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Android WebView选择图片、发送图片

WebView控件是经常用到的，如果WebView中有选择图片这种操作，光是

settings.setJavaScriptEnabled(true);

 还是不够的，还需要重写

WebChromeClient

 和

WebViewClien

初始化操作 

mWebView.setWebChromeClient(new MyWebChromeClient());
mWebView.setWebViewClient(new MyWebViewClient());

复制

代码 

private class MyWebViewClient extends WebViewClient {

        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            LogUtil.i("URL地址:" + url);
            super.onPageStarted(view, url, favicon);
        }

        @Override
        public void onPageFinished(WebView view, String url) {
            LogUtil.i("onPageFinished");
            super.onPageFinished(view, url);
        }
    }

    private ValueCallback<Uri> mUploadMessage;
    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 {

        // For Android 3.0+
        public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType) {
            if (mUploadMessage != null) return;
            mUploadMessage = uploadMsg;
            selectImage();
        }

        // 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;
    }

    private String compressPath = "";

    protected final void selectImage() {
        if (!checkSDcard())
            return;
        String[] selectPicTypeStr = {"相机", "图库"};
        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:
                                        openCamera();
                                        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) {
                mUploadMessage.onReceiveValue(null);
                mUploadMessage = null;
            }
        }).show();
    }

   private String imagePaths;
   private Uri cameraUri;

    /**
     * 打开照相机
     */
    private void openCamera() {
        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);
        File newFile = FileUtil.compressFile(f.getPath(), compressPath);
    }

    /**
     * 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() {
        FileUtil.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) {
        Cursor cursor;
        // 获取图片的路径：
        String[] proj = {MediaStore.Images.Media.DATA};
        if (null!=data){
            // 好像是android多媒体数据库的封装接口，具体的看Android文档
            cursor = managedQuery(data.getData(), proj, null, null, null);
        }else
            return null;

        if (null == cursor) {
            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")
                || path.endsWith(".jpeg") || path.endsWith(".JPEG"))) {
            File newFile = FileUtil.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 (null == mUploadMessage)
            return;
        Uri uri = null;
        if (requestCode == REQ_CAMERA) {
            afterOpenCamera();
            uri = cameraUri;
        } else if (requestCode == REQ_CHOOSE) {
            uri = afterChosePic(intent);
        }
        mUploadMessage.onReceiveValue(uri);
        mUploadMessage = null;
        super.onActivityResult(requestCode, resultCode, intent);
    }

    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if ((keyCode == KeyEvent.KEYCODE_BACK) && wbUpdate.canGoBack()) {
            wbUpdate.goBack();
            return true;
        } else {
            finish();
        }
        return super.onKeyDown(keyCode, event);
    }

复制

用到的FileUtil 

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.ExifInterface;
import android.text.TextUtils;

import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import static com.luck.picture.lib.tools.PictureFileUtils.rotaingImageView;

public class FileUtil {

    /**
     * 把图片压缩到200K
     *
     * @param oldpath 压缩前的图片路径
     * @param newPath 压缩后的图片路径
     * @return
     */
    public static File compressFile(String oldpath, String newPath) {
        Bitmap compressBitmap = decodeFile(oldpath);
        Bitmap newBitmap = ratingImage(oldpath, compressBitmap);
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        newBitmap.compress(Bitmap.CompressFormat.PNG, 100, os);
        byte[] bytes = os.toByteArray();

        File file = null;
        try {
            file = getFileFromBytes(bytes, newPath);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (newBitmap != null) {
                if (!newBitmap.isRecycled()) {
                    newBitmap.recycle();
                }
                newBitmap = null;
            }
            if (compressBitmap != null) {
                if (!compressBitmap.isRecycled()) {
                    compressBitmap.recycle();
                }
                compressBitmap = null;
            }
        }
        return file;
    }

    private static Bitmap ratingImage(String filePath, Bitmap bitmap) {
        int degree = readPictureDegree(filePath);
        return rotaingImageView(degree, bitmap);
    }

    /**
     * 读取图片属性：旋转的角度
     *
     * @param path 图片绝对路径
     * @return degree旋转的角度
     */
    public static int readPictureDegree(String path) {
        int degree = 0;
        try {
            ExifInterface exifInterface = new ExifInterface(path);
            int orientation = exifInterface.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
            switch (orientation) {
                case ExifInterface.ORIENTATION_ROTATE_90:
                    degree = 90;
                    break;
                case ExifInterface.ORIENTATION_ROTATE_180:
                    degree = 180;
                    break;
                case ExifInterface.ORIENTATION_ROTATE_270:
                    degree = 270;
                    break;
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return degree;
    }


    /**
     * 把字节数组保存为一个文件
     *
     * @param b
     * @param outputFile
     * @return
     */
    public static File getFileFromBytes(byte[] b, String outputFile) {
        File ret = null;
        BufferedOutputStream stream = null;
        try {
            ret = new File(outputFile);
            FileOutputStream fstream = new FileOutputStream(ret);
            stream = new BufferedOutputStream(fstream);
            stream.write(b);
        } catch (Exception e) {
            // log.error("helper:get file from byte process error!");
            e.printStackTrace();
        } finally {
            if (stream != null) {
                try {
                    stream.close();
                } catch (IOException e) {
                    // log.error("helper:get file from byte process error!");
                    e.printStackTrace();
                }
            }
        }
        return ret;
    }

    /**
     * 图片压缩
     *
     * @param fPath
     * @return
     */
    public static Bitmap decodeFile(String fPath) {
        BitmapFactory.Options opts = new BitmapFactory.Options();
        opts.inJustDecodeBounds = true;
        opts.inDither = false; // Disable Dithering mode
        opts.inPurgeable = true; // Tell to gc that whether it needs free
        opts.inInputShareable = true; // Which kind of reference will be used to
        BitmapFactory.decodeFile(fPath, opts);
        final int REQUIRED_SIZE = 200;
        int scale = 1;
        if (opts.outHeight > REQUIRED_SIZE || opts.outWidth > REQUIRED_SIZE) {
            final int heightRatio = Math.round((float) opts.outHeight / (float) REQUIRED_SIZE);
            final int widthRatio = Math.round((float) opts.outWidth / (float) REQUIRED_SIZE);
            scale = heightRatio < widthRatio ? heightRatio : widthRatio;
        }
        opts.inJustDecodeBounds = false;
        opts.inSampleSize = scale;
        Bitmap bm = BitmapFactory.decodeFile(fPath, opts).copy(Bitmap.Config.ARGB_8888, false);
        return bm;
    }

    /**
     * 删除该目录下的文件
     *
     * @param path
     */
    public static void delFile(String path) {
        if (!TextUtils.isEmpty(path)) {
            File file = new File(path);
            if (file.exists()) {
                file.delete();
            }
        }
    }

}

复制

主要代码来自：http://blog.csdn.net/woshinia/article/details/19030437

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