I didn't run into any problems in the tests. However,
after launching the app, as the download occurs,
many people are experiencing the phenomenon that the app is terminated with this error.
Since the error was not implemented with my test phone,
it is difficult to correct it.
If you can help me,
I would be very grateful.
Error Code
java.lang.NullPointerException:
at android.app.WallpaperManager.setBitmap (WallpaperManager.java:2462)
at android.app.WallpaperManager.setBitmap (WallpaperManager.java:2374)
at android.app.WallpaperManager.setBitmap (WallpaperManager.java:2347)
at android.app.WallpaperManager.setBitmap (WallpaperManager.java:2313)
at com.offsong.btsquotes.Full_screen.setWallaper (Full_screen.java:384)
at com.offsong.btsquotes.Full_screen$5.onClick (Full_screen.java:196)
at android.view.View.performClick (View.java:7870)
at android.view.View.performClickInternal (View.java:7839)
at android.view.View.access$3600 (View.java:886)
at android.view.View$PerformClick.run (View.java:29363)
at android.os.Handler.handleCallback (Handler.java:883)
at android.os.Handler.dispatchMessage (Handler.java:100)
at android.os.Looper.loop (Looper.java:237)
at android.app.ActivityThread.main (ActivityThread.java:7811)
at java.lang.reflect.Method.invoke (Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1068)
Full code
package com.offsong.enhypen;
import android.Manifest;
import android.app.DownloadManager;
import android.app.WallpaperManager;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
import android.widget.MediaController;
import android.widget.ProgressBar;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import com.github.clans.fab.FloatingActionButton;
import com.google.android.gms.ads.AdListener;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
import com.google.android.gms.ads.InterstitialAd;
import com.google.android.gms.ads.MobileAds;
import com.squareup.picasso.Callback;
import com.squareup.picasso.Picasso;
import java.io.File;
import java.io.IOException;
public class Full_screen extends AppCompatActivity {
public static final String VIDEO_URL_KEY = "key";
public static final String SINGER_KEY = "singer_key";
public static final String VIDEO_TITLE_KEY = "title_key";
public static final int STORAGE_PERMISSION_REQUEST_CODE = 1;
MediaController mediaController;
ImageView videoView;
// ProgressDialog progressDialog;
ProgressBar video_loading;
Boolean isPLaying;
int duration;
int current;
String URL;
FloatingActionButton downloadBtn, shareBtn, repost, setwallpaper;
String directoryName = "Status App";
String title, finaltitle;
Boolean per = false;
File file;
private InterstitialAd mInterstitialAd;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_full_screen);
mediaController = new MediaController(this);
videoView = (ImageView) findViewById(R.id.full_screen_video_activty_id);
video_loading = (ProgressBar) findViewById(R.id.videoLoading);
downloadBtn = (FloatingActionButton) findViewById(R.id.download_ic);
shareBtn = (FloatingActionButton) findViewById(R.id.share_ic);
repost = (FloatingActionButton) findViewById(R.id.repost);
setwallpaper = (FloatingActionButton) findViewById(R.id.setWallpaper);
askPermissions();
Intent intent = getIntent();
URL = intent.getStringExtra(VIDEO_URL_KEY);
MobileAds.initialize(this, getString(R.string.admob_app_id));
AdView mAdView = findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder().build();
mAdView.loadAd(adRequest);
mInterstitialAd = new InterstitialAd(this);
mInterstitialAd.setAdUnitId(getString(R.string.banner_ad_unit_id_full));
mInterstitialAd.loadAd(new AdRequest.Builder().build());
mInterstitialAd.setAdListener(new AdListener() {
@Override
public void onAdFailedToLoad(int i) {
super.onAdFailedToLoad(i);
Log.d("ad", "onAdFailedToLoad" + " : " + String.valueOf(i));
}
@Override
public void onAdLoaded() {
}
@Override
public void onAdClosed() {
AdRequest adRequest = new AdRequest.Builder().build();
mInterstitialAd.loadAd(adRequest);
setWallaper();
}
});
title = intent.getStringExtra(VIDEO_TITLE_KEY);
finaltitle = title + ".jpeg";
file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), finaltitle);
if (URL != null) {
Picasso.get().load(URL).into(videoView, new Callback() {
@Override
public void onSuccess() {
video_loading.setVisibility(View.INVISIBLE);
}
@Override
public void onError(Exception e) {
}
});
repost.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (file.exists()) {
//File Exists};
Toast.makeText(getApplicationContext(), "Choose Any App", Toast.LENGTH_LONG).show();
shareIntent(file);
} else {
downloadFile(URL, finaltitle);
shareIntent(file);
//Toast.makeText(getApplicationContext(),"File is downloding, Click again once completed",Toast.LENGTH_LONG).show();
}
}
});
downloadBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (per) {
Toast.makeText(getApplicationContext(), "DOWNLOADING", Toast.LENGTH_LONG).show();
downloadFile(URL, finaltitle);
if (mInterstitialAd.isLoaded()) {
mInterstitialAd.show();
} else {
Log.d("TAG", "The interstitial wasn't loaded yet.");
}
} else {
Toast.makeText(getApplicationContext(), "ALLOW STORAGE ACCESS", Toast.LENGTH_LONG).show();
}
}
});
setwallpaper.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (file.exists()) {
setWallaper();
} else {
downloadFile(URL, finaltitle);
Toast.makeText(getApplicationContext(), "It is applied after watching the advertisement.", Toast.LENGTH_SHORT).show();
}
if (mInterstitialAd.isLoaded()) {
mInterstitialAd.show();
} else {
Log.d("TAG", "The interstitial wasn't loaded yet.");
}
}
});
shareBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), finaltitle);
if (file.exists()) {
//File Exists};
shareIntent(file);
} else {
downloadFile(URL, finaltitle);
shareIntent(file);
//Toast.makeText(getApplicationContext(),"File is downloding, Click again once completed",Toast.LENGTH_LONG).show();
}
}
});
}////////////ENDING
else {
Toast.makeText(getApplicationContext(), "Oops..", Toast.LENGTH_LONG).show();
}
}
@Override
protected void onPause() {
super.onPause();
}
@Override
protected void onResume() {
super.onResume();
}
@Override
protected void onStop() {
super.onStop();
}
public void downloadFile(String url, String filename) {
DownloadManager.Request dmr = new DownloadManager.Request(Uri.parse(url));
String fileName = filename;
dmr.setTitle(fileName);
dmr.setDescription("Share The Quotes With Your Friends");
dmr.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName);
dmr.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
dmr.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE);
DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
manager.enqueue(dmr);
}
public void shareIntent(File file) {
String s = String.valueOf(file);
Intent intent = new Intent(android.content.Intent.ACTION_SEND);
intent.setType("video/*");
String shareBodyText = "Download Status Videos ";
intent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Subject/Title");
intent.putExtra(Intent.EXTRA_STREAM, Uri.parse(s));
startActivity(Intent.createChooser(intent, "Choose sharing method"));
}
private void askPermissions() {
int permissionCheckStorage = ContextCompat.checkSelfPermission(this,
Manifest.permission.WRITE_EXTERNAL_STORAGE);
// we already asked for permisson & Permission granted, call camera intent
if (permissionCheckStorage == PackageManager.PERMISSION_GRANTED) {
//do what you want
per = true;
} else {
// if storage request is denied
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("You need to give permission to access storage in order to work this feature.");
builder.setNegativeButton("CANCEL", new DialogInterface.OnClickListener()
