notification

一般的notification

package com.qianfeng.gp08_day22_notification;

import android.os.Bundle;
import android.support.v4.app.NotificationCompat;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Toast;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;


/**
 * 使用的v4包中的NotificationCompat
 * @author qq
 *
 */
public class MainActivity extends Activity{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void btnClick(View v)
    {
        //创建通知 的构建器对象
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
        
        //设置通知的相关属性
        builder.setContentTitle("通知");
        
        builder.setContentText("下雨了");
        
        //必须设置，否则程序会崩溃
        builder.setSmallIcon(R.drawable.ic_launcher);
        
        //得到通知管理对象---属于系统服务
        NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        
        //得到通知对象
        Notification notification = builder.build();
        
        //使用通知管理对象发送通知
        manager.notify((int)System.currentTimeMillis(), notification);//如果id相同，即使发送多个通知，也只显示一个
        
    }
    
    public void btnClick2(View v)
    {
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
        
        builder.setContentTitle("你有短信");
        builder.setContentText("你有3条短信");
        builder.setSmallIcon(R.drawable.ic_launcher);
        builder.setNumber(3);//设置数量
        //收到通知可以 是声音，灯光，震动
        //DEFAULT_VIBRATE  需要权限
        builder.setDefaults(Notification.DEFAULT_VIBRATE);
        
        Notification notification = builder.build();
        
        NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        
        manager.notify(168, notification);
        
    }
    
    public void btnClick3(View v)
    {
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
        
        builder.setContentTitle("下载图片");
        builder.setContentText("正在下载");
        builder.setSmallIcon(R.drawable.ic_launcher);
        builder.setOngoing(true);//设置不可以被删除
        
        
        Notification n = builder.build();
        
        NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        
        manager.notify(188, n);
    }
    
    public void btnClick4(View v)
    {
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
        
        builder.setContentTitle("你有短信")
               .setContentText("你有6条短信")
               .setSmallIcon(R.drawable.ic_launcher)
               .setNumber(6)
               .setDefaults(Notification.DEFAULT_ALL);
        
        Intent intent = new Intent(this,MainActivity.class);
        
        //可以当通知被点击时自动执行 startActiivty()
        PendingIntent pending = PendingIntent.getActivity(this, 6, intent, PendingIntent.FLAG_CANCEL_CURRENT);
                                                                              //跳转后通知会消失
        builder.setContentIntent(pending);
        
        builder.setAutoCancel(true);//设置通知自动消失
        
        Notification ntf = builder.build();
        
        NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        
        manager.notify(88, ntf);
    }
    
    public void btnClick5(View v)
    {
        Toast toast = new Toast(this);
        
        View view = getLayoutInflater().inflate(R.layout.toast_layout, null);
        
        toast.setView(view);//设置吐司使用的布局
        
        toast.setGravity(Gravity.CENTER, 0,0);//设置吐司的显示位置
        
        toast.setDuration(Toast.LENGTH_SHORT);
        
        toast.show();
    }


    
    

}

带进度条的异步下载notification

package com.example.asynctasknotification;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

public class MainActivity extends Activity {

    private ImageView imageView;
    private Button btn;
    private String path="http://images2015.cnblogs.com/blog/493196/201509/493196-20150901203057606-579869820.jpg";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        imageView=(ImageView) findViewById(R.id.iv);
        btn=(Button) findViewById(R.id.btn);
        
        btn.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                new MyAsyncTask(MainActivity.this,imageView).execute(path);
                
            }
        });
        
        
        
        
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

package com.example.asynctasknotification;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import android.app.Notification;
import android.app.NotificationManager;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.support.v4.app.NotificationCompat;
import android.widget.ImageView;

public class MyAsyncTask extends AsyncTask<String, Integer, Bitmap> {

    private NotificationCompat.Builder builder;
    private NotificationManager manager;
    private ImageView imageView;
    private Context context;

    public MyAsyncTask(Context context, ImageView imageView) {
        this.imageView = imageView;
        this.context = context;
        manager = (NotificationManager) context
                .getSystemService(Context.NOTIFICATION_SERVICE);
        builder = new NotificationCompat.Builder(context);
        builder.setContentTitle("下载图片");
        builder.setContentText("正在下载");
        builder.setSmallIcon(R.drawable.ic_launcher);
    }

    @Override
    protected Bitmap doInBackground(String... params) {
    
        Bitmap bitmap = null;
        URL url;
        try {
            url = new URL(params[0]);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            conn.setConnectTimeout(5000);
            conn.setDoInput(true);

            InputStream in = null;
            if (conn.getResponseCode() == 200) {
                in = conn.getInputStream();
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                int total = conn.getContentLength();
                int len = 0;
                int count = 0;
                byte[] by = new byte[1024];
                while ((len = in.read(by)) != -1) {
                    baos.write(by, 0, len);
                    count += len;
                    publishProgress((int) (100 * count / total));
                }
                byte[] b = baos.toByteArray();
                bitmap = BitmapFactory.decodeByteArray(b, 0, b.length);
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return bitmap;
    }

    @Override
    protected void onCancelled() {
        // TODO Auto-generated method stub
        super.onCancelled();
    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();

        builder.setOngoing(true);// 设置不可以被删除
        builder.setProgress(100, 0, false);

        manager.notify(188, builder.build());

    }

    @Override
    protected void onPostExecute(Bitmap result) {

        builder.setOngoing(false);// 设置可以被删除
        builder.setContentText("下载完毕");
        builder.setProgress(0, 0, false);
        manager.notify(188, builder.build());

        imageView.setImageBitmap(result);

    }

    @Override
    protected void onProgressUpdate(Integer... values) {
        builder.setProgress(100, values[0], false);
        builder.setContentText("已下载"+values[0]+"%");
        manager.notify(188, builder.build());
    }

}