Android实现为Notification加上一个进度条的方法

本文实例讲述了Android实现为Notification加上一个进度条的方法。分享给大家供大家参考，具体如下：

package com.notification;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
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 nofificationActivity extends Activity implements OnClickListener {
  private static final int NOTIFICATION_ID = 0x12;
  private Notification notification = null;
  private NotificationManager manager = null;
  public Handler handler;
  private int _progress = 0;
  private Thread thread = null;
  private boolean isStop = false;
  // 当界面处理停止的状态 时，设置让进度条取消
  @Override
  protected void onPause() {
    // TODO Auto-generated method stub
    isStop = false;
    manager.cancel(NOTIFICATION_ID);
    super.onPause();
  }
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Button btn = (Button) findViewById(R.id.Button01);
    btn.setOnClickListener(this);
    notification = new Notification(R.drawable.icon, "带进条的提醒", System
        .currentTimeMillis());
    notification.icon = R.drawable.icon;
    // 通过RemoteViews 设置notification中View 的属性
    notification.contentView = new RemoteViews(getApplication()
        .getPackageName(), R.layout.custom_dialog);
    notification.contentView.setProgressBar(R.id.pb, 100, 0, false);
    notification.contentView.setTextViewText(R.id.tv, "进度" + _progress
        + "%");
    // 通过PendingIntetn
    // 设置要跳往的Activity，这里也可以设置发送一个服务或者广播，
    // 不过在这里的操作都必须是用户点击notification之后才触发的
    notification.contentIntent = PendingIntent.getActivity(this, 0,
        new Intent(this, remoteView.class), 0);
    // 获得一个NotificationManger 对象，此对象可以对notification做统一管理，只需要知道ID
    manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
  }
  @Override
  public void onClick(View v) {
    // TODO Auto-generated method stub
    isStop = true;
    manager.notify(NOTIFICATION_ID, notification);
    thread = new Thread(new Runnable() {
      @Override
      public void run() {
        Thread.currentThread();
        // TODO Auto-generated method stub
        while (isStop) {
          _progress += 10;
          Message msg = handler.obtainMessage();
          msg.arg1 = _progress;
          msg.sendToTarget();
          try {
            Thread.sleep(500);
          } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
          }
        }
      }
    });
    thread.start();
    handler = new Handler() {
      @Override
      public void handleMessage(Message msg) {
        // TODO Auto-generated method stub
        notification.contentView.setProgressBar(R.id.pb, 100, msg.arg1,
            false);
        notification.contentView.setTextViewText(R.id.tv, "进度"
            + msg.arg1 + "%");
        manager.notify(NOTIFICATION_ID, notification);
        if (msg.arg1 == 100) {
          _progress = 0;
          manager.cancel(NOTIFICATION_ID);
          isStop = false;
          Toast.makeText(nofificationActivity.this, "下载完毕", 1000)
              .show();
        }
        super.handleMessage(msg);
      }
    };
  }
}

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希望本文所述对大家Android程序设计有所帮助。

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