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 Android教程網 >> Android技術 >> 關於Android編程 >> android使用dowanloadmanager下載東西，並且獲取下載進度。

android使用dowanloadmanager下載東西，並且獲取下載進度。

編輯：關於Android編程

 

 

 
package com.koolsee.gallery; 
 
 
import java.util.ArrayList; 
import java.util.List; 
import java.util.Timer; 
import java.util.TimerTask; 
 
 
import android.app.Activity; 
import android.app.DownloadManager; 
import android.app.DownloadManager.Request; 
import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
import android.content.IntentFilter; 
import android.database.ContentObserver; 
import android.database.Cursor; 
import android.net.Uri; 
import android.os.Bundle; 
import android.os.Environment; 
import android.os.Handler; 
import android.util.Log; 
import android.view.KeyEvent; 
import android.view.MotionEvent; 
import android.view.View; 
import android.view.View.OnKeyListener; 
import android.view.View.OnTouchListener; 
import android.widget.AdapterView; 
import android.widget.AdapterView.OnItemClickListener; 
import android.widget.AdapterView.OnItemSelectedListener; 
import android.widget.Button; 
import android.widget.ImageView; 
import android.widget.TextView; 
 
 
 
 
import com.koolsee.gallery.adapter.RecommendAdapter; 
import com.koolsee.gallery.model.Recommend; 
import com.koolsee.gallery.widget.GalleryFlow; 
 
 
/**
 * 首頁
 * 
 * @author zengxiaotao
 */ 
public class testActivity extends Activity { 
 
 
    private DownloadManager dowanloadmanager = null; 
    private DownloadChangeObserver downloadObserver; 
    private long lastDownloadId = 0; 
    public static final Uri CONTENT_URI = Uri.parse("content://downloads/my_downloads"); 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
        // TODO Auto-generated method stub  
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.test); 
        String serviceString = Context.DOWNLOAD_SERVICE; 
        dowanloadmanager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE); 
 
 
        Uri uri = Uri.parse("http://commonsware.com/misc/test.mp4"); 
        Environment.getExternalStoragePublicDirectory( 
                Environment.DIRECTORY_DOWNLOADS).mkdir(); 
 
 
        lastDownloadId = dowanloadmanager.enqueue(new DownloadManager.Request(uri) 
                .setAllowedNetworkTypes( 
                        DownloadManager.Request.NETWORK_MOBILE 
                                | DownloadManager.Request.NETWORK_WIFI) 
                .setAllowedOverRoaming(false) 
                .setDestinationInExternalPublicDir( 
                        Environment.DIRECTORY_DOWNLOADS, "test.mp4")); 
         registerReceiver(receiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));  
            downloadObserver = new DownloadChangeObserver(null);     
            getContentResolver().registerContentObserver(CONTENT_URI, true, downloadObserver); 
    } 
    class DownloadChangeObserver extends ContentObserver { 
 
 
   
 
 
        public DownloadChangeObserver(Handler handler) { 
            super(handler); 
            // TODO Auto-generated constructor stub  
        } 
 
 
        @Override 
        public void onChange(boolean selfChange) { 
              queryDownloadStatus();    
        } 
 
 
    } 
     private BroadcastReceiver receiver = new BroadcastReceiver() {    
            @Override    
            public void onReceive(Context context, Intent intent) {    
                //這裡可以取得下載的id，這樣就可以知道哪個文件下載完成了。適用與多個下載任務的監聽    
                Log.v("tag", ""+intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0));   
                queryDownloadStatus();    
            }    
        };    
         
        private void queryDownloadStatus() {    
            DownloadManager.Query query = new DownloadManager.Query();    
            query.setFilterById(lastDownloadId);    
            Cursor c = dowanloadmanager.query(query);    
            if(c!=null&&c.moveToFirst()) {    
                int status = c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS));    
                 
                int reasonIdx = c.getColumnIndex(DownloadManager.COLUMN_REASON);   
                int titleIdx = c.getColumnIndex(DownloadManager.COLUMN_TITLE);   
                int fileSizeIdx =    
                  c.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES);       
                int bytesDLIdx =    
                  c.getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR);   
                String title = c.getString(titleIdx);   
                int fileSize = c.getInt(fileSizeIdx);   
                int bytesDL = c.getInt(bytesDLIdx);   
                 
                // Translate the pause reason to friendly text.    
                int reason = c.getInt(reasonIdx);   
                StringBuilder sb = new StringBuilder();   
                sb.append(title).append("\n");  
                sb.append("Downloaded ").append(bytesDL).append(" / " ).append(fileSize);   
                 
                // Display the status     
                Log.d("tag", sb.toString());   
                switch(status) {    
                case DownloadManager.STATUS_PAUSED:    
                    Log.v("tag", "STATUS_PAUSED");   
                case DownloadManager.STATUS_PENDING:    
                    Log.v("tag", "STATUS_PENDING");   
                case DownloadManager.STATUS_RUNNING:    
                    //正在下載，不做任何事情    
                    Log.v("tag", "STATUS_RUNNING");   
            
