怎么在Android中实现文档浏览功能？相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。
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一、下载腾讯X5内核
1.前往https://x5.tencent.com/下载Android的内核，新版本的腾讯X5可以直接在bulid.gradle集成 api 'com.tencent.tbs.tbssdk:sdk:43697'，如果是在App里集成可以把api换成implementation
2.AndroidStudio导入腾讯X5
a.把下载好的jar包导入libs，然后run as，再把jnilibs导入main包下
b. module的build.gradle添加cpu适配
3.Application中腾讯X5初始化,在onCreate()方法调用init方法
QbSdk.initX5Environment(this, new QbSdk.PreInitCallback() {
@Override
public void onCoreInitFinished() {
}
@Override
public void onViewInitFinished(boolean b) {
Log.e("xxx","hasLoad"+b);
//此处将内核加载是否成功的状态保存到本地，SharePreference工具类可换为自己的
SharedPreferenceUtils.saveBoolean(getApplicationContext(),"hasLoad",b);
}
});4.应用内调用，无论是否加载内核，都是把在线的文档下载到本地然后打开，不同的是，未加载内核会借助QQ浏览器或其他App的文件浏览功能类似微信（这个调用，腾讯X5已自动处理，我们无需关心），而加载内核后，使用X5的TbsReaderView来打开文件，接下来就是具体代码。
a.bulid.gradle中集成Retrofit，RxJava和进度管理器ProgressManager
implementation 'io.reactivex:rxandroid:1.2.1' implementation 'com.squareup.retrofit2:converter-gson:2.3.0' implementation 'com.squareup.retrofit2:adapter-rxjava:2.1.0' implementation 'com.squareup.retrofit2:retrofit:2.3.0' implementation 'io.reactivex:rxjava:1.2.6' implementation 'me.jessyan:progressmanager:1.5.0'
写网络下载工具
public interface LoadFileApi {
@GET
Call loadPdfFile(@Url String fileUrl);
}
public class LoadFileModel {
//使用该方法来下载文件
public static void loadPdfFile(String url, Callback callback) {
Retrofit retrofit = new Retrofit.Builder()
.baseUrl("https://www.baidu.com/")
.client(ProgressManager.getInstance().with(new OkHttpClient.Builder())
.build())
.addConverterFactory(GsonConverterFactory.create())
.build();
LoadFileApi mLoadFileApi = retrofit.create(LoadFileApi.class);
if (!TextUtils.isEmpty(url)) {
Call call = mLoadFileApi.loadPdfFile(url);
call.enqueue(callback);
}
}
} b.具体调用
首先注册文件进度下载监听
private ProgressDialog commonProgressDialog;//切换为自己的进度控件
private ProgressInfo mLastDownloadingInfo;
ProgressManager.getInstance().addResponseListener(url, new ProgressListener() {
@Override
public void onProgress(ProgressInfo progressInfo) {
if (mLastDownloadingInfo == null) {
mLastDownloadingInfo = progressInfo;
}
//因为是以请求开始时的时间作为 Id ,所以值越大,说明该请求越新
if (progressInfo.getId() < mLastDownloadingInfo.getId()) {
return;
} else if (progressInfo.getId() > mLastDownloadingInfo.getId()) {
mLastDownloadingInfo = progressInfo;
}
int progress = mLastDownloadingInfo.getPercent();
commonProgressDialog.setProgress(progress);
Log.d("xxx", "--Download-- " + progress + " % " + mLastDownloadingInfo.getSpeed() + " byte/s " + mLastDownloadingInfo.toString());
if (mLastDownloadingInfo.isFinish()) {
//说明已经下载完成
commonProgressDialog.dismiss();
Log.d("xxx", "--Download-- finish");
}
}
@Override
public void onError(long id, Exception e) {
e.printStackTrace();
new Handler().post(new Runnable() {
@Override
public void run() {
commonProgressDialog.dismiss();
}
});
}
});
}然后打开文件
private static final String DOWN_DIR = Environment.getExternalStorageDirectory()
+ File.separator+"Download"; //文件下载的路径，可以自定义
//打开文件
private void openFile(String filePath,String fileName) {
boolean hasLoad = SharedPreferenceUtils.getBoolean(mContext, "hasLoad");//是否记载内核
if (hasLoad){
//展示文件的Activity
Intent intentDoc = new Intent(this,FileDisplayActivity.class);
intentDoc.putExtra("path",filePath);
intentDoc.putExtra("fileName",fileName);
startActivity(intentDoc);
}else {
if(!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
Toast.makeText(this,"当前SD不可用",Toast.LENGTH_LONG).show();
return;
}
try {
File file = new File(DOWN_DIR, fileName);
if (file.exists()){
QbSdk.openFileReader(this, file.getAbsolutePath(), null, new ValueCallback() {
@Override
public void onReceiveValue(String s) {
Log.e("xxx",s);
}
});
} else {
downLoadFile(filePath,fileName);
}
} catch (Exception e) {
e.printStackTrace();
ToastUtils.showShortToast(mContext, "已下载过了");
}
}
}
private void downLoadFile(final String url, final String fileName) {
commonProgressDialog.show();
LoadFileModel.loadPdfFile(url, new Callback() {
@Override
public void onResponse(@NonNull Call call, @NonNull Response response) {
InputStream is = null;
byte[] buf = new byte[2048];
int len;
FileOutputStream fos = null;
try {
ResponseBody responseBody = response.body();
if (responseBody != null) {
is = responseBody.byteStream();
final File file = new File(DOWN_DIR, fileName);
fos = new FileOutputStream(file);
while ((len = is.read(buf)) != -1) {
fos.write(buf, 0, len);
}
fos.flush();
//未加载内核调用方法
QbSdk.openFileReader(mContext, file.getAbsolutePath(), null, new ValueCallback() {
@Override
public void onReceiveValue(String s) {
Log.e("xxx",s);
}
});
ToastUtils.showLongToast(MeetingDetailActivity.this, "下载成功,保存在Download文件夹下");
}
} catch (Exception e) {
commonProgressDialog.dismiss();
ProgressManager.getInstance().notifyOnErorr(url,e);
ToastUtils.showLongToast(MeetingDetailActivity.this, "下载失败");
} finally {
try {
if (is != null)
is.close();
} catch (IOException e) {
e.printStackTrace();
}
try {
if (fos != null)
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
@Override
public void onFailure(@NonNull Call call, @NonNull Throwable t) {
t.printStackTrace();
ToastUtils.showShortToast(MeetingDetailActivity.this, "下载失败");
commonProgressDialog.dismiss();
}
});
} FileDisplayActivity代码,对于一些包名可以切换为自己的包名，还有一些第三方库像进度展示，也可以切换为自己的进度控件
import android.content.Intent;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.view.WindowManager;
import android.widget.TextView;
import com.anshi.oatencentschool.R;
import com.anshi.oatencentschool.utils.DialogBuild;
import com.anshi.oatencentschool.utils.StatusBarUtils;
import com.anshi.oatencentschool.utils.ToastUtils;
import com.anshi.oatencentschool.utils.WeakHandler;
import com.anshi.oatencentschool.utils.filetool.LoadFileModel;
import com.anshi.oatencentschool.utils.filetool.SuperFileView2;
import com.kaopiz.kprogresshud.KProgressHUD;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import me.jessyan.progressmanager.ProgressListener;
import me.jessyan.progressmanager.ProgressManager;
import me.jessyan.progressmanager.body.ProgressInfo;
import okhttp3.ResponseBody;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
public class FileDisplayActivity extends AppCompatActivity {
private String TAG = "FileDisplayActivity";
//Tencent 提供的TBS阅读浏览功能，不借助第三方软件打开office和pdf文件
private SuperFileView2 mSuperFileView;
private String filePath;
private TextView mTextView;
private static final String DOWN_DIR = Environment.getExternalStorageDirectory()
+ File.separator+"Download";
private String fileName;
private KProgressHUD commonProgressDialog;
private WeakHandler weakHandler = new WeakHandler(new Handler.Callback() {
@Override
public boolean handleMessage(Message msg) {
int progress = msg.arg1;
if (progress==100){
