Android 封装okgo通用下载文件到手机指定目录下的工具类

- 日理万妓 2022-05-19 08:58 418阅读 0赞

1、封装通用的下载文件工具类

package com.ywb.tuyue.download;
    import android.content.Context;
    import android.os.Environment;
    import android.text.TextUtils;
    import android.util.Log;
    import com.blankj.utilcode.util.LogUtils;
    import com.blankj.utilcode.util.SPUtils;
    import com.lzy.okgo.OkGo;
    import com.lzy.okgo.callback.FileCallback;
    import com.lzy.okgo.model.Progress;
    import com.lzy.okgo.request.base.Request;
    import java.io.File;
    /** * Description: 使用okgo下载文件 zip video music txt image * Created by wcystart on 2018/7/4. */
    public class DownLoadFileUtils { 
        private static String mBasePath; //本地文件存储的完整路径 /storage/emulated/0/book/恰似寒光遇骄阳.txt
        /** * * @param context 上下文 * @param fileUrl 下载完整url * @param destFileDir SD路径 * @param destFileName 文件名 * @param mFileRelativeUrl 下载相对地址 * （我们从服务器端获取到的数据都是相对的地址）例如： "filepath": "/movie/20180511/1526028508.txt" */
        public static void downloadFile(Context context, String fileUrl, String destFileDir,String destFileName,String mFileRelativeUrl){
            String  mDestFileName =destFileName+mFileRelativeUrl.substring(mFileRelativeUrl.lastIndexOf("."),mFileRelativeUrl.length());
            OkGo.<File>get(fileUrl).tag(context).execute(new FileCallback(destFileDir,mDestFileName) { //文件下载时指定下载的路径以及下载的文件的名称
                @Override
                public void onStart(Request<File, ? extends Request> request) {
                    super.onStart(request);
                    LogUtils.e("开始下载文件"+"DDDDD");
                }
    
                @Override
                public void onSuccess(com.lzy.okgo.model.Response<File> response) {
                    LogUtils.e("下载文件成功"+"DDDDD"+response.body().length());
                    mBasePath=response.body().getAbsolutePath();
                 }
    
                @Override
                public void onFinish() {
                    super.onFinish();
                    LogUtils.e("下载文件完成"+"DDDDD");
                    SPUtils.getInstance().put("localPath",mBasePath);
                }
    
                @Override
                public void onError(com.lzy.okgo.model.Response<File> response) {
                    super.onError(response);
                    LogUtils.e("下载文件出错"+"DDDDD"+response.message());
    
                }
    
                @Override
                public void downloadProgress(Progress progress) {
                    super.downloadProgress(progress);
                    float  dLProgress= progress.fraction;
                    LogUtils.e("文件下载的进度"+"DDDDD"+dLProgress);
                }
            });
        }
    
        //拼接一个本地的完整的url 供下载文件时传入一个本地的路径
        private static final String mSDPath = Environment.getExternalStorageDirectory().getPath();
        //分类别路径
        private static String mClassifyPath=null;
        public static String customLocalStoragePath(String differentName){
            File basePath=new File(mSDPath); // /storage/emulated/0
            mClassifyPath=mSDPath+"/"+differentName+"/";  //如果传来的是 book 拼接就是 /storage/emulated/0/book/
                                                        //如果传来的是game 那拼接就是 /storage/emulated/0/game/
            if(!basePath.exists()){
                basePath.mkdirs();
                System.out.println("文件夹创建成功");
            }
    
            return mClassifyPath;
        }
    
    
        //截取一个文件加载显示时传入的一个本地完整路径
        public static String subFileFullName(String fileName,String fileUrl){
            String cutName=fileName+fileUrl.substring(fileUrl.lastIndexOf("."),fileUrl.length());  //这里获取的是 恰似寒光遇骄阳.txt
            return cutName;
        }
    }

2、举例在需要下载的时候使用这个工具类 //比如下载图片

package com.ywb.tuyue.ui.unlock;
    
    import android.content.Context;
    import android.os.Bundle;
    import android.util.Log;
    import android.view.View;
    import android.widget.ImageView;
    
    import com.blankj.utilcode.util.LogUtils;
    import com.bumptech.glide.Glide;
    import com.ywb.tuyue.MyApplication;
    import com.ywb.tuyue.R;
    import com.ywb.tuyue.constants.Constants;
    import com.ywb.tuyue.constants.IpConfig;
    import com.ywb.tuyue.db.dao.CountDao;
    import com.ywb.tuyue.download.DownLoadFileUtils;
    import com.ywb.tuyue.entity.Count;
    import com.ywb.tuyue.entity.StickyEvent;
    import com.ywb.tuyue.entity.TAdvertList;
    import com.ywb.tuyue.entity.TAdvertType;
    import com.ywb.tuyue.ui.main.MainActivity;
    import com.ywb.tuyue.ui.mvp.BaseActivity;
    import com.ywb.tuyue.ui.splash.SplashActivity;
    import com.ywb.tuyue.utils.GlideUtils;
    import com.ywb.tuyue.utils.PreferencesUtils;
    import com.ywb.tuyue.widget.CustomerUnlockView;
    import org.greenrobot.eventbus.EventBus;
    import java.util.List;
    import javax.inject.Inject;
    public class UnlockActivity extends BaseActivity {
        //TODO: 2018/6/20 控件
        private ImageView mUnlockAdvertImage;
        private CustomerUnlockView mCustomerUnlockView;
        String mUnlockImageUrl;
        @Override
        public int bindLayout() {
            return R.layout.activity_unlock;
        }
        @Override
        public void initParms(Bundle parms) {
            //parms.getString()
            // TODO: 2018/6/20 接收参数
        }
     @Override
        public void initView(View view) {
            //接收从flash页中传过来的参数 获取的是图片的相对路径：/advert/20180706/1530849977.jpg
            mUnlockImageUrl = (String) mOperation.getParameter(Constants.UNLOCK_IMAGE_URL);
    
            // TODO: 2018/6/20 布局
            mUnlockAdvertImage = findViewById(R.id.unlock_bg_advert); //图片容器
            mCustomerUnlockView = findViewById(R.id.unlock_view);
    
            **//下载图片
            String imageUrl = IpConfig.BASE_IMAGE_URL + mUnlockImageUrl;//http://47.98.121.127/upload/advert/20180706/1530849977.jpg
            String localPath = DownLoadFileUtils.customLocalStoragePath("image");// /storage/emulated/0/image/
            DownLoadFileUtils.downloadFile(this, imageUrl, localPath, "suoping", mUnlockImageUrl);
            //localPath+DownLoadFileUtils.subFileFullName("suoping",mUnlockImageUrl)就是：/storage/emulated/0/image/suoping.jpg  本地SD卡中图片存储的完整路径
            //拿本地路径通过Glide加载到imageView控件中
            Glide.with(this).load(localPath+DownLoadFileUtils.subFileFullName("suoping",mUnlockImageUrl)).into(mUnlockAdvertImage);**
        }
        @Override
        public void doBusiness(Context mContext) {
            // TODO: 2018/6/20  业务调用
        }
    
        @Override
        public void initInjector() {
            getComponent().inject(this);
        }
    }

3、这就是使用okgo将文件一边下载一边保存到本地指定SD卡目录下的一个使用流程！！！