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This article is about how Android uses Xutils3 for breakpoint downloads. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Using tools: Android studio 3.0

How to use it:

One: add dependency in build.gradle (Module:app)

Implementaion 'org.xutils:xutils:3.5.1'

Second: create a separate MyApp class to initialize xutils. The class name can be customized.

Public class MyApp extends Application {@ Override public void onCreate () {super.onCreate (); x.Ext.init (this);}}

Three: add permissions to AndroidManifest and register MyApp

/ / add permissions / / register MyApp

Add android:name= ".MyApp'to the node

Four: use the download method

Public void download (View view) {String path=et.getText (). ToString (). Trim (); RequestParams params=new RequestParams (path); params.setSaveFilePath (Environment.getExternalStorageDirectory () + "/ myapp/"); params.setAutoRename (true) X.http () .post (params,new Callback.ProgressCallback () {@ Override public void onWaiting () {} @ Override public void onStarted () {} @ Override public void onLoading (long total, long current, boolean isDownloading) {pd.setMax ((int) total); pd.setProgress ((int) current) } @ Override public void onSuccess (File result) {Log.i ("TEST", "download completed");} @ Override public void onError (Throwable ex, boolean isOnCallback) {} @ Override public void onCancelled (CancelledException cex) {} @ Override public void onFinished () {}});}

Knowledge point expansion:

Introduction to xUtils3

XUtils includes orm, http (s), image, and view annotations, but it is still lightweight (246k) and has powerful features that make it easy to extend:

The cornerstone of stability: AbsTask and unified callback interface Callback. Any exception, even if there is an exception in your callback method implementation, will enter onError. In any case, onFinished will let you know that the task is over. Based on the efficient and stable orm tools, the http module can more easily support cookie (supporting domain, path, expiry, etc.) and cache (supporting Cache-Control, Last-Modified, ETag, etc.). With powerful support for http and its download cache, the implementation of the image module is quite simple, and supports recycling images held by view but removed by Mem Cache, reducing flicker during page fallback. The view annotation module flexibly supports all kinds of View injection and event binding, including listener with more methods.

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