Android文件下载（FileDownloader）

Android

参考代码：

动态申请权限(Android 6.0以上需要)

在build.gradle(project)添加

maven { url "https://oss.sonatype.org/content/repositories/snapshots/" }

在build.gradle(app)添加

implementation 'com.liulishuo.filedownloader:library:1.7.5'

<?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">
    <ImageView
        android:id="@+id/image"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:layout_gravity="center"
        android:layout_marginTop="20dp"
        android:src="@mipmap/ic_launcher" />
    <SeekBar
        android:id="@+id/seekBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:padding="20dp" />
    <Button
        android:id="@+id/download"
        android:layout_margin="5dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#FF00FF"
        android:text="下载" />
</LinearLayout>

package com.zscdumin.myapplication;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Environment;
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.ImageView;
import android.widget.ProgressBar;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;
import com.liulishuo.filedownloader.BaseDownloadTask;
import com.liulishuo.filedownloader.FileDownloadListener;
import com.liulishuo.filedownloader.FileDownloader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.Date;
public class MainActivity extends AppCompatActivity {
    private ImageView imageView;
    private SeekBar seekBar;
    private Button button;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        FileDownloader.setup(this);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView = findViewById(R.id.image);
        seekBar = findViewById(R.id.seekBar);
        seekBar.setMax(100);
        final String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + new Date() + ".apk";
        button = findViewById(R.id.download);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                download(path);
            }
        });
    }
    public void download(final String path) {
        Log.i("TAG", "download");
        FileDownloader.getImpl().create("http://d1.music.126.net/dmusic/CloudMusic_official_5.4.1.284637.apk")
                .setPath(path)
                .setListener(new FileDownloadListener() {
                    @Override
                    protected void pending(BaseDownloadTask task, int soFarBytes, int totalBytes) {
                        Toast.makeText(MainActivity.this, "等待中。。。", Toast.LENGTH_SHORT).show();
                    }
                    @Override
                    protected void connected(BaseDownloadTask task, String etag, boolean isContinue, int soFarBytes, int totalBytes) {
                        Toast.makeText(MainActivity.this, "链接完成", Toast.LENGTH_SHORT).show();
                    }
                    @Override
                    protected void progress(BaseDownloadTask task, int soFarBytes, int totalBytes) {
                        seekBar.setProgress((int) ((1.0000 * soFarBytes / totalBytes) * 100));
                    }
                    @Override
                    protected void blockComplete(BaseDownloadTask task) {
                    }
                    @Override
                    protected void retry(final BaseDownloadTask task, final Throwable ex, final int retryingTimes, final int soFarBytes) {
                    }
                    @Override
                    protected void completed(BaseDownloadTask task) {
                        Toast.makeText(MainActivity.this, "下载完成", Toast.LENGTH_SHORT).show();
                        seekBar.setProgress(100);
//                      FileInputStream fis = null;
//                      try {
//                          fis = new FileInputStream(path);
//                      } catch (FileNotFoundException e) {
//                          e.printStackTrace();
//                      }
//                      Bitmap bitmap = BitmapFactory.decodeStream(fis);
//                      imageView.setImageBitmap(bitmap);
                    }
                    @Override
                    protected void paused(BaseDownloadTask task, int soFarBytes, int totalBytes) {
                    }
                    @Override
                    protected void error(BaseDownloadTask task, Throwable e) {
                        Toast.makeText(MainActivity.this, "下载出错", Toast.LENGTH_SHORT).show();
                    }
                    @Override
                    protected void warn(BaseDownloadTask task) {
                    }
                }).start();
    }
}