notification

  1 package com.qianfeng.gp08_day22_notification;
  2 
  3 import android.os.Bundle;
  4 import android.support.v4.app.NotificationCompat;
  5 import android.view.Gravity;
  6 import android.view.View;
  7 import android.view.View.OnClickListener;
  8 import android.widget.Toast;
  9 import android.app.Activity;
 10 import android.app.Notification;
 11 import android.app.NotificationManager;
 12 import android.app.PendingIntent;
 13 import android.content.Context;
 14 import android.content.Intent;
 15 
 16 
 17 /**
 18  * 使用的v4包中的NotificationCompat
 19  * @author qq
 20  *
 21  */
 22 public class MainActivity extends Activity{
 23 
 24     @Override
 25     protected void onCreate(Bundle savedInstanceState) {
 26         super.onCreate(savedInstanceState);
 27         setContentView(R.layout.activity_main);
 28     }
 29 
 30     public void btnClick(View v)
 31     {
 32         //创建通知 的构建器对象
 33         NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
 34         
 35         //设置通知的相关属性
 36         builder.setContentTitle("通知");
 37         
 38         builder.setContentText("下雨了");
 39         
 40         //必须设置，否则程序会崩溃
 41         builder.setSmallIcon(R.drawable.ic_launcher);
 42         
 43         //得到通知管理对象---属于系统服务
 44         NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
 45         
 46         //得到通知对象
 47         Notification notification = builder.build();
 48         
 49         //使用通知管理对象发送通知
 50         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
 51         
 52     }
 53     
 54     public void btnClick2(View v)
 55     {
 56         NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
 57         
 58         builder.setContentTitle("你有短信");
 59         builder.setContentText("你有3条短信");
 60         builder.setSmallIcon(R.drawable.ic_launcher);
 61         builder.setNumber(3);//设置数量
 62         //收到通知可以 是声音，灯光，震动
 63         //DEFAULT_VIBRATE  需要权限
 64         builder.setDefaults(Notification.DEFAULT_VIBRATE);
 65         
 66         Notification notification = builder.build();
 67         
 68         NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
 69         
 70         manager.notify(168, notification);
 71         
 72     }
 73     
 74     public void btnClick3(View v)
 75     {
 76         NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
 77         
 78         builder.setContentTitle("下载图片");
 79         builder.setContentText("正在下载");
 80         builder.setSmallIcon(R.drawable.ic_launcher);
 81         builder.setOngoing(true);//设置不可以被删除
 82         
 83         
 84         Notification n = builder.build();
 85         
 86         NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
 87         
 88         manager.notify(188, n);
 89     }
 90     
 91     public void btnClick4(View v)
 92     {
 93         NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
 94         
 95         builder.setContentTitle("你有短信")
 96                .setContentText("你有6条短信")
 97                .setSmallIcon(R.drawable.ic_launcher)
 98                .setNumber(6)
 99                .setDefaults(Notification.DEFAULT_ALL);
100         
101         Intent intent = new Intent(this,MainActivity.class);
102         
103         //可以当通知被点击时自动执行 startActiivty()
104         PendingIntent pending = PendingIntent.getActivity(this, 6, intent, PendingIntent.FLAG_CANCEL_CURRENT);
105                                                                               //跳转后通知会消失
106         builder.setContentIntent(pending);
107         
108         builder.setAutoCancel(true);//设置通知自动消失
109         
110         Notification ntf = builder.build();
111         
112         NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
113         
114         manager.notify(88, ntf);
115     }
116     
117     public void btnClick5(View v)
118     {
119         Toast toast = new Toast(this);
120         
121         View view = getLayoutInflater().inflate(R.layout.toast_layout, null);
122         
123         toast.setView(view);//设置吐司使用的布局
124         
125         toast.setGravity(Gravity.CENTER, 0,0);//设置吐司的显示位置
126         
127         toast.setDuration(Toast.LENGTH_SHORT);
128         
129         toast.show();
130     }
131 
132 
133     
134     
135 
136 }

