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Enabling Immersive Mode from JavaScript Event on WebView
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/***************************************************************************** | |
* Put <uses-permission android:name="android.permission.INTERNET" /> in AndroidManifest.xml | |
* and <WebView android:id="@+id/webview" android:layout_width="match_parent" android:layout_height="match_parent"/> in activity_main.xml | |
****************************************************************************/ | |
package com.hkitago.enablingImmersiveMode | |
import android.annotation.SuppressLint | |
import android.app.Activity | |
import android.os.Build | |
import android.os.Bundle | |
import android.os.Handler | |
import android.view.View | |
import android.view.WindowInsets | |
import android.view.WindowInsetsController | |
import android.view.WindowManager | |
import android.webkit.WebView | |
class MainActivity : Activity() { | |
private lateinit var webView: WebView | |
@SuppressLint("SetJavaScriptEnabled") | |
override fun onCreate(savedInstanceState: Bundle?) { | |
super.onCreate(savedInstanceState) | |
setContentView(R.layout.activity_main) | |
webView = findViewById(R.id.webview) | |
webView.webViewClient = object : WebViewClient() { | |
override fun shouldOverrideUrlLoading(view: WebView?, url: String?): Boolean { | |
view?.loadUrl(url) | |
return true | |
} | |
} | |
webView.settings.javaScriptEnabled = true | |
webView.addJavascriptInterface(WebViewJavaScriptInterface(), "app") | |
webView.loadUrl("file:///android_asset/index.html") | |
} | |
override fun onWindowFocusChanged(hasFocus: Boolean) { | |
super.onWindowFocusChanged(hasFocus) | |
if (hasFocus) hideSystemUI() | |
} | |
private fun hideSystemUI() { | |
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) { | |
window.attributes.layoutInDisplayCutoutMode = WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES | |
} | |
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) { | |
window.setDecorFitsSystemWindows(false) | |
window.insetsController?.apply { | |
hide(WindowInsets.Type.statusBars() or WindowInsets.Type.navigationBars()) | |
systemBarsBehavior = WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE | |
} | |
} else { | |
@Suppress("DEPRECATION") | |
window.decorView.systemUiVisibility = (View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY | |
or View.SYSTEM_UI_FLAG_LAYOUT_STABLE | |
or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION | |
or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | |
or View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | |
or View.SYSTEM_UI_FLAG_FULLSCREEN) | |
} | |
} | |
inner class WebViewJavaScriptInterface { | |
var handler = Handler() | |
@JavascriptInterface | |
fun enableImmersiveMode() { | |
handler.postDelayed({ hideSystemUI() }, 0) | |
} | |
} | |
} | |
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