android之 h5调用系统相机和相册并显示

先上html界面的代码,放在assets里面就可以了,我也不太会html,所以随便写了点

<html lang="en"><head>    <meta charset="UTF-8">    <meta name="Generator" content="EditPlus®">    <meta name="Author" content="">    <meta name="Keywords" content="">    <meta name="Description" content="">    <title>H5页面上传手机照片title>head><body><script>function previewFile1() {        var img = document.getElementById("preview1");        // 仅限上传单张图片        var file =document.getElementById("demo1").files[0];        var text2 = document.getElementById("text2");        var reader  = new FileReader();        reader.addEventListener("load", function () {                img.src = reader.result;  // 存储在本地的图片的base64编码        }, false);        if (file) {          reader.readAsDataURL(file);        }     }     function previewFile2() {        var img2 = document.getElementById("preview2");        // 仅限上传单张图片        var file2 = document.getElementById("demo2").files[0];        var reader2  = new FileReader();        reader2.addEventListener("load", function () {                img2.src = reader2.result;  // 存储在本地的图片的base64编码        }, false);        if (file2) {          reader2.readAsDataURL(file2);        }     }script><form action="">    <p>图片1: <input type="file" id="demo1" name="uploadImg1" onchange="previewFile1()"/>p>    <p>图片2: <input type="file" id="demo2" name="uploadImg2" onchange="previewFile2()"/>p>    <img id="preview1" src="" width="100" height="100"/>    <br>    <img id="preview2" src="" width="100" height="100"/>form>body>html>

然后来看看java怎么做
主要是对webview进行操作

public void initWebView() {        WebView webview = (WebView) findViewById(R.id.act_certification_webview);        WebSettings webSettings = webview.getSettings();        //设置WebView属性，能够执行Javascript脚本        webSettings.setJavaScriptEnabled(true);        //设置可以访问文件        webSettings.setAllowFileAccess(true);        //设置支持缩放        webSettings.setBuiltInZoomControls(true);        webview.loadUrl("file:///android_asset/interact.html");        webview.setWebChromeClient(new WebChromeClient() {            @Override            public boolean onShowFileChooser(WebView webView, ValueCallback filePathCallback, FileChooserParams fileChooserParams) {//5.0+                showDialog();                mFilePathCallback = filePathCallback;                return true;            }            //openFileChooser 方法是隐藏方法            public void openFileChooser(ValueCallback uploadMsg, String acceptType, String capture) {// android 系统版本>4.1.1                showDialog();                mFilePathCallback = uploadMsg;            }            public void openFileChooser(ValueCallback uploadMsg) {//android 系统版本<3.0                showDialog();                mFilePathCallback = uploadMsg;            }            public void openFileChooser(ValueCallback uploadMsg, String acceptType) {//android 系统版本3.0+                showDialog();                mFilePathCallback = uploadMsg;            }        });    }

拍照和相册选择的弹窗

 private void showDialog() {        NiceDialog                .init()                .setLayoutId(R.layout.dialog_choose_photo)                .setConvertListener(new ViewConvertListener() {                    @Override                    public void convertView(ViewHolder holder, final BaseNiceDialog dialog) {                        holder.setOnClickListener(R.id.dialog_choose_photo_takePhoto, new View.OnClickListener() {                            @Override                            public void onClick(View v) {                                dialog.dismiss();                                autoObtainCameraPermission(1);                            }                        });                        holder.setOnClickListener(R.id.dialog_choose_photo_gallery, new View.OnClickListener() {                            @Override                            public void onClick(View v) {                                dialog.dismiss();                                autoObtainStoragePermission(1);                            }                        });                    }                })                .setDimAmount(0.5f)                .setShowBottom(false)                .setAnimStyle(R.style.popwindow_center_style)                .setMargin(30)                .setOutCancel(true)                .show(getSupportFragmentManager());    }

先检查是否有权限

    public void autoObtainCameraPermission(int type) {        this.type = type;        if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED                || ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {            if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.CAMERA)) {//                ToastUtils.showToastCenter("您已经拒绝过一次");            }            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA, Manifest.permission.READ_EXTERNAL_STORAGE}, CAMERA_PERMISSIONS_REQUEST_CODE);        } else {//有权限直接调用系统相机拍照            if (CommonUtil.hasSdcard()) {                imageUri = Uri.fromFile(fileUri);                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)                    imageUri = FileProvider.getUriForFile(mContext, mContext.getPackageName() + ".fileprovider", fileUri);//通过FileProvider创建一个content类型的Uri                PhotoUtils.takePicture(this, imageUri, CODE_CAMERA_REQUEST);            } else {                ToastUtils.showToastCenter("设备没有SD卡！");            }        }    }

