WebView的一些神坑

最近在开发过程中遇到一个问题,主要是WebView页面，需要调用本地相机拍照及图库，遇到一系列的神坑，这里结合本人所查阅的资料给大家一一说明。

进入正题,首先来了解webview,这里我分享两篇大佬的博客

1.WebView开车指南

2.WebView详解

3.WebView深坑之旅

本人也是首次使用H5页面调用相机及图库，本以为只要将页面展示就可以，其他的都是前端的事情，我还能偷偷懒，可是在测试的时候就遇到了

第一个神坑：权限的添加

Android 6.0以后对于一些危险权限都需要动态的添加权限，这些对于大家来说都已经很容易实现了，大家可参考：

https://blog.csdn.net/m0_37959831/article/details/77854548

但是，如果你已经添加了权限，调用相机之后,文件回调不了,其实根本就是没有回调.这个时候你要去检查你的webview的Settings了关键代码,是否给足了权限;

WebSettings settings = webView.getSettings();settings.setUseWideViewPort(true);settings.setLoadWithOverviewMode(true);settings.setDomStorageEnabled(true);settings.setDefaultTextEncodingName("UTF-8");settings.setAllowContentAccess(true); // 是否可访问Content Provider的资源，默认值 truesettings.setAllowFileAccess(true);    // 是否可访问本地文件，默认值 true// 是否允许通过file url加载的Javascript读取本地文件，默认值 falsesettings.setAllowFileAccessFromFileURLs(false);// 是否允许通过file url加载的Javascript读取全部资源(包括文件,http,https)，默认值 falsesettings.setAllowUniversalAccessFromFileURLs(false);//开启JavaScript支持settings.setJavaScriptEnabled(true);// 支持缩放settings.setSupportZoom(true);

其中 settings.setDomStorageEnabled(true);这个方法当时我没加,血崩了一次;

第二个神坑：Android端 webview根本不能让h5自己调用,ios是可以的。

这里是为什么呢？查了资料发现Android端H5页面对于相机及图库的调用有一套专门的代码：这里给大家推荐两篇文章：

https://blog.csdn.net/m0_37959831/article/details/77854548

https://www.cnblogs.com/nmdzwps/p/5841509.html

大家啊先参考文档，最后我会贴上本人的代码供大家参考

第三个神坑：WebchromClient的openFileChooser()只调用了一次

首先了解为什么这个方法只调用了一次,看这篇博客就可

Android开发深入理解WebChromeClient之onShowFileChooser或openFileChooser使用说明
看了他基本你就了解怎么回事了

第四个神坑：android 7.0的FileProvider的坑

看洪阳大佬的这篇博客基本就了解了

Android 7.0 行为变更通过FileProvider在应用间共享文件吧

第五个神坑：WebView软键盘冲突

对于H5页面中的输入框与软件盘冲突的问题，或者输入框被软键盘遮盖问题，相信大部分人都遇到过，这里就和大家说下解决方案：

软键盘挡住输入框问题的终极解决方案

解决安卓全屏状态下WebView的输入框被软键盘挡住的问题

第六个神坑：H5页面加载地图

https://blog.csdn.net/jyz_2015/article/details/52776195

https://blog.csdn.net/csdndouniwan/article/details/51159901

贴上自己的代码：

public class WebViewInstallationActivity extends BaseActivity {// 定位private static final int REQ_SET_LOCATION = 300;private static final int MY_PERMISSIONS_REQUEST_CALL_PHONE = 1;//打电话private WebView webView;private String dataMap;private String order_type;private String out_trade_no;private int code;private String userid;private String installer_phone;//H5调用Android 相册 相机的private ValueCallback<Uri> mUploadMessage;// 表单的数据信息private ValueCallback<Uri[]> mUploadCallbackAboveL;private final static int FILECHOOSER_RESULTCODE = 1;// 表单的结果回调</span>private Uri imageUri;private WaitDialog waitDialog;private String h5_notice_url;private String url;private String gobackurl;private Uri bitmap2uri;@Overridepublic int getLayoutResId() {waitDialog = new WaitDialog(activity, "", false, null);String user_id = SpUtils.getUserId(activity);h5_notice_url = getIntent().getStringExtra("h5_notice_url");if (StringUtils.isEmpty(h5_notice_url)) {if (StringUtils.isEmpty(user_id)) {user_id = "";}url = ServiceApi.getWebView(user_id);} else if (!StringUtils.isEmpty(h5_notice_url)) {url = h5_notice_url;}return R.layout.activity_webview;}@Overrideprotected void initView() {if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {Window window = getWindow();window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);}webView = (WebView) findViewById(R.id.webview);WebSettings webSettings = webView.getSettings();webSettings.setJavaScriptEnabled(true);//支持jswebSettings.setAppCacheEnabled(true);webSettings.setDomStorageEnabled(true);//自适应屏幕webSettings.setLoadWithOverviewMode(true);webSettings.setUseWideViewPort(false);  //将图片调整到适合webview的大小webSettings.setSupportZoom(false);  // 设置可以支持缩放webSettings.setBuiltInZoomControls(false); //设置出现缩放工具webSettings.setTextZoom(100); //禁止缩放，按照百分百显示//缓存模式boolean networkAvailable = MySystemUtils.isNetworkAvailable(activity);if (networkAvailable) {webSettings.setCacheMode(WebSettings.LOAD_DEFAULT);  //缓存模式} else {webSettings.setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);  //缓存模式}webSettings.setAllowContentAccess(true); // 是否可访问Content Provider的资源，默认值 truewebSettings.setAllowFileAccess(true);  //设置可以访问本地文件webSettings.setNeedInitialFocus(true); //当webview调用requestFocus时为webview设置节点webSettings.setJavaScriptCanOpenWindowsAutomatically(true); //支持通过JS打开新窗口//启用数据库webSettings.setDatabaseEnabled(true);String dir = this.getApplicationContext().getDir("database", Context.MODE_PRIVATE).getPath();//webview定位相关设置webSettings.setGeolocationEnabled(true);//设置定位的数据库路径webSettings.setGeolocationDatabasePath(dir);webView.setWebChromeClient(new MyWebChromeClient());webView.setWebViewClient(new MyWebViewClient());//对webview页面加载管理、如url重定向}@Overrideprotected void initListener() {}@Overrideprotected void initData() {//添加定位权限 相机图库权限initPermission();}private void initPermission() {if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {//SDK>=23if (!(checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED)) {if (shouldShowRequestPermissionRationale(Manifest.permission.ACCESS_COARSE_LOCATION)) {Toast.makeText(this, "请确认是否开启定位的相关权限", Toast.LENGTH_LONG).show();MySystemUtils.goToSetPermission(activity, "在设置-应用-权限中开启定位的权限，以保证功能的正常使用", REQ_SET_LOCATION);} else {requestPermissions(new String[]{Manifest.permission.CHANGE_WIFI_STATE, Manifest.permission.ACCESS_COARSE_LOCATION}, REQ_SET_LOCATION);}} else {Log.i("--", "onClick granted");onLoadData();}} else {onLoadData();}}private void onLoadData() {webView.loadUrl(url);if (!isFinishing()) {waitDialog.show();}doSpecialiSomethingAsVirtualBar();}/*** 虚拟按键-tangZd*/private void doSpecialiSomethingAsVirtualBar() {//webview-软键盘-冲突//KeyBoardListenerManager.newInstance(this).init();//华为虚拟按键冲突问题：//是否存在导航栏（虚拟功能键）if (PhoneSystemManager.AndroidWorkaround.checkDeviceHasNavigationBar(this)) {PhoneSystemManager.AndroidWorkaround.assistActivity(findViewById(android.R.id.content));ViewStub stub = (ViewStub) findViewById(R.id.view_stub);stub.inflate();View enuiStubView = this.findViewById(R.id.enuiNatView);LinearLayout.LayoutParams zLayoutParams = (LinearLayout.LayoutParams) enuiStubView.getLayoutParams();//获取虚拟功能键高度int virtualBarHeigh = PhoneSystemManager.AndroidWorkaround.getVirtualBarHeigh(this);zLayoutParams.height = virtualBarHeigh;enuiStubView.setLayoutParams(zLayoutParams);} else {//webview-软键盘-冲突KeyBoardListenerManager.newInstance(this).init();}}private class MyWebChromeClient extends WebChromeClient {//定位@Overridepublic void onGeolocationPermissionsShowPrompt(String origin, Callback callback) {callback.invoke(origin, true, true);super.onGeolocationPermissionsShowPrompt(origin, callback);}//android 5.0以后google做了支持@Overridepublic boolean onShowFileChooser(WebView webView,ValueCallback<Uri[]> filePathCallback,FileChooserParams fileChooserParams) {mUploadCallbackAboveL = filePathCallback;//take();getPermissions();return true;}//下面的这些方法会根据android的版本自动选择//android3.0以下public void openFileChooser(ValueCallback<Uri> uploadMsg) {mUploadMessage = uploadMsg;getPermissions();}//android3.0-4.0public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {mUploadMessage = uploadMsg;getPermissions();}//4.0-4.3  4.4.4(android 4.4无方法）public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {mUploadMessage = uploadMsg;getPermissions();}}private void getPermissions() {//拍照权限if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {//checkSelfPermission用来检测应用是否已经具有权限if (!(checkSelfPermission(Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED)) {if (shouldShowRequestPermissionRationale(Manifest.permission.CAMERA)) {//去设置权限(申请权限) dialogMySystemUtils.goToSetPermission(activity, getResources().getString(R.string.permission_camera), JHConstants.REQ_PERMISSION_CAMERA);} else {//进行请求单个或多个权限requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.CAMERA}, JHConstants.REQ_PERMISSION_CAMERA);}} else {//具有权限take();}} else {// < 23take();}}private class MyWebViewClient extends MyWebViewClientUtils {@Overrideprotected boolean initShouldOverrideUrlLoading(WebView view, String url) {if (url.contains("installPhoneMyOrderPF/installerOrderCallPhone.do")) {//截取 电话Map urlParamMap = UIutils.getUrlParamMap(url);installer_phone = urlParamMap.get("INSTALLER_PHONE").toString();//web 打电话webViewCall();} else if (url.contains("iosIndex/gotoIndexPage.do")) {//返回waitDialog.dismiss();WebViewInstallationActivity.this.finish();} else if (url.contains("installPhoneIndexPF/phoneLoginPage.do")) {//去登录页面startActivity(new Intent(activity, LoginActivity.class));} else if (url.contains("installPhoneIndexPF/phoneRegisterPage.do")) {//去认证页面startActivity(new Intent(activity, IdentifyActivity.class));} else if (url.contains("kuaiQianJAZH5Pay/toPayPage.do")) {//去快钱支付页面Map urlParamMap = UIutils.getUrlParamMap(url);String order_id = urlParamMap.get("ORDER_ID").toString();//快钱支付Intent webviewkuaiqian = new Intent(activity, WebViewKuaiqianPayActivity.class);webviewkuaiqian.putExtra("pay_type", "web");webviewkuaiqian.putExtra("out_trade_no", order_id);startActivity(webviewkuaiqian);} else if (url.contains("submitToPayOrder")) {//待支付 去支付Map urlParamMap = UIutils.getUrlParamMap(url);userid = urlParamMap.get("USER_ID").toString();ServiceApi.getUrlParammap(NetUtils.H5_URL_WEBTOPAYPAGE, urlParamMap, new MyString2Callback() {@Overridepublic void onError(Call call, Exception e) {ToastUtils.showInternetErrorToast();}@Overridepublic void onResponse(Call call, String s) {String PAY_user_id = "PAY_" + userid;try {JSONObject jsonObject = new JSONObject(s);code = jsonObject.getInt("code");dataMap = jsonObject.getString("dataMap");JSONObject pay_user_id = jsonObject.getJSONObject(PAY_user_id);out_trade_no = pay_user_id.getString("out_trade_no");order_type = jsonObject.getString("order_type");} catch (JSONException e) {e.printStackTrace();}if (0 == code) {ZFBUtils zfbUtils = new ZFBUtils(WebViewInstallationActivity.this, dataMap);zfbUtils.payV2(new ZFBUtils.Pay_ZFB_Pay_Listener() {@Overridepublic void onPaySuccess(PayResult payResult) {ToastUtils.showToast("支付成功");webView.loadUrl(ServiceApi.getPaySuccessToDetail(userid, out_trade_no));}@Overridepublic void onPayError(PayResult payResult) {String s1 = payResult.toString();ToastUtils.showToast("支付失败");}});} else if (-1 == code) {ToastUtils.showToast("操作失败");}}});} else {return false;}return true;}@Overrideprotected void initOnPageStarted(WebView view, String url, Bitmap favicon) {gobackurl = url;if (!isFinishing()) {waitDialog.show();}}@Overrideprotected void initOnPageFinished(WebView view, String url) {waitDialog.dismiss();}@Overrideprotected void initOnReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {waitDialog.dismiss();}}//web 打电话private void webViewCall() {// 检查是否获得了权限（Android6.0运行时权限）if (ContextCompat.checkSelfPermission(WebViewInstallationActivity.this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {// 没有获得授权，申请授权if (ActivityCompat.shouldShowRequestPermissionRationale(WebViewInstallationActivity.this, Manifest.permission.CALL_PHONE)) {// 返回值：//如果app之前请求过该权限,被用户拒绝, 这个方法就会返回true.//如果用户之前拒绝权限的时候勾选了对话框中”Don’t ask again”的选项,那么这个方法会返回false.// 如果设备策略禁止应用拥有这条权限, 这个方法也返回false.// 弹窗需要解释为何需要该权限，再次请求授权Toast.makeText(WebViewInstallationActivity.this, "请授权！", Toast.LENGTH_LONG).show();// 帮跳转到该应用的设置界面，让用户手动授权Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);Uri uri = Uri.fromParts("package", getPackageName(), null);intent.setData(uri);startActivity(intent);} else {// 不需要解释为何需要该权限，直接请求授权ActivityCompat.requestPermissions(WebViewInstallationActivity.this, new String[]{Manifest.permission.CALL_PHONE}, MY_PERMISSIONS_REQUEST_CALL_PHONE);}} else {// 已经获得授权，可以打电话CallPhone();}}private void CallPhone() {if (TextUtils.isEmpty(installer_phone)) {// 提醒用户// 注意：在这个匿名内部类中如果用this则表示是View.OnClickListener类的对象，// 所以必须用MainActivity.this来指定上下文环境。Toast.makeText(WebViewInstallationActivity.this, "号码不能为空！", Toast.LENGTH_SHORT).show();} else {// 拨号：激活系统的拨号组件Intent intent = new Intent(); // 意图对象：动作 + 数据intent.setAction(Intent.ACTION_CALL); // 设置动作Uri data = Uri.parse("tel:" + installer_phone); // 设置数据intent.setData(data);startActivity(intent); // 激活Activity组件}}// 处理权限申请的回调@Overridepublic void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {switch (requestCode) {case MY_PERMISSIONS_REQUEST_CALL_PHONE: {//电话if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {// 授权成功，继续打电话CallPhone();} else {// 授权失败！Toast.makeText(this, "授权失败！", Toast.LENGTH_LONG).show();}break;}case REQ_SET_LOCATION: {//定位Boolean grantResultBoolean = false;for (int grantResult : grantResults) {grantResultBoolean = (grantResult == PackageManager.PERMISSION_GRANTED);if (!grantResultBoolean) {break;}}if (grantResultBoolean) {//通过onLoadData();} else {MySystemUtils.goToSetPermission(activity, "在设置-应用-权限中开启定位的权限，以保证功能的正常使用", REQ_SET_LOCATION);}break;}case JHConstants.REQ_PERMISSION_CAMERA: {//相机相册boolean isAllow = false;for (int result : grantResults) {if (PackageManager.PERMISSION_GRANTED == result) {isAllow = true;} else {isAllow = false;}}if (isAllow) {take();} else {MySystemUtils.goToSetPermission(activity, getResources().getString(R.string.permission_notice_storage_and_camera), JHConstants.REQ_PERMISSION_CAMERA);}break;}}}/*** 以下是webview的照片上传时候，用于在网页打开android图库文件*/@Overridepublic void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data); //图库的图片 data != null, 拍照的图片时 data == nullif (requestCode == FILECHOOSER_RESULTCODE) {if (null == mUploadMessage && null == mUploadCallbackAboveL)return;Uri result = data == null || resultCode != RESULT_OK ? null : data.getData();if (mUploadCallbackAboveL != null) {//android 5.0以后try {onActivityResultAboveL(requestCode, resultCode, data);} catch (IOException e) {e.printStackTrace();}} else if (mUploadMessage != null) {//android 5.0以前if (result != null) {//图库的图片try {String path = getPath(getApplicationContext(), result);Uri uri = Uri.fromFile(new File(path));Bitmap bitmapformuri = PhotoUtils.getBitmapFormUri(activity, uri);bitmap2uri = PhotoUtils.bitmap2uri(activity, bitmapformuri);mUploadMessage.onReceiveValue(bitmap2uri);} catch (IOException e) {e.printStackTrace();}} else {//拍照的图片//此处要设为null，否则在未选择图片的情况下，依然会出现上传空白文件，后台做了Uri 路径流是否可用判断
//                    imageUri = null;mUploadMessage.onReceiveValue(imageUri);}mUploadMessage = null;}}}//针对5.0的结果回调@SuppressWarnings("null")@TargetApi(Build.VERSION_CODES.LOLLIPOP)private void onActivityResultAboveL(int requestCode, int resultCode, Intent data) throws IOException {if (requestCode != FILECHOOSER_RESULTCODE || mUploadCallbackAboveL == null) {return;}Uri[] results = null;if (resultCode == Activity.RESULT_OK) {if (data == null) {results = new Uri[]{imageUri};} else {String dataString = data.getDataString();ClipData clipData = data.getClipData();if (clipData != null) {results = new Uri[clipData.getItemCount()];for (int i = 0; i < clipData.getItemCount(); i++) {ClipData.Item item = clipData.getItemAt(i);results[i] = item.getUri();}}if (dataString != null)results = new Uri[]{Uri.parse(dataString)};}}if (results != null) {Uri[] compressResults = new Uri[results.length];for (int i = 0; i < results.length; i++) {Uri result = results[i];Bitmap bitmapFormUri = PhotoUtils.getBitmapFormUri(activity, result);bitmap2uri = PhotoUtils.bitmap2uri(activity, bitmapFormUri);compressResults[i] = bitmap2uri;}mUploadCallbackAboveL.onReceiveValue(compressResults);mUploadCallbackAboveL = null;} else {//此处要设为null，否则在未选择图片的情况下，依然会出现上传空白文件，results = null;mUploadCallbackAboveL.onReceiveValue(results);mUploadCallbackAboveL = null;}return;}//take方法private void take() {File imageStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "MyApp");// Create the storage directory if it does not existif (!imageStorageDir.exists()) {imageStorageDir.mkdirs();}File file = new File(imageStorageDir + File.separator + "IMG_" + String.valueOf(System.currentTimeMillis()) + ".jpg");//设定图片的uri路径imageUri = Uri.fromFile(file);final List<Intent> cameraIntents = new ArrayList<Intent>();//调用相机的intentfinal Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);//获取包管理器（就是包含了整个清单文件，其中包括application，activity）final PackageManager packageManager = getPackageManager();//查询相机intent的activity，ResolveInfo其实就是activity节点final List<ResolveInfo> listCam = packageManager.queryIntentActivities(captureIntent, 0);//进行遍历for (ResolveInfo res : listCam) {//获取list中的元素，就activity，就是根据activity拿到相机的包名final String packageName = res.activityInfo.packageName;//将相机的intent 赋给新的intentfinal Intent i = new Intent(captureIntent);//重新设置当前intent的Component  （写全包名）i.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name));i.setPackage(packageName);i.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);cameraIntents.add(i);}//这个是文档内容，包含image，音视频Intent i = new Intent(Intent.ACTION_GET_CONTENT);//添加分类i.addCategory(Intent.CATEGORY_OPENABLE);//类型为图片i.setType("image/*");//开始创建跳转应用的对话框，可以自己设置dialog样式，也可以像下面这样，同时创建包含多个//intent的对话框，但样式不好控制，只能由系统默认，比如在4.4.4的模拟器上样式，图片见末尾Intent chooserIntent = Intent.createChooser(i, "选择图片");//Image Chooser//添加额外初始相机intent，但要序列化chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, cameraIntents.toArray(new Parcelable[]{}));WebViewInstallationActivity.this.startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE);}//由于4.4以后content后面不再表示路径，以下方法专为4.4以后路径问题的解决@TargetApi(Build.VERSION_CODES.KITKAT)public static String getPath(final Context context, final Uri uri) {final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;// DocumentProviderif (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {// ExternalStorageProviderif (isExternalStorageDocument(uri)) {final String docId = DocumentsContract.getDocumentId(uri);final String[] split = docId.split(":");final String type = split[0];if ("primary".equalsIgnoreCase(type)) {return Environment.getExternalStorageDirectory() + "/" + split[1];}// TODO handle non-primary volumes}// DownloadsProviderelse if (isDownloadsDocument(uri)) {final String id = DocumentsContract.getDocumentId(uri);final Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));return getDataColumn(context, contentUri, null, null);}// MediaProviderelse if (isMediaDocument(uri)) {final String docId = DocumentsContract.getDocumentId(uri);final String[] split = docId.split(":");final String type = split[0];Uri contentUri = null;if ("image".equals(type)) {contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;} else if ("video".equals(type)) {contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;} else if ("audio".equals(type)) {contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;}final String selection = "_id=?";final String[] selectionArgs = new String[]{split[1]};return getDataColumn(context, contentUri, selection, selectionArgs);}}// MediaStore (and general)else if ("content".equalsIgnoreCase(uri.getScheme())) {return getDataColumn(context, uri, null, null);}// Fileelse if ("file".equalsIgnoreCase(uri.getScheme())) {return uri.getPath();}return null;}/*** Get the value of the data column for this Uri. This is useful for* MediaStore Uris, and other file-based ContentProviders.** @param context       The context.* @param uri           The Uri to query.* @param selection     (Optional) Filter used in the query.* @param selectionArgs (Optional) Selection arguments used in the query.* @return The value of the _data column, which is typically a file path.*/public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {Cursor cursor = null;final String column = "_data";final String[] projection = {column};try {cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);if (cursor != null && cursor.moveToFirst()) {final int column_index = cursor.getColumnIndexOrThrow(column);return cursor.getString(column_index);}} finally {if (cursor != null) cursor.close();}return null;}/*** @param uri The Uri to check.* @return Whether the Uri authority is ExternalStorageProvider.*/public static boolean isExternalStorageDocument(Uri uri) {return "com.android.externalstorage.documents".equals(uri.getAuthority());}/*** @param uri The Uri to check.* @return Whether the Uri authority is DownloadsProvider.*/public static boolean isDownloadsDocument(Uri uri) {return "com.android.providers.downloads.documents".equals(uri.getAuthority());}/*** @param uri The Uri to check.* @return Whether the Uri authority is MediaProvider.*/public static boolean isMediaDocument(Uri uri) {return "com.android.providers.media.documents".equals(uri.getAuthority());}@Overridepublic Resources getResources() {Resources res = super.getResources();Configuration config = new Configuration();config.setToDefaults();res.updateConfiguration(config, res.getDisplayMetrics());return res;}@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {// TODO Auto-generated method stubif (keyCode == KeyEvent.KEYCODE_BACK && webView.canGoBack()) {if (gobackurl.contains("installPhoneIndexPF/phoneIndexPage.do")) {waitDialog.dismiss();WebViewInstallationActivity.this.finish();} else if (gobackurl.contains("installPhoneMyOrderPF/phoneMyOrderPage.do")) {waitDialog.dismiss();WebViewInstallationActivity.this.finish();} else if (gobackurl.contains("installPhonePersonCenterPF/phonePersonIndexPage.do")) {waitDialog.dismiss();WebViewInstallationActivity.this.finish();} else {webView.goBack();}return true;} else {waitDialog.dismiss();finish();}return super.onKeyDown(keyCode, event);}@Overrideprotected void onDestroy() {super.onDestroy();if (webView != null) {webView.setWebViewClient(null);webView.setWebChromeClient(null);webView.loadDataWithBaseURL(null, "", "text/html", "utf-8", null);webView.clearHistory();webView.destroy();webView = null;}}
}

/*** Created by LiJinWei on 2018/1/22.* 调用方式为：KeyBoardListenerManager.newInstance(this).init();* 出现华为虚拟按键冲突问题：* 解决方案使用下面此类，此类主要作为封装处理特殊手机的工具类。*/
public class PhoneSystemManager {public static final String SYS_EMUI = "sys_emui";// 华为public static final String SYS_MIUI = "sys_miui";// 小米public static final String SYS_FLYME = "sys_flyme";// 魅族public static final String SYS_NORMAL = "sys_normal";// 一般市面手机private static final String KEY_MIUI_VERSION_CODE = "ro.miui.ui.version.code";private static final String KEY_MIUI_VERSION_NAME = "ro.miui.ui.version.name";private static final String KEY_MIUI_INTERNAL_STORAGE = "ro.miui.internal.storage";private static final String KEY_EMUI_API_LEVEL = "ro.build.hw_emui_api_level";private static final String KEY_EMUI_VERSION = "ro.build.version.emui";private static final String KEY_EMUI_CONFIG_HW_SYS_VERSION = "ro.confg.hw_systemversion";public static String getTelPhoneSystem() {String SYS = SYS_NORMAL;try {Properties prop = new Properties();prop.load(new FileInputStream(new File(Environment.getRootDirectory(), "build.prop")));if (prop.getProperty(KEY_MIUI_VERSION_CODE, null) != null|| prop.getProperty(KEY_MIUI_VERSION_NAME, null) != null|| prop.getProperty(KEY_MIUI_INTERNAL_STORAGE, null) != null) {SYS = SYS_MIUI;//小米} else if (prop.getProperty(KEY_EMUI_API_LEVEL, null) != null|| prop.getProperty(KEY_EMUI_VERSION, null) != null|| prop.getProperty(KEY_EMUI_CONFIG_HW_SYS_VERSION, null) != null) {SYS = SYS_EMUI;//华为} else if (getMeizuFlymeOSFlag().toLowerCase().contains("flyme")) {SYS = SYS_FLYME;//魅族}} catch (IOException e) {e.printStackTrace();return SYS;}return SYS;}public static String getMeizuFlymeOSFlag() {return getSystemProperty("ro.build.display.id", "");}private static String getSystemProperty(String key, String defaultValue) {try {Class<?> clz = Class.forName("android.os.SystemProperties");Method get = clz.getMethod("get", String.class, String.class);return (String) get.invoke(clz, key, defaultValue);} catch (Exception e) {}return defaultValue;}/*** 设置透明状态栏目* setMiuiStatusBarDarkMode(this, true);* setMeizuStatusBarDarkIcon(this, true);**/public static boolean setMiuiStatusBarDarkMode(Activity activity, boolean darkmode) {Class<? extends Window> clazz = activity.getWindow().getClass();try {int darkModeFlag = 0;Class<?> layoutParams = Class.forName("android.view.MiuiWindowManager$LayoutParams");Field field = layoutParams.getField("EXTRA_FLAG_STATUS_BAR_DARK_MODE");darkModeFlag = field.getInt(layoutParams);Method extraFlagField = clazz.getMethod("setExtraFlags", int.class, int.class);extraFlagField.invoke(activity.getWindow(), darkmode ? darkModeFlag : 0, darkModeFlag);return true;} catch (Exception e) {e.printStackTrace();}return false;}public static boolean setMeizuStatusBarDarkIcon(Activity activity, boolean dark) {boolean result = false;if (activity != null) {try {WindowManager.LayoutParams lp = activity.getWindow().getAttributes();Field darkFlag = WindowManager.LayoutParams.class.getDeclaredField("MEIZU_FLAG_DARK_STATUS_BAR_ICON");Field meizuFlags = WindowManager.LayoutParams.class.getDeclaredField("meizuFlags");darkFlag.setAccessible(true);meizuFlags.setAccessible(true);int bit = darkFlag.getInt(null);int value = meizuFlags.getInt(lp);if (dark) {value |= bit;} else {value &= ~bit;}meizuFlags.setInt(lp, value);activity.getWindow().setAttributes(lp);result = true;} catch (Exception e) {}}return result;}/*** 处理华为手机虚拟按键和底部导航遮挡问题* 出现原因-* getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);* getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);* 加：* -android::fitsSystemWindows="true"* 去除-FLAG_TRANSLUCENT_NAVIGATION* -仍旧不行使用本类-在setContentView(……* if (AndroidWorkaround.checkDeviceHasNavigationBar(this))* {* AndroidWorkaround.assistActivity(findViewById(android.R.id.content));* }*/public static class AndroidWorkaround {public static void assistActivity(View content) {new AndroidWorkaround(content);}private View mChildOfContent;private int usableHeightPrevious;private ViewGroup.LayoutParams frameLayoutParams;private AndroidWorkaround(View content) {mChildOfContent = content;mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {public void onGlobalLayout() {possiblyResizeChildOfContent();}});frameLayoutParams = mChildOfContent.getLayoutParams();}private void possiblyResizeChildOfContent() {int usableHeightNow = computeUsableHeight();if (usableHeightNow != usableHeightPrevious) {frameLayoutParams.height = usableHeightNow;mChildOfContent.requestLayout();usableHeightPrevious = usableHeightNow;}}private int computeUsableHeight() {Rect r = new Rect();mChildOfContent.getWindowVisibleDisplayFrame(r);return (r.bottom);}/*** 获取虚拟功能键高度*/public static int getVirtualBarHeigh(Context context) {int vh = 0;WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);Display display = windowManager.getDefaultDisplay();DisplayMetrics dm = new DisplayMetrics();try {@SuppressWarnings("rawtypes")Class c = Class.forName("android.view.Display");@SuppressWarnings("unchecked")Method method = c.getMethod("getRealMetrics", DisplayMetrics.class);method.invoke(display, dm);vh = dm.heightPixels - windowManager.getDefaultDisplay().getHeight();} catch (Exception e) {e.printStackTrace();}return vh;}//是否存在导航栏（虚拟功能键）public static boolean checkDeviceHasNavigationBar(Context context) {boolean hasNavigationBar = false;Resources rs = context.getResources();int id = rs.getIdentifier("config_showNavigationBar", "bool", "android");if (id > 0) {hasNavigationBar = rs.getBoolean(id);}try {Class systemPropertiesClass = Class.forName("android.os.SystemProperties");Method m = systemPropertiesClass.getMethod("get", String.class);String navBarOverride = (String) m.invoke(systemPropertiesClass, "qemu.hw.mainkeys");if ("1".equals(navBarOverride)) {hasNavigationBar = false;} else if ("0".equals(navBarOverride)) {hasNavigationBar = true;}} catch (Exception e) {}return hasNavigationBar;}//NavigationBar状态是否是显示public static boolean isNavigationBarShow(Context context) {Activity mContext = (Activity) context;if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {Display display = mContext.getWindowManager().getDefaultDisplay();Point size = new Point();Point realSize = new Point();display.getSize(size);display.getRealSize(realSize);return realSize.y != size.y;} else {boolean menu = ViewConfiguration.get(context).hasPermanentMenuKey();boolean back = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK);if (menu || back) {return false;} else {return true;}}}}
}

/*** Created by LiJinWei on 2018/1/22.* webview-软键盘-冲突* 由于项目中WebView输入数据，软键盘不会顶上布局，遮盖住页面，* 使用下边此类解决冲突后出现底部导航栏被遮挡的问题。*/
public class KeyBoardListenerManager {private Activity activity;private View mChildOfContent;private int usableHeightPrevious;private FrameLayout.LayoutParams frameLayoutParams;private static KeyBoardListenerManager keyBoardListener;public static KeyBoardListenerManager newInstance(Activity activity) {keyBoardListener = new KeyBoardListenerManager(activity);return keyBoardListener;}public KeyBoardListenerManager(Activity activity) {super();// TODO Auto-generated constructor stubthis.activity = activity;}public void init() {FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);mChildOfContent = content.getChildAt(0);mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {public void onGlobalLayout() {possiblyResizeChildOfContent();}});frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();}private void possiblyResizeChildOfContent() {int usableHeightNow = computeUsableHeight();if (usableHeightNow != usableHeightPrevious) {int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();int heightDifference = usableHeightSansKeyboard - usableHeightNow;if (heightDifference > (usableHeightSansKeyboard / 4)) {// keyboard probably just became visibleframeLayoutParams.height = usableHeightSansKeyboard - heightDifference;} else {// keyboard probably just became hiddenframeLayoutParams.height = usableHeightSansKeyboard;}mChildOfContent.requestLayout();usableHeightPrevious = usableHeightNow;}}private int computeUsableHeight() {Rect r = new Rect();mChildOfContent.getWindowVisibleDisplayFrame(r);return (r.bottom - r.top);}}

这里面有个photoUtils,已经封装好了各种调用,简单好用

/*** Created by LiJinWei on 2018/1/31.*/
public class PhotoUtils {private static final String TAG = "PhotoUtils";/*** @param activity    当前activity* @param imageUri    拍照后照片存储路径* @param requestCode 调用系统相机请求码*/public static void takePicture(Activity activity, Uri imageUri, int requestCode) {//调用系统相机Intent intentCamera = new Intent();if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {intentCamera.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); //添加这一句表示对目标应用临时授权该Uri所代表的文件}intentCamera.setAction(MediaStore.ACTION_IMAGE_CAPTURE);//将拍照结果保存至photo_file的Uri中，不保留在相册中intentCamera.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);if (activity != null) {activity.startActivityForResult(intentCamera, requestCode);}}/*** @param activity    当前activity* @param requestCode 打开相册的请求码*/public static void openPic(Activity activity, int requestCode) {Intent photoPickerIntent = new Intent(Intent.ACTION_GET_CONTENT);photoPickerIntent.setType("image/*");activity.startActivityForResult(photoPickerIntent, requestCode);}/*** @param activity    当前activity* @param orgUri      剪裁原图的Uri* @param desUri      剪裁后的图片的Uri* @param aspectX     X方向的比例* @param aspectY     Y方向的比例* @param width       剪裁图片的宽度* @param height      剪裁图片高度* @param requestCode 剪裁图片的请求码*/public static void cropImageUri(Activity activity, Uri orgUri, Uri desUri, int aspectX, int aspectY, int width, int height, int requestCode) {Intent intent = new Intent("com.android.camera.action.CROP");if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);}intent.setDataAndType(orgUri, "image/*");intent.putExtra("crop", "true");intent.putExtra("aspectX", aspectX);intent.putExtra("aspectY", aspectY);intent.putExtra("outputX", width);intent.putExtra("outputY", height);intent.putExtra("scale", true);//将剪切的图片保存到目标Uri中intent.putExtra(MediaStore.EXTRA_OUTPUT, desUri);intent.putExtra("return-data", false);intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());intent.putExtra("noFaceDetection", true);activity.startActivityForResult(intent, requestCode);}/*** 读取uri所在的图片** @param uri      图片对应的Uri* @param mContext 上下文对象* @return 获取图像的Bitmap*/public static Bitmap getBitmapFromUri(Uri uri, Context mContext) {try {
//            Bitmap bitmap = MediaStore.Images.Media.getBitmap(mContext.getContentResolver(), uri);Bitmap bitmapFormUri = getBitmapFormUri(mContext, uri);return bitmapFormUri;} catch (Exception e) {e.printStackTrace();return null;}}/*** 通过uri获取图片并进行压缩** @param uri*/public static Bitmap getBitmapFormUri(Context ac, Uri uri) throws FileNotFoundException, IOException {InputStream input = ac.getContentResolver().openInputStream(uri);BitmapFactory.Options onlyBoundsOptions = new BitmapFactory.Options();onlyBoundsOptions.inJustDecodeBounds = true;onlyBoundsOptions.inDither = true;//optionalonlyBoundsOptions.inPreferredConfig = Bitmap.Config.ARGB_8888;//optionalBitmapFactory.decodeStream(input, null, onlyBoundsOptions);input.close();int originalWidth = onlyBoundsOptions.outWidth;int originalHeight = onlyBoundsOptions.outHeight;if ((originalWidth == -1) || (originalHeight == -1)) {return null;}//图片分辨率以480x800为标准float hh = 1280f;//这里设置高度为800ffloat ww = 720f;//这里设置宽度为480f//缩放比。由于是固定比例缩放，只用高或者宽其中一个数据进行计算即可int be = 1;//be=1表示不缩放if (originalWidth > originalHeight && originalWidth > ww) {//如果宽度大的话根据宽度固定大小缩放be = (int) (originalWidth / ww);} else if (originalWidth < originalHeight && originalHeight > hh) {//如果高度高的话根据宽度固定大小缩放be = (int) (originalHeight / hh);}if (be <= 0) {be = 1;}//比例压缩BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();bitmapOptions.inSampleSize = be;//设置缩放比例bitmapOptions.inDither = true;//optionalbitmapOptions.inPreferredConfig = Bitmap.Config.ARGB_8888;//optionalinput = ac.getContentResolver().openInputStream(uri);Bitmap bitmap = BitmapFactory.decodeStream(input, null, bitmapOptions);input.close();return compressImage(bitmap);//再进行质量压缩}/*** 质量压缩方法** @param image* @return*/public static Bitmap compressImage(Bitmap image) {ByteArrayOutputStream baos = new ByteArrayOutputStream();image.compress(Bitmap.CompressFormat.JPEG, 100, baos);//质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中int options = 100;while (baos.toByteArray().length / 1024 > 512) {  //循环判断如果压缩后图片是否大于100kb,大于继续压缩baos.reset();//重置baos即清空baos//第一个参数 ：图片格式 ，第二个参数： 图片质量，100为最高，0为最差  ，第三个参数：保存压缩后的数据的流image.compress(Bitmap.CompressFormat.JPEG, options, baos);//这里压缩options%，把压缩后的数据存放到baos中options -= 10;//每次都减少10}byte[] bytes = baos.toByteArray();ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());//把压缩后的数据baos存放到ByteArrayInputStream中Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);//把ByteArrayInputStream数据生成图片return bitmap;}/*** bitmap 转 uri* @param c* @param b* @return*/public static Uri bitmap2uri(Context c, Bitmap b) {File path = new File(c.getCacheDir() + File.separator + "IMG_" + String.valueOf(System.currentTimeMillis()) + ".jpg");try {OutputStream os = new FileOutputStream(path);b.compress(Bitmap.CompressFormat.JPEG, 100, os);os.close();return Uri.fromFile(path);} catch (Exception ignored) {}return null;}/*** @param context 上下文对象* @param uri     当前相册照片的Uri* @return 解析后的Uri对应的String* 专为Android4.4设计的从Uri获取文件绝对路径，以前的方法已不好使*/@SuppressLint("NewApi")public static String getPath(final Context context, final Uri uri) {final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;String pathHead = "file:///";// DocumentProviderif (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {// ExternalStorageProviderif (isExternalStorageDocument(uri)) {final String docId = DocumentsContract.getDocumentId(uri);final String[] split = docId.split(":");final String type = split[0];if ("primary".equalsIgnoreCase(type)) {return pathHead + Environment.getExternalStorageDirectory() + "/" + split[1];}}// DownloadsProviderelse if (isDownloadsDocument(uri)) {final String id = DocumentsContract.getDocumentId(uri);final Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));return pathHead + getDataColumn(context, contentUri, null, null);}// MediaProviderelse if (isMediaDocument(uri)) {final String docId = DocumentsContract.getDocumentId(uri);final String[] split = docId.split(":");final String type = split[0];Uri contentUri = null;if ("image".equals(type)) {contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;} else if ("video".equals(type)) {contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;} else if ("audio".equals(type)) {contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;}final String selection = "_id=?";final String[] selectionArgs = new String[]{split[1]};return pathHead + getDataColumn(context, contentUri, selection, selectionArgs);}}// MediaStore (and general)else if ("content".equalsIgnoreCase(uri.getScheme())) {return pathHead + getDataColumn(context, uri, null, null);}// Fileelse if ("file".equalsIgnoreCase(uri.getScheme())) {return pathHead + uri.getPath();}return null;}/*** Get the value of the data column for this Uri. This is useful for* MediaStore Uris, and other file-based ContentProviders.** @param context       The context.* @param uri           The Uri to query.* @param selection     (Optional) Filter used in the query.* @param selectionArgs (Optional) Selection arguments used in the query.* @return The value of the _data column, which is typically a file path.*/private static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {Cursor cursor = null;final String column = "_data";final String[] projection = {column};try {cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);if (cursor != null && cursor.moveToFirst()) {final int column_index = cursor.getColumnIndexOrThrow(column);return cursor.getString(column_index);}} finally {if (cursor != null) {cursor.close();}}return null;}/*** @param uri The Uri to check.* @return Whether the Uri authority is ExternalStorageProvider.*/private static boolean isExternalStorageDocument(Uri uri) {return "com.android.externalstorage.documents".equals(uri.getAuthority());}/*** @param uri The Uri to check.* @return Whether the Uri authority is DownloadsProvider.*/private static boolean isDownloadsDocument(Uri uri) {return "com.android.providers.downloads.documents".equals(uri.getAuthority());}/*** @param uri The Uri to check.* @return Whether the Uri authority is MediaProvider.*/private static boolean isMediaDocument(Uri uri) {return "com.android.providers.media.documents".equals(uri.getAuthority());}}

OK ! ! ! 到这里相信大家对WebView及所遇到的一些坑都有一定的了解，希望对你有帮助。给我点赞

Android WebView及WebView的神坑之旅相关推荐

android webview mailto,Webview email link (mailto)
问题 I have a view and view the site has malito code to send email. When I open the link opens in an e ...
android webview详情,Android中的WebView详细介绍
Android中WebView的详细解释: 1. 概念: WebView(网络视图)能加载显示网页,可以将其视为一个浏览器.它使用了WebKit渲染引擎加载显示网页. 2. 使用方法: (1).实例化 ...
android动态设置错误页面,Android中替换WebView加载网页失败时的页面
我们用webView去请求一个网页链接的时候,如果请求网页失败或无网络的情况下,它会返回给我们这样一个页面,如下图所示: 上面这个页面就是系统自带的页面,你觉得是不是很丑?反正小编本人觉得非常丑,很难 ...
android学习之WebView
2019独角兽企业重金招聘Python工程师标准>>> WebView是android.webkit包下的一个组件,能用来显示网页. WebView默认是不带地址栏和加进度条的,单单 ...
Android开发之WebView的开发使用（源代码分享）
如果我们想提供一个web应用程序(或只是一个网页)作为客户端应用程序的一部分,我们可以使用WebView.WebView类是Android的视图类的扩展,它允许您显示web页面的一部分活动布局.担它不 ...
解决 android 高低版本 webView 里内容自适应屏幕的终极方法
解决 android 高低版本 webView 里内容自适应屏幕的终极方法参考文章: (1)解决 android 高低版本 webView 里内容自适应屏幕的终极方法 (2)https://ww ...
Android中脱离WebView使用WebSocket实现群聊和推送功能
WebSocket是Web2.0时代的新产物,用于弥补HTTP协议的某些不足,不过他们之间真实的关系是兄弟关系,都是对socket的进一步封装,其目前最直观的表现就是服务器推送和聊天功能.更多知识参考 ...
Chromium on Android: 认识Chromium WebView
Android KitKat一项重要的更新就是WebView采用Chromium/Blink渲染引擎,本文简要的叙述了新版WebView的主要特性.需要进一步改进的地方以及WebView的代码结构等. ...
android 代码浏览,Webview实现android简单的浏览器实例代码
WebView是Android中一个非常实用的组件,它和Safai.Chrome一样都是基于Webkit网页渲染引擎,可以通过加载HTML数据的方式便捷地展现软件的界面,下面通过本文给大家介绍Webv ...

Android WebView及WebView的神坑之旅

WebView的一些神坑

第一个神坑：权限的添加

第二个神坑：Android端 webview根本不能让h5自己调用,ios是可以的。

第三个神坑：WebchromClient的openFileChooser()只调用了一次

第四个神坑：android 7.0的FileProvider的坑

第五个神坑：WebView软键盘冲突

第六个神坑：H5页面加载地图

贴上自己的代码：

Android WebView及WebView的神坑之旅相关推荐

最新文章

热门文章

Android WebView及WebView的神坑之旅

WebView的一些神坑

第一个神坑：权限的添加

第二个神坑：Android端 webview根本不能让h5自己调用,ios是可以的。

第三个神坑：WebchromClient的openFileChooser()只调用了一次

第四个神坑 ：android 7.0的FileProvider的坑

第五个神坑：WebView软键盘冲突

第六个神坑：H5页面加载地图

贴上自己的代码：

Android WebView及WebView的神坑之旅相关推荐

最新文章

热门文章

第四个神坑：android 7.0的FileProvider的坑