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Add Downloaded files to ListView | Click Listener on Downloaded files to open Particular App

Add Downloaded files to ListView | Click Listener on Downloaded files to open Particular App




In this post, We will add Downloaded Files to SQLite Database and then retrieve data from Sqlite and show it on a ListView. Also, we add a Click Listener on ListView item and open that Downloaded item with particular app.

To create a full WebView follow our previous posts.

For that, We create a DatabaseHelper.java class file and add a new Downloads Table and its values.

DatabaseHelper.java
 package studio.harpreet.mybrowser;  
 import android.app.ActionBar;  
 import android.content.ContentValues;  
 import android.content.Context;  
 import android.database.Cursor;  
 import android.database.sqlite.SQLiteDatabase;  
 import android.database.sqlite.SQLiteOpenHelper;  
 import android.os.strictmode.SqliteObjectLeakedViolation;  
 import android.provider.ContactsContract;  
 import androidx.annotation.Nullable;  
 import java.util.ArrayList;  
 import java.util.HashMap;  
 public class DatabaseHelper extends SQLiteOpenHelper {  
   public static final String Database_name = "Downloads.db";  
   public static final String Table_Download = "Downloads";  
   public static final String down_id = "Id_download";  
   public static final String down_title = "Title";  
   public static final String down_time = "Time";  
   public static final String down_path = "Path";  
   public DatabaseHelper(@Nullable Context context) {  
     super(context, Database_name, null, 1);  
   }  
   @Override  
   public void onCreate(SQLiteDatabase db) {  
     db.execSQL("create table " + Table_Download +" (Id_download INTEGER PRIMARY KEY AUTOINCREMENT, Title TEXT , Time TEXT, Path TEXT)");  
   }  
   @Override  
   public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {  
     sqLiteDatabase.execSQL("DROP TABLE IF EXISTS "+Table_Download);  
     onCreate(sqLiteDatabase);  
   }  
   public boolean insertDataDownload(String Title,String Time, String Path)  
   {  
     SQLiteDatabase db = this.getWritableDatabase();  
     ContentValues cv = new ContentValues();  
     cv.put(down_title,Title);  
     cv.put(down_time,Time);  
     cv.put(down_path,Path);  
     Long result = db.insert(Table_Download,null,cv);  
     if(result == -1 )  
     {  
       return false;  
     }  
     else  
     {  
       return true;  
     }  
   }  
   public ArrayList<HashMap<String,String>> ShowdataDownload()  
   {  
     SQLiteDatabase db = this.getWritableDatabase();  
     ArrayList<HashMap<String,String>> downlist = new ArrayList<>();  
     Cursor cursor = db.rawQuery("select * from "+Table_Download,null);  
     while(cursor.moveToNext())  
     {  
       HashMap<String,String> user = new HashMap<>();  
       user.put("Id_download",cursor.getString(cursor.getColumnIndex(down_id)));  
       user.put("Title",cursor.getString(cursor.getColumnIndex(down_title)));  
       user.put("Time",cursor.getString(cursor.getColumnIndex(down_time)));  
       user.put("Path",cursor.getString(cursor.getColumnIndex(down_path)));  
       downlist.add(user);  
     }  
     return downlist;  
   }  
 }  

Then We Add a Download Listener and Then create an add-data method for adding data to Database.

Use Download Listener and Add Download methods in MainActivity.java

Create a context menu or use Download Listener with WebView.