                
                    break;    
                case DownloadManager.STATUS_SUCCESSFUL:    
                    //完成    
                    Log.v("tag", "下載完成");   
//                  dowanloadmanager.remove(lastDownloadId);     
                    break;    
                case DownloadManager.STATUS_FAILED:    
                    //清除已下載的內容，重新下載    
                    Log.v("tag", "STATUS_FAILED");   
                    dowanloadmanager.remove(lastDownloadId);    
                    break;    
                }    
            }   
        }   
         
        @Override 
        protected void onDestroy() { 
            // TODO Auto-generated method stub  
            super.onDestroy(); 
              unregisterReceiver(receiver);   
              getContentResolver().unregisterContentObserver(downloadObserver); 
        } 
} 

package com.koolsee.gallery;


import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;


import android.app.Activity;
import android.app.DownloadManager;
import android.app.DownloadManager.Request;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.ContentObserver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnKeyListener;
import android.view.View.OnTouchListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

 


import com.koolsee.gallery.adapter.RecommendAdapter;
import com.koolsee.gallery.model.Recommend;
import com.koolsee.gallery.widget.GalleryFlow;


/**
 * 首頁
 *
 * @author zengxiaotao
 */
public class testActivity extends Activity {


 private DownloadManager dowanloadmanager = null;
    private DownloadChangeObserver downloadObserver;
 private long lastDownloadId = 0;
    public static final Uri CONTENT_URI = Uri.parse("content://downloads/my_downloads");
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  // TODO Auto-generated method stub
  super.onCreate(savedInstanceState);
  setContentView(R.layout.test);
  String serviceString = Context.DOWNLOAD_SERVICE;
  dowanloadmanager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);


  Uri uri = Uri.parse("http://commonsware.com/misc/test.mp4");
  Environment.getExternalStoragePublicDirectory(
    Environment.DIRECTORY_DOWNLOADS).mkdir();


  lastDownloadId = dowanloadmanager.enqueue(new DownloadManager.Request(uri)
    .setAllowedNetworkTypes(
      DownloadManager.Request.NETWORK_MOBILE
        | DownloadManager.Request.NETWORK_WIFI)
    .setAllowedOverRoaming(false)
    .setDestinationInExternalPublicDir(
      Environment.DIRECTORY_DOWNLOADS, "test.mp4"));
   registerReceiver(receiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
         downloadObserver = new DownloadChangeObserver(null); 
         getContentResolver().registerContentObserver(CONTENT_URI, true, downloadObserver);
 }
    class DownloadChangeObserver extends ContentObserver {


 


        public DownloadChangeObserver(Handler handler) {
   super(handler);
   // TODO Auto-generated constructor stub
  }


  @Override
        public void onChange(boolean selfChange) {
           queryDownloadStatus();  
        }


    }
  private BroadcastReceiver receiver = new BroadcastReceiver() {  
         @Override  
         public void onReceive(Context context, Intent intent) {  
             //這裡可以取得下載的id，這樣就可以知道哪個文件下載完成了。適用與多個下載任務的監聽 
             Log.v("tag", ""+intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0)); 
             queryDownloadStatus();  
         }  
     };  
    
     private void queryDownloadStatus() {  
         DownloadManager.Query query = new DownloadManager.Query();  
         query.setFilterById(lastDownloadId);  
         Cursor c = dowanloadmanager.query(query);  
         if(c!=null&&c.moveToFirst()) {  
             int status = c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS));  
            
             int reasonIdx = c.getColumnIndex(DownloadManager.COLUMN_REASON); 
             int titleIdx = c.getColumnIndex(DownloadManager.COLUMN_TITLE); 
             int fileSizeIdx =  
               c.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES);     
             int bytesDLIdx =  
               c.getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR); 
             String title = c.getString(titleIdx); 
             int fileSize = c.getInt(fileSizeIdx); 
             int bytesDL = c.getInt(bytesDLIdx); 
            
             // Translate the pause reason to friendly text. 
             int reason = c.getInt(reasonIdx); 
             StringBuilder sb = new StringBuilder(); 
             sb.append(title).append("\n");
             sb.append("Downloaded ").append(bytesDL).append(" / " ).append(fileSize); 
            
             // Display the status  
             Log.d("tag", sb.toString()); 
             switch(status) {  
             case DownloadManager.STATUS_PAUSED:  
                 Log.v("tag", "STATUS_PAUSED"); 
             case DownloadManager.STATUS_PENDING:  
                 Log.v("tag", "STATUS_PENDING"); 
             case DownloadManager.STATUS_RUNNING:  
                 //正在下載，不做任何事情 
                 Log.v("tag", "STATUS_RUNNING"); 
       
        
                 break;  
             case DownloadManager.STATUS_SUCCESSFUL:  
                 //完成 
                 Log.v("tag", "下載完成"); 
//                 dowanloadmanager.remove(lastDownloadId);  
                 break;  
             case DownloadManager.STATUS_FAILED:  
                 //清除已下載的內容，重新下載 
                 Log.v("tag", "STATUS_FAILED"); 
                 dowanloadmanager.remove(lastDownloadId);  
                 break;  
             }  
         } 
     } 
    
     @Override
     protected void onDestroy() {
      // TODO Auto-generated method stub
      super.onDestroy();
        unregisterReceiver(receiver); 
        getContentResolver().unregisterContentObserver(downloadObserver);
     }
}

 

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