问题描述
我为我的企业开发了一个网站,我几乎只用PHP工作
I developed a website for my entreprisee and I work almost exclusively with PHP
所以Java语言(和android工作室)对我来说真的很新
So the Java language (and android studio) is a really new for me
尽管我必须创建一个APK来使用该网站(为了阻止这个网站上的Android主页)
Despite this I have to create an APK to use the website (in order to block the android home on this site)
目前我设法设置刷新页面,现在我正在尝试向我的使用WebView的应用程序添加进度/加载栏但它不起作用..
For the moment I managed to set up refresh pages, and now I am trying to add a progress/loading bar to my application that uses WebView but it doesn't work ..
MainActivity.java
import android.support.v4.widget.SwipeRefreshLayout;
import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class MainActivity extends Activity {
WebView webView;
SwipeRefreshLayout swipe;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
swipe = (SwipeRefreshLayout) findViewById(R.id.swipe);
swipe.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
webView.reload();
}
});
LoadWeb();
}
public void LoadWeb(){
webView = (WebView) findViewById(R.id.webView);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setAppCacheEnabled(true);
webView.loadUrl("https://www.google.com/");
swipe.setRefreshing(true);
webView.setWebViewClient(new WebViewClient(){
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
webView.loadUrl("file:///android_asset/error.html");
}
public void onLoadResource(WebView view, String url) { //Doesn't work
swipe.setRefreshing(true);
}
public void onPageFinished(WebView view, String url){
//Hide the SwipeReefreshLayout
swipe.setRefreshing(false);
}
});
}
@Override
public void onBackPressed(){
if (webView.canGoBack()){
webView.goBack();
}else {
finish();
}
}
}
Activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="eu.test.testappli.MainActivity">
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/swipe"
android:layout_width="match_parent"
android:layout_height="match_parent">
<WebView
android:id="@+id/webView"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.v4.widget.SwipeRefreshLayout>
</android.support.constraint.ConstraintLayout>
看起来很简单,但java对我来说仍然模糊不清,所以我无法实现这些代码我在网上找到..
It may seem simple, but the java remains obscure for me so I can not implement the pieces of code that I find on the web ..
推荐答案
试试这个我在代码中做了一些更改
Try this i have make some changes in your code
import android.support.v4.widget.SwipeRefreshLayout;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;
import android.support.v7.widget.Toolbar;
public class Main2Activity extends AppCompatActivity {
WebView webView;
SwipeRefreshLayout swipe;
ProgressBar progressBar;
Toolbar toolbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
progressBar = (ProgressBar) findViewById(R.id.awv_progressBar);
swipe = (SwipeRefreshLayout) findViewById(R.id.swipe);
LoadWeb();
progressBar.setMax(100);
progressBar.setProgress(1);
swipe = (SwipeRefreshLayout) findViewById(R.id.swipe);
swipe.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
webView.reload();
}
});
webView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
progressBar.setProgress(progress);
}
});
webView.setWebViewClient(new WebViewClient() {
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
progressBar.setVisibility(View.VISIBLE);
}
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
webView.loadUrl("file:///android_asset/error.html");
}
public void onLoadResource(WebView view, String url) { //Doesn't work
//swipe.setRefreshing(true);
}
public void onPageFinished(WebView view, String url) {
//Hide the SwipeReefreshLayout
progressBar.setVisibility(View.GONE);
swipe.setRefreshing(false);
}
});
}
public void LoadWeb() {
webView = (WebView) findViewById(R.id.webView);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setAppCacheEnabled(true);
webView.loadUrl("https://www.google.com/");
swipe.setRefreshing(true);
}
@Override
public void onBackPressed() {
if (webView.canGoBack()) {
webView.goBack();
} else {
finish();
}
}
}
XML.LAYOUT
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/rel_parent"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".Main2Activity">
<ProgressBar
android:id="@+id/awv_progressBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="15dp"
android:layout_marginTop="7dp"
android:indeterminate="true" />
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/swipe"
android:layout_width="match_parent"
android:layout_height="match_parent">
<WebView
android:id="@+id/webView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.v4.widget.SwipeRefreshLayout>
</LinearLayout>
将此主题添加到您的活动中
add this theme to your activity
<style name="AppTheme3" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
输出
这篇关于如何在WebView中添加进度/加载栏的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!