android使用webview上传文件(支持相册和拍照)，支持最高6.0安卓系统（改进版）

来源：互联网发布：拳击实战知乎编辑：程序博客网时间：2024/06/03 14:14

首先学习 http://blog.csdn.net/woshinia/article/details/19030437 对input file的支持

1.注意

mUploadMessage.onReceiveValue(Uri.parse(""));

必须得到调用，无论用户是否选了图，否则会出现再点击不响应的情况

2.上面的参考由于比较老，不适用于安卓5.0系统，因为谷歌5.0以后对webkit做了改动，
相关API发生了变化，那么5.0的需要参考http://blog.csdn.net/earbao/article/details/50716747

汇总改进后得出我写的：（最高6.0的安卓系统都支持，已测试使用）

package com.fuiou.webviewupload;import java.io.File;import java.io.IOException;import android.app.Activity;import android.app.AlertDialog;import android.content.ContentValues;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.database.Cursor;import android.graphics.Bitmap;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.provider.MediaStore;import android.util.Log;import android.view.KeyEvent;import android.webkit.ValueCallback;import android.webkit.WebChromeClient;import android.webkit.WebView;import android.webkit.WebViewClient;import android.widget.Toast;public class MainActivity extends Activity {   public static final String TAG = "MainActivity";   ValueCallback<Uri> mUploadMessage;   ValueCallback<Uri[]> mFilePathCallback;   private WebView mWebView;   @Override   protected void onCreate(Bundle savedInstanceState) {      super.onCreate(savedInstanceState);      setContentView(R.layout.activity_main);      initView();   }   private void initView() {      mWebView = (WebView) findViewById(R.id.web_view);      mWebView.setWebChromeClient(new MyWebChromeClient());            mWebView.setWebViewClient(new MyWebViewClient(this));//    webView.loadUrl("file:///android_asset/upload_image.html");      mWebView.loadUrl("http://192.168.25.38:8001/test/2016/5/2016-5-24/index.html");   }      private class MyWebViewClient extends WebViewClient{      private Context mContext;      public MyWebViewClient(Context context){         super();         mContext = context;      }            @Override      public void onPageStarted(WebView view, String url, Bitmap favicon) {         Log.d(TAG,"URL地址:" + url);         super.onPageStarted(view, url, favicon);      }      @Override      public void onPageFinished(WebView view, String url) {         Log.i(TAG, "onPageFinished");         super.onPageFinished(view, url);      }   }      public static final int FILECHOOSER_RESULTCODE = 1;   private static final int REQ_CAMERA = FILECHOOSER_RESULTCODE+1;   private static final int REQ_CHOOSE = REQ_CAMERA+1;   private class MyWebChromeClient extends WebChromeClient {      public boolean onShowFileChooser(            WebView webView, ValueCallback<Uri[]> filePathCallback,            WebChromeClient.FileChooserParams fileChooserParams) {         if (mFilePathCallback != null) return true;         mFilePathCallback = filePathCallback;         selectImage();         return true;      }      // For Android 3.0+         public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {                 if (mUploadMessage != null) return;               mUploadMessage = uploadMsg;                  selectImage();//               Intent i = new Intent(Intent.ACTION_GET_CONTENT);//               i.addCategory(Intent.CATEGORY_OPENABLE);//               i.setType("*/*");//                   startActivityForResult( Intent.createChooser( i, "File Chooser" ), FILECHOOSER_RESULTCODE );           }            // For Android < 3.0           public void openFileChooser(ValueCallback<Uri> uploadMsg) {                  openFileChooser( uploadMsg, "" );           }           // For Android  > 4.1.1         public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {                 openFileChooser(uploadMsg, acceptType);         }   }      /**    * 检查SD卡是否存在    *     * @return    */   public final boolean checkSDcard() {      boolean flag = Environment.getExternalStorageState().equals(            Environment.MEDIA_MOUNTED);      if (!flag) {         Toast.makeText(this, "请插入手机存储卡再使用本功能",Toast.LENGTH_SHORT).show();      }      return flag;   }   String compressPath = "";      protected final void selectImage() {      if (!checkSDcard())         return;      String[] selectPicTypeStr = { "camera","photo" };      AlertDialog alertDialog = new AlertDialog.Builder(this)            .setItems(selectPicTypeStr,                  new DialogInterface.OnClickListener() {                     @Override                     public void onClick(DialogInterface dialog,                                    int which) {                        switch (which) {                           // 相机拍摄                           case 0:                              openCarcme();                              break;                           // 手机相册                           case 1:                              chosePic();                              break;                           default:                              