我正在尝试使用单击按钮上的Web视图下载视频文件，当我单击按钮时它开始下载但是当我检查文件管理器时，它内部没有任何内容。这是我的网址http://segoma.com/v.php?type=view&id=U5K8Q4F6DD，我必须下载视频。所以帮我解决这个问题。
我还使用webview下载检查了许多方法，但对我没有帮助。
我试过以下代码。
public class TestActivity extends Activity {
WebView webView;
String image_url;
@SuppressLint("SetJavaScriptEnabled")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_test);
if (android.os.Build.VERSION.SDK_INT > 14) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
webView = (WebView) findViewById(R.id.webView_certy);
if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
} else {
ActivityCompat.requestPermissions(this,
new String[]{
Manifest.permission.WRITE_EXTERNAL_STORAGE
}, 23
);
}
}
final String stone_barcodeno = getIntent().getStringExtra("url");
if (stone_barcodeno.equals("")) {
Toast.makeText(this, "No image for this stone", Toast.LENGTH_SHORT).show();
} else {
image_url = stone_barcodeno;
Log.d("1", image_url);
webView.loadUrl(image_url);
webView.setPadding(0, 0, 0, 0);
//webView.setInitialScale(getScale());
webView.getSettings().setBuiltInZoomControls(true);
///=========================
webView.setInitialScale(1);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setLoadWithOverviewMode(true);
webView.getSettings().setUseWideViewPort(true);
webView.setScrollBarStyle(View.SCROLLBARS_OUTSIDE_OVERLAY);
webView.setScrollbarFadingEnabled(false);
}
/* Defining a button click listener for the Download button */
View.OnClickListener downloadsListener = new View.OnClickListener() {
@Override
public void onClick(View v) {
File direct = new File(Environment.getExternalStorageDirectory() + "/abc");
if (!direct.exists()) {
if (!direct.mkdirs())
Log.w("","Failed to create dir!");
}
DownloadManager mgr = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
Uri downloadUri = Uri.parse(image_url);
DownloadManager.Request request = new DownloadManager.Request(
downloadUri);
request.setAllowedNetworkTypes(
DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE)
.setAllowedOverRoaming(false).setTitle("abc")
.setDescription("Image certi Downloading...")
.setDestinationInExternalPublicDir("/abc", stone_barcodeno + "_certi" + ".jpg");
mgr.enqueue(request);
Toast.makeText(TestActivity.this, "Image Downloaded Successfully on this Device.", Toast.LENGTH_LONG).show();
}
};
btn_download.setOnClickListener(downloadsListener);
}
}
地图演示
Mapfrag.java
public class Mapfrag extends SupportMapFragment implements OnMapReadyCallback {
// private GoogleMap mMap;
// ArrayList<LatLng> MarkerPoints;
GoogleApiClient mGoogleApiClient;
// Location mLastLocation;
// Marker mCurrLocationMarker;
// LocationRequest mLocationRequest;
private GoogleMap mMap;
private List<LocationModel> mListMarker = new ArrayList<>();
private List<ListAddress> addresslist;
String add []={"surat","bombay","pune","delhi"};
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View root = inflater.inflate(R.layout.fragment_map, null, false);
initilizeMap();
return root;
}
private void initilizeMap() {
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
checkLocationPermission();
}
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getChildFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
addresslist=new ArrayList<>();
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
// getAllDataLocationLatLng();
for (int p=0;p<add.length;p++){
LatLng ll=getLocationFromAddress(getActivity(),add[p]);
addresslist.add(new ListAddress(ll.latitude,ll.longitude));
}
//Initialize Google Play Services
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(getActivity(),
android.Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
//buildGoogleApiClient();
mMap.setMyLocationEnabled(true);
}
}
else {
// buildGoogleApiClient();
mMap.setMyLocationEnabled(true);
}
if(addresslist.size()>0){
initMarker(addresslist);
}
}
public LatLng getLocationFromAddress(Context context, String strAddress) {
Geocoder coder = new Geocoder(context);
List<Address> address;
LatLng p1 = null;
try {
// May throw an IOException
address = coder.getFromLocationName(strAddress, 5);
if (address == null) {
return null;
}
Address location = address.get(0);
p1 = new LatLng(location.getLatitude(), location.getLongitude() );
} catch (IOException ex) {
ex.printStackTrace();
}
return p1;
}
private void getAllDataLocationLatLng(){
final ProgressDialog dialog = new ProgressDialog(getActivity());
dialog.setMessage("Menampilkan data marker ..");
dialog.show();
ApiService apiService = ApiClient.getClient().create(ApiService.class);
Call<ListLocationModel> call = apiService.getAllLocation();
call.enqueue(new Callback<ListLocationModel>() {
@Override
public void onResponse(Call<ListLocationModel> call, Response<ListLocationModel> response) {
dialog.dismiss();
mListMarker = response.body().getmData();
//initMarker(mListMarker);
}
@Override
public void onFailure(Call<ListLocationModel> call, Throwable t) {
dialog.dismiss();
Toast.makeText(getActivity(), t.getMessage(), Toast.LENGTH_SHORT).show();
}
});
}
private void initMarker(List<ListAddress> listData){
//iterasi semua data dan tampilkan markernya
for (int i=0; i<listData.size(); i++){
//set latlng nya
LatLng location = new LatLng(listData.get(i).getLatutide(),listData.get(i).getLongitude());
//tambahkan markernya
mMap.addMarker(new MarkerOptions().position(location).title(add[i]));
//set latlng index ke 0
LatLng latLng = new LatLng(listData.get(0).getLatutide(),listData.get(0).getLongitude());
//lalu arahkan zooming ke marker index ke 0
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(latLng.latitude,latLng.longitude), 4));
}
}
/* protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(getActivity())
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
}
@Override
public void onConnected(Bundle bundle) {
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onLocationChanged(Location location) {
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}*/
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;
public boolean checkLocationPermission(){
if (ContextCompat.checkSelfPermission(getActivity(),
android.Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
// Asking user if explanation is needed
if (ActivityCompat.shouldShowRequestPermissionRationale(getActivity(),
android.Manifest.permission.ACCESS_FINE_LOCATION)) {
// Show an explanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
//Prompt the user once explanation has been shown
ActivityCompat.requestPermissions(getActivity(),
new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION);
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(getActivity(),
new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION);
}
return false;
} else {
return true;
}
}
@Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_LOCATION: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted. Do the
// contacts-related task you need to do.
if (ContextCompat.checkSelfPermission(getActivity(),
android.Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
if (mGoogleApiClient == null) {
// buildGoogleApiClient();
}
mMap.setMyLocationEnabled(true);
}
} else {
// Permission denied, Disable the functionality that depends on this permission.
Toast.makeText(getActivity(), "permission denied", Toast.LENGTH_LONG).show();
}
return;
}
// other 'case' lines to check for other permissions this app might request.
// You can add here other case statements according to your requirement.
}
}
}
答案 0 :(得分：0)
您可以在此行中自行设置的位置下载视频：
.setDestinationInExternalPublicDir("/abc", stone_barcodeno + "_certi" + ".jpg");
如果找不到此目录（ abc ），请将位置设置为您熟悉的位置（如下载文件夹）或使用getUriForDownloadedFile获取下载的文件目录。欲了解更多信息，请转到[本页]（https://developer.android.com/reference/android/app/DownloadManager.Request.html#setDestinationInExternalFilesDir(android.content.Context，java.lang.String，java.lang.String））。