android - 无法从 Android 10 Web 视图访问相机
问题描述
在升级到 Android 10 时，我一直在我的 Hybrid Android Web View App 中使用 onShowFileChooser 代码，因为 Android 5 或 6 停止提供对相机的访问。用户仍然可以访问存储的照片，但不再向用户提供相机选项。
我一直在使用的代码如下所示
//For Android 5.0+
public boolean onShowFileChooser (WebView webView, ValueCallback<Uri[]> filePathCallback, WebChromeClient.FileChooserParams fileChooserParams)
{
if(mUMA != null)
{
mUMA.onReceiveValue (null);
}
mUMA = filePathCallback;
Intent takePictureIntent = new Intent (MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity (MainActivity.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();
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 ("image/*");
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, FileChooserActivityCode);
return true;
}
与以下代码一起处理结果
protected void onActivityResult (int requestCode, int resultCode, Intent intent)
{
super.onActivityResult(requestCode, resultCode, intent);
if (requestCode == FileChooserActivityCode)
{
Uri[] results = null;
//Check if response is positive
if (resultCode == Activity.RESULT_OK)
{
if (null == mUMA)
{
return;
}
if (intent == null || intent.getData() == null)
{
//Capture Photo if no image available
if (mCM != null)
{
results = new Uri[]{Uri.parse(mCM)};
}
}
else
{
String dataString = intent.getDataString();
if(dataString != null)
{
results = new Uri[]{Uri.parse(dataString)};
}
}
}
mUMA.onReceiveValue(results);
mUMA = null;
}
}
我发现了如何从此链接访问相机并将 takePictureIntent 代码更改为以下内容：
if(takePictureIntent.resolveActivity(MainActivity.this.getPackageManager()) != null) {
File photoFile = null;
Uri photoUri = null;
if (isAndroidQ) {
// Android Q compatibility
photoUri = createImageUri();
mCameraUri = photoUri;
if (photoUri != null) {
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);
}
} else {
try {
photoFile = createImageFile();
takePictureIntent.putExtra("PhotoPath", mCM);
} catch (IOException ex) {
Log.e(LOG_TAG, "Image file creation failed", ex);
}
if (photoFile != null) {
mCM = "file:" + photoFile.getAbsolutePath();
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
} else {
takePictureIntent = null;
}
}
}
private Uri createImageUri()
{
String status = Environment.getExternalStorageState();
if (status.equals(Environment.MEDIA_MOUNTED))
{
return MainActivity.this.getApplicationContext().getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, new ContentValues());
}
else
{
return MainActivity.this.getApplicationContext().getContentResolver().insert(MediaStore.Images.Media.INTERNAL_CONTENT_URI, new ContentValues());
}
}
但是现在在 onActivityResult 代码中拍摄照片后，变量 mCM 为空，并且没有任何内容传递给 Web 视图。
请有人能告诉我我错过了什么吗？