Downloading File From Android WebView
In this tutorial we will handle downloading files from WebView, we will also need Write_External_Storage permission to download files.
✓ Run-time Permission "WRITE_EXTERNAL_STORAGE" on devices >=Marshmallow.
✓ Download any file.
✓ Show download message/progress in notification.
✓ Show download message/progress in notification.
Step 1: Create a new project OR Open your project
Step 2: Code
AndroidManifest.xml<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.blogspot.devofandroid.myapplication"> <!--add internet permission--> <uses-permission android:name="android.permission.INTERNET"/> <!--add WRITE_EXTERNAL_STORAGE permsission for downloading--> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
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"> <WebView android:id="@+id/web_view" android:layout_width="match_parent" android:layout_height="match_parent" /> </LinearLayout>
MainActivity.java
package com.blogspot.devofandroid.myapplication; import android.Manifest; import android.app.DownloadManager; import android.content.pm.PackageManager; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.view.KeyEvent; import android.view.View; import android.webkit.CookieManager; import android.webkit.DownloadListener; import android.webkit.URLUtil; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.Button; import android.widget.EditText; import android.widget.ImageButton; import android.widget.Toast; public class MainActivity extends AppCompatActivity { WebView webView; String url = "https://drive.google.com/file/d/0B_rn9jkskDivX1dfZ3B3M2JVX2M/view?usp=drive_web"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //Runtime External storage permission for saving download files if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) { if (checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) { Log.d("permission", "permission denied to WRITE_EXTERNAL_STORAGE - requesting it"); String[] permissions = {Manifest.permission.WRITE_EXTERNAL_STORAGE}; requestPermissions(permissions, 1); } } webView = findViewById(R.id.web_view); webView.setWebViewClient(new WebViewClient()); webView.getSettings().setLoadsImagesAutomatically(true); webView.getSettings().setJavaScriptEnabled(true); webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY); webView.loadUrl(url); //handle downloading webView.setDownloadListener(new DownloadListener() { @Override public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimeType, long contentLength) { DownloadManager.Request request = new DownloadManager.Request( Uri.parse(url)); request.setMimeType(mimeType); String cookies = CookieManager.getInstance().getCookie(url); request.addRequestHeader("cookie", cookies); request.addRequestHeader("User-Agent", userAgent); request.setDescription("Downloading File..."); request.setTitle(URLUtil.guessFileName(url, contentDisposition, mimeType)); request.allowScanningByMediaScanner(); request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED); request.setDestinationInExternalPublicDir( Environment.DIRECTORY_DOWNLOADS, URLUtil.guessFileName( url, contentDisposition, mimeType)); DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE); dm.enqueue(request); Toast.makeText(getApplicationContext(), "Downloading File", Toast.LENGTH_LONG).show(); }}); } }
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