Reprinted from

;http://blog.csdn.net/LosingCarryJie/article/details/77688064

Our App may provide users with scenarios to download files or pictures, and then you may consider the following terms

Multi task download
Multi thread Download
Breakpoint resume
High concurrence

Yes, if you download the library by hand, you need to consider these four terms. Next, let's learn about the FileDownloader library. The author of the library has encapsulated these four points very well. How can you miss the open source library of 5000 Star?

The old rule is that you must put other people's github address when quoting other people's Libraries
FileDownloader Github address

1 reference import

compile 'com.liulishuo.filedownloader:library:1.6.4'//See github for the latest version

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2 Global initialization

public class APP extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
       FileDownloader.setup(this);//Note that the init method is no longer recommended by the author
    }
}

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3 specific call

Note that the path here is the file name, not the folder name

Note that the path here is the file name, not the folder name

Note that the path here is the file name, not the folder name

 FileDownloader.getImpl().create(url).setWifiRequired(true).setPath(path).setListener(new FileDownloadListener() {
            @Override
            protected void pending(BaseDownloadTask task, int soFarBytes, int totalBytes) {

            }

            @Override
            protected void progress(BaseDownloadTask task, int soFarBytes, int totalBytes) {
                int percent=(int) ((double) soFarBytes / (double) totalBytes * 100);
                textView.setText("("+percent+"%"+")");
            }

            @Override
            protected void blockComplete(BaseDownloadTask task) {

            }

            @Override
            protected void completed(BaseDownloadTask task) {
                Toast.makeText(MainActivity.this,"Download complete!",Toast.LENGTH_SHORT).show();
                textView.setText("("+"100%"+")");
            }

            @Override
            protected void paused(BaseDownloadTask task, int soFarBytes, int totalBytes) {

            }

            @Override
            protected void error(BaseDownloadTask task, Throwable e) {

            }

            @Override
            protected void warn(BaseDownloadTask task) {
                continueDownLoad(task);//If the same task exists, continue downloading
            }
        }).start();

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 private void continueDownLoad(BaseDownloadTask task) {
        while (task.getSmallFileSoFarBytes()!=task.getSmallFileTotalBytes()){
            int percent=(int) ((double) task.getSmallFileSoFarBytes() / (double) task.getSmallFileTotalBytes() * 100);
            textView.setText("("+percent+"%"+")");
        }
    }

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Yes, it's so easy to use! This library is far more powerful than my demo. I just showed its basic usage. If you have your own special needs, please go to github and read the source code carefully~