android-帶進度條的系統通知欄消息

 效果圖:

主界面隻有一個按鈕就不上文件瞭
通知欄顯示所用到的佈局文件content_view.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="fill_parent" 
    android:background="#00000000" 
    android:orientation="vertical"  
    android:padding="5dp"> 
 
    <ImageView  
        android:id="@+id/content_view_image" 
        android:layout_width="25dp" 
        android:layout_height="25dp" 
        android:src="@drawable/logo" 
         
        /> 
    <TextView 
        android:id="@+id/content_view_text1" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:text="0%" 
        android:textColor="#000000" 
        android:layout_toRightOf="@id/content_view_image" 
        android:layout_centerHorizontal="true" 
        android:layout_marginTop="5dp" 
        android:layout_marginLeft="15dp" 
      /> 
    <ProgressBar  
        android:id="@+id/content_view_progress" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        style="@android:style/Widget.ProgressBar.Horizontal" 
        android:max="100" 
        android:layout_below="@id/content_view_image" 
        android:layout_marginTop="4dp" 
        /> 
     
</RelativeLayout> 

主運行類:

[java]
package yyy.testandroid4; 
 
import java.util.Timer; 
import java.util.TimerTask; 
 
import android.app.Activity; 
import android.app.AlertDialog.Builder; 
import android.app.Notification; 
import android.app.NotificationManager; 
import android.app.PendingIntent; 
import android.content.DialogInterface; 
import android.content.Intent; 
import android.content.pm.PackageManager.NameNotFoundException; 
import android.os.Bundle; 
import android.os.Handler; 
import android.os.Message; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.RemoteViews; 
import android.widget.Toast; 
 
public class TestAndroid4Activity extends Activity { 
     
     
    private Handler handler = new Handler(){ 
        @Override 
        public void handleMessage(Message msg) { 
            // TODO Auto-generated method stub 
            super.handleMessage(msg); 
            switch (msg.what) { 
            case 0: 
                notif.contentView.setTextViewText(R.id.content_view_text1, len+"%"); 
                notif.contentView.setProgressBar(R.id.content_view_progress, 100, len, false); 
                manager.notify(0, notif); 
                 
                break; 
            case 1: 
                Toast.makeText(TestAndroid4Activity.this, "下載完成", 0).show(); 
                break; 
            default: 
                break; 
            } 
        } 
         
    }; 
     
    private Button update,cancel; 
    private int localVersion,serverVersion; 
    private int len; 
    private NotificationManager manager; 
    private Notification notif; 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
         
        update = (Button) findViewById(R.id.update); 
       
        update.setOnClickListener(new OnClickListener() { 
            @Override 
            public void onClick(View arg0) { 
                // TODO Auto-generated method stub 
                //點擊通知欄後打開的activity 
                Intent intent = new Intent(TestAndroid4Activity.this,OtherActivity.class); 
                 
                PendingIntent pIntent = PendingIntent.getActivity(TestAndroid4Activity.this, 0, intent, 0); 
                     manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE); 
                notif = new Notification(); 
                notif.icon = R.drawable.logo; 
                notif.tickerText = "新通知"; 
                //通知欄顯示所用到的佈局文件 
                notif.contentView = new RemoteViews(getPackageName(), R.layout.content_view); 
                notif.contentIntent = pIntent; 
                manager.notify(0, notif); 
                new DownLoadThread().start(); 
            } 
        }); 
         
        
         
    } 
  } 
     
    private class DownLoadThread extends Thread{ 
        private Timer timer = new Timer(); 
        @Override 
        public void run() { 
            // TODO Auto-generated method stub 
            super.run(); 
            timer.schedule(new TimerTask() { 
                @Override 
                public void run() { 
                    // TODO Auto-generated method stub 
                     
                    Message msg = new Message(); 
                    msg.what = 0; 
                    msg.obj = len; 
                    handler.sendMessage(msg); 
                     
                    if(len == 100){ 
                        timer.cancel(); 
                        handler.sendEmptyMessage(1); 
                    } 
                 
                } 
            }, 0, 1000); 
            len = 0; 
            try { 
                while(len < 100){ 
                    len++; 
                    Thread.sleep(1000); 
                } 
            } catch (InterruptedException e) { 
                // TODO Auto-generated catch block 
                e.printStackTrace(); 
            } 
        } 
         
    } 
     
     

 

摘自 Central-Perk的專欄

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