My App works totally fine until I added a new feature that checks internet connection availability and display an alert dialog box if internet isn't available. When I run my code in emulator without checking internet it works fine but when I use to verify internet connection using the same code as I provided below it show me a force close dialog with OK button I have tried all different solutions available on internet but nothing works for me. I am new to Android development and don't know though things but according to my research I am surely missing something in my code but unfortunately I am unable to figure it out.
Here is my Main Activity
package com.testapp.mytestapp;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.FrameLayout;
import java.io.File;
import static com.testapp.mytestapp.R.*;
public class MyActivity extends Activity {
private WebView webView;
private FrameLayout customViewContainer;
private WebChromeClient.CustomViewCallback customViewCallback;
private View mCustomView;
private myWebChromeClient mWebChromeClient;
private myWebViewClient mWebViewClient;
/**
* Called when the activity is first created.
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ConnectivityManager conMgr = (ConnectivityManager) getApplicationContext().getSystemService(this.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = conMgr.getActiveNetworkInfo();
if (netInfo == null || !netInfo.isConnected() || !netInfo.isAvailable()) {
AlertDialog alertDialog;
alertDialog = new AlertDialog.Builder(this, style.AlertDialogCustom).create();
alertDialog.setTitle("Communication Error");
alertDialog.setMessage("Please make sure that internet connection is active.");
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
finish();
}
});
alertDialog.show();
} else {
setContentView(R.layout.main);
AppRater appRater = new AppRater(this);
appRater.setDaysBeforePrompt(1);
appRater.setLaunchesBeforePrompt(3);
appRater.setPhrases("Rate This App",
"If you like our App don't forget to rate our application on Google Play. Thanks for your support!",
"Rate Now", "Later", "Ignore");
appRater.setTargetUri("https://play.google.com/store/apps/details?id=" + getApplicationContext().getPackageName());
appRater.show();
customViewContainer = (FrameLayout) findViewById(R.id.customViewContainer);
webView = (WebView) findViewById(R.id.webView);
mWebViewClient = new myWebViewClient();
webView.setWebViewClient(mWebViewClient);
mWebChromeClient = new myWebChromeClient();
webView.setWebChromeClient(mWebChromeClient);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setAppCacheEnabled(true);
webView.getSettings().setSaveFormData(true);
webView.loadUrl("https://custom-domain-name.com/test-page.html");
}
}
public boolean inCustomView() {
return (mCustomView != null);
}
public void hideCustomView() {
mWebChromeClient.onHideCustomView();
}
@Override
protected void onPause() {
super.onPause(); //To change body of overridden methods use File | Settings | File Templates.
webView.onPause();
}
@Override
protected void onResume() {
super.onResume(); //To change body of overridden methods use File | Settings | File Templates.
webView.onResume();
}
@Override
protected void onStop() {
super.onStop(); //To change body of overridden methods use File | Settings | File Templates.
if (inCustomView()) {
hideCustomView();
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
if (inCustomView()) {
hideCustomView();
return true;
}
if ((mCustomView == null) && webView.canGoBack()) {
webView.goBack();
return true;
}
}
return super.onKeyDown(keyCode, event);
}
class myWebChromeClient extends WebChromeClient {
private Bitmap mDefaultVideoPoster;
private View mVideoProgressView;
@Override
public void onShowCustomView(View view, int requestedOrientation, CustomViewCallback callback) {
onShowCustomView(view, callback); //To change body of overridden methods use File | Settings | File Templates.
}
@Override
public void onShowCustomView(View view,CustomViewCallback callback) {
// if a view already exists then immediately terminate the new one
if (mCustomView != null) {
callback.onCustomViewHidden();
return;
}
mCustomView = view;
webView.setVisibility(View.GONE);
customViewContainer.setVisibility(View.VISIBLE);
customViewContainer.addView(view);
customViewCallback = callback;
}
@Override
public View getVideoLoadingProgressView() {
if (mVideoProgressView == null) {
LayoutInflater inflater = LayoutInflater.from(MyActivity.this);
mVideoProgressView = inflater.inflate(R.layout.video_progress, null);
}
return mVideoProgressView;
}
@Override
public void onHideCustomView() {
super.onHideCustomView(); //To change body of overridden methods use File | Settings | File Templates.
if (mCustomView == null)
return;
webView.setVisibility(View.VISIBLE);
customViewContainer.setVisibility(View.GONE);
// Hide the custom view.
mCustomView.setVisibility(View.GONE);
// Remove the custom view from its container.
customViewContainer.removeView(mCustomView);
customViewCallback.onCustomViewHidden();
mCustomView = null;
}
}
class myWebViewClient extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(Uri.parse(url).getHost().endsWith("custom-domain-name.com")) {
return false;
}
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
view.getContext().startActivity(intent);
return true;
//return super.shouldOverrideUrlLoading(view, url); //To change body of overridden methods use File | Settings | File Templates.
}
}
@Override
protected void onDestroy() {
super.onDestroy();
try {
trimCache(); //if trimCache is static
} catch (Exception e) {
e.printStackTrace();
}
}
public void trimCache() {
try {
File dir = getCacheDir();
if (dir != null && dir.isDirectory()) {
deleteDir(dir);
}
} catch (Exception e) {
// TODO: handle exception
}
}
public static boolean deleteDir(File dir) {
if (dir != null && dir.isDirectory()) {
String[] children = dir.list();
for (int i = 0; i < children.length; i++) {
boolean success = deleteDir(new File(dir, children[i]));
if (!success) {
return false;
}
}
return dir.delete();
}
return false;
}
}
Here is my AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.testapp.mytestapp" >
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CLEAR_APP_CACHE"/>
<application android:label="@string/app_name" android:icon="@drawable/ic_launcher"
android:hardwareAccelerated="true">
<activity android:name=".MyActivity"
android:configChanges="orientation|keyboardHidden"
android:hardwareAccelerated="true"
android:label="@string/app_name"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
</manifest>
Here is my layout's main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<WebView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/webView"
android:layout_gravity="center"
/>
<FrameLayout
android:id="@+id/customViewContainer"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:visibility="gone"
/>
</LinearLayout>
Here is my layout's video_progress.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/progress_indicator"
android:orientation="vertical"
android:layout_centerInParent="true"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ProgressBar android:id="@android:id/progress"
style="?android:attr/progressBarStyleLarge"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView android:paddingTop="5dip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="loading"
android:textSize="14sp"
android:textColor="?android:attr/textColorPrimary"/>
</LinearLayout>
Here is my styles.xml
<resources>
<!-- Base application theme. -->
<color name="basic_blue1">#ffffff</color>
<color name="basic_blue2">#ffffff</color>
<color name="basic_blue3">#9954BB</color>
<color name="basic_orange1">#2780E3</color>
<color name="basic_orange2">#2780E3</color>
<color name="basic_white1">#eeffffff</color>
<color name="basic_white2">#99ffffff</color>
<style name="AlertDialogCustom" parent="@android:style/Theme.Holo">
<item name="android:layout_gravity">center</item>
<item name="android:textSize">22sp</item>
</style>
<style name="app_rater" parent="@android:style/Theme.Holo">
<item name="android:layout_gravity">center</item>
<item name="android:textSize">22sp</item>
</style>
</resources>
