詳解Android WebView的input上傳照片的兼容問題
問題
前幾天接到的一個需求,是關(guān)于第三方理財產(chǎn)品的H5上傳照片問題。
對方說他們的新的需求,需要接入方配合上傳資產(chǎn)照片的需求,測試之后發(fā)現(xiàn)我們這邊的app端,IOS端上傳沒有問題,而Android端則點擊沒有任何反應(yīng)。
對方H5調(diào)用的方式是通過<input type='file' accept='image/*'/>的方式調(diào)用,本來以為這個問題很簡單,就是app端沒有設(shè)置相機權(quán)限,造成的點擊無反應(yīng)情況,而實際上加了之后發(fā)現(xiàn),并非簡單的權(quán)限問題。
解決問題
因為Android的版本碎片問題,很多版本的WebView都對喚起函數(shù)有不同的支持。
我們需要重寫WebChromeClient下的openFileChooser()(5.0及以上系統(tǒng)回調(diào)onShowFileChooser())。我們通過Intent在openFileChooser()中喚起系統(tǒng)相機和支持Intent的相關(guān)app。
在系統(tǒng)相機或者相關(guān)app中一頓操作之后,當返回app的時候,我們在onActivityResult()中將選擇好的圖片通過ValueCallback的onReceiveValue方法返回給WebView。
附上代碼:
1、首先是重寫各個版本的WebChromeClient的支持
webView.setWebChromeClient(new WebChromeClient() {
//For Android 3.0+
public void openFileChooser(ValueCallback<Uri> uploadMsg) {
selectImage();
mUM = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("*/*");
MyBaseWebViewActivity.this.startActivityForResult(Intent.createChooser(i, "File Chooser"), FCR);
}
// For Android 3.0+, above method not supported in some android 3+ versions, in such case we use this
public void openFileChooser(ValueCallback uploadMsg, String acceptType) {
selectImage();
mUM = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("*/*");
MyBaseWebViewActivity.this.startActivityForResult(
Intent.createChooser(i, "File Browser"),
FCR);
}
//For Android 4.1+
public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture) {
selectImage();
mUM = uploadMsg;
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("*/*");
MyBaseWebViewActivity.this.startActivityForResult(Intent.createChooser(i, "File Chooser"), MyBaseWebViewActivity.FCR);
}
//For Android 5.0+
public boolean onShowFileChooser(
WebView webView, ValueCallback<Uri[]> filePathCallback,
WebChromeClient.FileChooserParams fileChooserParams) {
selectImage();
if (mUMA != null) {
mUMA.onReceiveValue(null);
}
mUMA = filePathCallback;
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(MyBaseWebViewActivity.this.getPackageManager()) != null) {
File photoFile = null;
try {
photoFile = createImageFile();
takePictureIntent.putExtra("PhotoPath", mCM);
} catch (IOException ex) {
Log.e(TAG, "Image file creation failed", ex);
}
if (photoFile != null) {
mCM = "file:" + photoFile.getAbsolutePath();
filePath = photoFile.getAbsolutePath();
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
} else {
takePictureIntent = null;
}
}
Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);
contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);
contentSelectionIntent.setType("*/*");
Intent[] intentArray;
if (takePictureIntent != null) {
intentArray = new Intent[]{takePictureIntent};
} else {
intentArray = new Intent[0];
}
Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);
chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent);
chooserIntent.putExtra(Intent.EXTRA_TITLE, "Image Chooser");
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentArray);
startActivityForResult(chooserIntent, FCR);
return true;
}
});
2、選完照片之后
/**
* 打開圖庫,同時處理圖片
*/
private void selectImage() {
compressPath = Environment.getExternalStorageDirectory().getPath() + "/QWB/temp";
File file = new File(compressPath);
if (!file.exists()) {
file.mkdirs();
}
compressPath = compressPath + File.separator + "compress.png";
File image = new File(compressPath);
if (image.exists()) {
image.delete();
}
}
// Create an image file
private File createImageFile() throws IOException {
@SuppressLint("SimpleDateFormat") String timeStamp = DateUtils.nowTimeDetail();
String imageFileName = "img_" + timeStamp + "_";
File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
return File.createTempFile(imageFileName, ".jpg", storageDir);
}
private String mCM;
private String filePath = "";
private ValueCallback<Uri> mUM;
private ValueCallback<Uri[]> mUMA;
private final static int FCR = 1;
String compressPath = "";
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
if (Build.VERSION.SDK_INT >= 21) {
