关于Android webView的用法


如果你加载的网页需要Flash 插件支持，则可以先检测是否安装了Flash插件，如果没有安装该插件则下载该插件

private boolean checkFlash() {

PackageManager pm = getPackageManager();

List<PackageInfo> infoList = pm

.getInstalledPackages(PackageManager.GET_SERVICES);

for (PackageInfo info : infoList) {

if ("com.adobe.flashplayer".equals(info.packageName)) {

return true;

}

}

AlertDialog.Builder builder = new Builder(this);

// builder.setIcon(R.drawable.ic_launcher);

builder.setTitle(getString(R.string.flash_is_need_to_display_the_map));

// builder.setMessage(result.getUpdateDate());

builder.setCancelable(false);

builder.setNegativeButton(getString(R.string.download), new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

installFlashApk();

}

private void installFlashApk() {

Intent installIntent = new Intent(

"android.intent.action.VIEW");

installIntent.setData(Uri

.parse("market://details?id=com.adobe.flashplayer"));

startActivity(installIntent);

finish();

}

});

builder.setPositiveButton(R.string.btn_cancle, new OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

finish();

}

});

builder.show();

return false;

}

//webview的一些设置。

mWebView=(WebView) findViewById(R.id.view1);

mWebView.getSettings().setDefaultTextEncodingName("gbk") ;

mWebView.getSettings().setJavaScriptEnabled(true);// 设置支持javascript

mWebView.requestFocus();// 获取触摸焦点

mWebView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);// 取消滚动条

mWebView.getSettings().setBuiltInZoomControls(true); // 构建缩放控制

mWebView.getSettings().setSupportZoom(true); // 设置支持缩放

mWebView.getSettings().setBlockNetworkImage(false);

mWebView.getSettings().setBlockNetworkLoads(false);

mWebView.getSettings().setDomStorageEnabled(true);

mWebView.setWebViewClient(new WebViewClient()

{

@Override

public boolean shouldOverrideUrlLoading(WebView view, String url)

{

view.loadUrl(url); // 在当前的webview中跳转到新的url

if (url.startsWith("mailto:") || url.startsWith("geo:") ||url.startsWith("tel:")) {

Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));

startActivity(intent);

}

rememberNextUrl(url);

return true;

}

private void rememberNextUrl(String url) {

if(!url.startsWith("tel:")){

nextUrl=url;

}

LogUtil.i("url=="+url);

}

@Override

public void onPageStarted(WebView view, String url, Bitmap favicon) {

// TODO Auto-generated method stub

super.onPageStarted(view, url, favicon);

//progressBar1.setVisibility(View.VISIBLE);

}

@Override

public void onPageFinished(WebView view, String url) {

rememberNextUrl(url);

// TODO Auto-generated method stub

try {

new Handler().postDelayed(new Runnable() {

public void run() {

imageView.setVisibility(View.GONE);

progressBar1.setVisibility(View.GONE);

}

}, 1000);

} catch (Exception ex) {

ex.printStackTrace();

}

super.onPageFinished(view, url);

rememberNextUrl(url);

}

@Override

public void onReceivedError(WebView view, int errorCode,

String description, String failingUrl) {

if(failingUrl.startsWith("tel:")){

view.loadUrl(nextUrl);

// showShortToastMessage("拨打电话");

Intent intent = new Intent();

// intent.setAction(Intent.ACTION_CALL);

intent.setAction(Intent.ACTION_DIAL);

intent.setData(Uri.parse(failingUrl));

startActivity(intent);

}else{

view.loadUrl(nextUrl);

showShortToastMessage("亲，您的手机可能不支持该功能哦");

// super.onReceivedError(view, errorCode, description, failingUrl);

}

}

public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error){

//handler.cancel(); 默认的处理方式，WebView变成空白页

handler.proceed();//接受证书

//handleMessage(Message msg); 其他处理

}

@Override

public WebResourceResponse shouldInterceptRequest(WebView view,

String url) {

return super.shouldInterceptRequest(view, url);

}

});

