package example.downloaddemo;import java.io.File;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.os.Message;import android.app.Activity;import android.app.DownloadManager;import android.app.DownloadManager.Query;import android.app.DownloadManager.Request;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.database.Cursor;import android.util.Log;import android.view.Menu;import android.view.View;import android.widget.Toast;/** * @author yunfei * */public class MainActivity extends Activity { private static final String TAG = "PDWY"; // an ID for the download, unique across the system. This ID is used to make // future calls related to this download. long mDownloadId; DownloadManager downloadManager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // 过SystemService 以获取 DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE); } @Override protected void onPause() { stopQuery(); this.unregisterReceiver(receiver); super.onPause(); } @Override protected void onResume() { IntentFilter filter = new IntentFilter( DownloadManager.ACTION_DOWNLOAD_COMPLETE); this.registerReceiver(receiver, filter); IntentFilter filter22 = new IntentFilter( DownloadManager.ACTION_NOTIFICATION_CLICKED); this.registerReceiver(receiver2, filter22); startQuery(mDownloadId); super.onResume(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_main, menu); return true; } public void lookDownload() { startActivity(new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS)); } public void onClick(View view) { int id = view.getId(); if (id == R.id.start) { Request request = new Request( request.setAllowedNetworkTypes( DownloadManager.Request.NETWORK_MOBILE | DownloadManager.Request.NETWORK_WIFI) .setAllowedOverRoaming(false) // 缺省是true .setTitle("更新") // 用于信息查看 .setDescription("下载apk") // 用于信息查看 .setDestinationInExternalPublicDir( Environment.DIRECTORY_DOWNLOADS, "2.zip"); mDownloadId = downloadManager.enqueue(request); // 加入下载队列 startQuery(mDownloadId); } if (id == R.id.stop) { stopQuery(); removeDownload(mDownloadId); } if (id == R.id.look) { lookDownload(); } } private int removeDownload(long downloadId) { return downloadManager.remove(downloadId); } Handler handler = new Handler() { @Override public void handleMessage(Message msg) { // TODO Auto-generated method stub super.handleMessage(msg); } }; int step = 1000; QueryRunnable runnable = new QueryRunnable(); class QueryRunnable implements Runnable { public long DownID; @Override public void run() { queryState(DownID); handler.postDelayed(runnable, step); } }; private void startQuery(long downloadId) { if (downloadId != 0) { runnable.DownID = downloadId; handler.postDelayed(runnable, step); } }; private void stopQuery() { handler.removeCallbacks(runnable); } private void queryState(long downID) { // 关键：通过ID向下载管理查询下载情况，返回一个cursor Cursor c = downloadManager.query(new DownloadManager.Query() .setFilterById(downID)); if (c == null) { Toast.makeText(this, "Download not found!", Toast.LENGTH_LONG) .show(); } else { // 以下是从游标中进行信息提取 if(!c.moveToFirst()){ c.close(); return; } Log.d(TAG, "Column_id : " + c.getLong(c .getColumnIndex(DownloadManager.COLUMN_ID))); Log.d(TAG, "Column_bytes_downloaded so far : " + c.getLong(c .getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR))); Log.d(TAG, "Column last modified timestamp : " + c.getLong(c .getColumnIndex(DownloadManager.COLUMN_LAST_MODIFIED_TIMESTAMP))); Log.d(TAG, "Column local uri : " + c.getString(c .getColumnIndex(DownloadManager.COLUMN_LOCAL_URI))); Log.d(TAG, "Column statue : " + c.getInt(c .getColumnIndex(DownloadManager.COLUMN_STATUS))); Log.d(TAG, "Column reason : " + c.getInt(c .getColumnIndex(DownloadManager.COLUMN_REASON))); int st = c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS)); Toast.makeText(this, statusMessage(st), Toast.LENGTH_LONG).show(); //Log.i(TAG, statusMessage(st)); c.close(); } } private String statusMessage(int st) { switch (st) { case DownloadManager.STATUS_FAILED: return "Download failed"; case DownloadManager.STATUS_PAUSED: return "Download paused"; case DownloadManager.STATUS_PENDING: return "Download pending"; case DownloadManager.STATUS_RUNNING: return "Download in progress!"; case DownloadManager.STATUS_SUCCESSFUL: return "Download finished"; default: return "Unknown Information"; } } // 监听下载结束，启用BroadcastReceiver BroadcastReceiver receiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE); String action = intent.getAction(); if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) { long downloadId = intent.getLongExtra( DownloadManager.EXTRA_DOWNLOAD_ID, 0); // 查询 Query query = new Query(); query.setFilterById(downloadId); Cursor c = dm.query(query); if (c.moveToFirst()) { int columnIndex = c .getColumnIndex(DownloadManager.COLUMN_STATUS); if (DownloadManager.STATUS_SUCCESSFUL == c .getInt(columnIndex)) { String uriString = c .getString(c .getColumnIndex(DownloadManager.COLUMN_LOCAL_URI)); //removeDownload(downloadId); Toast.makeText(MainActivity.this, "get file complete: " + uriString, 0).show(); // Uri.parse(uriString); } }// endif }// endif }// onReceive };// end class receiver // 监听下载结束，启用BroadcastReceiver BroadcastReceiver receiver2 = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { long downloadId = intent.getLongExtra( DownloadManager.EXTRA_DOWNLOAD_ID, 0); String action = intent.getAction(); if (DownloadManager.ACTION_NOTIFICATION_CLICKED.equals(action)) { lookDownload(); } } };//}联系客服
