I am trying to develop an app using HTML and JavaScript which uses camera. But when I export the app using android Studio, the app doesn't request the permission to access camera. So I allowed it manually. Then, it seems the camera worked, but still the problem is that the camera freezes and will continue to work only when I keep touching the screen.
Here is the codes:
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<uses-permission android:name="android.permission.CAMERA"/>
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<application
android:allowBackup="true"
android:dataExtractionRules="#xml/data_extraction_rules"
android:fullBackupContent="#xml/backup_rules"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/Theme.CameraTest"
tools:targetApi="31">
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<meta-data
android:name="android.app.lib_name"
android:value="" />
</activity>
</application>
</manifest>
MainActivity.java
package com.test.camera;
import androidx.appcompat.app.AppCompatActivity;
import android.Manifest;
import android.os.Build;
import android.os.Bundle;
import android.webkit.PermissionRequest;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebView webView=findViewById(R.id.webView);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setDatabaseEnabled(true);
webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
webView.getSettings().setDomStorageEnabled(true);
webView.getSettings().setMediaPlaybackRequiresUserGesture(false);
webView.setWebChromeClient(new WebChromeClient() {});
}
}
index.html
<html>
<head>
<title>Video</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
.fitter {
max-width: 100%;
height: auto;
}
</style>
</head>
<body>
<div id="camScrn" class="scrn">
<div id="title" style="position: fixed; left: 0px; top: 5px; width: 100%; text-align: center;">Top</div>
<div style="position: absolute; left: 0px; top: 0px;">
<video class="fitter" id="video" style="position: fixed; width: 100%; height: 100%"></video>
</div>
</div>
</body>
<script src="code.js"></script>
</html>
code.js
//Camera Setup
navigator.mediaDevices
.getUserMedia({ video: { width: parseInt(screen.height), height: parseInt(screen.width), facingMode: { exact: "environment" }}, audio: false})
.then((stream) => {
video.srcObject = stream;
video.play();
})
.catch((err) => {
console.error(`An error occurred: ${err}`);
});
I browsed a lot and tried all of it, but still it doesn't seem to work. Maybe it could be because I am just a beginner in Java.
Related
I am trying to apply animations to my project, when I set the interpolator to:
alpha.xml:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="#android:anim/bounce_interpolator">
<alpha android:fromAlpha="0"
android:toAlpha="1"
android:duration="4000"
/>
</set>
SplashActivity.java:
package com.example.animationtesting;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
import android.widget.TextView;
public class SplashActivity extends AppCompatActivity {
ImageView imageView;
TextView textView;
Animation alpha;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
imageView = findViewById(R.id.imageView);
textView = findViewById(R.id.textView);
alpha = AnimationUtils.loadAnimation(this,R.anim.alpha);
imageView.setAnimation(alpha);
textView.setAnimation(alpha);
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
Intent intent = new Intent(SplashActivity.this,MainActivity.class);
startActivity(intent);
finish();
}
},4000);
}
}
Android Manifest file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<application
android:allowBackup="true"
android:dataExtractionRules="#xml/data_extraction_rules"
android:fullBackupContent="#xml/backup_rules"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/Theme.AnimationTesting"
tools:targetApi="31">
<activity
android:name=".SplashActivity"
android:exported="true"
android:theme="#style/Theme.AppCompat.Light.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<meta-data
android:name="android.app.lib_name"
android:value="" />
</activity>
<activity
android:name=".MainActivity"
android:exported="true">
<meta-data
android:name="android.app.lib_name"
android:value="" />
</activity>
</application>
</manifest>
The code is working fine when I set the interpolator as bounce_interpolator, accelerate_interpolator, anticipate_overshoot_interpolator but when I set the interpolator to other options like fade_in, fade_out,slide_out_right my app crashes. I don't get why this is happening.
First I thought your app crashed because you try to put the animation on two different xml-objects, but then I replicated the entire thing using this guide and for me, everything is working. (Although I did it using Kotlin).
I'm sorry, the only solution I could provide was this URL to the guide, but if you have any more questions, feel free to ask!