commonProgressDialog.setProgress(progress);
commonProgressDialog.dismiss();
}else {
commonProgressDialog.setProgress(progress);
}
return true;
}
});
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_file_display);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON|WindowManager.LayoutParams.FLAG_FULLSCREEN);
commonProgressDialog = DialogBuild.getBuild().createCommonProgressDialog(this, "下载中");
init();
}
/**
* 初始化
*/
public void init() {
mTextView = (TextView) findViewById(R.id.file_album_name);
fileName = getIntent().getStringExtra("fileName");
int lastIndexOf = fileName.lastIndexOf(".");
String substring = fileName.substring(0, lastIndexOf);
mTextView.setText(substring);
mSuperFileView = (SuperFileView2) findViewById(R.id.mSuperFileView);
mSuperFileView.setOnGetFilePathListener(new SuperFileView2.OnGetFilePathListener() {
@Override
public void onGetFilePath(SuperFileView2 mSuperFileView2) {
getFilePathAndShowFile(mSuperFileView);
}
});
Intent intent = this.getIntent();
String path = (String) intent.getSerializableExtra("path");
if (!TextUtils.isEmpty(path)) {
Log.d(TAG, "文件path:" + path);
setFilePath(path);
}
mSuperFileView.show();
ProgressManager.getInstance().addResponseListener(path, new ProgressListener() {
@Override
public void onProgress(ProgressInfo progressInfo) {
int percent = progressInfo.getPercent();
Message obtain = Message.obtain();
obtain.arg1 = percent;
weakHandler.sendMessage(obtain);
}
@Override
public void onError(long id, Exception e) {
}
});
}
@Override
protected void onResume() {
super.onResume();
StatusBarUtils.setWindowStatusBarColor(this,R.color.color_main);
}
/**
* 显示文件
* @param mSuperFileView2 控件
*/
private void getFilePathAndShowFile(SuperFileView2 mSuperFileView2) {
if (getFilePath().contains("http")&&!new File(DOWN_DIR, fileName).exists()) {//网络地址要先下载
downLoadFile(getFilePath(),fileName,mSuperFileView2);
} else {
try {
mSuperFileView2.displayFile(new File(DOWN_DIR, fileName));
}catch (Exception e){
e.printStackTrace();
}
}
}
public void setFilePath(String fileUrl) {
this.filePath = fileUrl;
}
private String getFilePath() {
return filePath;
}
/**
* 回退上一级菜单
* @param view 控件
*/
public void onClick(View view) {
finish();
}
private void downLoadFile(final String url, final String fileName,final SuperFileView2 mSuperFileView2) {
commonProgressDialog.show();
LoadFileModel.loadPdfFile(url, new Callback() {
@Override
public void onResponse(@NonNull Call call, @NonNull Response response) {
InputStream is = null;
byte[] buf = new byte[2048];
int len;
FileOutputStream fos = null;
try {
ResponseBody responseBody = response.body();
is = responseBody.byteStream();
final File file = new File(DOWN_DIR, fileName);
fos = new FileOutputStream(file);
while ((len = is.read(buf)) != -1) {
fos.write(buf, 0, len);
}
fos.flush();
mSuperFileView2.displayFile(file);
ToastUtils.showLongToast(FileDisplayActivity.this, "下载成功,保存在Download文件夹下");
} catch (Exception e) {
commonProgressDialog.dismiss();
ToastUtils.showLongToast(FileDisplayActivity.this, "下载失败");
} finally {
try {
if (is != null)
is.close();
} catch (IOException e) {
e.printStackTrace();
}
try {
if (fos != null)
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
@Override
public void onFailure(@NonNull Call call, @NonNull Throwable t) {
t.printStackTrace();
ToastUtils.showShortToast(FileDisplayActivity.this, "下载失败");
commonProgressDialog.dismiss();
}
});
}
} 布局Layout:
