Error:Plugin with id ‘com.github.dcendents.android-maven' not found.

buildscript { repositories { jcenter() } dependencies { classpath ‘com.android.tools.build:gradle:2.0.0' } }

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /><uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /><uses-permission android:name="android.permission.INTERNET" /><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /><uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION"/><uses-permission android:name="android.permission.INSTALL_PACKAGES" />

package cn.cgrs.myphone;import android.app.DownloadManager;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.content.SharedPreferences;import android.database.Cursor;import android.net.Uri;import android.os.Environment;import android.preference.PreferenceManager;import android.provider.OpenableColumns;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.webkit.MimeTypeMap;import android.webkit.WebSettings;import android.webkit.WebView;import android.widget.TextView;import android.widget.Toast;import com.github.barteksc.pdfviewer.listener.OnLoadCompleteListener;import com.github.barteksc.pdfviewer.listener.OnPageChangeListener;import com.github.barteksc.pdfviewer.scroll.DefaultScrollHandle;import com.shockwave.pdfium.PdfDocument;import java.io.File;import java.io.UnsupportedEncodingException;import java.net.URLEncoder;import java.util.List;public class Report extends AppCompatActivity implements OnPageChangeListener, OnLoadCompleteListener {private com.github.barteksc.pdfviewer.PDFView pdfView ;private TextView textView;private DownloadManager downloadManager;private SharedPreferences prefs;private static String DL_ID = "downloadId";Integer pageNumber = 0;String pdfFileName = "yyy.pdf";Uri uri;String AUrl;private Boolean isDown = false;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_report);Intent intent = getIntent(); // 獲取 IntentAUrl = intent.getStringExtra("url"); // 獲取 String 值Log.e("接收url:",AUrl);//AUrl = "http://www.tyyq.cn/xhsapp/download/a03790b7f27243eeada01537a2ce2f77.pdf";String[] exts = AUrl.split("/");pdfFileName = exts[exts.length-1];Log.e("pdf文件名：",pdfFileName);String pdfName = Environment.getExternalStorageDirectory() +"/download";File file = new File(pdfName, pdfFileName);pdfView = (com.github.barteksc.pdfviewer.PDFView)findViewById(R.id.pdfView);textView = (TextView) findViewById(R.id.textView);if(file.exists()){Log.e("Tip：","報告已經(jīng)存在！");//文件已經(jīng)存在，則直接顯示uri = Uri.fromFile(file);displayFromUri(uri);textView.setVisibility(View.GONE);pdfView.setVisibility(View.VISIBLE);}else{isDown = true;}//Log.e("prefs字符串：",prefs.toString());}@Overrideprotected void onResume(){super.onResume();if(isDown){try{Log.e("Tip：","報告不存在,需要下載！");DL_ID = pdfFileName;//文件不存在需要先下載downloadManager = (DownloadManager)getSystemService(DOWNLOAD_SERVICE);prefs = PreferenceManager.getDefaultSharedPreferences(this);StartReport();}catch (Exception ex){Toast.makeText(this, ex.getMessage(), Toast.LENGTH_LONG).show();}}}@Overrideprotected void onPause() {// TODO Auto-generated method stubsuper.onPause();//unregisterReceiver(receiver);try {unregisterReceiver(receiver);} catch (IllegalArgumentException e) {if (e.getMessage().contains("Receiver not registered")) {// Ignore this exception. This is exactly what is desired} else {// unexpected, re-throwthrow e;}}}//下載報告啟動函數(shù)protected void StartReport() {// TODO Auto-generated method stubif(!prefs.contains(DL_ID) || true) { //// String url = AUrl;//Log.e("-----",AUrl);//String[] exts = url.split("/");//pdfFileName = "97b49c0822c14a01b3ebc273679bc6bf.pdf";//exts[exts.length-1];String url = AUrl;//"http://www.tyyq.cn/RollImage/11.pdf";Log.e("開始下載url：",AUrl);//開始下載Uri resource = Uri.parse(encodeGB(url));DownloadManager.Request request = new DownloadManager.Request(resource);request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_MOBILE | DownloadManager.Request.NETWORK_WIFI);request.setAllowedOverRoaming(false);//設(shè)置文件類型MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();String mimeString = mimeTypeMap.getMimeTypeFromExtension(MimeTypeMap.getFileExtensionFromUrl(url));request.setMimeType(mimeString);//在通知欄中顯示//設(shè)置通知欄標(biāo)題request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE);request.setDescription("輿情報告正在下載");//request.setShowRunningNotification(true);request.setVisibleInDownloadsUi(true);//sdcard的目錄下的download文件夾request.setDestinationInExternalPublicDir("/download/", pdfFileName);request.setTitle("輿情報告");long id = downloadManager.enqueue(request);//保存idprefs.edit().putLong(DL_ID, id).commit();} else {Log.e("提示：","下載已經(jīng)開始，檢查狀態(tài)");//下載已經(jīng)開始，檢查狀態(tài)queryDownloadStatus();}registerReceiver(receiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));}/*** 如果服務(wù)器不支持中文路徑的情況下需要轉(zhuǎn)換url的編碼。* @param string* @return*/public String encodeGB(String string){//轉(zhuǎn)換中文編碼String split[] = string.split("/");for (int i = 1; i < split.length; i++) {try {split[i] = URLEncoder.encode(split[i], "GB2312");} catch (UnsupportedEncodingException e) {e.printStackTrace();}split[0] = split[0]+"/"+split[i];}split[0] = split[0].replaceAll("http://+", "%20");//處理空格return split[0];}private BroadcastReceiver receiver = new BroadcastReceiver() {@Overridepublic void onReceive(Context context, Intent intent) {//這里可以取得下載的id，這樣就可以知道哪個文件下載完成了。適用與多個下載任務(wù)的監(jiān)聽Log.v("intent", ""+intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0));queryDownloadStatus();}};private void queryDownloadStatus() {DownloadManager.Query query = new DownloadManager.Query();query.setFilterById(prefs.getLong(DL_ID, 0));Cursor c = downloadManager.query(query);if(c.moveToFirst()) {int status = c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS));switch(status) {case DownloadManager.STATUS_PAUSED:Log.v("down", "STATUS_PAUSED");case DownloadManager.STATUS_PENDING:Log.v("down", "STATUS_PENDING");case DownloadManager.STATUS_RUNNING://正在下載，不做任何事情Log.v("down", "STATUS_RUNNING");break;case DownloadManager.STATUS_SUCCESSFUL://完成Log.v("down", "下載完成");String pdfName = Environment.getExternalStorageDirectory() +"/download";File file = new File(pdfName, pdfFileName);uri = Uri.fromFile(file);Log.e("----",uri.toString());displayFromUri(uri);textView.setVisibility(View.GONE);pdfView.setVisibility(View.VISIBLE);break;case DownloadManager.STATUS_FAILED://清除已下載的內(nèi)容，重新下載Log.v("down", "STATUS_FAILED");downloadManager.remove(prefs.getLong(DL_ID, 0));prefs.edit().clear().commit();break;}}}/*pdf顯示函數(shù)集合*/private void displayFromUri(Uri urii) {//pdfFileName = getFileName(urii);pdfView.fromUri(urii).defaultPage(pageNumber).onPageChange(this).enableAnnotationRendering(true).onLoad(this).scrollHandle(new DefaultScrollHandle(this)).load();}public void onResult(int resultCode, Intent intent) {if (resultCode == RESULT_OK) {uri = intent.getData();displayFromUri(uri);}}@Overridepublic void onPageChanged(int page, int pageCount) {pageNumber = page;setTitle(String.format("%s %s / %s", pdfFileName, page + 1, pageCount));}public String getFileName(Uri uri) {String result = null;if (uri.getScheme().equals("content")) {Cursor cursor = getContentResolver().query(uri, null, null, null, null);try {if (cursor != null && cursor.moveToFirst()) {result = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));}} finally {if (cursor != null) {cursor.close();}}}if (result == null) {result = uri.getLastPathSegment();}return result;}@Overridepublic void loadComplete(int nbPages) {PdfDocument.Meta meta = pdfView.getDocumentMeta();printBookmarksTree(pdfView.getTableOfContents(), "-");}public void printBookmarksTree(List<PdfDocument.Bookmark> tree, String sep) {for (PdfDocument.Bookmark b : tree) {// Log.e(TAG, String.format("%s %s, p %d", sep, b.getTitle(), b.getPageIdx()));if (b.hasChildren()) {printBookmarksTree(b.getChildren(), sep + "-");}}}}