I am trying to implement screen pinning on an Android 5.1 Device. I came across This Answer, and in trying to add a intent-filter to my Manifest, I get this error: Cannot resolve symbol '#xml/device_admin'.
I assume this is because xml/device_admin doesn't exist, so if this is the case, where do I create it?
My Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="MY_PACKAGE">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="android.app.action.PROFILE_PROVISIONING_COMPLETE" />
</intent-filter>
</activity>
<receiver
android:name=".MyDeviceAdminReceiver"
android:label="#string/app_name"
android:permission="android.permission.BIND_DEVICE_ADMIN">
<meta-data
android:name="android.app.device_admin"
android:resource="#xml/device_admin" />
<intent-filter>
<action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
</intent-filter>
</receiver>
<!-- <receiver android:name=".BootReceiver"> -->
<!-- <intent-filter > -->
<!-- <action android:name="android.intent.action.BOOT_COMPLETED"/> -->
<!-- </intent-filter> -->
<!-- </receiver> -->
</application>
</manifest>
My MainActivity
package MY_PACKAGE;
import android.content.ComponentName;
import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.app.admin.*;
public class MainActivity extends AppCompatActivity {
private WebView mWebView;
private static final String TAG = "MainActivity";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ComponentName deviceAdmin = new ComponentName(this, MyDeviceAdminReceiver.class);
DevicePolicyManager mDpm = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
mWebView = (WebView) findViewById(R.id.activity_main_webview);
// Enable Javascript
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
mWebView.setWebViewClient(new WebViewClient());
mWebView.loadUrl("my_website.com"); //Note that this is a placeholder website.
if (mDpm.isDeviceOwnerApp(getPackageName())) {
mDpm.setLockTaskPackages(deviceAdmin, new String[]{getPackageName()});
}
if (mDpm.isLockTaskPermitted(this.getPackageName()))
startLockTask();
// try {
// Runtime.getRuntime().exec("dpm set-device-owner MY_PACKAGE/.MyDeviceAdminReceiver");
// } catch (Exception e) {
// Log.e(TAG, "device owner not set");
// Log.e(TAG, e.toString());
// e.printStackTrace();
// }
try {
startLockTask();
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
public void onBackPressed() {
if(mWebView.canGoBack()) {
mWebView.goBack();
} else {
System.out.print("LOCKED IN PLACE!");
}
}
}
I assume this is because xml/device_admin doesn't exist, so if this is
the case, where do I create it?
Create Folder in hierarchy application/src/main/res/xml keep the file device_admin.xml in this XML folder
Structure of device_admin.xml file is
<device-admin xmlns:android="http://schemas.android.com/apk/res/android">
<uses-policies>
<limit-password />
<watch-login />
<reset-password />
<force-lock />
<wipe-data />
<expire-password />
<encrypted-storage />
<disable-camera />
</uses-policies>
</device-admin>
Device_admin GuideLine
I'm working on a mobile application that uses Webview to access a jQuery Mobile page, the problem is the Appcache is not saving my page, but it does save on browsers though, I've been searching for solutions, but none of them seemed to work in my case.
Any help is deeply appreciated!
Here's my Webview code:
package com.enlac.tasking;
import java.io.File;
import com.enlac.tasking.R;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebStorage;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class WebViewActivity extends Activity {
private WebView webView;
#SuppressWarnings("deprecation")
#SuppressLint("SetJavaScriptEnabled") public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.webview);
webView = (WebView) findViewById(R.id.webView1);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setDatabaseEnabled(true);
webView.getSettings().setDomStorageEnabled(true);
String sDataPath = this.getApplicationContext().getDir("database", Context.MODE_PRIVATE).getPath();
webView.getSettings().setDatabasePath(sDataPath);
webView.getSettings().setSavePassword(true);
webView.getSettings().setAllowContentAccess(true);
webView.getSettings().setAllowFileAccess(true);
File dir = getCacheDir();
if (!dir.exists()) {
dir.mkdirs();
}
webView.getSettings().setAppCachePath(dir.getPath());
webView.getSettings().setAppCacheEnabled(true);
webView.getSettings().setCacheMode(WebSettings.LOAD_DEFAULT);
webView.setWebViewClient(new Callback());
webView.setWebChromeClient(new webChromeClient());
webView.loadUrl("I removed the link because I don't have the rights to show some stuff on it");
}
private class Callback extends WebViewClient{
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return (false);
}
}
private class webChromeClient extends WebChromeClient
{
#SuppressWarnings("deprecation")
#Override
public void onExceededDatabaseQuota(String url, String databaseIdentifier, long currentQuota, long estimatedSize, long totalUsedQuota, WebStorage.QuotaUpdater quotaUpdater) {
quotaUpdater.updateQuota(50 * 1024 * 1024);
}
}
}
Android Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.enlac.tasking"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name="com.enlac.tasking.WebViewActivity"
android:theme="#android:style/Theme.NoTitleBar" />
<activity
android:label="#string/app_name"
android:name="com.enlac.tasking.MainActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
I'm trying to create my first app, the browser for android with this code already done, but needed to adapt to my necessity. I still do not know java, and the examples I find I can not make it work.
