoad(this) // called after document is loaded and starts to be rendered
+                        .onPageChange(this)
+                        .swipeHorizontal(false)
+                        .enableAntialiasing(true)
+                        .onFileDownload(this)
+                        .loadFromUrl();
 or
 pdfView.fromFile(File)
 or

android-pdf-viewer/build.gradle

@@ -39,6 +39,7 @@ android {
 
 dependencies {
     compile 'com.github.barteksc:pdfium-android:1.7.0'
+    compile 'com.squareup.okhttp3:okhttp:3.8.1'
 }
 
 apply from: 'https://raw.githubusercontent.com/nuuneoi/JCenter/master/installv1.gradle'

android-pdf-viewer/src/main/java/com/github/barteksc/pdfviewer/PDFView.java

@@ -28,13 +28,15 @@
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.os.AsyncTask;
+import android.os.Environment;
 import android.os.HandlerThread;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.widget.RelativeLayout;
 
 import com.github.barteksc.pdfviewer.listener.OnDrawListener;
 import com.github.barteksc.pdfviewer.listener.OnErrorListener;
+import com.github.barteksc.pdfviewer.listener.OnFileDownloadCompleteListener;
 import com.github.barteksc.pdfviewer.listener.OnLoadCompleteListener;
 import com.github.barteksc.pdfviewer.listener.OnPageChangeListener;
 import com.github.barteksc.pdfviewer.listener.OnPageScrollListener;
@@ -47,8 +49,10 @@
 import com.github.barteksc.pdfviewer.source.FileSource;
 import com.github.barteksc.pdfviewer.source.InputStreamSource;
 import com.github.barteksc.pdfviewer.source.UriSource;
+import com.github.barteksc.pdfviewer.source.UrlSource;
 import com.github.barteksc.pdfviewer.util.ArrayUtils;
 import com.github.barteksc.pdfviewer.util.Constants;
+import com.github.barteksc.pdfviewer.util.DownloadUtil;
 import com.github.barteksc.pdfviewer.util.MathUtils;
 import com.github.barteksc.pdfviewer.util.Util;
 import com.shockwave.pdfium.PdfDocument;
@@ -1288,7 +1292,14 @@ public Configurator fromAsset(String assetName) {
     public Configurator fromFile(File file) {
         return new Configurator(new FileSource(file));
     }
-
+    /**
+     * Use a url as the pdf source
+     */
+    public Configurator fromUrl(String url) {
+        Configurator source= new Configurator(new UrlSource(url));
+        source.fileUrl(url);
+        return source;
+    }
     /**
      * Use URI as the pdf source, for use with content providers
      */
@@ -1322,7 +1333,7 @@ private enum State {DEFAULT, LOADED, SHOWN, ERROR}
     public class Configurator {
 
         private final DocumentSource documentSource;
-
+        private String fileUrl;
         private int[] pageNumbers = null;
 
         private boolean enableSwipe = true;
@@ -1334,6 +1345,7 @@ public class Configurator {
         private OnDrawListener onDrawAllListener;
 
         private OnLoadCompleteListener onLoadCompleteListener;
+        private OnFileDownloadCompleteListener onFileDownloadCompleteListener;
 
         private OnErrorListener onErrorListener;
 
@@ -1365,6 +1377,10 @@ public Configurator pages(int... pageNumbers) {
             this.pageNumbers = pageNumbers;
             return this;
         }
+        private Configurator fileUrl(String fileUrl){
+            this.fileUrl=fileUrl;
+            return this;
+        }
 
         public Configurator enableSwipe(boolean enableSwipe) {
             this.enableSwipe = enableSwipe;
@@ -1395,7 +1411,10 @@ public Configurator onLoad(OnLoadCompleteListener onLoadCompleteListener) {
             this.onLoadCompleteListener = onLoadCompleteListener;
             return this;
         }
-
+        public Configurator onFileDownload(OnFileDownloadCompleteListener onFileDownloadCompleteListener) {
+            this.onFileDownloadCompleteListener = onFileDownloadCompleteListener;
+            return this;
+        }
         public Configurator onPageScroll(OnPageScrollListener onPageScrollListener) {
             this.onPageScrollListener = onPageScrollListener;
             return this;
@@ -1468,5 +1487,40 @@ public void load() {
                 PDFView.this.load(documentSource, password, onLoadCompleteListener, onErrorListener);
             }
         }
+        public void loadFromUrl(){
+            final String SDPath = Environment.getExternalStorageDirectory().getAbsolutePath()+"/PDFViewCache/";
+            int index = fileUrl.lastIndexOf("/");
+            String fileName = fileUrl.substring(index);
+            final File file = new File(SDPath, fileName);
+            if(file.exists()){
+                //文件存在
+                if(onFileDownloadCompleteListener!=null){
+                    onFileDownloadCompleteListener.onDownloadComplete(file);
+                }
+                PDFView.this.fromFile(file);
+                load();
+            }else{
+                DownloadUtil.get().download(fileUrl, SDPath, new DownloadUtil.OnDownloadListener() {
+                    @Override
+                    public void onDownloadSuccess(File file) {
+                        if(onFileDownloadCompleteListener!=null){
+                            onFileDownloadCompleteListener.onDownloadComplete(file);
+                        }
+                        PDFView.this.fromFile(file);
+                        load();
+                    }
+
+                    @Override
+                    public void onDownloading(int progress) {
+
+                    }
+
+                    @Override
+                    public void onDownloadFailed() {
+
+                    }
+                });
+            }
+        }
     }
 }

android-pdf-viewer/src/main/java/com/github/barteksc/pdfviewer/listener/OnFileDownloadCompleteListener.java

