I developed a website for my entreprisee and I work almost exclusively with PHP
So the Java language (and android studio) is a really new for me
Despite this I have to create an APK to use the website (in order to block the android home on this site)
For the moment I managed to set up refresh pages, and now I am trying to add a progress/loading bar to my application that uses WebView but it doesn't work ..
MainActivity.java
import android.support.v4.widget.SwipeRefreshLayout;
import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class MainActivity extends Activity {
WebView webView;
SwipeRefreshLayout swipe;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
swipe = (SwipeRefreshLayout) findViewById(R.id.swipe);
swipe.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
webView.reload();
}
});
LoadWeb();
}
public void LoadWeb(){
webView = (WebView) findViewById(R.id.webView);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setAppCacheEnabled(true);
webView.loadUrl("https://www.google.com/");
swipe.setRefreshing(true);
webView.setWebViewClient(new WebViewClient(){
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
webView.loadUrl("file:///android_asset/error.html");
}
public void onLoadResource(WebView view, String url) { //Doesn't work
swipe.setRefreshing(true);
}
public void onPageFinished(WebView view, String url){
//Hide the SwipeReefreshLayout
swipe.setRefreshing(false);
}
});
}
@Override
public void onBackPressed(){
if (webView.canGoBack()){
webView.goBack();
}else {
finish();
}
}
}
Activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
tools:context="eu.test.testappli.MainActivity">
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/swipe"
android:layout_width="match_parent"
android:layout_height="match_parent">
<WebView
android:id="@+id/webView"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.v4.widget.SwipeRefreshLayout>
</android.support.constraint.ConstraintLayout>
It may seem simple, but the java remains obscure for me so I can not implement the pieces of code that I find on the web ..
I read about how to increase performance of WebView by implementing Caching web resources like JS, CSS and image files. You can also static resources in your native application, and by intercepting the Resource requests you can override the default behaviour of WebView.
Android ProgressBar is a graphical view indicator that shows some progress. Android progress bar displays a bar representing the completing of the task. Progress bar in android is useful since it gives the user an idea of time to finish its task.
Android Progress Dialog is a UI which shows the progress of a task like you want user to wait until the previous lined up task is completed and for that purpose you can use progress dialog. The best example is you see when downloading or uploading any file.
Try this i have make some changes in your code
import android.support.v4.widget.SwipeRefreshLayout;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;
import android.support.v7.widget.Toolbar;
public class Main2Activity extends AppCompatActivity {
WebView webView;
SwipeRefreshLayout swipe;
ProgressBar progressBar;
Toolbar toolbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
progressBar = (ProgressBar) findViewById(R.id.awv_progressBar);
swipe = (SwipeRefreshLayout) findViewById(R.id.swipe);
LoadWeb();
progressBar.setMax(100);
progressBar.setProgress(1);
swipe = (SwipeRefreshLayout) findViewById(R.id.swipe);
swipe.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
webView.reload();
}
});
webView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
progressBar.setProgress(progress);
}
});
webView.setWebViewClient(new WebViewClient() {
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
progressBar.setVisibility(View.VISIBLE);
}
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
webView.loadUrl("file:///android_asset/error.html");
}
public void onLoadResource(WebView view, String url) { //Doesn't work
//swipe.setRefreshing(true);
}
public void onPageFinished(WebView view, String url) {
//Hide the SwipeReefreshLayout
progressBar.setVisibility(View.GONE);
swipe.setRefreshing(false);
}
});
}
public void LoadWeb() {
webView = (WebView) findViewById(R.id.webView);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setAppCacheEnabled(true);
webView.loadUrl("https://www.google.com/");
swipe.setRefreshing(true);
}
@Override
public void onBackPressed() {
if (webView.canGoBack()) {
webView.goBack();
} else {
finish();
}
}
}
XML.LAYOUT
<?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:id="@+id/rel_parent"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".Main2Activity">
<ProgressBar
android:id="@+id/awv_progressBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="15dp"
android:layout_marginTop="7dp"
android:indeterminate="true" />
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/swipe"
android:layout_width="match_parent"
android:layout_height="match_parent">
<WebView
android:id="@+id/webView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.v4.widget.SwipeRefreshLayout>
</LinearLayout>
add this theme to your activity
<style name="AppTheme3" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
OUTPUT
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