在Android Studio上使用JavaScript时应用程序崩溃
我正在为我的项目创建一个应用程序，我在线使用了这个html、css和javascript，但当我在WebView中使用这个html文件时，它会运行，但一旦点击登录或注册按钮，应用程序就会崩溃 起初我认为这是我的设备的问题，但后来我尝试了几个设备，并使用干净的代码。 但到目前为止，这个问题仍然没有得到解决 这是我的MainActivity.java在Android Studio上使用JavaScript时应用程序崩溃,javascript,java,android,android-studio,webview,Javascript,Java,Android,Android Studio,Webview,我正在为我的项目创建一个应用程序，我在线使用了这个html、css和javascript，但当我在WebView中使用这个html文件时，它会运行，但一旦点击登录或注册按钮，应用程序就会崩溃 起初我认为这是我的设备的问题，但后来我尝试了几个设备，并使用干净的代码。 但到目前为止，这个问题仍然没有得到解决 这是我的MainActivity.java public class MainActivity extends AppCompatActivity { @Override p
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String myLogin = "file:///android_asset/index.html";
WebView view = (WebView) findViewById(R.id.webView);
view.getSettings().setJavaScriptEnabled(true);
view.addJavascriptInterface(new WebViewInterface(),"JavascriptInterface");
view.loadUrl(myLogin);
}
public class WebViewInterface{
@JavascriptInterface
public void toast(){
Toast.makeText(MainActivity.this,"Interface is working!!!",Toast.LENGTH_LONG).show();
}
}
}
<!DOCTYPE html>
<html lang="en" >
<head>
<meta charset="UTF-8">
<link rel='stylesheet' href='https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.7.2/css/all.min.css'>
<link rel="stylesheet" href="./style.css">
</head>
<body>
<div class="container" id="container">
<div class="form-container sign-up-container">
<form action="1">
<h1>Create Account</h1>
<span><br>Use your Email for Registration</span>
<input type="text" placeholder="Name" id="up_name" />
<input type="email" placeholder="Email" id="up_email"/>
<input type="password" placeholder="Password" id="up_password"/>
<button id="signUpBtn">Sign Up</button>
</form>
</div>
<div class="form-container sign-in-container">
<form action="2">
<h1>Sign in</h1>
<span><br>Use your Email Account to Login</span>
<input type="email" placeholder="Email" id="in_email"/>
<input type="password" placeholder="Password" id="in_password"/>
<button id="signInBtn">Sign In</button>
</form>
</div>
<div class="overlay-container">
<div class="overlay">
<div class="overlay-panel overlay-left">
<h1>Welcome Back!</h1>
<p>To keep connected with us please login with your personal info</p>
<button class="ghost" id="signIn">Sign In</button>
</div>
<div class="overlay-panel overlay-right">
<h1>Hello, Friend!</h1>
<p>Enter your personal details and start journey with us</p>
<button class="ghost" id="signUp">Sign Up</button>
</div>
</div>
</div>
</div>
<script src="./script.js"></script>
</body>
</html>
@import url('https://fonts.googleapis.com/css?family=Montserrat:400,800');
* {
box-sizing: border-box;
}
body {
background: #f6f5f7;
display: flex;
justify-content: center;
align-items: center;
flex-direction: column;
font-family: 'Montserrat', sans-serif;
height: 100vh;
margin: 0px;
}
h1 {
font-weight: bold;
margin: 0;
}
h2 {
text-align: center;
}
p {
font-size: 14px;
font-weight: 100;
line-height: 20px;
letter-spacing: 0.5px;
margin: 20px 0 30px;
}
span {
font-size: 12px;
}
a {
color: #333;
font-size: 14px;
text-decoration: none;
margin: 15px 0;
}
button {
border-radius: 20px;
border: 1px solid #FF4B2B;
background-color: #FF4B2B;
color: #FFFFFF;
font-size: 12px;
font-weight: bold;
padding: 12px 45px;
letter-spacing: 1px;
text-transform: uppercase;
transition: transform 80ms ease-in;
}
button:active {
transform: scale(0.95);
}
button:focus {
outline: none;
}
button.ghost {
background-color: transparent;
border-color: #FFFFFF;
}
form {
background-color: #FFFFFF;
display: flex;
align-items: center;
justify-content: center;
flex-direction: column;
padding: 0 50px;
height: 100%;
text-align: center;
}
input {
background-color: #eee;
border: none;
padding: 12px 15px;
margin: 8px 0;
width: 100%;
}
.container {
background-color: #fff;
border-radius: 10px;
box-shadow: 0 14px 28px rgba(0,0,0,0.25),
0 10px 10px rgba(0,0,0,0.22);
position: relative;
overflow: hidden;
width: 100%;
max-width: 100%;
min-height: 100%;
}
.form-container {
position: absolute;
top: 0;
height: 100%;
transition: all 0.6s ease-in-out;
}
.sign-in-container {
left: 0;
width: 50%;
z-index: 2;
}
.container.right-panel-active .sign-in-container {
transform: translateX(100%);
}
.sign-up-container {
left: 0;
width: 50%;
opacity: 0;
