com.cmonbaby.http.stream.download.DownloadFile Maven / Gradle / Ivy
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package com.cmonbaby.http.stream.download;
import android.text.TextUtils;
import android.util.Log;
import com.cmonbaby.http.core.HttpCallback;
import com.cmonbaby.http.dialog.FileLoadable;
import com.cmonbaby.http.schedulers.AndroidSchedulers;
import com.cmonbaby.http.stream.listener.ProgressListener;
import com.cmonbaby.http.utils.RetrofitUtils;
import java.math.BigDecimal;
import okhttp3.ResponseBody;
import retrofit2.Response;
import rx.Observable;
import rx.Observer;
import rx.Subscription;
import rx.functions.Action0;
import rx.functions.Action1;
import rx.schedulers.Schedulers;
/**
* Author: Simon
*
QO: 8950764
*
Email: [email protected]
*
WebSize: https://www.cmonbaby.com
*
Version: 1.0.0
*
Date: 2020/12/28
*
Description: 下载文件
*/
public class DownloadFile {
private final Class clazz; // Retrofit接口Class
private final ProgressListener progressListener; // 下载进度监听
private final DownLoadCall responseService; // 开始请求服务
private final Action0 before; // http请求开始的时候一些界面上的处理
private final Action1> filter; // http请求完成时过滤，比如isSuccess = false,调用onError()
private final FileLoadable loadable; // 对于activity和fragment loading的处理
private String dialogTitle; // loading标题
private String dialogContent; // loading内容摘要
private final HttpCallback> callback; // Http请求回调
private DownloadFile(Builder builder) {
this.clazz = builder.clazz;
this.progressListener = builder.progressListener;
this.responseService = builder.responseService;
this.before = builder.before;
this.filter = builder.filter;
this.loadable = builder.loadable;
this.dialogTitle = builder.dialogTitle;
this.dialogContent = builder.dialogContent;
this.callback = builder.callback;
}
private Subscription startDownload() {
if (TextUtils.isEmpty(dialogTitle)) dialogTitle = "文件下载";
if (TextUtils.isEmpty(dialogContent)) dialogContent = "文件下载中，请稍候……";
Observer> httpCallback = new Observer>() {
@Override
public void onCompleted() {
if (loadable != null) loadable.dismissFileDialog();
}
@Override
public void onError(Throwable e) {
if (loadable != null) loadable.dismissFileDialog();
callback.onError(e);
}
@Override
public void onNext(Response response) {
callback.onSuccessful(response);
}
};
T t = RetrofitUtils.getInstance().createResponseService(clazz, (progress, total, isFinish) -> {
if (progressListener != null) progressListener.onProgress(progress, total, isFinish);
if (loadable != null && total > 0 && progress > 0) {
int pro = new BigDecimal((progress / 1024)).setScale(0, BigDecimal.ROUND_HALF_UP).intValue();
loadable.setDialogMaxProgress((int) (total / 1024));
loadable.setDialogProgress(pro);
}
});
if (responseService == null) {
Log.e("初始化responseService错误", "请实现：requestService(new DownLoadCall())方法");
return null;
}
Observable> observable = responseService.downloadFile(t);
if (observable == null) {
Log.e("初始化observable错误", "请检查实现：responseService(new DownLoadCall())方法");
return null;
}
return observable.subscribeOn(Schedulers.io()) // 是http请求的操作是在io线程中调用，而不是UI线程中。
.observeOn(AndroidSchedulers.mainThread()) // 确保subscriber的回调，即onNext、onError和onCompleted是在Ui线程中回调
.doOnSubscribe(() -> {
if (loadable != null) loadable.showProgressDialog(); // 如果不为空，就进行loading的show操作
if (loadable != null) loadable.setFileDialogTitle(dialogTitle);
if (loadable != null) loadable.setFileDialogContent(dialogContent);
if (before != null) before.call(); // 进行额外的界面处理，在http请求开始的时候
}) // http请求开始时，一些初始化的操作。比如loading界面的显示
.subscribeOn(AndroidSchedulers.mainThread()) // 这里切换到UI线程，确保doOnSubscribe在UI线程中进行，以便subscribe回调是在UI线程中进行。
.doOnNext(response -> { // 处理
if (filter != null) filter.call(response); // 进行额外的界面处理，在http请求开始的时候
})
.subscribe(httpCallback);
}
public static final class Builder {
private final Class clazz; // Retrofit接口Class
private ProgressListener progressListener; // 下载进度监听
private DownLoadCall responseService; // 开始请求服务
private Action0 before; // http请求开始的时候一些界面上的处理
private Action1> filter; // http请求完成时过滤，比如isSuccess = false,调用onError()
private FileLoadable loadable; // 对于activity和fragment loading的处理
private String dialogTitle; // loading标题
private String dialogContent; // loading内容摘要
private HttpCallback> callback; // Http请求回调
private Builder(Class clazz) {
this.clazz = clazz;
}
public static Builder download(Class clazz) {
return new Builder<>(clazz);
}
public Builder progressListener(ProgressListener progressListener) {
this.progressListener = progressListener;
return this;
}
public Builder responseService(DownLoadCall responseService) {
this.responseService = responseService;
return this;
}
public Builder before(Action0 before) {
this.before = before;
return this;
}
public Builder filter(Action1> filter) {
this.filter = filter;
return this;
}
public Builder loadable(FileLoadable loadable) {
this.loadable = loadable;
return this;
}
public Builder dialogTitle(String dialogTitle) {
this.dialogTitle = dialogTitle;
return this;
}
public Builder dialogContent(String dialogContent) {
this.dialogContent = dialogContent;
return this;
}
public Builder callback(HttpCallback> callback) {
this.callback = callback;
return this;
}
public Subscription toSubscribe() {
return new DownloadFile<>(this).startDownload();
}
}
}