@@ -0,0 +1,31 @@
+/**
+ * Copyright 2016 Bartosz Schiller
+ * <p>
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.github.barteksc.pdfviewer.listener;
+
+import java.io.File;
+
+/**
+ * Implement this interface to receive events from PDFView
+ * when the url file loading is complete.
+ */
+public interface OnFileDownloadCompleteListener {
+
+    /**
+     * Called when the PDF is loaded
+     * @param file the number of pages in this PDF file
+     */
+    void onDownloadComplete(File file);
+}

android-pdf-viewer/src/main/java/com/github/barteksc/pdfviewer/source/UrlSource.java

@@ -0,0 +1,38 @@
+package com.github.barteksc.pdfviewer.source;
+
+import android.content.Context;
+import android.os.Environment;
+import android.os.ParcelFileDescriptor;
+
+import com.shockwave.pdfium.PdfDocument;
+import com.shockwave.pdfium.PdfiumCore;
+
+import java.io.File;
+import java.io.IOException;
+
+/**
+ * Created by 邵鸿轩 on 2017/7/21.
+ */
+
+public class UrlSource implements DocumentSource {
+    private File file;
+    private String url;
+
+    public UrlSource(String url) {
+        this.url = url;
+    }
+
+    @Override
+    public PdfDocument createDocument(Context context, PdfiumCore core, String password) throws IOException {
+        final String SDPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/PDFViewCache/";
+        int index = url.lastIndexOf("/");
+        String fileName = url.substring(index);
+        file = new File(SDPath, fileName);
+        if (file.exists()) {
+            ParcelFileDescriptor pfd = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
+            return core.newDocument(pfd, password);
+        }
+        return null;
+
+    }
+}

android-pdf-viewer/src/main/java/com/github/barteksc/pdfviewer/util/DownloadUtil.java

@@ -0,0 +1,133 @@
+package com.github.barteksc.pdfviewer.util;
+
+import android.support.annotation.NonNull;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import okhttp3.Call;
+import okhttp3.Callback;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.Response;
+
+public class DownloadUtil {
+
+    private static DownloadUtil downloadUtil;
+    private final OkHttpClient okHttpClient;
+
+    public static DownloadUtil get() {
+        if (downloadUtil == null) {
+            downloadUtil = new DownloadUtil();
+        }
+        return downloadUtil;
+    }
+
+    private DownloadUtil() {
+        okHttpClient = new OkHttpClient();
+    }
+
+    /**
+     * @param url 下载连接
+     * @param saveDir 储存下载文件的SDCard目录
+     * @param listener 下载监听
+     */
+    public void download(final String url, final String saveDir, final OnDownloadListener listener) {
+        Request request = new Request.Builder().url(url).build();
+        okHttpClient.newCall(request).enqueue(new Callback() {
+            @Override
+            public void onFailure(Call call, IOException e) {
+                // 下载失败
+                listener.onDownloadFailed();
+            }
+            @Override
+            public void onResponse(Call call, Response response) throws IOException {
+                InputStream is = null;
+                byte[] buf = new byte[2048];
+                int len = 0;
+                FileOutputStream fos = null;
+                // 储存下载文件的目录
+                String savePath = isExistDir(saveDir);
+                try {
+                    is = response.body().byteStream();
+                    long total = response.body().contentLength();
+
+                    int index = url.lastIndexOf("/");
+                    String fileName = url.substring(index);
+                    final File file = new File(saveDir, fileName);
+                    fos = new FileOutputStream(file);
+                    long sum = 0;
+                    while ((len = is.read(buf)) != -1) {
+                        fos.write(buf, 0, len);
+                        sum += len;
+                        int progress = (int) (sum * 1.0f / total * 100);
+                        // 下载中
+                        listener.onDownloading(progress);
+                    }
+                    fos.flush();
+                    // 下载完成
+                    listener.onDownloadSuccess(file);
+                } catch (Exception e) {
+                    listener.onDownloadFailed();
+                } finally {
+                    try {
+                        if (is != null)
+                            is.close();
+                    } catch (IOException e) {
+                    }
+                    try {
+                        if (fos != null)
+                            fos.close();
+                    } catch (IOException e) {
+                    }
+                }
+            }
+        });
+    }
+
+    /**
+     * @param saveDir
+     * @return
+     * @throws IOException
+     * 判断下载目录是否存在
+     */
+    private String isExistDir(String saveDir) throws IOException {
+        // 下载位置
+        File downloadFile = new File( saveDir);
+        if (!downloadFile.mkdirs()) {
+            downloadFile.createNewFile();
+        }
+        String savePath = downloadFile.getAbsolutePath();
+        return savePath;
+    }
+
+    /**
+     * @param url
+     * @return
+     * 从下载连接中解析出文件名
+     */
+    @NonNull
+    private String getNameFromUrl(String url) {
+        return url.substring(url.lastIndexOf("/") + 1);
+    }
+
+    public interface OnDownloadListener {
+        /**
+         * 下载成功
+         */
+        void onDownloadSuccess(File fiel);
+
+        /**
+         * @param progress
+         * 下载进度
+         */
+        void onDownloading(int progress);
+
+        /**
+         * 下载失败
+         */
+        void onDownloadFailed();
+    }
+}

build.gradle

@@ -4,7 +4,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.2'
+        classpath 'com.android.tools.build:gradle:2.3.3'
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.7.3'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
     }