//第一个参数为调用的java对象 第二个参数 js里的 java对象名，js可以通过该对象名调用java对象的方法

mWebView.addJavascriptInterface(this, "javaObj");

mWebView.setWebChromeClient(new MyWebChromeClient());

mWebView.loadUrl(url);

/***

* 自定义WebChromeClient，做选择图片处理

* @author spring sky

* 创建时间：Aug 19, 20133:40:46 PM

*/

private class MyWebChromeClient extends WebChromeClient {

// For Android 3.0+

public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {

if (mUploadMessage != null) return;

mUploadMessage = uploadMsg;

//selectImage();

createFileIntent();

}

// For Android < 3.0

// The undocumented magic method override

// Eclipse will swear at you if you try to put @Override here

public void openFileChooser(ValueCallback<Uri> uploadMsg) {

mUploadMessage = uploadMsg;

createFileIntent();

}

// For Android > 4.1.1

// public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {

// openFileChooser(uploadMsg, acceptType);

// }

// @Override

public void openFileChooser(ValueCallback<Uri> uploadMsg,

String acceptType, String capture) {

mUploadMessage = uploadMsg;

// createFileIntent(acceptType,capture);

createFileIntent();

// createDefaultOpenableIntent();

// createChooserIntent();

}

private void createFileIntent() {

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);

intent.addCategory(Intent.CATEGORY_OPENABLE);

intent.setType("image/*");

startActivityForResult(

Intent.createChooser(intent, "完成操作需要使用"),

FILECHOOSER_RESULTCODE);

}

private void createFileIntent(String acceptType, String capture) {

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);

intent.addCategory(Intent.CATEGORY_OPENABLE);

intent.setType(acceptType);

startActivityForResult(

Intent.createChooser(intent,capture),

FILECHOOSER_RESULTCODE);

}

private Intent createDefaultOpenableIntent() {

// Create and return a chooser with the default OPENABLE

// actions including the camera, camcorder and sound

// recorder where available.

Intent i = new Intent(Intent.ACTION_GET_CONTENT);

i.addCategory(Intent.CATEGORY_OPENABLE);

i.setType("*/*");

Intent chooser = createChooserIntent(createCameraIntent(), createCamcorderIntent(),

createSoundRecorderIntent());

chooser.putExtra(Intent.EXTRA_INTENT, i);

startActivityForResult(

Intent.createChooser(i, "完成操作需要使用"),

FILECHOOSER_RESULTCODE);

return chooser;

}

private Intent createChooserIntent(Intent... intents) {

Intent chooser = new Intent(Intent.ACTION_CHOOSER);

chooser.putExtra(Intent.EXTRA_INITIAL_INTENTS, intents);

chooser.putExtra(Intent.EXTRA_TITLE, "File Chooser");

startActivityForResult(

Intent.createChooser(chooser, "完成操作需要使用"),

FILECHOOSER_RESULTCODE);

return chooser;

}

private Intent createCameraIntent() {

Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

File externalDataDir = Environment.getExternalStoragePublicDirectory(

Environment.DIRECTORY_DCIM);

File cameraDataDir = new File(externalDataDir.getAbsolutePath() +

File.separator + "browser-photos");

cameraDataDir.mkdirs();

mCameraFilePath = cameraDataDir.getAbsolutePath() + File.separator +

System.currentTimeMillis() + ".jpg";

cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(mCameraFilePath)));

return cameraIntent;

}

private Intent createCamcorderIntent() {

return new Intent(MediaStore.ACTION_VIDEO_CAPTURE);

}

private Intent createSoundRecorderIntent() {

return new Intent(MediaStore.Audio.Media.RECORD_SOUND_ACTION);

}

}

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent intent) {

if (requestCode == FILECHOOSER_RESULTCODE) {

if (null == mUploadMessage)

return;

Uri result = intent == null || resultCode != RESULT_OK ? null : intent.getData();

mUploadMessage.onReceiveValue(result);

if(result!=null){

LogUtil.i("图片地址=="+result.getPath());

}

mUploadMessage = null;

}

}