Notification简介
Notification是Android中用于提示用户消息的小工具，它显示在屏幕的顶端。
随着Android API版本的升级，Notification的创建方式也在改变。
Android 3.0以前，一般使用NotificationCompate.Builder构建Notification。
Android 3.0以后，一般推荐使用Notification.Builder来构建Notification。
Notification的几个必须要设置的属性：
-小图标，对应setSamllIcon
-标题，对应setContentTitle
-内容，对应setContentText
Demo1：普通的Notification
public class MainActivity extends AppCompatActivity {
private static final int REQUEST_CODE_NORMAL = 1;
private static final int NORMAL_ID = 2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void onClick(View view) {
NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
//为builder设置相关属性
builder.setContentTitle("Weather");
builder.setContentText("it's sunny today");
builder.setSmallIcon(R.mipmap.weather);
//设置展示内容的大图片
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.weather);
builder.setLargeIcon(bitmap);
//设置通知点击后跳转到详情界面
PendingIntent pendingIntent = PendingIntent.getActivity(this, REQUEST_CODE_NORMAL,
new Intent(this, WeatherActivity.class), PendingIntent.FLAG_ONE_SHOT);
builder.setContentIntent(pendingIntent);
builder.setAutoCancel(true);
//通过NotificationManager.notify将通知发送
NotificationManager manager= (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification=builder.build();
manager.notify(NORMAL_ID,notification);
}
}
Demo2：带进度条的Notification
public class MainActivity extends AppCompatActivity {
private static final int REQUEST_CODE_NORMAL = 1;
private static final int PROGRESS_ID =2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void onClick(View view) {
final NotificationCompat.Builder builder=new NotificationCompat.Builder(this);
builder.setContentTitle("提示");
builder.setContentText("正在下载一部小电影");
builder.setSmallIcon(R.mipmap.download);
final NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
new Thread(new Runnable() {
@Override
public void run() {
for (int i = 0; i <=100 ; i+=10) {
builder.setProgress(100,i,false);
manager.notify(PROGRESS_ID,builder.build());
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
builder.setContentText("下载完成");
manager.notify(PROGRESS_ID,builder.build());
}
}).start();
}
}
Demo3：自定义的Notification
public class MainActivity extends AppCompatActivity {
private static final int REQUEST_CODE_NORMAL = 1;
private static final int CUSTOM_ID =2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void onClick(View view) {
NotificationCompat.Builder builder=new NotificationCompat.Builder(this);
builder.setSmallIcon(R.mipmap.ic_launcher);
RemoteViews remoteViews=new RemoteViews(getPackageName(),R.layout.remote_layout);
/**
* @param ResId：控件的id
* @param ResId：图片资源的Id
*/
remoteViews.setImageViewResource(R.id.img_show,R.mipmap.weather);
remoteViews.setTextViewText(R.id.txt_show,"it's cloudy today");
builder.setContent(remoteViews);
NotificationManager manager= (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
manager.notify(CUSTOM_ID,builder.build());
}
}