Uri[] results = null;
//Check if response is positive
if (resultCode == Activity.RESULT_OK) {
if (requestCode == FCR) {
if (null == mUMA) {
return;
}
if (intent == null) {
//Capture Photo if no image available
if (mCM != null) {
// results = new Uri[]{Uri.parse(mCM)};
results = new Uri[]{afterChosePic(filePath, compressPath)};
}
} else {
String dataString = intent.getDataString();
if (dataString != null) {
results = new Uri[]{Uri.parse(dataString)};
LogUtil.d("tag", intent.toString());
// String realFilePath = getRealFilePath(Uri.parse(dataString));
// results = new Uri[]{afterChosePic(realFilePath, compressPath)};
}
}
}
}
mUMA.onReceiveValue(results);
mUMA = null;
} else {
if (requestCode == FCR) {
if (null == mUM) return;
Uri result = intent == null || resultCode != RESULT_OK ? null : intent.getData();
mUM.onReceiveValue(result);
mUM = null;
}
}
}
/**
* 選擇照片后結(jié)束
*/
private Uri afterChosePic(String oldPath, String newPath) {
File newFile;
try {
newFile = FileUtils.compressFile(oldPath, newPath);
} catch (Exception e) {
e.printStackTrace();
newFile = null;
}
return Uri.fromFile(newFile);
}
3、工具類
public class FileUtils {
/**
* 把圖片壓縮到200K
*
* @param oldpath
* 壓縮前的圖片路徑
* @param newPath
* 壓縮后的圖片路徑
* @return
*/
public static File compressFile(String oldpath, String newPath) {
Bitmap compressBitmap = FileUtils.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 = FileUtils.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);
}
/**
* 旋轉(zhuǎn)圖片
* @param angle
* @param bitmap
* @return Bitmap
*/
public static Bitmap rotaingImageView(int angle , Bitmap bitmap) {
//旋轉(zhuǎn)圖片 動作
Matrix matrix = new Matrix();;
matrix.postRotate(angle);
System.out.println("angle2=" + angle);
// 創(chuàng)建新的圖片
Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0,
bitmap.getWidth(), bitmap.getHeight(), matrix, true);
return resizedBitmap;
}
/**
* 讀取圖片屬性:旋轉(zhuǎn)的角度
* @param path 圖片絕對路徑
* @return degree旋轉(zhuǎn)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;
}
/**
* 把字節(jié)數(shù)組保存為一個文件
*
* @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;
}
/**
* 圖片壓縮
*
* @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 = 400;
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;//
}
Log.i("scale", "scal ="+ scale);
opts.inJustDecodeBounds = false;
opts.inSampleSize = scale;
Bitmap bm = BitmapFactory.decodeFile(fPath, opts).copy(Bitmap.Config.ARGB_8888, false);
return bm;
}
/**
* 創(chuàng)建目錄
* @param path
*/
public static void setMkdir(String path)
{
File file = new File(path);
if(!file.exists())
{
file.mkdirs();
Log.e("file", "目錄不存在 創(chuàng)建目錄 ");
}else{
Log.e("file", "目錄存在");
}
}
/**
* 獲取目錄名稱
* @param url
* @return FileName
*/
public static String getFileName(String url)
{
int lastIndexStart = url.lastIndexOf("/");
if(lastIndexStart!=-1)
{
return url.substring(lastIndexStart+1, url.length());
}else{
return null;
}
}
/**
* 刪除該目錄下的文件
*
* @param path
*/
public static void delFile(String path) {
if (!TextUtils.isEmpty(path)) {
File file = new File(path);
if (file.exists()) {
file.delete();
}
}
}
}
4、需要注意的問題
在打release包的時候,因為混淆的問題,點擊又會沒有反應(yīng),這是因為openFileChooser()是系統(tǒng)api,所以需要在混淆是不混淆該方法。
-keepclassmembers class * extends android.webkit.WebChromeClient{
public void openFileChooser(...);
}
當點擊拍照之后,如果相機是橫屏拍照的話,當拍照結(jié)束之后跳回app的時候,會導(dǎo)致app端當前的webView頁面銷毀并重新打開,需要在androidManifest.xml中當前Activity添加:
android:configChanges="orientation|keyboardHidden|screenSize"
以上就是本文的全部內(nèi)容,希望對大家的學(xué)習(xí)有所幫助,也希望大家多多支持腳本之家。
- Android中的windowSoftInputMode屬性詳解
- android 使用uinput模擬輸入設(shè)備的方法
- Android WebView 不支持 H5 input type="file" 解決方法
- Android 數(shù)據(jù)存儲之 FileInputStream 工具類及FileInputStream類的使用
- Android編程開發(fā)之EditText中inputType屬性小結(jié)
- Android WebView支持input file啟用相機/選取照片功能
- Android網(wǎng)頁H5 Input選擇相機和系統(tǒng)相冊
- Android自定義PasswordInputView密碼輸入
- Android InputMethodManager輸入法簡介
- 從"Show?tabs"了解Android?Input系統(tǒng)
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