我的数据库中有一个.mhtml文件作为字节数组。我已经写了下面的代码，并且在棒棒糖之前的设备中可以正常工作。但它不适用于棒棒糖和棉花糖。
码：-
String path = filepath.getAbsolutePath()+"/StudyWellAppv5/"+fname;
byte[] bytes = tblK.gethtmlFile();
try {
if (!file.exists()) {
file.createNewFile();
}
FileOutputStream fos = new FileOutputStream(file);
fos.write(bytes);
webview.loadUrl("file://" + path);
}
catch(Exception e){ e.printStackTrace();}
运行时权限代码：-
/Permission to read and write from external storage
private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static String[] PERMISSIONS_STORAGE = {
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE
};
int permission = ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.WRITE_EXTERNAL_STORAGE);
int readpermission = ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.READ_EXTERNAL_STORAGE);
if (permission != PackageManager.PERMISSION_GRANTED||readpermission != PackageManager.PERMISSION_GRANTED) {
// We don't have permission so prompt the user
ActivityCompat.requestPermissions(
getActivity(),
PERMISSIONS_STORAGE,
REQUEST_EXTERNAL_STORAGE
);
}
错误日志：
"Blocked script execution in 'file:///storage/emulated/0/StudyWellApp/2016-06-16%2001-48-42.mhtml' because the document's frame is sandboxed and the 'allow-scripts' permission is not set.", source: file:///storage/emulated/0/StudyWellApp/2016-06-16%2001-48-42.mhtml (1618)
06-16 13:48:42.571 1244-1244/com.samji.StudyWellAppv5 I/chromium: [INFO:CONSOLE(1618)] "Blocked script execution in 'file:///storage/emulated/0/StudyWellApp/2016-06-16%2001-48-42.mhtml' because the document's frame is sandboxed and the 'allow-scripts' permission is not set.", source: file:///storage/emulated/0/StudyWellApp/2016-06-16%2001-48-42.mhtml (1618)
06-16 13:48:42.598 1244-1244/com.samji.StudyWellAppv5 I/chromium: [INFO:CONSOLE(0)] "Not allowed to load local resource: file:///C:/EC2C4CD1/1_files/image002.jpg", source: file:///storage/emulated/0/StudyWellApp/2016-06-16%2001-48-42.mhtml (0)
06-16 13:48:42.599 1244-1244/com.samji.StudyWellAppv5 I/chromium: [INFO:CONSOLE(0)] "Not allowed to load local resource: file:///C:/EC2C4CD1/1_files/image004.jpg", source: file:///storage/emulated/0/StudyWellApp/2016-06-16%2001-48-42.mhtml (0)
06-16 13:48:42.599 1244-1244/com.samji.StudyWellAppv5 I/chromium: [INFO:CONSOLE(0)] "Not allowed to load local resource: file:///C:/EC2C4CD1/1_files/image006.jpg", source: file:///storage/emulated/0/StudyWellApp/2016-06-16%2001-48-42.mhtml (0)
06-16 13:48:42.671 1244-1244/com.samji.StudyWellAppv5 I/chromium: [INFO:CONSOLE(0)] "Not allowed to load local resource: file:///C:/EC2C4CD1/1_files/image008.jpg", source: file:///storage/emulated/0/StudyWellApp/2016-06-16%2001-48-42.mhtml (0)
06-16 13:49:10.182 1244-1244/com.samji.StudyWellAppv5 I/chromium: [INFO:CONSOLE(0)] "Not allowed to load local resource: file:///storage/emulated/0/StudyWellApp/2016-06-16%2001-48-42.mhtml", source: file:///storage/emulated/0/StudyWellApp/2016-06-16%2001-48-42.mhtml (0)
注意：-此代码在棒棒糖之前的设备上运行良好。它不仅对棒棒糖和棉花糖起作用。
最佳答案
您必须获得API 23（棉花糖）的运行时权限
示例代码：
public class MainActivity extends AppCompatActivity {
private static final int REQUEST_RUNTIME_PERMISSION = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//SomeStuffWhichNeedPermission(); dont call here directly wihtout permission in 6.0 do like below
checkPremission();
}
void SomeStuffWhichNeedPermission() {
// storing data code here now
String path = filepath.getAbsolutePath() + "/StudyWellAppv5/" + fname;
byte[] bytes = tblK.gethtmlFile();
try {
if (!file.exists()) {
file.createNewFile();
}
FileOutputStream fos = new FileOutputStream(file);
fos.write(bytes);
webview.loadUrl("file://" + path);
} catch (Exception e) {
e.printStackTrace();
}
}
void checkPremission() {
//select which permission you want
final String permission = Manifest.permission.WRITE_EXTERNAL_STORAGE;
// if in fragment use getActivity()
if (ContextCompat.checkSelfPermission(ActivityName.this, permission)
!= PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(ActivityName.this, permission)) {
} else {
ActivityCompat.requestPermissions(ActivityName.this, new String[]{permission}, REQUEST_CAMERA_PERMISSION);
}
} else {
// you have permission go ahead
SomeStuffWhichNeedPermission();
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode) {
case REQUEST_RUNTIME_PERMISSION:
final int numOfRequest = grantResults.length;
final boolean isGranted = numOfRequest == 1
&& PackageManager.PERMISSION_GRANTED == grantResults[numOfRequest - 1];
if (isGranted) {
// you have permission go ahead
SomeStuffWhichNeedPermission();
} else {
// you dont have permission show toast
}
break;
default:
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
}
关于android - mhtml文件无法在 Lollipop 和棉花糖的webview中正确加载/显示，但在 Lollipop 之前的设备上无法正常显示，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/37854319/