比较完整的一个WebView 可以拿过来直接用 写的有一点点乱,大家将就的这使用,
包含的内容 url拦截, 支持<input type = file>标签 选择手机图片 返回图片 ,js交互 ,还有进度条内容
其中 持<input type = file>标签 选择手机图片中 主要是 设置 webChromeClient中的 可以看到 onActivityResult 中返回图片 .
public class WebViewActivity extends BaseActivity {
@BindView(R.id.web_view)
WebView mWebView;
@BindView(R.id.progress_bar)
ProgressBar progressBar;
private ValueCallback<Uri> mUploadMessage;
public ValueCallback<Uri[]> uploadMessage;
public static final int REQUEST_SELECT_FILE = 100;
private final static int FILECHOOSER_RESULTCODE = 2;
@Override
protected int getLayoutId() {
return R.layout.activity_web_view;
}
@Override
protected void initParams() {
initWebView();
}
// 对webView 进行初始化设置
private void initWebView() {
WebSettings mWebSettings = mWebView.getSettings();
mWebSettings.setLoadWithOverviewMode(true);
mWebSettings.setUseWideViewPort(true);
mWebSettings.setDefaultTextEncodingName("utf-8");
mWebSettings.setLoadsImagesAutomatically(true);
mWebSettings.setSupportZoom(true); //支持放大缩小
mWebSettings.setBuiltInZoomControls(true);
mWebSettings.setDisplayZoomControls(false); //不显示webview缩放按钮
mWebSettings.setJavaScriptEnabled(true); //调用JS方法.安卓版本大于17,加上注解 @JavascriptInterface
saveData(mWebSettings);
newWin(mWebSettings);
//setWebChromeClient辅助WebView处理JavaScript的对话框，网站图标，网站title，加载进度等
mWebView.setWebChromeClient(webChromeClient);
//setWebClient帮助WebView处理各种通知、请求事件
mWebView.setWebViewClient(webViewClient);
}
//
WebViewClient webViewClient = new WebViewClient() {
/**
* 多页面在同一个WebView中打开，就是不新建activity或者调用系统浏览器打开
* 在这里进行 url地址拦截
*/
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
};
WebChromeClient webChromeClient = new WebChromeClient() {
@Override
public void onReceivedIcon(WebView view, Bitmap icon) {
super.onReceivedIcon(view, icon);
}
@Override
public void onGeolocationPermissionsHidePrompt() {
super.onGeolocationPermissionsHidePrompt();
}
//设置 进度条
@Override
public void onProgressChanged(WebView view, int newProgress) {
setProgressBar(view, newProgress);
super.onProgressChanged(view, newProgress);
}
//=========以下都是对html 标签页 中含有标签<input type = file/> 选择图片进行拦截的 选择图片对应的重写onActivityResult==========================================================
// For 3.0+ Devices (Start)
// onActivityResult attached before constructor
protected void openFileChooser(ValueCallback uploadMsg, String acceptType) {
mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
startActivityForResult(Intent.createChooser(i, "File Browser"), FILECHOOSER_RESULTCODE);
}
// For Lollipop 5.0+ Devices
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
@Override
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
if (uploadMessage != null) {
uploadMessage.onReceiveValue(null);
uploadMessage = null;
}
uploadMessage = filePathCallback;
Intent intent = fileChooserParams.createIntent();
try {
startActivityForResult(intent, REQUEST_SELECT_FILE);
} catch (ActivityNotFoundException e) {
uploadMessage = null;
Toast.makeText(getBaseContext(), "Cannot Open File Chooser", Toast.LENGTH_LONG).show();
return false;
}
return true;
}
//For Android 4.1 only
protected void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
mUploadMessage = uploadMsg;
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("image/*");
startActivityForResult(Intent.createChooser(intent, "File Browser"), FILECHOOSER_RESULTCODE);
}
protected void openFileChooser(ValueCallback<Uri> uploadMsg) {
mUploadMessage = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
startActivityForResult(Intent.createChooser(i, "File Chooser"), FILECHOOSER_RESULTCODE);
}
//=========HTML5定位==========================================================
@Override
public void onGeolocationPermissionsShowPrompt(final String origin,
final GeolocationPermissions.Callback callback) {
callback.invoke(origin, true, false);//注意个函数，第二个参数就是是否同意定位权限，第三个是是否希望内核记住
super.onGeolocationPermissionsShowPrompt(origin, callback);
}
//=========多窗口的问题==========================================================
@Override
public boolean onCreateWindow(WebView view, boolean isDialog,
boolean isUserGesture, Message resultMsg) {
WebView.WebViewTransport transport = (WebView.WebViewTransport) resultMsg.obj;
transport.setWebView(view);
resultMsg.sendToTarget();
return true;
}
};
/**
* HTML5数据存储
*/
private void saveData(WebSettings mWebSettings) {
//有时候网页需要自己保存一些关键数据,Android WebView 需要自己设置
mWebSettings.setDomStorageEnabled(true);
mWebSettings.setDatabaseEnabled(true);
mWebSettings.setAppCacheEnabled(true);
String appCachePath = getApplicationContext().getCacheDir().getAbsolutePath();
mWebSettings.setAppCachePath(appCachePath);
}
private void setProgressBar(WebView view, int newProgress) {
if (newProgress == 100) {
progressBar.setVisibility(View.GONE);//加载完网页进度条消失
} else {
progressBar.setVisibility(View.VISIBLE);//开始加载网页时显示进度条
progressBar.setProgress(newProgress);//设置进度值
}
}
/**
* 多窗口的问题
*/
private void newWin(WebSettings mWebSettings) {
//html中的_bank标签就是新建窗口打开，有时会打不开，需要加以下
//然后 复写 WebChromeClient的onCreateWindow方法
mWebSettings.setSupportMultipleWindows(false);
mWebSettings.setJavaScriptCanOpenWindowsAutomatically(true);
}
// 返回上一级 而不是退出webView
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && mWebView.canGoBack()) {
mWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
@Override
protected void onDestroy() {
super.onDestroy();
if (mWebView != null) {
mWebView.clearHistory();
((ViewGroup) mWebView.getParent()).removeView(mWebView);
mWebView.loadUrl("about:blank");
mWebView.stopLoading();
mWebView.setWebChromeClient(null);
mWebView.setWebViewClient(null);
mWebView.destroy();
mWebView = null;
}
}
// 选择图片 返回图片数据 操作
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
if (requestCode == REQUEST_SELECT_FILE) {
if (uploadMessage == null)
return;
uploadMessage.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, data));
uploadMessage = null;
}
} else if (requestCode == FILECHOOSER_RESULTCODE) {
if (null == mUploadMessage)
return;
// Use MainActivity.RESULT_OK if you're implementing WebView inside Fragment
// Use RESULT_OK only if you're implementing WebView inside an Activity
Uri result = data == null || resultCode != RESULT_OK ? null : data.getData();
mUploadMessage.onReceiveValue(result);
mUploadMessage = null;
} else
Toast.makeText(getBaseContext(), "选择图片失败", Toast.LENGTH_LONG).show();
}
}
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