Develop Reference

download a text-file from Webserver using Asynctask

/**
* Downloading file in background thread
* */
#Override
protected String doInBackground(String... f_url) {
int count;
try {
String root = Environment.getExternalStorageDirectory().toString(); // "/storage/emulated/0"
System.out.println("Downloading");
URL url = new URL(f_url[0]); //http://xxx.168.2.200/tmp/bsp1.txt;
URLConnection conection = url.openConnection();
conection.connect();
// getting file length
int lenghtOfFile = conection.getContentLength();
// input stream to read file - with 8k buffer
InputStream input = new BufferedInputStream(url.openStream(), 8192);
// Output stream to write file
OutputStream output = new FileOutputStream(fileNameDaten);
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
// writing data to file
output.write(data, 0, count);
}
// flushing output
output.flush();
// closing streams
output.close();
input.close();
} catch (Exception e) {
String fel=e.getMessage();
Log.e("Error: ", e.getMessage());
}
return null;
}
/**
* After completing background task
* **/
#Override
protected void onPostExecute(String file_url) {
System.out.println("Downloaded");
}
}
doInBackground is running until "conection.connect();"
After about 3 minutes the app will continue with an exception:
"Failed to connect to /xxx.168.2.200:80"
In principle, I can access the web server's HTML pages with my mobile phone.
My question: What does the error message mean and how can I fix the error?

networkSecurityConfig : not added to manifest, how to formulate ?
app targets android 9, API 28 only partially installed
I will use the app only for local adresses
Follows manifest:enter code here
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="de.wicki.pdftextapplication">
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_INTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_INTERNAL_STORAGE" />
<uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION" />
<application
android:usesCleartextTraffic="true"
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".UploadToServer"></activity>
</application>
</manifest>

File provider used in sending email attachment keeps crashing

I am trying to send an email upon button click with an attachment stored in internal storage. I tried following this tutorial in implementing a file provider, however every time I try running the app and pressing the button the app crashes and stops working.
I am lost for why that may be. Below is the relevant code:
Manifest:
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.READ_INTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<provider
android:name="android.support.v4.content.FileProvider"
android:grantUriPermissions="true"
android:exported="false"
android:authorities="${applicationId}">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/filepaths"/>
</provider>
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
filepaths.xml
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<paths>
<cache-path name="cache" path="/" />
<files-path name= "files" path="/" />
</paths>
</PreferenceScreen>
MainActivity.java
Button emailBtn = (Button) findViewById(R.id.button);
main = findViewById(R.id.main);//email form button
emailBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Bitmap b = Screenshot.takescreenshotOfRootView(main);
ImageView programLogo = (ImageView) findViewById(R.id.imageView);
programLogo.setImageBitmap(b);
File filePath = new File(loadImageFromStorage(saveToInternalStorage(b)), "profile.jpg");
Intent intent = new Intent(Intent.ACTION_SEND, Uri.fromParts(
"mailto","myemail#gmail.com", null));
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
Uri uri = (Uri) FileProvider.getUriForFile(MainActivity.this, BuildConfig.APPLICATION_ID, filePath);
intent.setDataAndType(uri, "application/jpg");
String subject = "please work";
intent.putExtra(Intent.EXTRA_SUBJECT, subject);
intent.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(intent, "Choose an Email client :"));
}
});
}
private String saveToInternalStorage(Bitmap bitmapImage) {
ContextWrapper cw = new ContextWrapper(getApplicationContext());
File directory = cw.getDir("imageDir", Context.MODE_PRIVATE);
File mypath = new File(directory, "profile.jpg");
FileOutputStream fos = null;
try {
fos = new FileOutputStream(mypath);
bitmapImage.compress(Bitmap.CompressFormat.PNG, 100, fos);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return directory.getAbsolutePath();
}
private String loadImageFromStorage(String path) {
File f = new File(path, "profile.jpg");
return f.getAbsolutePath();
}
This is the error I get:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.myapplication234567, PID: 5272
java.lang.IllegalArgumentException: Failed to find configured root that contains /data/data/com.example.myapplication234567/app_imageDir/profile.jpg
at android.support.v4.content.FileProvider$SimplePathStrategy.getUriForFile(FileProvider.java:739)
at android.support.v4.content.FileProvider.getUriForFile(FileProvider.java:418)
at com.example.myapplication234567.MainActivity$1.onClick(MainActivity.java:64)
at android.view.View.performClick(View.java:6913)
at android.view.View.performClickInternal(View.java:6890)
at android.view.View.access$3200(View.java:792)
at android.view.View$PerformClick.run(View.java:27158)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:209)
at android.app.ActivityThread.main(ActivityThread.java:7021)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:486)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:872)

Your message contains this path which appears incorrect: /data/data/com.example.myapplication234567/app_imageDir/profile.jpg/profile.jpg
try catches are your friend.

