Android使用Xutil3.0下载文件.md

Android使用Xutil3.0下载文件.md

新建项目:

引入依赖:

 implementation 'org.xutils:xutils:3.5.0'

添加权限:

  <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

修改文件:

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />


    <Button
        android:id="@+id/xiazai"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="下载测试按钮"
        />

    <ProgressBar
        android:id="@+id/prg"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        style="@style/Base.Widget.AppCompat.ProgressBar.Horizontal"
        />


</LinearLayout>

MainActivity:

package com.example.administrator.xutilstest;

import android.media.SoundPool;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.Toast;

import org.xutils.common.Callback;
import org.xutils.ex.HttpException;
import org.xutils.http.RequestParams;
import org.xutils.x;

import java.io.File;

public class MainActivity extends AppCompatActivity {

    private ProgressBar progressBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        progressBar  = findViewById(R.id.prg);

        x.Ext.init(getApplication());
        x.Ext.setDebug(BuildConfig.DEBUG); // 是否输出debug日志, 开启debug会影响性能.


        Button button = findViewById(R.id.xiazai);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String url = "http://localhost:8080/gh.zip";

                RequestParams params = new RequestParams(url);


                // 默认缓存存活时间, 单位:毫秒（如果服务器没有返回有效的max-age或Expires则参考）
                params.setCacheMaxAge(1000 * 60);

                x.http().get(params, new Callback.ProgressCallback<File>() {
                    @Override
                    public void onSuccess(File result) {
                        System.out.println("下载成功");
                    }

                    @Override
                    public void onError(Throwable ex, boolean isOnCallback) {

                    }

                    @Override
                    public void onCancelled(CancelledException cex) {

                    }

                    @Override
                    public void onFinished() {

                    }

                    private boolean hasError = false;
                    private String result = null;
                    @Override
                    public void onWaiting() {

                    }

                    @Override
                    public void onStarted() {

                        System.out.println("开始下载");
                    }

                    @Override
                    public void onLoading(long total, long current, boolean isDownloading) {
                        progressBar.setMax((int) total);
                        progressBar.setProgress((int) current);

                    }

                });
            }
        });
    }
}