Android-Notification 简单介绍

public class MainActivity extends AppCompatActivity {

private NotificationManager mNotificationManager;

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

Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mNotificationManager = (NotificationManager)getSystemService(MainActivity.NOTIFICATION_SERVICE);

String tickerText1 = "this is notification";

int icon1 = android.R.drawable.btn_plus;

Intent notificationIntent1 = new Intent(MainActivity.this, MainActivity.class);
notificationIntent1.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent contentIntent1 = PendingIntent.getActivity(MainActivity.this, 0, notificationIntent1, 0);

Notification notification1 = new Notification(icon1, tickerText1, System.currentTimeMillis());

notification1.defaults |= Notification.DEFAULT_SOUND;

notification1.defaults |= Notification.DEFAULT_VIBRATE;
notification1.flags|=Notification.FLAG_ONGOING_EVENT;

RemoteViews contentView = new RemoteViews(getPackageName(), R.layout.remoteview_layout);
contentView.setTextViewText(R.id.notificationTitle, "Downloading...");
contentView.setTextViewText(R.id.notificationPercent, "35%");
contentView.setProgressBar(R.id.notificationProgress, 100, 35, false);

notification1.contentView = contentView;
notification1.contentIntent=contentIntent1;

mNotificationManager.notify(0, notification1);
}
});
}
}

activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.cootek.rvtest.MainActivity">

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
android:id="@+id/textView" />

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="发送notification"
android:id="@+id/button"
android:layout_below="@+id/textView"
android:layout_alignParentEnd="true"
android:layout_marginEnd="218dp" />
</RelativeLayout>
remoteview_layout.xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="3dp"
>
<ImageView android:id="@+id/notificationImage"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:src="@drawable/icon_dialer"
/>
<TextView android:id="@+id/notificationTitle"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:layout_toRightOf="@id/notificationImage"
android:layout_alignParentRight="true"
android:paddingLeft="6dp"
android:textColor="#FF000000"
/>
<TextView android:id="@+id/notificationPercent"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:layout_below="@id/notificationImage"
android:paddingTop="2dp"
android:textColor="#FF000000"
/>
</RelativeLayout>