Java internet连接更改时自动重新加载webview
当连接恢复时,我想运行此任务,我想调用NewortchangeReceiver构造函数。我在Mainactivity IntentFilter中编写了android.net.conn.CONNECTIVITY\u更改,因为android n7中的android manifest.xml中的android.net.conn.CONNECTIVITY\u更改不起作用。我想在internet连接更改时自动重新加载webviewJava internet连接更改时自动重新加载webview,java,android,android-webview,Java,Android,Android Webview,当连接恢复时,我想运行此任务,我想调用NewortchangeReceiver构造函数。我在Mainactivity IntentFilter中编写了android.net.conn.CONNECTIVITY\u更改,因为android n7中的android manifest.xml中的android.net.conn.CONNECTIVITY\u更改不起作用。我想在internet连接更改时自动重新加载webview protected void onCreate(Bundle savedI
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
wvDailyDarshan = (WebView) findViewById(R.id.wvDailyDarshan);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
IntentFilter intentFilter = new IntentFilter("android.net.conn.CONNECTIVITY_CHANGE");
context.registerReceiver(new NetworkChangeReceiver(), intentFilter);
Boolean connection = isNetworkConnected();
if (connection == false) {
Snackbar.make(this.getWindow().getDecorView().findViewById(android.R.id.content), "Please check your Internet Connection", Snackbar.LENGTH_SHORT).show();
} else if (connection == true) {
wvDailyDarshan.getSettings().setJavaScriptEnabled(true);
//wvDailyDarshan.loadUrl("http://www.swaminarayanbhagwan.com/daily-darshan/");
wvDailyDarshan.setWebViewClient(new myWebClient());
wvDailyDarshan.getSettings().setJavaScriptEnabled(true);
wvDailyDarshan.getSettings().setBuiltInZoomControls(true);
wvDailyDarshan.getSettings().setDisplayZoomControls(false);
wvDailyDarshan.loadUrl("https://www.google.co.in/");
}
}您可以创建一个新方法,如果未连接internet,该方法将自动调用。下面是一个粗略的例子。把它改成更有效的方式
private boolean shoudShowSnackbar = true;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
wvDailyDarshan = (WebView) findViewById(R.id.wvDailyDarshan);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
IntentFilter intentFilter = new IntentFilter("android.net.conn.CONNECTIVITY_CHANGE");
context.registerReceiver(new NetworkChangeReceiver(), intentFilter);
doThisThingIfFoundInternet();
}
private void doThisThingIfFoundInternet() {
if (isNetworkConnected()) {
wvDailyDarshan.getSettings().setJavaScriptEnabled(true);
//wvDailyDarshan.loadUrl("http://www.swaminarayanbhagwan.com/daily-darshan/");
wvDailyDarshan.setWebViewClient(new myWebClient());
wvDailyDarshan.getSettings().setJavaScriptEnabled(true);
wvDailyDarshan.getSettings().setBuiltInZoomControls(true);
wvDailyDarshan.getSettings().setDisplayZoomControls(false);
wvDailyDarshan.loadUrl("https://www.google.co.in/");
}else{
if (this.shoudShowSnackbar) {
Snackbar.make(this.getWindow().getDecorView().findViewById(android.R.id.content), "Please check your Internet Connection", Snackbar.LENGTH_SHORT).show();
shoudShowSnackbar = !shoudShowSnackbar;
}
doThisThingIfFoundInternet();
}
}
我从你的问题中得到的是,当连接发生变化时,你希望得到回调。 所以我会对此负责 网络更改接收器:
public class NetworkChangeReceiver extends BroadcastReceiver {
ConnectionChangeCallback connectionChangeCallback;
@Override
public void onReceive(Context context, Intent intent) {
ConnectivityManager cm = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
boolean isConnected = activeNetwork != null
&& activeNetwork.isConnectedOrConnecting();
if (connectionChangeCallback != null) {
connectionChangeCallback.onConnectionChange(isConnected);
}
}
public void setConnectionChangeCallback(ConnectionChangeCallback
connectionChangeCallback) {
this.connectionChangeCallback = connectionChangeCallback;
}
public interface ConnectionChangeCallback {
void onConnectionChange(boolean isConnected);
}
}
现在,您的活动应该在BraodCastReceiver ie NetworkChangeReceiver的对象上调用setConnectionChangeCallback,并提供ConnectionChangeCallback的实现
看起来像这样。
活动:
public class YourActivity implments NetworkChangeReceiver.ConnectionChangeCallback
{
@Override
protected void onCreate(Bundle savedInstanceState) {
.....
IntentFilter intentFilter = new
IntentFilter("android.net.conn.CONNECTIVITY_CHANGE");
NetworkChangeReceiver networkChangeReceiver = new NetworkChangeReceiver();
registerReceiver(networkChangeReceiver, intentFilter);
networkChangeReceiver.setConnectionChangeCallback(this);
}
@Override
public void onConnectionChange(boolean isConnected) {
if(isConnected){
// will be called when internet is back
}
else{
// will be called when internet is gone.
}
}
}
你的问题是什么?请编辑您的问题,并避免在您自己的问题上发表评论。您是否得到任何有效的答案?您应该接受它是否有效,或者评论您可能遇到的其他问题。另外,请检查onReceive中的intent.action.equalsandroid.net.conn.CONNECTIVITY\u是否有更改。并在onResume/onPause中添加networkChangeReceiver的注册/注销,如中所述。