无视。我打开了安装错误的应用程序。它工作得很好。 :)
我的 WebView 中的后退按钮可以正常工作,但我想知道一些事情。
如何让 webview 返回到它不能再返回,而不是退出程序,让它打开一个对话框,询问用户是否确定他们不会退出。
这是我对代码的看法。
感谢您抽出宝贵时间。
.java文件
package com.vtd.whatthe;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.widget.Toast;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class WhatThe extends Activity {
private WebView webview;
/** Called when the activity is first created. */
public void onBackPressed (){
if (webview.isFocused() && webview.canGoBack()) {
webview.goBack();
}
else {
openMyDialog(null);
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
webview = (WebView) findViewById(R.id.webview);
webview.setWebViewClient(new HelloWebViewClient());
webview.getSettings().setJavaScriptEnabled(true);
webview.setInitialScale(50);
webview.getSettings().setUseWideViewPort(true);
webview.loadUrl("http://test2.com/");
}
private class HelloWebViewClient extends WebViewClient {
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
public void openMyDialog(View view) {
showDialog(10);
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case 10:
// Create our AlertDialog
Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Are you sure you want to exit? You have unlimited guesses!")
.setCancelable(true)
.setPositiveButton("Yes",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
// Ends the activity
WhatThe.this.finish();
}
})
.setNegativeButton("Keep Guessing!",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
Toast.makeText(getApplicationContext(),
"Good Luck!",
Toast.LENGTH_SHORT).show();
}
});
return builder.create();
}
return super.onCreateDialog(id);
}
}
最佳答案
下面的代码对我有用
public void onBackPressed (){
if (webview.isFocused() && webview.canGoBack()) {
webview.goBack();
}
else {
super.onBackPressed();
finish();
}
}
关于带有后退按钮的 Android Webview,否则,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/6220602/