Cannot open PDF in Android Studio

I am developing an app in API 27, I have a problem in opening a PDF from the asset folder. I have tried lots of different approaches, but still not successful.
When the PDF opens, a blank black screen appears. I checked the file.exist() return false in all steps it returns 'false'.
I really need help about this topic. In addition, I tried both internal and external storage. Also tried different intent tag. But still no luck.
Here is the function I've used.
private void openPDFFiles(String fileName) //fileName is the pdf file name which is keep in assets folder. ex file.pdf
{
AssetManager assetManager = getApplicationContext().getAssets();
InputStream in = null;
OutputStream out = null;
File imagePath = new File(getFilesDir(), "Videos");
File file = new File(imagePath, "1.pdf");
try {
in = assetManager.open(fileName);
out = openFileOutput(file.getName(), MODE_PRIVATE);
copyFile(in, out);
in.close();
in = null;
out.flush();
out.close();
out = null;
} catch (Exception e) {
System.out.println(e);
}
try {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(FileProvider.getUriForFile(getApplicationContext(), "com.administrator.siemens.android.fileprovider", file), "application/pdf");
//intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
//intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
//intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
//intent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(intent);
} catch (RuntimeException ex) {
Toast.makeText(Document.this, "There's no PDF Reader found in your device", Toast.LENGTH_SHORT).show();
}
private void copyFile(InputStream in, OutputStream out) throws IOException {
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
System.out.println("1222222222");
}
manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.administrator.siemens">
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="#drawable/me"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.administrator.siemens.android.fileprovider"
android:grantUriPermissions="true"
android:exported="false">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/filepath" />
</provider>
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
filepath.xml:
<paths>
<files-path name="my_docs" path="Videos/"/>
</paths>
Really thanks!, if anyone can help me.

Android: Saving a file to the SD card

This is my first Android application I'm making, so I'm a bit lost on what the terms are for everything.
I'm trying to copy a file I have in my /raw/ directory to the root of my SD card.
Currently, my (used Stackoverflow, didn't write this fully myself) code looks like this:
btnWriteSDFile.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
try {
File myFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath(), "fileName.docx");
myFile.createNewFile();
Toast.makeText(v.getContext(),"Wrote line", Toast.LENGTH_SHORT).show();
FileOutputStream fOut = new FileOutputStream(myFile);
OutputStreamWriter myOutWriter =new OutputStreamWriter(fOut);
myOutWriter.append("testFile");
myOutWriter.close();
fOut.close();
Toast.makeText(v.getContext(),"Done writing SD 'mysdfile.txt'", Toast.LENGTH_SHORT).show();
}
catch (Exception e)
{
Toast.makeText(v.getContext(), e.getMessage(),Toast.LENGTH_SHORT).show();
}
}
});
I get the error: "open failed; EACCES (Permission Denied)".
My Manifest looks like this:
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permisson.READ_EXTERNAL_STORAGE" />
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
Clarification to avoid duplication:
Besides the fact that I get this error: how can I write a /raw/file.docx file to my SD card root?

According to this documentation you have to add the uses permission inside and immediate to <manifest> tag
<manifest>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permisson.READ_EXTERNAL_STORAGE" />
...
<application>
...
<activity>
...
</activity>
</application>
</manifest>
like this
<manifest>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permisson.READ_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
this should work for copying file
InputStream in = getResources().openRawResource(R.raw.fileNameYourGoingToCopy);
String path = Environment.getExternalStorageDirectory() + "/anyFolder" + File.separator + fileNameWithExtension;
FileOutputStream out = new FileOutputStream(path);
byte[] buff = new byte[1024];
int read = 0;
try {
while ((read = in.read(buff)) > 0) {
out.write(buff, 0, read);
}
} finally {
in.close();
out.close();
}

