加载webview网页时所要执行的一些方法
mWebView.setWebViewClient(new WebViewClient() {
// 新开页面时用自己定义的webview来显示，不用系统自带的浏览器来显示
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
// 开始加载网页时要做的工作
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
}
// 加载完成时要做的工作
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
}
// 加载错误时要做的工作
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
}
});
处理网页中的一些对话框信息（提示对话框，带选择的对话框，带输入的对话框）
mWebView.setWebChromeClient(new WebChromeClient() {
// 提示对话框
@Override
public boolean onJsAlert(WebView view, String url, String message,
final JsResult result) {
// 构建一个Builder来显示网页中的alert对话框
Builder builder = new Builder(WebViewDemoActivity.this);
builder.setTitle("提示对话框");
builder.setMessage(message);
builder.setPositiveButton(android.R.string.ok,
new AlertDialog.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
result.confirm();
}
});
builder.setCancelable(false);
builder.create();
builder.show();
return true;
}
// 带按钮的对话框
@Override
public boolean onJsConfirm(WebView view, String url,
String message, final JsResult result) {
Builder builder = new Builder(WebViewDemoActivity.this);
builder.setTitle("带选择的对话框");
builder.setMessage(message);
builder.setPositiveButton(android.R.string.ok,
new AlertDialog.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
result.confirm();
}
});
builder.setNeutralButton(android.R.string.cancel,
new AlertDialog.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
result.cancel();
}
});
builder.setCancelable(false);
builder.create();
builder.show();
return true;
}
// 带输入框的对话框
@Override
public boolean onJsPrompt(WebView view, String url, String message,
String defaultValue, final JsPromptResult result) {
LayoutInflater inflater = LayoutInflater
.from(WebViewDemoActivity.this);
final View v = inflater.inflate(R.layout.myDialog, null);
// 设置 TextView对应网页中的提示信息
((TextView) v.findViewById(R.id.textView)).setText(message);
// 设置EditText对应网页中的输入框
((EditText) v.findViewById(R.id.editText))
.setText(defaultValue);
Builder builder = new Builder(WebViewDemoActivity.this);
builder.setTitle("带输入的对话框");
builder.setView(v);
builder.setPositiveButton(android.R.string.ok,
new AlertDialog.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
String value = ((EditText) v
.findViewById(R.id.editText)).getText()
.toString();
result.confirm(value);
}
});
builder.setNegativeButton(android.R.string.cancel,
new AlertDialog.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
result.cancel();
}
});
builder.setOnCancelListener(new DialogInterface.OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
result.cancel();
}
});
builder.create();
builder.show();
return true;
}
// 设置网页加载的进度条
@Override
public void onProgressChanged(WebView view, int newProgress) {
WebViewDemoActivity.this.getWindow().setFeatureInt(
Window.FEATURE_PROGRESS, newProgress * 100);
super.onProgressChanged(view, newProgress);
}
// 设置应用程序的标题
@Override
public void onReceivedTitle(WebView view, String title) {
WebViewDemoActivity.this.setTitle(title);
super.onReceivedTitle(view, title);
}
});
