快速实现自己的移动PDF阅读器-Android篇

下面介绍如何用Foxit Mobile PDF SDK快速编写一个功能完整的Android Reader。

参考资料

官网资料

下载申请：https://www.foxitsoftware.com/products/sdk/register.php?product=MobilePDFSDK

产品介绍：https://www.foxitsoftware.com/products/mobile-pdf-sdk/

相关文档资料汇总地址：https://developers.foxitsoftware.com/sdk-docs/

API 手册：https://developers.foxitsoftware.com/resources/mobile-pdf-sdk/api_reference_android.html

Getting Start Guide：https://developers.foxitsoftware.com/kb/article/getting-started-guide-foxit-mobilepdf-sdk-android/

开发者手册：https://developers.foxitsoftware.com/kb/article/developer-guide-mobile-pdf-sdk-android/

 本文涉及的Demo代码下载

链接 :http://pan.baidu.com/s/1slTqwNV  密码: t47p

注意：需要自己去 https://www.foxitsoftware.com/products/sdk/register.php?product=MobilePDFSDK 申请最新的试用包，我Demo中的key已经过期了。

开发步骤

第一步依然是创建功能和各种库的导入，具体的不多说了。

几句话总结下要点和我这里的Demo是怎么做的。

创建一个Empty Activity的Android 工程，这里工程名称暂定AmyTestRDK4,

接着我用最简单的办法导入库，把SDK包中的lib 文件夹除了uiextension_src外的文件都拷贝到 AmyTestRDK4/app/libs/ 的目录

接着设置build.gradle

App 的 build.gradle 设置

android下加入

sourceSets {    main {        jniLibs.srcDirs = ['libs']    }}

另外加入

repositories {    flatDir {        dirs 'libs' }}

dependencies中加入：

compile(name: 'FoxitRDKUIExtensions', ext: 'aar')compile fileTree(dir: 'libs', include: ['*.jar'])

还有需要加

compile 'com.android.support:recyclerview-v7:25.3.1'

完整的build.gradle文件如下：

apply plugin: 'com.android.application' android {    compileSdkVersion 25    buildToolsVersion "25.0.3"    defaultConfig {        applicationId "com.foxit.amy.amytestrdk4"        minSdkVersion 16        targetSdkVersion 25        versionCode 1        versionName "1.0"        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"    }    buildTypes {        release {            minifyEnabled false            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'        }    }    sourceSets {        main {            jniLibs.srcDirs = ['libs']        }    }} repositories {    flatDir {        dirs 'libs'    }} dependencies {    compile(name: 'FoxitRDKUIExtensions', ext: 'aar')    compile fileTree(dir: 'libs', include: ['*.jar'])    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {        exclude group: 'com.android.support', module: 'support-annotations'    })    compile 'com.android.support:appcompat-v7:25.3.1'    compile 'com.android.support:recyclerview-v7:25.3.1'    compile 'com.android.support.constraint:constraint-layout:1.0.2'    testCompile 'junit:junit:4.12'}

接下来是库的初始化，设置UI 配置文件，并打开文档

private PDFViewCtrl pdfViewCtrl = null;private RelativeLayout parent = null;private UIExtensionsManager uiextensionsManager = null;private PDFReader defaultPDFReader = null;

pdfViewCtrl = new PDFViewCtrl(this.getApplicationContext());// Instantiate a PDFViewCtrl object// Get the config file, and set it to UIExtensionsManager.InputStream stream = this.getApplicationContext().getResources().openRawResource(R.raw.uiextensions_config);UIExtensionsManager.Config config = new UIExtensionsManager.Config(stream);uiextensionsManager = new UIExtensionsManager(this.getApplicationContext(), null,pdfViewCtrl, config);uiextensionsManager.setAttachedActivity(this);pdfViewCtrl.setUIExtensionsManager(uiextensionsManager);defaultPDFReader = (PDFReader) uiextensionsManager.getPDFReader();defaultPDFReader.onCreate(this,pdfViewCtrl, savedInstanceState);String path = "/mnt/sdcard/Download/JIRA.pdf";defaultPDFReader.openDocument(path, null);setContentView(defaultPDFReader.getContentView());

Activity中重载相应的事件

 需要重载Activity的onStart，onPause，onResume，onStop，onDestroy, onActivityResult, onConfigurationChanged, onKeyDown, onPrepareOptionsMenu事件，把PDF Reader的相应事件在这里重载执行。

@Overrideprotected void onStart() {    super.onStart();    if (defaultPDFReader == null)        return;    defaultPDFReader.onStart(this);}@Overrideprotected void onPause() {    super.onPause();    if (defaultPDFReader == null)        return;    defaultPDFReader.onPause(this);} @Overrideprotected void onResume() {    super.onResume();    if (defaultPDFReader == null)        return;    defaultPDFReader.onResume(this);} @Overrideprotected void onStop() {    super.onStop();    if (defaultPDFReader == null)        return;    defaultPDFReader.onStop(this);} @Overrideprotected void onDestroy() {    this.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);    if (defaultPDFReader != null)        defaultPDFReader.onDestroy(this);    super.onDestroy();} @Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {    super.onActivityResult(requestCode, resultCode, data);    if (defaultPDFReader != null)        defaultPDFReader.onActivityResult(this, requestCode, resultCode, data);} @Overridepublic void onConfigurationChanged(Configuration newConfig) {    super.onConfigurationChanged(newConfig);    if (defaultPDFReader == null)        return;    ((MainFrame) defaultPDFReader.getMainFrame()).updateSettingBar();    defaultPDFReader.onConfigurationChanged(this, newConfig);} @Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {    if (defaultPDFReader != null && defaultPDFReader.onKeyDown(this, keyCode, event))        return true;    return super.onKeyDown(keyCode, event);} @Overridepublic boolean onPrepareOptionsMenu(Menu menu) {    if (defaultPDFReader != null && !defaultPDFReader.onPrepareOptionsMenu(this, menu))        return false;    return super.onPrepareOptionsMenu(menu);}