Ringtone to specific contact

Edited:1
I'm making an app with sounds and implementing a bit of code I came across the following error to set the sound to a specific contact
this is the code :
Button b7 = (Button)findViewById(R.id.b7);
b7.setOnLongClickListener(new View.OnLongClickListener() {
public boolean onLongClick(View v) {
{
if (click){
cp.showAtLocation(v, Gravity.CENTER, 0, 0);
cp.update(0,0,500,500);
click=false;
}else{
cp.dismiss();
click=true;
}}
return click;}});
b7.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v){
File folder = new File(Environment.getExternalStorageDirectory() + "/Bizzsound/");
boolean success = false;
if (!folder.exists()) {
success = folder.mkdirs();
}
if (!success) {
} else {
}
File direct = new File("/sdcard/Bizzsound/");
if (!direct.exists()) {
direct.mkdirs();
}
byte[] buffer=null;
InputStream fIn = getBaseContext().getResources().openRawResource(R.raw.b1);
File dir1 = new File ("/sdcard/Bizzsound/");
File f1 = new File(dir1, String.format("b1.mp3"));
ByteArrayOutputStream bos = new ByteArrayOutputStream();
int size=0;
try {
size = fIn.available();
buffer = new byte[size];
fIn.read(buffer);
fIn.close();
} catch (IOException e) {
// TODO Auto-generated catch block
}
try {
FileOutputStream fos = new FileOutputStream(f1);
fos.write(buffer);
fos.flush();
fos.close();
bos.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
File k = new File("/sdcard/Bizzsound/", "b1.mp3");
ContentValues values = new ContentValues();
values.put(MediaStore.MediaColumns.DATA, k.getAbsolutePath());
values.put(MediaStore.MediaColumns.TITLE, "b1.mp3");
values.put(MediaStore.MediaColumns.MIME_TYPE, "audio/mp3");
values.put(AudioColumns.ARTIST, "artist");
values.put(AudioColumns.IS_RINGTONE, true);
values.put(AudioColumns.IS_NOTIFICATION, true);
values.put(AudioColumns.IS_ALARM, true);
values.put(AudioColumns.IS_MUSIC, false);
Intent intent = new Intent(Intent.ACTION_PICK,
ContactsContract.Contacts.CONTENT_URI);
startActivityForResult(intent, PICK_CONTACT);
mpButton1 = MediaPlayer.create(getBaseContext(),R.raw.b1);
mpButton1.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mpButton1) {
// TODO Auto-generated method stub
mpButton1.start();
mpButton1.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer mpButton1) {
mpButton1.release();
};
});
}
});
}});
}
#Override
public void onActivityResult(int reqCode, int resultCode, Intent data) {
super.onActivityResult(reqCode, resultCode, data);
switch (reqCode) {
case (PICK_CONTACT):
if (resultCode == Activity.RESULT_OK) {
Uri contactData = data.getData();
Cursor c = managedQuery(contactData, null, null, null, null);
if (c.moveToFirst()) {
String id = c
.getString(c.getColumnIndexOrThrow(ContactsContract.Contacts._ID));
Uri localUri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_URI, id);
File k = new File("/sdcard/Bizzsound/", "b1.mp3");
ContentValues localContentValues = new ContentValues();
String hasPhone = c.getString(c.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER));
if (hasPhone.equalsIgnoreCase("1")) {
Cursor phones = getContentResolver().query
(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,null,ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = " + id, null, null);
phones.moveToFirst();
String cNumber = phones.getString(phones //error at this line
.getColumnIndex("b1.mp3"));
System.out.println("number is:" + cNumber);
}
String name = c.getString(c.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
String SDCardRoot1 = (Environment.getExternalStorageDirectory() + "/b1.mp3");
localContentValues.put(MediaStore.MediaColumns.DATA, k.getAbsolutePath());
localContentValues.put(MediaStore.MediaColumns.TITLE,"b1.mp3");
localContentValues.put(MediaStore.MediaColumns.MIME_TYPE,"audio/*");
localContentValues.put(MediaStore.Audio.Media.ARTIST, "");
localContentValues.put(MediaStore.Audio.Media.IS_RINGTONE, true);
localContentValues.put(AudioColumns.IS_NOTIFICATION, true);
localContentValues.put(AudioColumns.IS_ALARM, true);
localContentValues.put(AudioColumns.IS_MUSIC, false);
localContentValues.put(ContactsContract.Data.RAW_CONTACT_ID, id);
localContentValues.put(ContactsContract.Data.CUSTOM_RINGTONE, SDCardRoot1);
getContentResolver().update(localUri, localContentValues,
null, null);
Toast.makeText(this, "Ringtone assigned to: " + name, 0).show();
}
}
break;
}
}
}
Now the phone freezes when receiving the call from the contact and getting this error:
the process com.android.phone has been stopped
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="org.bizzsound1"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
<uses-permission android:name="android.permission.GET_TASKS"/>
<uses-permission android:name="android.permission.WRITE_SETTINGS" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />
<uses-permission android:name="android.permission.CHANGE_CONFIGURATION" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme"
android:largeHeap="true" >
<activity
android:name="org.bizzsound1.MainActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<action android:name="android.intent.action.SEND"/>
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="org.bizzsound1.menu"
android:label="#string/app_name"
android:screenOrientation="portrait" >
<intent-filter>
<action android:name="org.bizzsound1.MENU" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity android:name="org.bizzsound1.Disclamer"
android:screenOrientation="portrait">
</activity>
<activity android:name="com.startapp.android.eula.EULAActivity"
android:theme="#android:style/Theme.Translucent"
android:configChanges="keyboard|keyboardHidden|orientation" />
<activity android:name="com.startapp.android.publish.list3d.List3DActivity"
android:taskAffinity="altervista.org.gapplication1.AppWall"
android:theme="#android:style/Theme" />
<activity android:name="com.startapp.android.publish.AppWallActivity"
android:theme="#android:style/Theme.Translucent" android:taskAffinity="altervista.org.gapplication1.AppWall"
android:configChanges="orientation|keyboardHidden" />
<activity android:name="com.google.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"/>
</application>
</manifest>