在 WebView [Android Studio] [Java] 中允许麦克风访问(权限)
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【中文标题】在 WebView [Android Studio] [Java] 中允许麦克风访问(权限)【英文标题】:Allowing microphone access(permission) in WebView [Android Studio] [Java] 【发布时间】:2017-03-07 07:45:25 【问题描述】:我目前正在开发一个使用 html5 和 webview 来显示“应用程序”的音乐调谐器。我已经在清单中编写了所需的所有权限,我认为对于 webview 还需要另一个权限。
我现在使用这个https://jbergknoff.github.io/guitar-tuner/ 作为重定向页面示例
这是我的 manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.raynordev.projectrosin">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.MICROPHONE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-feature android:name="android.hardware.audio.low_latency" />
<uses-feature android:name="android.hardware.audio.pro" />
<uses-feature android:name="android.hardware.microphone" android:required="true"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".MainActivity"
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>
</activity>
<activity android:name="com.raynordev.projectrosin.HomeActivity">
</activity>
</application>
</manifest>
这是我的 .java
public class HomeActivity extends AppCompatActivity
private WebView wv;
private String TAG = "HomeActivity";
private static final int REQUEST_INTERNET = 200;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
WebView wv = (WebView) findViewById(R.id.webView);
wv.getSettings().setjavascriptEnabled(true);
wv.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
wv.setWebViewClient(new WebViewClient());
wv.setWebChromeClient(new WebChromeClient());
wv.loadUrl("https://jbergknoff.github.io/guitar-tuner/");
如果需要我提供更多信息,请告诉我。
谢谢大家!!
【问题讨论】:
【参考方案1】:<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
例子:
主活动
public class MainActivity extends AppCompatActivity
private static final int MY_PERMISSIONS_REQUEST_RECORD_AUDIO = 101;
private ActivityMainBinding mBinding;
private PermissionRequest myRequest;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState)
super.onCreate(savedInstanceState);
mBinding = DataBindingUtil.setContentView(this, R.layout.activity_main);
setWebView();
private void setWebView()
mBinding.webView.getSettings().setJavaScriptEnabled(true);
mBinding.webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
mBinding.webView.setWebViewClient(new WebViewClient());
mBinding.webView.getSettings().setSaveFormData(true);
mBinding.webView.getSettings().setSupportZoom(false);
mBinding.webView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
mBinding.webViemBinding.webView.getSettings().setPluginState(WebSettings.PluginState.ON);
mBinding.webView.setWebChromeClient(new WebChromeClient()
@Override
public void onPermissionRequest(final PermissionRequest request)
myRequest = request;
for (String permission : request.getResources())
switch (permission)
case "android.webkit.resource.AUDIO_CAPTURE":
askForPermission(request.getOrigin().toString(), Manifest.permission.RECORD_AUDIO, MY_PERMISSIONS_REQUEST_RECORD_AUDIO);
break;
);
mBinding.webView.loadUrl("<your url");
@Override
public void onBackPressed()
if (mBinding.webView.canGoBack())
mBinding.webView.goBack();
else
super.onBackPressed();
@Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults)
switch (requestCode)
case MY_PERMISSIONS_REQUEST_RECORD_AUDIO:
Log.d("WebView", "PERMISSION FOR AUDIO");
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED)
// permission was granted, yay! Do the
// contacts-related task you need to do.
myRequest.grant(myRequest.getResources());
mBinding.webView.loadUrl("<your url>");
else
// permission denied, boo! Disable the
// functionality that depends on this permission.
// other 'case' lines to check for other
// permissions this app might request
public void askForPermission(String origin, String permission, int requestCode)
Log.d("WebView", "inside askForPermission for" + origin + "with" + permission);
if (ContextCompat.checkSelfPermission(getApplicationContext(),
permission)
!= PackageManager.PERMISSION_GRANTED)
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this,
permission))
// Show an expanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
else
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(MainActivity.this,
new String[]permission,
requestCode);
else
myRequest.grant(myRequest.getResources());
Mainfest.xml:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.MICROPHONE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-feature android:name="android.hardware.audio.low_latency" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-feature android:name="android.hardware.audio.pro" />
<uses-feature android:name="android.hardware.microphone"/>
Build.gradle:
android
compileSdkVersion 26
defaultConfig
applicationId "myapp.example.com.myapplication"
minSdkVersion 21
targetSdkVersion 21
versionCode 1
versionName "1.0"
buildTypes
release
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
【讨论】:
为你的答案添加一些解释。 它可能没有任何解释,但它是唯一对我有用的。request.getResources()
在 api 级别 19 以下不可用。我们有什么解决方案吗?
总结一下,你需要以下组件:
MODIFY_AUDIO_SETTINGS
权限。
WebChromeClient
并监听 onPermissionRequest
的回调
在此回调中,检查request
对象中的资源,创建此request
对象的全局变量,迭代并在PermissionRequest
类中查找特定权限,例如。 PermissionRequest.RESOURCE_VIDEO_CAPTURE
转换为 Manifest.permission.CAMERA
权限,检查您的应用是否具有此权限,如果没有,请使用您希望的任何机制,如果是,请执行 4。
在权限回调中或者如果权限被授予,使用请求对象授予权限ex。 request.grant(new String[]PermissionRequest.RESOURCE_VIDEO_CAPTURE)
你很高兴。
sn-p:
webView.webChromeClient = object: WebChromeClient()
override fun onPermissionRequest(request: PermissionRequest?)
super.onPermissionRequest(request)
webkitPermissionRequest = request
request?.resources?.forEach
when(it)
PermissionRequest.RESOURCE_AUDIO_CAPTURE->
askForWebkitPermission(it, Manifest.permission.RECORD_AUDIO, REQUEST_CODE_PERMISSION_AUDIO)
PermissionRequest.RESOURCE_VIDEO_CAPTURE->
askForWebkitPermission(it, Manifest.permission.CAMERA, REQUEST_CODE_PERMISSION_CAMERA)
private fun askForWebkitPermission(webkitPermission: String, androidPermission: String, requestCode: Int)
val context = activity?: return
if (context.hasPermission(androidPermission))
webkitPermissionRequest!!.grant(arrayOf(webkitPermission))
else
requestPermissions(arrayOf(androidPermission), requestCode)
希望这会有所帮助。
Google 的相同示例:https://github.com/googlesamples/android-PermissionRequest
【讨论】:
为什么需要为请求创建全局变量?请求肯定是“通过引用”传递的,可以直接使用吗? 这是正确的答案,像这样的一些权限也需要通过 "webkitPermissionRequest!!.grant(arrayOf(webkitPermission))" 授予以上是关于在 WebView [Android Studio] [Java] 中允许麦克风访问(权限)的主要内容,如果未能解决你的问题,请参考以下文章
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