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Android中的消息通知Toast和Notification

1. 弹出通知Toast

MainActivity.java

 1 package com.example.toast;  2   3 import android.os.Bundle;  4 import android.app.Activity;  5 import android.view.Gravity;  6 import android.view.Menu;  7 import android.view.View;  8 import android.widget.Button;  9 import android.widget.ImageView; 10 import android.widget.Toast; 11  12 public class MainActivity extends Activity { 13     private Button showToast,showLongToast,showImageToast; 14     @Override 15     protected void onCreate(Bundle savedInstanceState) { 16         super.onCreate(savedInstanceState); 17         setContentView(R.layout.activity_main); 18          19         showToast=(Button) findViewById(R.id.showToast); 20         showLongToast=(Button) findViewById(R.id.showLongToast); 21         showImageToast=(Button)findViewById(R.id.showImageToast); 22         showToast.setOnClickListener(new View.OnClickListener() { 23              24             @Override 25             public void onClick(View v) { 26                 // TODO 自动生成的方法存根 27                 Toast ashort=Toast.makeText(MainActivity.this, "显示一个简短的Toast", Toast.LENGTH_SHORT); 28                 ashort.setGravity(Gravity.CENTER, 100, -200);//设置偏移量 29                 ashort.show(); 30             } 31         }); 32         showLongToast.setOnClickListener(new View.OnClickListener() { 33              34             @Override 35             public void onClick(View v) { 36                 // TODO 自动生成的方法存根 37                 Toast.makeText(MainActivity.this, "显示一个较长的Toast", Toast.LENGTH_LONG).show(); 38             } 39         }); 40      41  42       showImageToast.setOnClickListener(new View.OnClickListener() { 43          44         @Override 45         public void onClick(View v) { 46             // TODO 自动生成的方法存根 47             Toast ImageToast=Toast.makeText(MainActivity.this, "显示一个带有图片的Toast", Toast.LENGTH_SHORT); 48             ImageView imageView=new ImageView(MainActivity.this); 49             imageView.setImageResource(R.drawable.ic_launcher); 50             ImageToast.setView(imageView); 51             ImageToast.show(); 52         } 53     }); 54     } 55  56     @Override 57     public boolean onCreateOptionsMenu(Menu menu) { 58         // Inflate the menu; this adds items to the action bar if it is present. 59         getMenuInflater().inflate(R.menu.main, menu); 60         return true; 61     } 62      63 }

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"  android:layout_width="match_parent"  android:layout_height="match_parent"  tools:context=".MainActivity"  android:orientation="vertical">  <Button   android:id="@+id/showToast"   android:layout_width="match_parent"   android:layout_height="wrap_content"   android:text="@string/_toast" />  <Button   android:id="@+id/showLongToast"   android:layout_width="match_parent"   android:layout_height="wrap_content"   android:text="显示一个较长的Toast" />  <Button   android:id="@+id/showImageToast"   android:layout_width="match_parent"   android:layout_height="wrap_content"   android:text="showImageToast" /> </LinearLayout>

2. 状态栏提示Notification

MainActivity.java

 1 package com.example.notification;  2   3 import android.os.Bundle;  4 import android.app.Activity;  5 import android.app.Notification;  6 import android.app.Notification.Builder;  7 import android.app.NotificationManager;  8 import android.content.Context;  9 import android.support.v4.app.NotificationCompat; 10 import android.view.Menu; 11 import android.view.View; 12 import android.widget.Button; 13  14 public class MainActivity extends Activity { 15     private Button BNotification; 16     public static final int NOFIFICATION_ID=2000; 17     private int conter=1; 18      19  20     @Override 21     protected void onCreate(Bundle savedInstanceState) { 22         super.onCreate(savedInstanceState); 23         setContentView(R.layout.activity_main); 24         BNotification=(Button) findViewById(R.id.button1); 25         BNotification.setOnClickListener(new View.OnClickListener() { 26              27             @Override 28             public void onClick(View v) { 29                 conter++; 30                 // TODO 自动生成的方法存根 31         android.support.v4.app.NotificationCompat.Builder builder=new NotificationCompat.Builder(MainActivity.this); 32         builder.setSmallIcon(R.drawable.ic_launcher); 33         builder.setContentText("哇！你有"+conter+"个新校息！"); 34         builder.setContentTitle("Hello Notification!"); 35         Notification notification=builder.build(); 36         NotificationManager manager=(NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE); 37         manager.notify(NOFIFICATION_ID, notification); 38          39             } 40         }); 41     } 42  43  44     @Override 45     public boolean onCreateOptionsMenu(Menu menu) { 46         // Inflate the menu; this adds items to the action bar if it is present. 47         getMenuInflater().inflate(R.menu.main, menu); 48         return true; 49     } 50      51 }

activity_main.xml

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  2     xmlns:tools="http://schemas.android.com/tools"  3     android:layout_width="match_parent"  4     android:layout_height="match_parent"  5     android:orientation="vertical"  6     tools:context=".MainActivity" >  7   8     <Button  9         android:id="@+id/button1" 10         android:layout_width="match_parent" 11         android:layout_height="wrap_content" 12         android:text="@string/_notification" />