z-index: 1;
}
.container.right-panel-active .sign-up-container {
transform: translateX(100%);
opacity: 1;
z-index: 5;
animation: show 0.6s;
}
@keyframes show {
0%, 49.99% {
opacity: 0;
z-index: 1;
}
50%, 100% {
opacity: 1;
z-index: 5;
}
}
.overlay-container {
position: absolute;
top: 0;
left: 50%;
width: 50%;
height: 100%;
overflow: hidden;
transition: transform 0.6s ease-in-out;
z-index: 100;
}
.container.right-panel-active .overlay-container{
transform: translateX(-100%);
}
.overlay {
background: #FF416C;
background: -webkit-linear-gradient(to right, #FF4B2B, #FF416C);
background: linear-gradient(to right, #FF4B2B, #FF416C);
background-repeat: no-repeat;
background-size: cover;
background-position: 0 0;
color: #FFFFFF;
position: relative;
left: -100%;
height: 100%;
width: 200%;
transform: translateX(0);
transition: transform 0.6s ease-in-out;
}
.container.right-panel-active .overlay {
transform: translateX(50%);
}
.overlay-panel {
position: absolute;
display: flex;
align-items: center;
justify-content: center;
flex-direction: column;
padding: 0 40px;
text-align: center;
top: 0;
height: 100%;
width: 50%;
transform: translateX(0);
transition: transform 0.6s ease-in-out;
}
.overlay-left {
transform: translateX(-20%);
}
.container.right-panel-active .overlay-left {
transform: translateX(0);
}
.overlay-right {
right: 0;
transform: translateX(0);
}
.container.right-panel-active .overlay-right {
transform: translateX(20%);
}
.social-container {
margin: 20px 0;
}
.social-container a {
border: 1px solid #DDDDDD;
border-radius: 50%;
display: inline-flex;
justify-content: center;
align-items: center;
margin: 0 5px;
height: 40px;
width: 40px;
}
footer {
background-color: #222;
color: #fff;
font-size: 14px;
bottom: 0;
position: fixed;
left: 0;
right: 0;
text-align: center;
z-index: 999;
}
footer p {
margin: 10px 0;
}
footer i {
color: red;
}
footer a {
color: #3c97bf;
text-decoration: none;
}
--------- beginning of crash
2019-09-05 14:48:49.724 16830-16830/com.example.ekka4sept E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.ekka4sept, PID: 16830
android.os.FileUriExposedException: file:///android_asset/2? exposed beyond app through Intent.getData()
at android.os.StrictMode.onFileUriExposed(StrictMode.java:1978)
at android.net.Uri.checkFileUriExposed(Uri.java:2371)
at android.content.Intent.prepareToLeaveProcess(Intent.java:10260)
at android.content.Intent.prepareToLeaveProcess(Intent.java:10213)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1854)
at android.app.Activity.startActivityForResult(Activity.java:4599)
at androidx.fragment.app.FragmentActivity.startActivityForResult(FragmentActivity.java:767)
at android.app.Activity.startActivityForResult(Activity.java:4557)
at androidx.fragment.app.FragmentActivity.startActivityForResult(FragmentActivity.java:754)
at android.app.Activity.startActivity(Activity.java:4918)
at android.app.Activity.startActivity(Activity.java:4886)
at android.content.ContextWrapper.startActivity(ContextWrapper.java:379)
at aJw.startActivity(PG:22)
at aHi.a(PG:34)
at org.chromium.android_webview.AwContentsClientBridge.shouldOverrideUrlLoading(PG:161)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:326)
at android.os.Looper.loop(Looper.java:160)
at android.app.ActivityThread.main(ActivityThread.java:6898)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:537)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
2019-09-05 14:48:49.730 16830-16830/com.example.ekka4sept W/OPDiagnose: getService:OPDiagnoseService NULL
2019-09-05 14:48:49.737 16830-17711/com.example.ekka4sept D/OSTracker: OS Event: crash
2019-09-05 14:48:49.740 16830-16830/com.example.ekka4sept W/RenderThread: type=1400 audit(0.0:1174180): avc: denied { read } for name="u:object_r:vendor_default_prop:s0" dev="tmpfs" ino=15867 scontext=u:r:untrusted_app:s0:c63,c257,c512,c768 tcontext=u:object_r:vendor_default_prop:s0 tclass=file permissive=0
2019-09-05 14:48:49.749 16830-16976/com.example.ekka4sept E/libc: Access denied finding property "vendor.debug.egl.changepixelformat"
2019-09-05 14:48:49.760 16830-16830/com.example.ekka4sept W/RenderThread: type=1400 audit(0.0:1174181): avc: denied { read } for name="u:object_r:vendor_default_prop:s0" dev="tmpfs" ino=15867 scontext=u:r:untrusted_app:s0:c63,c257,c512,c768 tcontext=u:object_r:vendor_default_prop:s0 tclass=file permissive=0
