Develop a file loading app as shown below: User enters URL in an EditText. On the...

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Exercise 2: Develop a file loading app as shown below: User enters URL in an EditText On the on click listener of the load bu

Develop a file loading app as shown below:

User enters URL in an EditText. On the on click listener of the load button, url’s data should be read into a html file in a separate thread as an asynchronous task. Display a progress bar too. On the post execute method, display done text in a text view.

On the click of Display button, data that’s stored in html file gets retrieved and displayed in text view.

USING ANDRIOD STUDIO / JAVA

engineering Computer-Science

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Answer 1

Answer #1

actually i have made the same project before i have complete source code i m uploading here you can copy paste this code easily from here below is the code ---------------------------------------------------------------------------------------------------------------

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.web_view_demo"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk

android:minSdkVersion="8"

android:targetSdkVersion="22" />

<uses-permission android:name="android.permission.INTERNET" />

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

<application

android:allowBackup="true"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme" >

<activity

android:name=".WebActivity"

android:theme="@android:style/Theme.NoTitleBar" >

</activity>

<activity

android:name="com.web_view_demo.MainActivity"

android:label="@string/app_name" >

<intent-filter>

</intent-filter>

</activity>

</application>

</manifest>

-----------------------------------------------------------activity_main.xml file :---------------------------------------------------------------------------

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical" >

<TextView

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:gravity="center"

android:padding="10dp"

android:text="@string/text"

android:textColor="#0587d9"

android:textSize="18sp"

android:textStyle="bold" />

<EditText

android:id="@+id/url"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_marginLeft="5dp"

android:layout_marginRight="5dp"

android:gravity="center"

android:hint="@string/enter_url"

android:inputType="textUri"

android:padding="10dp"

android:singleLine="true"

android:textColor="#000000"

android:textSize="15sp" />

<Button

android:id="@+id/open_url"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:gravity="center"

android:padding="5dp"

android:text="@string/open_url"

android:textSize="15sp" />

<WebView

android:id="@+id/webview"

android:layout_width="fill_parent"

android:layout_height="fill_parent" />

</LinearLayout>

------------------------------------------------------------------ MainActivity.java--------------------------------------------------------------------------

package com.web_view_demo;

import android.app.ProgressDialog;

import android.content.Context;

import android.net.ConnectivityManager;

import android.net.NetworkInfo;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.util.Patterns;

import android.view.View;

import android.view.View.OnClickListener;

import android.webkit.WebView;

import android.webkit.WebViewClient;

import android.widget.EditText;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

private static WebView web;

private static ProgressDialog dialog;

private static EditText enter_url;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

web = (WebView) findViewById(R.id.webview);

enter_url = (EditText) findViewById(R.id.url);

// Implement click listener over button

findViewById(R.id.open_url).setOnClickListener(new OnClickListener() {

@Override

public void onClick(View arg0) {

String url = enter_url.getText().toString();// Get editext text

// into string

// Check if string url is not null

if (url.equals("") || url.length() == 0)

// If null then display toast

Toast.makeText(MainActivity.this, "Please enter a url.",

Toast.LENGTH_SHORT).show();

else if // Check if entered url is valid or not and if it is not

// valid then show toast

(!Patterns.WEB_URL.matcher(url).matches())

Toast.makeText(MainActivity.this,

"Entered URL is not Valid.", Toast.LENGTH_SHORT)

.show();

else {

// Check if interent is there or not

if (isConnectingToInternet())

// if both above conditions falls then load url

loadUrl(url);

else

Toast.makeText(MainActivity.this,

"There is no Interent connection.",

Toast.LENGTH_SHORT).show();

}

});

}

// Load url method in webview

private void loadUrl(String url) {

// Progressdialog to show when url is loading

dialog = new ProgressDialog(MainActivity.this);

dialog.setMessage("Please wait..nWhile loading URL");

dialog.setCancelable(true);// Make it cancelable true so that user can

// dismiss it anytime

web.setWebViewClient(new WebViewClient() {

@Override

public void onPageFinished(WebView view, String url) {

// On page finished loading dismiss dialog

if (dialog.isShowing()) {

dialog.dismiss();

}

});

dialog.show();// Show dialog

web.loadUrl(url);// Load url into webview

web.getSettings().setJavaScriptEnabled(true);// Enable javascript

}

// Return status of internet connection

private boolean isConnectingToInternet() {

ConnectivityManager connectivity = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

if (connectivity != null) {

NetworkInfo[] info = connectivity.getAllNetworkInfo();

if (info != null)

for (int i = 0; i < info.length; i++)

if (info[i].getState() == NetworkInfo.State.CONNECTED) {

return true;

}

return false;

}

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