I need help and reading.
How can remove the titlebar and remain the browser in fullscreen?
for later viewing and interacting with my application in jquery mobile
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class AndroidMobileAppSampleActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
WebView mainWebView = (WebView) findViewById(R.id.mainWebView);
WebSettings webSettings = mainWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
mainWebView.setWebViewClient(new MyCustomWebViewClient());
mainWebView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
mainWebView.loadUrl("http://www.");
}
private class MyCustomWebViewClient extends WebViewClient {
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
}
//AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="tscolari.mobile_sample"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.INTERNET"/>
<application android:icon="#drawable/icon" android:label="#string/app_name">
<activity android:name=".AndroidMobileAppSampleActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
1 - in your layout, set the WebView to match_parent in both layout_width and layout_height
2 - in your code, add these lines:
super.onCreate(savedInstanceState);
// Hiding Title bar of this activity screen
getWindow().requestFeature(Window.FEATURE_NO_TITLE);
// Making this activity full screen
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.main);
in place of the existing
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
If your IDE is NOT SET to add the missing imports, just add the following line to your imports:
import android.view.Window;
import android.view.WindowManager;
update your manifeist like this :
only mentioning one thing:
android:theme="#android:style/Theme.NoTitleBar"
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="tscolari.mobile_sample"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.INTERNET"/>
<application android:icon="#drawable/icon" android:label="#string/app_name">
<activity android:name=".AndroidMobileAppSampleActivity"
android:label="#string/app_name"
android:theme="#android:style/Theme.NoTitleBar" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
I am very new to android, java and javascript coding.
I am trying to get my current GPS co-ordinates and display it on an Android device.
I am using webview and the majority of the code is written in javascript.
However, my code did not work as a blank white screen with error code 2 is shown when my application is deploy on my android device.
I have been looking through lots of websites and I am still unable to resolve this problem.
Any help please?
The codes for the various files are located below.
map.js
navigator.geolocation.watchPosition(
function(position){
var lat = position.coords.latitude;
var lng = position.coords.longitude;
document.getElementById("myPos").innerHTML = "lat："+lat+"<br>long："+lng;
},
function(error){
document.getElementById("myPos").innerHTML = "Error Code："+error.code;
}
);
setTimeout("window.scrollTo(0,1)", 10);
main.css
body {
width: 320px;
height:480px;
background-color : white;
}
#myMap {
position : absolute;
left : 0px;
top: 0px;
width: 320px;
height: 480px;
}
MainActivity.java
package com.example.midnightmap;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.webkit.GeolocationPermissions;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebView webView = (WebView)findViewById(R.id.webView);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setGeolocationEnabled(true);
webView.setWebChromeClient(new WebChromeClient() {
public void onGeolocationPermissionsShowPrompt(String origin, GeolocationPermissions.Callback callback) {
// callback.invoke(String origin, boolean allow, boolean remember);
callback.invoke(origin, true, false);
}
});
//webView.setWebChromeClient(new WebChromeClient());
webView.loadUrl("file:///android_asset/www/index.html");
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.midnightmap"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.midnightmap.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
I realised I left out this in my Manifest.xml file
My application worked after I add in
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />