首页 > 代码库 > android 之 webView 显示h5 执行选择图片或者拍照功能
android 之 webView 显示h5 执行选择图片或者拍照功能
开发工具是 android studio SDK版本是 4.3
实现过程基本是这样
h5中调用手机选择文件图片的代码是：
<input accept="image/*" capture="camera" id="imgFile" name="imgFile" type="file">
然后给webView 设置WebChromeClient WebChromeClient 主要处理解析，渲染网页等浏览器做的事情
设置完毕后 重写WebChromeClient 的openFileChooser方法即可实现h5调用手选择文体了。
h5中调用摄像头的代码是：
<input accept="image/*" capture="camera" id="imgFile" name="imgFile" type="file">
用安卓的 webView 控件来显示h5网页
然后给webView 设置WebChromeClient WebChromeClient 主要处理解析，渲染网页等浏览器做的事情
设置完毕后 重写WebChromeClient 的openFileChooser方法即可实现h5调用手机摄像头了。
但是这个方法的使用却不简单，这个方法是要调用webview的setWebChromeClient方法，然后重写一个WebChromeClient类。来到这一步，相信有点开发经验的同行都不难解决。问题的关键就在于，当你重写WebChromeClient这个类的时候会发现，根本就没有openFileChooser这个方法，那要怎么重写呢？是不是意味着这个方法其实行不通？于是再次翻查资料，发现原来这个方法居然是隐藏方法，并不不存在显性的继承重写关系。
最后，我发现要使用这个方法，还得自己继承WebChromeClient这个类把openFileChooser(ValueCallback<Uri> uploadFile)这个方法给写出来，代码如下：
activity_main01.xml 如下
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" > <WebView android:id="@+id/webView01" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_alignParentLeft="true" android:layout_alignParentTop="true"/></RelativeLayout>
代码如下
package example.beisun.com.myapplication02;import android.annotation.SuppressLint;import android.annotation.TargetApi;import android.app.Activity;import android.content.ClipData;import android.content.ComponentName;import android.content.ContentUris;import android.content.Context;import android.content.Intent;import android.content.pm.PackageManager;import android.content.pm.ResolveInfo;import android.database.Cursor;import android.graphics.Bitmap;import android.net.Uri;import android.os.Build;import android.os.Bundle;import android.os.Environment;import android.os.Parcelable;import android.provider.DocumentsContract;import android.provider.MediaStore;import android.webkit.ValueCallback;import android.webkit.WebChromeClient;import android.webkit.WebSettings;import android.webkit.WebView;import android.webkit.WebViewClient;import java.io.File;import java.util.ArrayList;import java.util.List;/** * 可以选择文件且可以拍照 */@TargetApi(19)@SuppressLint("NewApi")public class MainActivity extends Activity { private WebView mWebView; //private String TMP_URL = "http://laodongjianguan.chanlytech.com:8088/laodongjianguan/index.php/daohang/daohang/f"; private String TMP_URL = "http://cl.beisun.com/mbp/androdTest/index.html"; //private String TMP_URL = "http://192.168.1.130:8080/cims-viewcapture/afrH5/toAuthDesc.do"; 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; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main01); mWebView=(WebView) findViewById(R.id.webView01); mWebView.loadUrl(TMP_URL); mWebView.getSettings().setJavaScriptEnabled(true); mWebView.getSettings().setRenderPriority(WebSettings.RenderPriority.HIGH); WebSettings settings = mWebView.getSettings(); settings.setUseWideViewPort(true); settings.setLoadWithOverviewMode(true); settings.setJavaScriptEnabled(true); settings.setSupportZoom(true); mWebView.setWebViewClient(new WebViewClient(){ @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { // TODO Auto-generated method stub return super.shouldOverrideUrlLoading(view, url); } @Override public void onPageStarted(WebView view, String url, Bitmap favicon) { // TODO Auto-generated method stub super.onPageStarted(view, url, favicon); } @Override public void onPageFinished(WebView view, String url) { // TODO Auto-generated method stub super.onPageFinished(view, url); } }); mWebView.setWebChromeClient(new WebChromeClient(){ @Override public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) { mUploadCallbackAboveL=filePathCallback; take(); return true; } public void openFileChooser(ValueCallback<Uri> uploadMsg) { mUploadMessage=uploadMsg; take(); } public void openFileChooser(ValueCallback<Uri> uploadMsg,String acceptType) { mUploadMessage=uploadMsg; take(); } public void openFileChooser(ValueCallback<Uri> uploadMsg,String acceptType, String capture) { mUploadMessage=uploadMsg; take(); } }); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if(requestCode==FILECHOOSER_RESULTCODE) { if (null == mUploadMessage && null == mUploadCallbackAboveL) return; Uri result = data =http://www.mamicode.com/= null || resultCode != RESULT_OK ? null : data.getData(); if (mUploadCallbackAboveL != null) { onActivityResultAboveL(requestCode, resultCode, data); } else if (mUploadMessage != null) { if (result != null) { String path = getPath(getApplicationContext(), result); Uri uri = Uri.fromFile(new File(path)); mUploadMessage .onReceiveValue(uri); } else { mUploadMessage.onReceiveValue(imageUri); } mUploadMessage = null; } } } @SuppressWarnings("null") @TargetApi(Build.VERSION_CODES.BASE) private void onActivityResultAboveL(int requestCode, int resultCode, Intent data) { if (requestCode != FILECHOOSER_RESULTCODE || mUploadCallbackAboveL == null) { return; } Uri[] results = null; if (resultCode == Activity.RESULT_OK) { if (data =http://www.mamicode.com/= 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){ mUploadCallbackAboveL.onReceiveValue(results); mUploadCallbackAboveL = null; }else{ results = new Uri[]{imageUri}; mUploadCallbackAboveL.onReceiveValue(results); mUploadCallbackAboveL = null; } return; } private void take(){ File imageStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "MyApp"); // Create the storage directory if it does not exist if (! imageStorageDir.exists()){ imageStorageDir.mkdirs(); } File file = new File(imageStorageDir + File.separator + "IMG_" + String.valueOf(System.currentTimeMillis()) + ".jpg"); imageUri = Uri.fromFile(file); final List<Intent> cameraIntents = new ArrayList<Intent>(); final Intent captureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); final PackageManager packageManager = getPackageManager(); final List<ResolveInfo> listCam = packageManager.queryIntentActivities(captureIntent, 0); for(ResolveInfo res : listCam) { final String packageName = res.activityInfo.packageName; final Intent i = new Intent(captureIntent); i.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name)); i.setPackage(packageName); i.putExtra(MediaStore.EXTRA_OUTPUT, imageUri); cameraIntents.add(i); } Intent i = new Intent(Intent.ACTION_GET_CONTENT); i.addCategory(Intent.CATEGORY_OPENABLE); i.setType("image/*"); Intent chooserIntent = Intent.createChooser(i,"Image Chooser"); chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, cameraIntents.toArray(new Parcelable[]{})); MainActivity.this.startActivityForResult(chooserIntent, FILECHOOSER_RESULTCODE); } @SuppressLint("NewApi") @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; // DocumentProvider if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) { // ExternalStorageProvider if (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 } // DownloadsProvider else 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); } // MediaProvider else 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); } // File else 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()); }}
android 之 webView 显示h5 执行选择图片或者拍照功能
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