Downloads

package com.example.worldflags; import android.app.AlertDialog; import android.content.Intent; import android.content.res.Configuration; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import androidx.annotation.NonNull; import androidx.appcompat.app.AppCompatActivity; import androidx.core.graphics.Insets; import androidx.core.view.ViewCompat; import androidx.core.view.WindowInsetsCompat; import android.os.Looper; import android.view.View; import android.webkit.WebResourceError; import android.webkit.WebResourceRequest; import android.webkit.WebResourceResponse; import android.webkit.WebSettings; import android.webkit.WebView; import android.webkit.WebViewClient; import androidx.activity.OnBackPressedCallback; import android.webkit.JavascriptInterface; import android.widget.ProgressBar; public class MainActivity extends AppCompatActivity { private String rolling = "0"; // Rolling Display private WebView mywebView; private ProgressBar progressBar; private final Handler myHandler = new Handler(Looper.getMainLooper()); // Handler to receive update UI message private final Runnable updateUI = () -> { // Update the UI to keep screen on in Rolling Display Mode screenOn(rolling.equals("1")); }; private void screenOn(boolean keep) { mywebView.setKeepScreenOn(keep); mywebView.invalidate(); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) -> { Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars()); v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom); return insets; }); getOnBackPressedDispatcher().addCallback(this, new OnBackPressedCallback(true) { @Override public void handleOnBackPressed() { // Ensure screen doesn't stay on screenOn(false); if (mywebView.canGoBack()) { mywebView.goBack(); } else { finish(); } } }); mywebView = findViewById(R.id.webview); progressBar = findViewById(R.id.progressBar); mywebView.setWebViewClient(new WebViewClient() { // Override default error messages @Override public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) { view.loadUrl("about:blank"); showErrorDlg(); } @Override public void onReceivedHttpError(final WebView view, final WebResourceRequest request, WebResourceResponse errorResponse) { view.loadUrl("about:blank"); showErrorDlg(); } @Override public void onPageFinished(WebView view, String url) { progressBar.setVisibility(View.GONE); super.onPageFinished(view, url); } }); WebSettings webSettings = mywebView.getSettings(); webSettings.setCacheMode(WebSettings.LOAD_DEFAULT); webSettings.setJavaScriptEnabled(true); // Enable DOM storage API for localStorage webSettings.setDomStorageEnabled(true); // Enable pinch zoom webSettings.setBuiltInZoomControls(true); webSettings.setUseWideViewPort(true); webSettings.setDisplayZoomControls((false)); webSettings.setSupportZoom(true); mywebView.addJavascriptInterface(new WebAppInterface(), "AndroidInterface"); */ mywebView.loadUrl("https://coeoperations.com/wf/wf.html"); } // Prevent WebView reloading on orientation change - also requires // android:configChanges="orientation|screenSize" in AndroidManifest.xml @Override public void onConfigurationChanged(@NonNull Configuration newConfig) { super.onConfigurationChanged(newConfig); } @Override protected void onPause() { // Ensure screen doesn't stay on screenOn(false); super.onPause(); } @Override protected void onResume() { // App coming to foreground screenOn(rolling.equals("1")); super.onResume(); } public class WebAppInterface { @JavascriptInterface public void postMessage(String message) { // Message from JavaScript... if (message.equals("0") || message.equals("1")) { //... with updated Display Mode - needs posting to UI thread rolling = message; myHandler.post(updateUI); } else if (!message.isBlank()) { //... with URL Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(message)); startActivity(browserIntent); } } } public void showErrorDlg() { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("World Flags") .setIcon(R.drawable.ic_launcher_foreground) .setMessage("Network Error. Please check your Internet connection.") .setCancelable(false) .setNegativeButton("OK", (dialog, id) -> { dialog.cancel(); finish(); }); AlertDialog alert = builder.create(); progressBar.setVisibility(View.GONE); alert.show(); } }