android文件下载器（轻量级）——EasyFileDownload

EasyFileDownloader

一个用于android中的轻量级文件下载器，特别适合应用内升级下载APK。
A lightweight for use in the android file downloader Download the APK is especially suitable for application in upgrade

https://github.com/lijunhuayc/EasyFileDownloader

Usage

version 1.1.1

1、add the followings to your build.gradle file

compile 'com.lijunhuayc.downloader:easyfiledownloader:1.1.1'

2、Using the library is really simple, just look at the source code of the provided sample.

public class MainActivity extends Activity implements View.OnClickListener {
    private EditText downloadpathText;
    private TextView resultView;
    private TextView startBt;
    private TextView stopBt;
    private ProgressBar progressBar;
    private Context context;
    WolfDownloader wolfDownloader;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        context = this;

        downloadpathText = (EditText) this.findViewById(R.id.path);
//        downloadpathText.setText("http://221.236.21.155/imtt.dd.qq.com/16891/5C119BDFA17906E5D6F45BDF932460BB.apk?mkey=57d63b47fb8efb5e&f=3580&c=0&fsname=com.shangyi.postop.paitent.android_4.2.0.0_18.apk&hsr=4d5s&p=.apk");
//        downloadpathText.setText("https://dl.google.com/dl/android/studio/install/2.2.0.12/android-studio-ide-145.3276617-windows.exe");
        downloadpathText.setText("http://xmp.down.sandai.net/kankan/XMPSetup_5.2.3.4962.exe");
        progressBar = (ProgressBar) this.findViewById(R.id.downloadbar);
        resultView = (TextView) this.findViewById(R.id.resultView);

        startBt = (TextView) findViewById(R.id.startBt);
        stopBt = (TextView) findViewById(R.id.stopBt);
        startBt.setOnClickListener(this);
        stopBt.setOnClickListener(this);

        String path = downloadpathText.getText().toString();
        File saveDir = null;
        System.out.println(Environment.getExternalStorageState() + "------" + Environment.MEDIA_MOUNTED);
        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {//开始下载文件
            saveDir = Environment.getExternalStorageDirectory();
        } else {
            Toast.makeText(MainActivity.this, "SDCard不存在或者写保护", Toast.LENGTH_SHORT).show();
        }

        wolfDownloader = new DownloaderConfig()
                .setThreadNum(3)
                .setDownloadUrl(path)
                .setSaveDir(saveDir)
                .addDownloadListener(new DownloadProgressListener() {
                    @Override
                    public void onDownloadTotalSize(int totalSize) {
                        progressBar.setMax(totalSize);//设置进度条的最大刻度为文件的长度
                    }

                    @Override
                    public void updateDownloadProgress(int size, float percent, float speed) {
                        resultView.setText(getFormatStr(size, percent, speed));
                        progressBar.setProgress(size);
                    }

                    @Override
                    public void onDownloadSuccess(String apkPath) {
                        Toast.makeText(MainActivity.this, "下载成功\n" + apkPath, Toast.LENGTH_SHORT).show();
                        startBt.setText("开始");
                        stopBt.setVisibility(View.GONE);
                    }

                    @Override
                    public void onDownloadFailed() {
                        Toast.makeText(MainActivity.this, "下载失败", Toast.LENGTH_SHORT).show();
                        startBt.setText("开始");
                    }

                    @Override
                    public void onPauseDownload() {
                        Toast.makeText(MainActivity.this, "下载暂停", Toast.LENGTH_SHORT).show();
                    }

                    @Override
                    public void onStopDownload() {
                        Toast.makeText(MainActivity.this, "下载停止", Toast.LENGTH_SHORT).show();
                        startBt.setText("开始");
                        stopBt.setVisibility(View.GONE);
                    }
                })
                .buildWolf(context);


        wolfDownloader.readHistory(new HistoryCallback() {
            @Override
            public void onReadHistory(int downloadLength, int fileSize) {
                if (fileSize != 0) {
                    progressBar.setMax(fileSize);
                    progressBar.setProgress(downloadLength);
                    resultView.setText(getFormatStr(downloadLength, FileDownloader.calculatePercent(downloadLength, fileSize), 0));
                }
            }
        });
    }

    private String getFormatStr(int size, float percent, float speed) {
        StringBuilder sBuilder = new StringBuilder();
        sBuilder.append("  ").append(FileDownloader.formatSpeed(speed));
        sBuilder.append("  ").append(String.valueOf(percent + "%"));
        sBuilder.append("  ").append(FileDownloader.formatSize(size)).append("/")
                .append(FileDownloader.formatSize(progressBar.getMax()));
        return sBuilder.toString();
    }

    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.startBt:
                switch (startBt.getText().toString()) {
                    case "开始":
                        wolfDownloader.startDownload();
                        startBt.setText("暂停");
                        stopBt.setVisibility(View.VISIBLE);
                        break;
                    case "继续":
                        wolfDownloader.restartDownload();
                        startBt.setText("暂停");
                        break;
                    case "暂停":
                        wolfDownloader.pauseDownload();
                        startBt.setText("继续");
                        break;
                }
                break;
            case R.id.stopBt:
                wolfDownloader.stopDownload();
                break;
        }
    }

    @Override
    public void onBackPressed() {
        Process.killProcess(Process.myPid());
        super.onBackPressed();
    }
}

version 1.0.3

1、add the followings to your build.gradle file

compile 'com.lijunhuayc.downloader:easyfiledownloader:1.0.3'

2、Using the library is really simple, just look at the source code of the provided sample.

WolfDownloader wolfDownloader = new WolfDownloader(context)
                    .setThreadNum(3)
                    .setDownloadUrl(path)
                    .setSaveDir(Environment.getExternalStorageDirectory())
                    .addDownloadListener(new DownloadProgressListener() {
                        @Override
                        public void onDownloadTotalSize(int totalSize) {
                            progressBar.setMax(totalSize);//设置进度条的最大刻度为文件的长度
                        }

                        @Override
                        public void updateDownloadProgress(int size, float percent, float speed) {
                            StringBuilder sBuilder = new StringBuilder();
                            sBuilder.append("  ").append(FileDownloader.formatSpeed(speed));
                            sBuilder.append("  ").append(String.valueOf(percent + "%"));
                            sBuilder.append("  ").append(FileDownloader.formatSize(size)).append("/")
                                    .append(FileDownloader.formatSize(progressBar.getMax()));
                            resultView.setText(sBuilder.toString());
                            progressBar.setProgress(size);

                        }

                        @Override
                        public void onDownloadSuccess(String apkPath) {
                            Toast.makeText(MainActivity.this, "下载成功\n" + apkPath, Toast.LENGTH_SHORT).show();
                        }

                        @Override
                        public void onDownloadFailed() {
                            Toast.makeText(MainActivity.this, "下载失败", Toast.LENGTH_SHORT).show();
                        }

                        @Override
                        public void onPauseDownload() {

                        }

                        @Override
                        public void onStopDownload() {

                        }
                    });
            wolfDownloader.startDownload();

    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.startBt:
                startDownload();
                break;
            case R.id.pauseBt:
                wolfDownloader.pauseDownload();
                break;
            case R.id.continueBt:
                wolfDownloader.restartDownload();
                break;
            case R.id.stopBt:
                wolfDownloader.stopDownload();
                break;
        }
    }

License

Copyright 2016 lijunhuayc

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.