收到照片的回调

 @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if (resultCode == RESULT_OK) {            if (requestCode == CODE_CAMERA_REQUEST) {//                cropImageUri = Uri.fromFile(fileCropUri);//                PhotoUtils.cropImageUri(this, imageUri, cropImageUri, 1, 1, output_X, output_Y, CODE_RESULT_REQUEST);                Bitmap bitmapFromUri = PhotoUtils.getBitmapFromUri(imageUri, this);                int bitmapDegree = getBitmapDegree(imageUri.getPath());                Bitmap bitmap = rotateBitmapByDegree(bitmapFromUri, bitmapDegree);                if (bitmap == null) {                    showToastBottom("对不起,图片不正确!");                    return;                }                try {                    File fileIcon = new File(Environment.getExternalStorageDirectory().getPath() + "/" + SystemClock.currentThreadTimeMillis() + "4.jpg");                    saveBitmapToUri(bitmap, fileIcon.getAbsolutePath());                    getbitmap(type, fileIcon.getPath(), bitmap);                } catch (IOException e) {                    showToastBottom("图片压缩异常");                }            } else if (CODE_GALLERY_REQUEST == requestCode) {                if (hasSdcard()) {//                    cropImageUri = Uri.fromFile(fileCropUri);                    Uri newUri = Uri.parse(PhotoUtils.getPath(this, data.getData()));                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {                        newUri = FileProvider.getUriForFile(this, mContext.getPackageName() + ".fileprovider", new File(newUri.getPath()));                    }                    int bitmapDegree = getBitmapDegree(newUri.getPath());                    Bitmap bitmapFromUri = PhotoUtils.getBitmapFromUri(newUri, this);                    if (bitmapFromUri == null) {                        showToastBottom("对不起,图片不正确!");                        return;                    }                    Bitmap bitmap = rotateBitmapByDegree(bitmapFromUri, bitmapDegree);                    if (bitmap == null) {                        showToastBottom("对不起,图片不正确!");                        return;                    }                    try {                        File fileIcon = new File(Environment.getExternalStorageDirectory().getPath() + "/" + SystemClock.currentThreadTimeMillis() + "4.jpg");                        saveBitmapToUri(bitmap, fileIcon.getAbsolutePath());                        getbitmap(type, fileIcon.getPath(), bitmap);                    } catch (IOException e) {                        showToastBottom("图片压缩异常");                    }//                    PhotoUtils.cropImageUri(this, newUri, cropImageUri, 1, 1, output_X, output_Y, CODE_RESULT_REQUEST);                } else {                    ToastUtils.showToastCenter("设备没有SD卡！");                }//            } else if (CODE_RESULT_REQUEST == requestCode) {//                Bitmap bitmap = PhotoUtils.getBitmapFromUri(cropImageUri, this);//                if (bitmap != null && cropImageUri != null) {//////                    getbitmap(type, cropImageUri, bitmap);//                }            }        }    }

    /**     * 读取图片的旋转的角度     *     * @param path 图片绝对路径     * @return 图片的旋转角度     */    private int getBitmapDegree(String path) {        int degree = 0;        try {            // 从指定路径下读取图片，并获取其EXIF信息            ExifInterface exifInterface = new ExifInterface(path);            // 获取图片的旋转信息            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;    }    /**     * 将图片按照某个角度进行旋转     *     * @param bm     需要旋转的图片     * @param degree 旋转角度     * @return 旋转后的图片     */    public Bitmap rotateBitmapByDegree(Bitmap bm, int degree) {        Bitmap returnBm = null;        // 根据旋转角度，生成旋转矩阵        Matrix matrix = new Matrix();        matrix.postRotate(degree);        try {            // 将原始图片按照旋转矩阵进行旋转，并得到新的图片            returnBm = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(), bm.getHeight(), matrix, true);        } catch (OutOfMemoryError e) {        }        if (returnBm == null) {            returnBm = bm;        }        if (bm != returnBm) {            bm.recycle();        }        return returnBm;    }    /**     * 把压缩后的bitmap转化为file;     *     * @param path;压缩后的file路径     */    private boolean saveBitmapToUri(Bitmap bitmap, String path)            throws IOException {        File file = new File(path);        if (file.exists()) {            if (file.delete()) {                if (!file.createNewFile()) {                    return false;                }            }        }        BufferedOutputStream outStream = new BufferedOutputStream(new FileOutputStream(file));        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, outStream);//100为压缩的品质,100为100%        outStream.flush();        outStream.close();        return true;    }

回调webview

   @Override    protected void getbitmap(int type, String imagePath, Bitmap bitmap) {        Uri uri = Uri.fromFile(new File(imagePath));        if (Build.VERSION.SDK_INT > 18) {            mFilePathCallback.onReceiveValue(new Uri[]{uri});        } else {            mFilePathCallback.onReceiveValue(uri);        }    }

来看效果图

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