PDF查看：Android 用PDFView实现PDF查看器

Posted 2021-08-11 zhangjin1120

加载PDF的url链接，上效果：

android PDF 查看器Demo效果

• 导入barteksc/AndroidPdfViewer

    implementation 'com.github.barteksc:android-pdf-viewer:2.8.2'

• 网络权限

    <uses-permission android:name="android.permission.INTERNET" />

• 布局代码：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <com.github.barteksc.pdfviewer.PDFView
        android:id="@+id/pdfView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
</RelativeLayout>

• MainActivity.java测试代码：

public class MainActivity extends AppCompatActivity {
    PDFView pdfView;
    ProgressDialog dialog;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        pdfView = findViewById(R.id.pdfView);
        dialog = ProgressDialog.show(MainActivity.this, "", "正在加载PDF", true);
        new RetrivePDFStream().execute("http://www.fao.fudan.edu.cn/_upload/article/files/f5/53/8b40af524563b9b60049899b2dd3/c9a205b4-4188-4af3-863e-bc4e56872e33.pdf");

    }

    

    class RetrivePDFStream extends AsyncTask<String, Void, InputStream> {

        protected InputStream doInBackground(String... strings) {
            InputStream inputStream = null;
            try {
                URL uri = new URL(strings[0]);
                HttpURLConnection urlConnection = (HttpURLConnection) uri.openConnection();
                if (urlConnection.getResponseCode() == 200) {
                    inputStream = new BufferedInputStream(urlConnection.getInputStream());
                }
            } catch (IOException e) {
                return null;
            }
            return inputStream;
        }

        protected void onPostExecute(InputStream inputStream) {
            pdfView.fromStream(inputStream)
                    .onLoad(new OnLoadCompleteListener() {
                        @Override
                        public void loadComplete(int nbPages) {
                            dialog.dismiss();
                        }
                    })
                    .load();
        }
    }
}