I created my new webapp. It worked well. But I wanted to add a progress bar. The progress bar works, but my webview doesn't show anynore. I don't understand why. Can someone may help, please?
I tried all the codes I found online. They are ok for the others, but not for me.
Here my manifest file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:allowBackup="true"
android:fullBackupOnly="true"
android:icon="@drawable/donorionepng"
android:label="PCDO GENOVA"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.PCDOPCDOGENOVA"
android:usesCleartextTraffic="true">
<activity
android:name=".MainActivity" android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
android:exported="true"/>
<activity
android:name=".SplashActivity" android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
android:exported="true" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Here my MainActivity.java
package it.donorionegenova.pcdopcdogenova;
import androidx.appcompat.app.AppCompatActivity;
import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
import android.content.pm.ActivityInfo;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.view.KeyEvent;
import android.view.View;
import android.webkit.ClientCertRequest;
import android.webkit.WebChromeClient;
import android.webkit.WebResourceRequest;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;
import androidx.core.content.res.ResourcesCompat;
import com.onesignal.OneSignal;
import android.annotation.SuppressLint;
public class MainActivity extends AppCompatActivity {
private static final String ONESIGNAL_APP_ID = "........ de2";
private SwipeRefreshLayout swipeRefreshLayout;
private WebView webView;
ProgressBar progressBar;
@SuppressLint("SetJavaScriptEnabled")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ProgressBar progressBar = findViewById(R.id.prBar);
webView = findViewById(R.id.webView);
webView.getSettings().setJavaScriptEnabled(true);
webView.loadUrl("https://www.donorione-genova.it/home-app");
webView.setWebViewClient(new WebViewClient());
webView.setWebChromeClient(new WebChromeClient() {
@Override
public void onProgressChanged(WebView view, int newProgress) {
super.onProgressChanged(view, newProgress);
progressBar.setProgress(newProgress);
if (newProgress == 100) {
webView.setVisibility(View.VISIBLE);
progressBar.setVisibility(View.GONE);
} else {
webView.setVisibility(View.GONE);
progressBar.setVisibility(View.VISIBLE);
}
}
});
TextView textView = findViewById(R.id.textview);
textView.postDelayed(() -> textView.setText("loading..."), 500); // delay of 2 seconds before setting a text to textView
textView.postDelayed(() -> textView.setVisibility(View.GONE), 2000);
// Enable verbose OneSignal logging to debug issues if needed.
OneSignal.setLogLevel(OneSignal.LOG_LEVEL.VERBOSE, OneSignal.LOG_LEVEL.NONE);
// OneSignal Initialization
OneSignal.initWithContext(this);
OneSignal.setAppId(ONESIGNAL_APP_ID);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR);
WebSettings settings = webView.getSettings();
settings.setJavaScriptEnabled(true);
settings.setDisplayZoomControls(false);
settings.supportZoom();
settings.setSupportZoom(true);
settings.setBuiltInZoomControls(true);
// settings.setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
settings.setLoadWithOverviewMode(true);
settings.setUseWideViewPort(true);
settings.setDomStorageEnabled(true);
settings.setLoadsImagesAutomatically(true);
webView.clearHistory();
webView.clearCache(true);
registerForContextMenu(webView);
webView = findViewById(R.id.webView);
webView.getSettings().setJavaScriptEnabled(true);
webView.loadUrl("https://www.donorione-genova.it/home-app");
webView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView View, WebResourceRequest request) {
final Uri uri = request.getUrl();
if (uri.toString().startsWith("mailto:")) {
//Handle mail Urls
startActivity(new Intent(Intent.ACTION_SENDTO, uri));
} else if (uri.toString().startsWith("tel:")) {
//Handle telephony Urls
startActivity(new Intent(Intent.ACTION_DIAL, uri));
} else {
//Handle Web Urls
webView.loadUrl(uri.toString());
}
return true;
}
});
//per fare il refresh
swipeRefreshLayout = findViewById(R.id.swipe);
swipeRefreshLayout.setOnRefreshListener(() -> {
swipeRefreshLayout.setRefreshing(true);
new Handler().postDelayed(() -> {
swipeRefreshLayout.setRefreshing(false);
webView.reload();
}, 2000);
});
swipeRefreshLayout.setColorSchemeColors(
ResourcesCompat.getColor(
getResources(), R.color.holo_blue_dark, null),
ResourcesCompat.getColor(
getResources(), R.color.holo_orange_dark, null),
ResourcesCompat.getColor(
getResources(), R.color.holo_green_dark, null),
ResourcesCompat.getColor(
getResources(), R.color.holo_red_dark, null));
}
public void gohome(View v)
{
webView.loadUrl("https://donorione-genova.it/home-app");
}
public void clickexit(View v)
{
moveTaskToBack(true);
android.os.Process.killProcess(android.os.Process.myPid());
System.exit(1);
}
public void onBackPressed() {
if(webView.canGoBack()) {
webView.goBack();
}
else
super.onBackPressed();
}
}
And here my ActivityMain:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
android:id="@ id/swipe"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ProgressBar
android:id="@ id/prBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
style="?android:attr/progressBarStyleHorizontal" />
<WebView
android:id="@ id/webView"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:visibility="visible" >
</WebView>
</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
<Button
android:id="@ id/button"
android:layout_width="185dp"
android:layout_height="wrap_content"
android:background="#0063B1"
android:onClick="clickexit"
android:text="@string/Chiudi"
android:textColor="@color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_weight="1"
app:layout_constraintStart_toEndOf="@ id/button2">
</Button>
<Button
android:id="@ id/button2"
android:layout_width="185dp"
android:layout_height="wrap_content"
android:background="#0063B1"
android:onClick="gohome"
android:text="@string/Home"
android:textColor="@color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@ id/button"
app:layout_constraintHorizontal_weight="1"
app:layout_constraintStart_toStartOf="parent">
</Button>
<TextView
android:id="@ id/textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textColor="#0000ff"
android:textSize="40sp"
android:textAlignment="center"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent">
</TextView>
</androidx.constraintlayout.widget.ConstraintLayout>
CodePudding user response：
I didn't use SwipeRefreshLayout, but the documentation says you need to include another layout inside it. As you added a second view inside, you are now using it as a default ViewGroup, which is probably not working as expected. Put a LinearLayout or whatever inside the SwipeRefreshLayout and your components inside your LinearLayout.