MainActivity.java
 public void DowloadDialog(final String url, final String UserAgent, String contentdisposition, String mimetype)  
   {  
     final String filename = URLUtil.guessFileName(url,contentdisposition,mimetype);  
     final AlertDialog.Builder builder = new AlertDialog.Builder(this);  
     builder.setTitle("Downloading...")  
         .setMessage("Do you want to Download "+ ' '+" "+filename+" "+' ')  
         .setPositiveButton("Yes", new DialogInterface.OnClickListener() {  
           @Override  
           public void onClick(DialogInterface dialogInterface, int i) {  
             DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));  
             String cookie = CookieManager.getInstance().getCookie(url);  
             request.addRequestHeader("Cookie",cookie);  
             request.addRequestHeader("User-Agent",UserAgent);  
             request.allowScanningByMediaScanner();  
             request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);  
             DownloadManager manager = (DownloadManager)getSystemService(DOWNLOAD_SERVICE);  
             request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,filename);  
             manager.enqueue(request);  
             SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-YYYY , hh:mm a", Locale.getDefault());  
             File path = new File(Environment.getExternalStorageDirectory() + "/" + Environment.DIRECTORY_DOWNLOADS + "/" + filename);  
             addDownload(filename,sdf.format(new Date()),String.valueOf(path));  
           }  
         })  
         .setNegativeButton("No", new DialogInterface.OnClickListener() {  
           @Override  
           public void onClick(DialogInterface dialogInterface, int i) {  
             dialogInterface.cancel();  
           }  
         })  
         .show();  
   }  
  public void addDownload(String Title,String Time,String Path)  
   {  
     String title = Title;  
     String time = Time;  
     String path = Path;  
     boolean isInserted = mydb.insertDataDownload(title,time,path);  
     if(isInserted)  
     {  
       Toast.makeText(this, "Download Added", Toast.LENGTH_SHORT).show();  
     }  
     else  
     {  
       Toast.makeText(this, "Error adding Downloads", Toast.LENGTH_SHORT).show();  
     }  
   }  

Create a new activity called Downloads.java to show List view with Downloaded file.

activity_downloads.xml


 <?xml version="1.0" encoding="utf-8"?>  
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
   xmlns:app="http://schemas.android.com/apk/res-auto"  
   android:orientation="vertical"  
   android:layout_width="fill_parent"  
   android:layout_height="fill_parent">  
   <androidx.appcompat.widget.Toolbar  
     android:id="@+id/toolbar"  
     android:layout_width="match_parent"  
     android:layout_height="?attr/actionBarSize"  
     android:background="?attr/colorPrimaryDark"  
     app:popupTheme="@style/ThemeOverlay.AppCompat.Light"  
     app:layout_scrollFlags="scroll|enterAlways|snap"  
     app:title="Downloads"  
     app:titleTextColor="@color/white">  
   </androidx.appcompat.widget.Toolbar>  
   <ListView  
     android:layout_height="wrap_content"  
     android:id="@+id/downloadlistview"  
     android:layout_width="match_parent">  
   </ListView>  
   <LinearLayout  
     android:id="@+id/emptyList"  
     android:layout_width="match_parent"  
     android:layout_height="match_parent"  
     android:layout_centerInParent="true"  
     android:gravity="center"  
     android:orientation="vertical"  
     android:visibility="gone">  
     <TextView  
       android:layout_width="wrap_content"  
       android:layout_height="wrap_content"  
       android:layout_gravity="center"  
       android:gravity="center_vertical"  
       android:text="WHOOPS"  
       android:textColor="#212121"  
       android:textSize="26sp"  
       android:textStyle="bold" />  
     <TextView  
       android:layout_width="wrap_content"  
       android:layout_height="wrap_content"  
       android:layout_gravity="center"  
       android:gravity="center"  
       android:textSize="20sp"  
       android:text="There are no Downloads at the moment"  
       android:textColor="#212121" />  
   </LinearLayout>  
 </LinearLayout>  

A custom List for ListView with 4 TextViews.

download_custom_list.xml
 <?xml version="1.0" encoding="utf-8"?>  
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  
   android:layout_width="fill_parent"  
   android:layout_height="match_parent"  
   android:orientation="vertical"  
   android:padding="5dp" >  
   <TextView  
     android:id="@+id/customiddownload"  
     android:visibility="gone"  
     android:layout_width="wrap_content"  
     android:layout_height="wrap_content"  
     android:textColor="#343434"  
     android:textSize="14sp" />  
   <TextView  
     android:id="@+id/customtitledownlaod"  
     android:layout_width="match_parent"  
     android:layout_height="wrap_content"  
     android:maxLines="2"  
     android:ellipsize="end"  
     android:textColor="#343434"  
     android:textSize="14sp" />  
   <TextView  
     android:id="@+id/customtimedownload"  
     android:layout_width="match_parent"  
     android:layout_height="wrap_content"  
     android:ellipsize="end"  
     android:maxLines="2"  
     android:layout_marginTop="35dp"  
     android:textSize="14sp" />  
   <TextView  
     android:id="@+id/custompathdownload"  
     android:layout_width="match_parent"  
     android:layout_height="wrap_content"  
     android:ellipsize="end"  
     android:maxLines="2"  
     android:layout_marginTop="60dp"  
     android:textSize="14sp" />  
 </RelativeLayout>  

