android js 弹窗,android webview js alert对话框 不能弹出 解决办法

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.webviewmain);

/** android内置浏览器对象 */

webView = (WebView) this.findViewById(R.id.webView);

/**

* 加载放在assets目录下的android.html文件 注意url的地址前缀为: file:///android_asset/

*

* 其实可以把这个html布局文件放在公网中,这样方便随时更新维护 例如

* webview.loadUrl("http://192.168.1.100:8080/Hello/index.html");

*/

//webView.loadUrl("file:///android_asset/android.html");

//webView.loadUrl("file:///android_asset/index.html");

/** 允许javascript的运行 */

webView.getSettings().setJavaScriptEnabled(true);

final Context myApp = this;

/* WebChromeClient must be set BEFORE calling loadUrl! */

webView.setWebChromeClient(new WebChromeClient() {

@Override

public boolean onJsAlert(WebView view, String url, String message, final android.webkit.JsResult result)

{

new AlertDialog.Builder(MainActivity.this)

.setTitle("javaScript dialog")

.setMessage(message)

.setPositiveButton(android.R.string.ok,

new AlertDialog.OnClickListener()

{

public void onClick(DialogInterface dialog, int which)

{

result.confirm();

}

})

.setCancelable(false)

.create()

.show();

return true;

};

@Override

public boolean onJsConfirm(WebView view, String url,

String message, final JsResult result) {

AlertDialog.Builder b = new AlertDialog.Builder(MainActivity.this);

b.setTitle("Confirm");

b.setMessage(message);

b.setPositiveButton(android.R.string.ok,

new AlertDialog.OnClickListener() {

public void onClick(DialogInterface dialog,

int which) {

result.confirm();

}

});

b.setNegativeButton(android.R.string.cancel,

new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog,

int which) {

result.cancel();

}

});

b.setCancelable(false);

b.create();

b.show();

return true;

};

/*

@Override

public boolean onJsPrompt(WebView view, String url, String message,

String defaultValue, final JsPromptResult result) {

final LayoutInflater factory = LayoutInflater

.from(MainActivity.this);

final View v = factory.inflate(R.layout.prompt_dialog, null);

((TextView) v.findViewById(R.id.prompt_message_text))

.setText(message);

((EditText) v.findViewById(R.id.prompt_input_field))

.setText(defaultValue);

AlertDialog.Builder b = new AlertDialog.Builder(MainActivity.this);

b.setTitle("Prompt");

b.setView(v);

b.setPositiveButton(android.R.string.ok,

new AlertDialog.OnClickListener() {

public void onClick(DialogInterface dialog,

int which) {

String value = ((EditText) v

.findViewById(R.id.prompt_input_field))

.getText().toString();

result.confirm(value);

}

});

b.setNegativeButton(android.R.string.cancel,

new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog,

int which) {

result.cancel();

}

});

b.setOnCancelListener(new DialogInterface.OnCancelListener() {

public void onCancel(DialogInterface dialog) {

result.cancel();

}

});

b.show();

return true;

};*/

public void onProgressChanged(WebView view, int newProgress) {

MainActivity.this.getWindow().setFeatureInt(

Window.FEATURE_PROGRESS, newProgress * 100);

super.onProgressChanged(view, newProgress);

}

public void onReceivedTitle(WebView view, String title) {

MainActivity.this.setTitle(title);

super.onReceivedTitle(view, title);

}

});