Android中的消息通知Toast和Notification

Android中的消息通知Toast和Notification

1.弹出通知Toast

MainActivity.java

package com.example.toast;

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

public class MainActivity extends Activity {
    private Button showToast,showLongToast,showImageToast;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        showToast=(Button) findViewById(R.id.showToast);
        showLongToast=(Button) findViewById(R.id.showLongToast);
        showImageToast=(Button)findViewById(R.id.showImageToast);
        showToast.setOnClickListener(new View.OnClickListener() {
            
            @Override
            public void onClick(View v) {
                // TODO 自动生成的方法存根
                Toast ashort=Toast.makeText(MainActivity.this, "显示一个简短的Toast", Toast.LENGTH_SHORT);
                ashort.setGravity(Gravity.CENTER, 100, -200);//设置偏移量
                ashort.show();
            }
        });
        showLongToast.setOnClickListener(new View.OnClickListener() {
            
            @Override
            public void onClick(View v) {
                // TODO 自动生成的方法存根
                Toast.makeText(MainActivity.this, "显示一个较长的Toast", Toast.LENGTH_LONG).show();
            }
        });
    

      showImageToast.setOnClickListener(new View.OnClickListener() {
        
        @Override
        public void onClick(View v) {
            // TODO 自动生成的方法存根
            Toast ImageToast=Toast.makeText(MainActivity.this, "显示一个带有图片的Toast", Toast.LENGTH_SHORT);
            ImageView imageView=new ImageView(MainActivity.this);
            imageView.setImageResource(R.drawable.ic_launcher);
            ImageToast.setView(imageView);
            ImageToast.show();
        }
    });
    }

    @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;
    }
    
}

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

package com.example.notification;

import android.os.Bundle;
import android.app.Activity;
import android.app.Notification;
import android.app.Notification.Builder;
import android.app.NotificationManager;
import android.content.Context;
import android.support.v4.app.NotificationCompat;
import android.view.Menu;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {
    private Button BNotification;
    public static final int NOFIFICATION_ID=2000;
    private int conter=1;
    

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        BNotification=(Button) findViewById(R.id.button1);
        BNotification.setOnClickListener(new View.OnClickListener() {
            
            @Override
            public void onClick(View v) {
                conter++;
                // TODO 自动生成的方法存根
        android.support.v4.app.NotificationCompat.Builder builder=new NotificationCompat.Builder(MainActivity.this);
        builder.setSmallIcon(R.drawable.ic_launcher);
        builder.setContentText("哇！你有"+conter+"个新校息！");
        builder.setContentTitle("Hello Notification!");
        Notification notification=builder.build();
        NotificationManager manager=(NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
        manager.notify(NOFIFICATION_ID, notification);
        
            }
        });
    }


    @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;
    }
    
}

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"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/_notification" />