 1 package com.example.asynctasknotification;
 2 
 3 import android.os.Bundle;
 4 import android.app.Activity;
 5 import android.view.Menu;
 6 import android.view.View;
 7 import android.view.View.OnClickListener;
 8 import android.widget.Button;
 9 import android.widget.ImageView;
10 
11 public class MainActivity extends Activity {
12 
13     private ImageView imageView;
14     private Button btn;
15     private String path="http://images2015.cnblogs.com/blog/493196/201509/493196-20150901203057606-579869820.jpg";
16     @Override
17     protected void onCreate(Bundle savedInstanceState) {
18         super.onCreate(savedInstanceState);
19         setContentView(R.layout.activity_main);
20         
21         imageView=(ImageView) findViewById(R.id.iv);
22         btn=(Button) findViewById(R.id.btn);
23         
24         btn.setOnClickListener(new OnClickListener() {
25             
26             @Override
27             public void onClick(View v) {
28                 new MyAsyncTask(MainActivity.this,imageView).execute(path);
29                 
30             }
31         });
32         
33         
34         
35         
36     }
37 
38     @Override
39     public boolean onCreateOptionsMenu(Menu menu) {
40         // Inflate the menu; this adds items to the action bar if it is present.
41         getMenuInflater().inflate(R.menu.main, menu);
42         return true;
43     }
44 
45 }

  1 package com.example.asynctasknotification;
  2 
  3 import java.io.ByteArrayOutputStream;
  4 import java.io.IOException;
  5 import java.io.InputStream;
  6 import java.net.HttpURLConnection;
  7 import java.net.MalformedURLException;
  8 import java.net.URL;
  9 
 10 import android.app.Notification;
 11 import android.app.NotificationManager;
 12 import android.content.Context;
 13 import android.graphics.Bitmap;
 14 import android.graphics.BitmapFactory;
 15 import android.os.AsyncTask;
 16 import android.support.v4.app.NotificationCompat;
 17 import android.widget.ImageView;
 18 
 19 public class MyAsyncTask extends AsyncTask<String, Integer, Bitmap> {
 20 
 21     private NotificationCompat.Builder builder;
 22     private NotificationManager manager;
 23     private ImageView imageView;
 24     private Context context;
 25 
 26     public MyAsyncTask(Context context, ImageView imageView) {
 27         this.imageView = imageView;
 28         this.context = context;
 29         manager = (NotificationManager) context
 30                 .getSystemService(Context.NOTIFICATION_SERVICE);
 31         builder = new NotificationCompat.Builder(context);
 32         builder.setContentTitle("下载图片");
 33         builder.setContentText("正在下载");
 34         builder.setSmallIcon(R.drawable.ic_launcher);
 35     }
 36 
 37     @Override
 38     protected Bitmap doInBackground(String... params) {
 39     
 40         Bitmap bitmap = null;
 41         URL url;
 42         try {
 43             url = new URL(params[0]);
 44             HttpURLConnection conn = (HttpURLConnection) url.openConnection();
 45             conn.setRequestMethod("GET");
 46             conn.setConnectTimeout(5000);
 47             conn.setDoInput(true);
 48 
 49             InputStream in = null;
 50             if (conn.getResponseCode() == 200) {
 51                 in = conn.getInputStream();
 52                 ByteArrayOutputStream baos = new ByteArrayOutputStream();
 53                 int total = conn.getContentLength();
 54                 int len = 0;
 55                 int count = 0;
 56                 byte[] by = new byte[1024];
 57                 while ((len = in.read(by)) != -1) {
 58                     baos.write(by, 0, len);
 59                     count += len;
 60                     publishProgress((int) (100 * count / total));
 61                 }
 62                 byte[] b = baos.toByteArray();
 63                 bitmap = BitmapFactory.decodeByteArray(b, 0, b.length);
 64             }
 65         } catch (MalformedURLException e) {
 66             e.printStackTrace();
 67         } catch (IOException e) {
 68             e.printStackTrace();
 69         }
 70         return bitmap;
 71     }
 72 
 73     @Override
 74     protected void onCancelled() {
 75         // TODO Auto-generated method stub
 76         super.onCancelled();
 77     }
 78 
 79     @Override
 80     protected void onPreExecute() {
 81         super.onPreExecute();
 82 
 83         builder.setOngoing(true);// 设置不可以被删除
 84         builder.setProgress(100, 0, false);
 85 
 86         manager.notify(188, builder.build());
 87 
 88     }
 89 
 90     @Override
 91     protected void onPostExecute(Bitmap result) {
 92 
 93         builder.setOngoing(false);// 设置可以被删除
 94         builder.setContentText("下载完毕");
 95         builder.setProgress(0, 0, false);
 96         manager.notify(188, builder.build());
 97 
 98         imageView.setImageBitmap(result);
 99 
100     }
101 
102     @Override
103     protected void onProgressUpdate(Integer... values) {
104         builder.setProgress(100, values[0], false);
105         builder.setContentText("已下载"+values[0]+"%");
106         manager.notify(188, builder.build());
107     }
108 
109 }