How to enable app cache for webview in android?

Android Mobile Development Apps/Applications

This example demonstrate about How to enable app cache for webview in android.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/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:gravity = "center"
   android:layout_height = "match_parent"
   tools:context = ".MainActivity"
   android:orientation = "vertical">
   <WebView
      android:id = "@+id/web_view"
      android:layout_width = "match_parent"
      android:layout_height = "match_parent" />
</LinearLayout>

In the above code, we have taken web view to show tutorialspoint.com.

Step 3 − Add the following code to src/MainActivity.java

package com.example.myapplication;
import android.app.ProgressDialog;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.RequiresApi;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.widget.EditText;
public class MainActivity extends AppCompatActivity {
   @RequiresApi(api = Build.VERSION_CODES.P)
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      final ProgressDialog progressDialog = new ProgressDialog(this);
      progressDialog.setMessage("Loading Data...");
      progressDialog.setCancelable(false);
      WebView web_view = findViewById(R.id.web_view);
      web_view.requestFocus();
      web_view.getSettings().setLightTouchEnabled(true);
      web_view.getSettings().setJavaScriptEnabled(true);
      web_view.getSettings().setGeolocationEnabled(true);
      web_view.setSoundEffectsEnabled(true);
      web_view.getSettings().setAppCacheEnabled(true);
      web_view.loadUrl("https://www.tutorialspoint.com/");
      web_view.setWebChromeClient(new WebChromeClient() {
         public void onProgressChanged(WebView view, int progress) {
            if (progress < 100) {
               progressDialog.show();
            }
            if (progress = = 100) {
               progressDialog.dismiss();
            }
         }
      });
   }
}

Step 4 − Add the following code to AndroidManifest.xml

<?xml version = "1.0" encoding = "utf-8"?>
<manifest xmlns:android = "http://schemas.android.com/apk/res/android"
   package = "com.example.myapplication">
   <uses-permission android:name = "android.permission.INTERNET"/>
   <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>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen –

Click here to download the project code

Vrundesha Joshi

Published on 27-Mar-2019 13:49:30

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