Downloads.java
 package studio.harpreet.mybrowser;  
 import androidx.appcompat.app.AppCompatActivity;  
 import android.content.Intent;  
 import android.net.Uri;  
 import android.os.Bundle;  
 import android.os.Environment;  
 import android.view.View;  
 import android.webkit.MimeTypeMap;  
 import android.widget.AdapterView;  
 import android.widget.ArrayAdapter;  
 import android.widget.LinearLayout;  
 import android.widget.ListAdapter;  
 import android.widget.ListView;  
 import android.widget.SimpleAdapter;  
 import android.widget.Toast;  
 import java.io.File;  
 import java.util.ArrayList;  
 import java.util.HashMap;  
 import java.util.Map;  
 public class Downloads extends AppCompatActivity {  
   DatabaseHelper mydb;  
   ListView lview;  
   ListAdapter lviewAdapter;  
   ArrayAdapter adapter;  
   ArrayList<HashMap<String,String>> downlist;  
   LinearLayout emptylist;  
   @Override  
   protected void onCreate(Bundle savedInstanceState) {  
     super.onCreate(savedInstanceState);  
     setContentView(R.layout.activity_downloads);  
     mydb = new DatabaseHelper(this);  
     lview = findViewById(R.id.downloadlistview);  
     emptylist = findViewById(R.id.emptyList);  
     emptylist.setVisibility(View.GONE);  
     getdata();  
     lview.setOnItemClickListener(new AdapterView.OnItemClickListener() {  
       @Override  
       public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {  
         Object o = lview.getAdapter().getItem(i);  
         if(o instanceof Map)  
         {  
           Map map = (Map) o;  
           try {  
             String filename = String.valueOf(map.get("Title"));  
             String extension = filename.substring(filename.lastIndexOf(".")+1);  
             String type = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);  
             File file = new File(Environment.getExternalStorageDirectory() + "/" +  
                 Environment.DIRECTORY_DOWNLOADS + "/" + filename);  
             Uri filepath = Uri.parse(String.valueOf(file));  
             Intent in = new Intent(Intent.ACTION_VIEW);  
             in.setDataAndType(filepath,type);  
             in.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);  
             in.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);  
             startActivity(Intent.createChooser(in,"Open With: "));  
           }  
           catch (Exception e)  
           {  
             Toast.makeText(Downloads.this, e.getMessage()+"", Toast.LENGTH_SHORT).show();  
           }  
         }  
       }  
     });  
   }  
   public void getdata()  
   {  
     downlist = mydb.ShowdataDownload();  
     if(downlist.isEmpty())  
     {  
       emptylist.setVisibility(View.VISIBLE);  
       return;  
     }  
     lviewAdapter = new SimpleAdapter(Downloads.this,downlist,R.layout.download_custom_list,  
         new String[]{"Id_download","Title","Time","Path"},  
         new int[]{R.id.customiddownload,R.id.customtitledownlaod,  
             R.id.customtimedownload,R.id.custompathdownload});  
     lview.setAdapter(lviewAdapter);  
   }  
 }  

Also, we add a click listener on ListView item to open a particular app for a file.


 
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7 comments:

  1. it will be huge help, if you also tell that how i can delete an item from download page listview. And One Thing show some indication when download is not completed.
    Thanks In Advance.....

    ReplyDelete
  2. Downloaded file not showing in my app

    ReplyDelete
  3. Also app crashes when I press yes button

    ReplyDelete
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