怎么在Android中实现文档浏览功能
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 CallloadPdfFile(@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:
SuperFileView2代码,这个自定义的类是从https://github.com/ZhongXiaoHong/superFileView导入
import android.content.Context; import android.os.Bundle; import android.os.Environment; import android.text.TextUtils; import android.util.AttributeSet; import android.util.Log; import android.widget.FrameLayout; import android.widget.LinearLayout; import com.tencent.smtt.sdk.TbsReaderView; import java.io.File; /** * * Created by 12457 on 2017/8/29. */ public class SuperFileView2 extends FrameLayout { private static String TAG = "SuperFileView"; private TbsReaderView mTbsReaderView; private Context context; public SuperFileView2(Context context) { this(context, null, 0); } public SuperFileView2(Context context, AttributeSet attrs) { this(context, attrs, 0); } public SuperFileView2(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); mTbsReaderView = new TbsReaderView(context, new TbsReaderView.ReaderCallback() { @Override public void onCallBackAction(Integer integer, Object o, Object o1) { } }); this.addView(mTbsReaderView, new LinearLayout.LayoutParams(-1, -1)); this.context = context; } private OnGetFilePathListener mOnGetFilePathListener; public void setOnGetFilePathListener(OnGetFilePathListener mOnGetFilePathListener) { this.mOnGetFilePathListener = mOnGetFilePathListener; } private TbsReaderView getTbsReaderView(Context context) { return new TbsReaderView(context, new TbsReaderView.ReaderCallback() { @Override public void onCallBackAction(Integer integer, Object o, Object o1) { } }); } public void displayFile(File mFile) { if (mFile != null && !TextUtils.isEmpty(mFile.toString())) { //增加下面一句解决没有TbsReaderTemp文件夹存在导致加载文件失败 String bsReaderTemp = Environment.getExternalStorageDirectory()+ File.separator+"TbsReaderTemp"; File bsReaderTempFile =new File(bsReaderTemp); if (!bsReaderTempFile.exists()) { Log.d("xxx","准备创建/storage/emulated/0/TbsReaderTemp!!"); boolean mkdir = bsReaderTempFile.mkdir(); if(!mkdir){ Log.d("xxx","创建/storage/emulated/0/TbsReaderTemp失败!!!!!"); } } //加载文件 Bundle localBundle = new Bundle(); Log.d("xxx",mFile.toString()); localBundle.putString("filePath", mFile.toString()); localBundle.putString("tempPath", bsReaderTemp); if (mTbsReaderView == null){ mTbsReaderView = getTbsReaderView(context.getApplicationContext()); String fileType = getFileType(mFile.toString()); boolean bool = mTbsReaderView.preOpen(fileType,false); if (bool) { try { mTbsReaderView.openFile(localBundle); }catch (Exception e){ e.printStackTrace(); } } }else { String fileType = getFileType(mFile.toString()); boolean bool = mTbsReaderView.preOpen(fileType,false); if (bool) { try { mTbsReaderView.openFile(localBundle); }catch (Exception e){ e.printStackTrace(); } } } } else { Log.d("xxx","文件路径无效!"); } } /*** * 获取文件类型 * * @param paramString * @return */ private String getFileType(String paramString) { String str = ""; if (TextUtils.isEmpty(paramString)) { Log.d(TAG, "paramString---->null"); return str; } Log.d(TAG, "paramString:" + paramString); int i = paramString.lastIndexOf('.'); if (i <= -1) { Log.d(TAG, "i <= -1"); return str; } str = paramString.substring(i + 1); Log.d(TAG, "paramString.substring(i + 1)------>" + str); return str; } public void show() { if(mOnGetFilePathListener!=null){ mOnGetFilePathListener.onGetFilePath(this); } } /*** * 将获取File路径的工作,“外包”出去 */ public interface OnGetFilePathListener { void onGetFilePath(SuperFileView2 mSuperFileView2); } public void onStopDisplay() { if (mTbsReaderView != null) { mTbsReaderView.onStop(); } } }
看完上述内容,你们掌握怎么在Android中实现文档浏览功能的方法了吗?如果还想学到更多技能或想了解更多相关内容,欢迎关注创新互联行业资讯频道,感谢各位的阅读!
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