下面是完整的"MainActivity" 文件:

package com.foxit.amy.amytestrdk4; import android.content.Intent;import android.content.res.Configuration;import android.os.Bundle;import android.os.Environment;import android.support.v7.app.AppCompatActivity;import android.view.KeyEvent;import android.view.Menu;import android.view.WindowManager;import android.widget.RelativeLayout; import com.foxit.sdk.PDFViewCtrl;import com.foxit.sdk.common.Library;import com.foxit.sdk.common.PDFException;import com.foxit.uiextensions.UIExtensionsManager;import com.foxit.uiextensions.pdfreader.impl.MainFrame;import com.foxit.uiextensions.pdfreader.impl.PDFReader; import java.io.InputStream; public class MainActivity extends AppCompatActivity {     private String getStorageDirectory(){        String path = null;        boolean sdExist = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);        if (sdExist) {            path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/";        }        return path;    }     private PDFViewCtrl pdfViewCtrl = null;    private RelativeLayout parent = null;    private UIExtensionsManager uiextensionsManager = null;    private PDFReader defaultPDFReader = null;     @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        System.loadLibrary("rdk");        String sn = "";        String key = "";        try {            // initialize the library            Library.init(sn, key);        } catch (PDFException e) {            e.printStackTrace();            return;        }        // Instantiate a PDFViewCtrl object        pdfViewCtrl = new PDFViewCtrl(this.getApplicationContext());         //// Get the config file, and set it to UIExtensionsManager.        InputStream stream = this.getApplicationContext().getResources().openRawResource(R.raw.uiextensions_config);        UIExtensionsManager.Config config = new UIExtensionsManager.Config(stream);        // Instantiate a UIExtensionsManager object and set it to PDFViewCtrl.        uiextensionsManager = new UIExtensionsManager(this.getApplicationContext(), null, pdfViewCtrl, config);        uiextensionsManager.setAttachedActivity(this);        pdfViewCtrl.setUIExtensionsManager(uiextensionsManager);         // Get current PDFReader, and set it to PDFViewCtrl.        defaultPDFReader = (PDFReader) uiextensionsManager.getPDFReader();        defaultPDFReader.onCreate(this, pdfViewCtrl, savedInstanceState);         // Load a document        String sdcardPath = getStorageDirectory();        String path = sdcardPath + "FoxitSDK/Sample.pdf";        try {        defaultPDFReader.openDocument(path, null);        setContentView(defaultPDFReader.getContentView());        } catch (Exception e) {        // TODO Auto-generated catch block            e.printStackTrace();        }    }     @Override    protected void onStart() {        super.onStart();        if (defaultPDFReader == null)            return;        defaultPDFReader.onStart(this);    }    @Override    protected void onPause() {        super.onPause();        if (defaultPDFReader == null)            return;        defaultPDFReader.onPause(this);    }     @Override    protected void onResume() {        super.onResume();        if (defaultPDFReader == null)            return;        defaultPDFReader.onResume(this);    }     @Override    protected void onStop() {        super.onStop();        if (defaultPDFReader == null)            return;        defaultPDFReader.onStop(this);    }     @Override    protected void onDestroy() {        this.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);        if (defaultPDFReader != null)            defaultPDFReader.onDestroy(this);        super.onDestroy();    }     @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if (defaultPDFReader != null)            defaultPDFReader.onActivityResult(this, requestCode, resultCode, data);    }     @Override    public void onConfigurationChanged(Configuration newConfig) {        super.onConfigurationChanged(newConfig);        if (defaultPDFReader == null)            return;        ((MainFrame) defaultPDFReader.getMainFrame()).updateSettingBar();        defaultPDFReader.onConfigurationChanged(this, newConfig);    }     @Override    public boolean onKeyDown(int keyCode, KeyEvent event) {        if (defaultPDFReader != null && defaultPDFReader.onKeyDown(this, keyCode, event))            return true;        return super.onKeyDown(keyCode, event);    }     @Override    public boolean onPrepareOptionsMenu(Menu menu) {        if (defaultPDFReader != null && !defaultPDFReader.onPrepareOptionsMenu(this, menu))            return false;        return super.onPrepareOptionsMenu(menu);    }  }

示例代码工程下载：

链接 :http://pan.baidu.com/s/1slTqwNV  密码: t47p

注意：需要自己去 https://www.foxitsoftware.com/products/sdk/register.php?product=MobilePDFSDK 申请最新的试用包，我Demo中的key已经过期了。