2019-09-05 14:48:49.771 16830-16976/com.example.ekka4sept E/libc: Access denied finding property "vendor.debug.egl.swapinterval"
2019-09-05 14:48:49.770 16830-16830/com.example.ekka4sept W/RenderThread: type=1400 audit(0.0:1174182): avc: denied { read } for name="u:object_r:vendor_default_prop:s0" dev="tmpfs" ino=15867 scontext=u:r:untrusted_app:s0:c63,c257,c512,c768 tcontext=u:object_r:vendor_default_prop:s0 tclass=file permissive=0
2019-09-05 14:48:49.783 16830-16976/com.example.ekka4sept E/libc: Access denied finding property "vendor.debug.egl.swapinterval"
2019-09-05 14:48:49.793 16830-16830/com.example.ekka4sept I/Process: Sending signal. PID: 16830 SIG: 9
请帮助我们，谢谢你的支持 请尝试使用，而不是像这样加载文件
String myLogin=”file:///android_asset/index.html";
使用android文件提供者。看来这就是问题所在
您的问题已在此处得到回答：嘿，您给出的解决方案有效，但出现的问题是，在新活动打开一秒钟之前，网页加载失败会闪烁。如果你能帮我，那就太好了！你能为输出制作一个视频/GIF吗？我怎么上传视频呢？给我这里的链接：DHey Dimitris，你能帮我设置文件提供商吗？因为我是android新手，我不知道如何使用它。遵循该步骤，并在provider_paths.xml文件中将path元素替换为您的元素。
--------- beginning of crash
2019-09-05 14:48:49.724 16830-16830/com.example.ekka4sept E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.ekka4sept, PID: 16830
android.os.FileUriExposedException: file:///android_asset/2? exposed beyond app through Intent.getData()
at android.os.StrictMode.onFileUriExposed(StrictMode.java:1978)
at android.net.Uri.checkFileUriExposed(Uri.java:2371)
at android.content.Intent.prepareToLeaveProcess(Intent.java:10260)
at android.content.Intent.prepareToLeaveProcess(Intent.java:10213)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1854)
at android.app.Activity.startActivityForResult(Activity.java:4599)
at androidx.fragment.app.FragmentActivity.startActivityForResult(FragmentActivity.java:767)
at android.app.Activity.startActivityForResult(Activity.java:4557)
at androidx.fragment.app.FragmentActivity.startActivityForResult(FragmentActivity.java:754)
at android.app.Activity.startActivity(Activity.java:4918)
at android.app.Activity.startActivity(Activity.java:4886)
at android.content.ContextWrapper.startActivity(ContextWrapper.java:379)
at aJw.startActivity(PG:22)
at aHi.a(PG:34)
at org.chromium.android_webview.AwContentsClientBridge.shouldOverrideUrlLoading(PG:161)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:326)
at android.os.Looper.loop(Looper.java:160)
at android.app.ActivityThread.main(ActivityThread.java:6898)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:537)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
2019-09-05 14:48:49.730 16830-16830/com.example.ekka4sept W/OPDiagnose: getService:OPDiagnoseService NULL
2019-09-05 14:48:49.737 16830-17711/com.example.ekka4sept D/OSTracker: OS Event: crash
2019-09-05 14:48:49.740 16830-16830/com.example.ekka4sept W/RenderThread: type=1400 audit(0.0:1174180): avc: denied { read } for name="u:object_r:vendor_default_prop:s0" dev="tmpfs" ino=15867 scontext=u:r:untrusted_app:s0:c63,c257,c512,c768 tcontext=u:object_r:vendor_default_prop:s0 tclass=file permissive=0
2019-09-05 14:48:49.749 16830-16976/com.example.ekka4sept E/libc: Access denied finding property "vendor.debug.egl.changepixelformat"
2019-09-05 14:48:49.760 16830-16830/com.example.ekka4sept W/RenderThread: type=1400 audit(0.0:1174181): avc: denied { read } for name="u:object_r:vendor_default_prop:s0" dev="tmpfs" ino=15867 scontext=u:r:untrusted_app:s0:c63,c257,c512,c768 tcontext=u:object_r:vendor_default_prop:s0 tclass=file permissive=0
2019-09-05 14:48:49.771 16830-16976/com.example.ekka4sept E/libc: Access denied finding property "vendor.debug.egl.swapinterval"
2019-09-05 14:48:49.770 16830-16830/com.example.ekka4sept W/RenderThread: type=1400 audit(0.0:1174182): avc: denied { read } for name="u:object_r:vendor_default_prop:s0" dev="tmpfs" ino=15867 scontext=u:r:untrusted_app:s0:c63,c257,c512,c768 tcontext=u:object_r:vendor_default_prop:s0 tclass=file permissive=0
2019-09-05 14:48:49.783 16830-16976/com.example.ekka4sept E/libc: Access denied finding property "vendor.debug.egl.swapinterval"
2019-09-05 14:48:49.793 16830-16830/com.example.ekka4sept I/Process: Sending signal. PID: 16830 SIG: 9