A method for implementing static broadcast listeners on Android _android

The example in this article describes the way Android implements static broadcast listeners. Share to everyone for your reference. The implementation method is as follows:

Package lab.sodino.broadcastaction;
Import Lab.sodino.util.DatabaseOpenHelper;
Import Lab.sodino.util.SodinoOut;
Import android.app.Activity;
Import Android.content.ContentResolver;
Import Android.database.ContentObserver;
Import Android.database.Cursor;
Import Android.os.Bundle;
Import Android.os.Handler;
Import Android.os.Message;
Import Android.view.View;
Import Android.view.ViewGroup.LayoutParams;
Import Android.widget.Button;
Import Android.widget.LinearLayout;
Import Android.widget.ScrollView;
Import Android.widget.TextView; /** * This example will record how often a static registered broadcast can be heard. <br/> * 1. Create a Table {Action_name broadcast name, last_time the last occurrence, the number of times that count was recorded}<br/> * 2. Monitor broadcasts in Actionreceiver and record. <br/> * 3. Update database records in Dbcontentprovider <br/> * 4. Monitor the changes in the database in the Broadcastactionrecordact.actiondbobserver, * and use the handler mechanism to display the latest situation on the txtinfo.
 <br/> * 5.DatabaseOpenHelper will implement basic database operations. * * @author Sodino */public class Broadcastactionrecordact extends activity implements Button.onclicklistener {PRI Vate TextView Txtinfo;
 Private Databaseopenhelper DBHelper;
 Private Button Btnrefresh; The/** clear feature is not complete.
 * * Private Button btnclear;
   Private Handler Handler = new Handler () {public void Handlemessage (msg) {string info = (String) msg.obj;
  Txtinfo.settext (info);
 }
 };
  @Override public void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);
  Layoutparams LPPC = new Layoutparams (layoutparams.fill_parent, layoutparams.wrap_content);
  Layoutparams LPCC = new Layoutparams (layoutparams.wrap_content, layoutparams.wrap_content);
  Btnrefresh = new Button (this);
  Btnrefresh.setlayoutparams (LPCC);
  Btnrefresh.settext ("Refresh");
  Btnrefresh.setonclicklistener (this);
  Btnclear = new Button (this);
  Btnclear.setlayoutparams (LPCC);
  Btnclear.settext ("cleartable");
  Btnclear.setonclicklistener (this);
  LinearLayout sublayout = new LinearLayout (this);
  Sublayout.setlayoutparams (LPPC);
  Sublayout.setorientation (linearlayout.horizontal); SUblayout.addview (Btnrefresh);
  Sublayout.addview (btnclear);
  Txtinfo = new TextView (this);
  Txtinfo.setlayoutparams (LPPC);
  Txtinfo.settextcolor (0XFF0000FF);
  Txtinfo.setbackgroundcolor (0xFFFFFFFF);
  Txtinfo.settext ("Starting ...");
  Txtinfo.settextsize (15);
  ScrollView ScrollView = new ScrollView (this);
  Scrollview.setlayoutparams (LPPC);
  Scrollview.addview (Txtinfo);
  LinearLayout mainlayout = new LinearLayout (this);
  Mainlayout.setlayoutparams (LPPC);
  Mainlayout.setorientation (linearlayout.vertical);
  Mainlayout.addview (sublayout);
  Mainlayout.addview (ScrollView);
  Setcontentview (mainlayout);
  DBHelper = new Databaseopenhelper (this);
  Contentresolver contentresolver = Getcontentresolver ();
 Contentresolver.registercontentobserver (Dbcontentprovider.content_uri, False, new Actiondbobserver (handler));
  public void OnClick (view view) {if (view = = Btnrefresh) {Refreshrecord ();
  else if (view = = Btnclear) {Clearrecord (); }} public void RefreshrecOrd () {dbhelper.openreadabledatabase ();
  String info = dbhelper.getallorderedlist (DATABASEOPENHELPER.DESC);
  Dbhelper.close ();
  if (info!= null) {Txtinfo.settext (info);
  else {txtinfo.settext ("<NULL/>");
 } dbhelper.close ();
  public void Clearrecord () {dbhelper.openwritabledatabase ();
  Dbhelper.clearrecord ();
 Dbhelper.close ();
  Private class Actiondbobserver extends Contentobserver {private Handler Handler;
   Public Actiondbobserver (Handler Handler) {super (Handler);
  This.handler = handler;
   } public void OnChange (Boolean selfchange) {Super.onchange (selfchange);
   string[] projection = {"Action_name", "Last_time", "COUNT"};
   String selection = "SELECT * from ActionTable";
   String SortOrder = "COUNT DESC";
   Dbhelper.openreadabledatabase ();
   Cursor Cursor = dbhelper.query (projection, NULL, NULL,//SortOrder); Cursor Cursor = managedquery (Dbcontentprovider.content_uri, projection, NULL, NULL, SortOrder);
   String info = "";
   String line = "";
   int actionidx = 0;
   int timeidx = 1;
   int countidx = 2;
    while (Cursor.movetonext ()) {line + = cursor.getstring (ACTIONIDX) + "";
    Line + + cursor.getstring (TIMEIDX) + "";
    Line + + cursor.getstring (countidx) + "n";
    info + = line;
   line = "";
   msg = new Message ();
   Msg.obj = info;
   Handler.sendmessage (msg);
   Cursor.close ();
   Dbhelper.close ();
  Sodinoout.out ("Database does changed!!!");
  public Boolean deliverselfnotifications () {return super.deliverselfnotifications ();

 }
 }
}

I hope this article will help you with your Android program.