android Notification的自定义和实现通知栏的展开和收起

最近写项目遇到了这样一个问题，就是如何才能实现通知栏的伸展，效果直接上图

通知栏伸展后是

其实实现这个效果还是比较简单的，但是查找了很多资料，大家都是说的马马虎虎，一样的模板，照抄照搬。

先来说一下如何实现Notification的自定义吧，这里需要设置的是Notification的ContentView，代码如下

remoteViews = new RemoteViews(getPackageName(),
        R.layout.statusbar);

builder = new NotificationCompat.Builder(getApplicationContext());

        builder.setSmallIcon(R.drawable.ic_launcher)
                .setOngoing(true)
                .setTicker("music is playing");
notification=builder.build();

notification.contentView=remoteViews;

mNotificationManager.notify(1,notification);

这样就实现了自定义notification布局了。

现在讲一下如何设置notification伸展的布局，想上面一下

也很简单，只需要把RemoteView交付给bigContentView就可以了。

remoteViews_large=new RemoteViews(getPackageName(),R.layout.statusbar_1);

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
    notification.bigContentView=remoteViews_large;
}

因为Notification的bigContentView只有在SDK16以上才可以使用，所以这里应该做一个判断。

还有一点找那个要的是，在设置bigContentView和ContentView时，一定要先设置前再设置后者，不然会导致notification布局不显示。

现在上一下全部代码：

MainActivity：

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Button btn_start,btn_cancel;
    private NotificationCompat.Builder builder;
    private NotificationManager mNotificationManager;
    private RemoteViews remoteViews,remoteViews_large;
    private Notification notification;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
    }

    private void initView() {
        btn_start= (Button) findViewById(R.id.btn_start);
        btn_cancel= (Button) findViewById(R.id.btn_cancel);
        btn_start.setOnClickListener(this);
        btn_cancel.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.btn_start:
                mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
                remoteViews = new RemoteViews(getPackageName(),
                        R.layout.statusbar);
                remoteViews_large=new RemoteViews(getPackageName(),R.layout.statusbar_1);

                builder = new NotificationCompat.Builder(getApplicationContext());

                builder.setSmallIcon(R.drawable.ic_launcher)
                        .setOngoing(true)
                        .setTicker("music is playing");
        notification=builder.build();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
            notification.bigContentView=remoteViews_large;
        }
                notification.contentView=remoteViews;

               mNotificationManager.notify(1,notification);

                break;
            case R.id.btn_cancel:
                mNotificationManager.cancel(1);

                break;
        }
    }
}

看吧，其实就是这么简单。

示例下载：链接：http://pan.baidu.com/s/1c1Mw28C 密码：pp7j