I am trying to have a web page appear in my app. This is what I have done:
In my Manifest I added the following code:
<uses-permission android:name="android.permission.INTERNET" />
In my content_main.xml I added the following code:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<WebView android:id="@+id/webView"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</LinearLayout>
In my main Activity.java file added the following code:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
String url = "http://bigdaddyapp.com";
webview = (WebView) findViewById(R.id.myWebView);
//next line explained below
webview.setWebViewClient(new MyWebViewClient(this));
webview.getSettings().setJavaScriptEnabled(true);
webview.loadUrl(url);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
But I get the following errors:
What am I doing wrong?
You have quite a few issues here.
First, you never declare your webView
variable. In this case, the fix is simple. You just need to define its type inline:
WebView webview = (WebView) findViewById(R.id.myWebView);
Second, you gave your WebView the ID "webView" in your layout XML, but you try to refer to it via R.id.myWebView
. Switch this to use the same ID and it will work.
For the third error, it sounds like you don't actually have a class called MyWebViewClient
. Make sure that you do and that it is public.
You also aren't setting the correct layout. You are calling setContentView(R.layout.activity_main)
, but your layout is called "content_main."
The rest of the errors should disappear once you fix these issues.
setContentView(R.layout.activity_main);
应该:
setContentView(R.layout.content_main);
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.