break;                        }                        compressPath = Environment                              .getExternalStorageDirectory()                              .getPath()                              + "/fuiou_wmp/temp";                        new File(compressPath).mkdirs();                        compressPath = compressPath + File.separator                              + "compress.jpg";                     }                  }).setOnCancelListener(new DialogInterface.OnCancelListener() {               @Override               public void onCancel(DialogInterface dialogInterface) {                  if(mFilePathCallback != null){                     Uri[] uris = new Uri[1];                     uris[0] = Uri.parse("");                     mFilePathCallback.onReceiveValue(uris);                     mFilePathCallback=null;                  }else {                     mUploadMessage.onReceiveValue(Uri.parse(""));                     mUploadMessage=null;                  }               }            }).show();   }      String imagePaths;   Uri  cameraUri;   /**    * 打开照相机    */   private void openCarcme() {      Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);      imagePaths = Environment.getExternalStorageDirectory().getPath()            + "/fuiou_wmp/temp/"            + (System.currentTimeMillis() + ".jpg");      // 必须确保文件夹路径存在，否则拍照后无法完成回调      File vFile = new File(imagePaths);      if (!vFile.exists()) {         File vDirPath = vFile.getParentFile();         vDirPath.mkdirs();      } else {         if (vFile.exists()) {            vFile.delete();         }      }      cameraUri = Uri.fromFile(vFile);      intent.putExtra(MediaStore.EXTRA_OUTPUT, cameraUri);      startActivityForResult(intent, REQ_CAMERA);   }   /**    * 拍照结束后    */   private void afterOpenCamera() {      File f = new File(imagePaths);      addImageGallery(f);   }   /** 解决拍照后在相册中找不到的问题 */   private void addImageGallery(File file) {      ContentValues values = new ContentValues();      values.put(MediaStore.Images.Media.DATA, file.getAbsolutePath());      values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");      getContentResolver().insert(            MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);   }   /**    * 本地相册选择图片    */   private void chosePic() {      FileUtils.delFile(compressPath);      Intent innerIntent = new Intent(Intent.ACTION_GET_CONTENT); // "android.intent.action.GET_CONTENT"      String IMAGE_UNSPECIFIED = "image/*";      innerIntent.setType(IMAGE_UNSPECIFIED); // 查看类型      Intent wrapperIntent = Intent.createChooser(innerIntent, null);      startActivityForResult(wrapperIntent, REQ_CHOOSE);   }   /**    * 选择照片后结束    *     * @param data    */   private Uri afterChosePic(Intent data) {      // 获取图片的路径：      String[] proj = { MediaStore.Images.Media.DATA };      // 好像是android多媒体数据库的封装接口，具体的看Android文档      Cursor cursor = managedQuery(data.getData(), proj, null, null, null);      if(cursor == null ){         Toast.makeText(this, "上传的图片仅支持png或jpg格式",Toast.LENGTH_SHORT).show();         return null;      }      // 按我个人理解 这个是获得用户选择的图片的索引值      int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);      // 将光标移至开头 ，这个很重要，不小心很容易引起越界      cursor.moveToFirst();      // 最后根据索引值获取图片路径      String path = cursor.getString(column_index);      if(path != null && (path.endsWith(".png")||path.endsWith(".PNG")||path.endsWith(".jpg")||path.endsWith(".JPG"))){         File newFile = FileUtils.compressFile(path, compressPath);         return Uri.fromFile(newFile);      }else{         Toast.makeText(this, "上传的图片仅支持png或jpg格式",Toast.LENGTH_SHORT).show();      }      return null;   }   /**    * 返回文件选择    */   @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);//       mUploadMessage = null;//    }      if (null == mUploadMessage || mFilePathCallback == null)         return;      Uri uri = null;      File file = new File(cameraUri.getPath());      if(!file.exists()){         cameraUri = Uri.parse("");      }      if(requestCode == REQ_CAMERA ){         afterOpenCamera();         uri = cameraUri;      }else if(requestCode == REQ_CHOOSE){         uri = afterChosePic(intent);      }      if(mFilePathCallback != null){         Uri[] uris = new Uri[1];         uris[0] = uri;         mFilePathCallback.onReceiveValue(uris);      }else {         mUploadMessage.onReceiveValue(uri);      }      mFilePathCallback = null;      mUploadMessage = null;      super.onActivityResult(requestCode, resultCode, intent);   }      public boolean onKeyDown(int keyCode, KeyEvent event) {      if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {           mWebView.goBack();           return true;        }else{              finish();      }      return super.onKeyDown(keyCode, event);        }}

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