Question

我正在尝试为我的媒体播放器实现自定义通知，其中通知栏只有一个按钮，可用作停止和播放控件。

到目前为止已经成功实现了通知并且按钮正在进行函数调用，但问题是onReceive在创建intent并调用activity时，活动在重新创建之上旧的，我得到了糟糕的双重回应媒体播放器在后台播放。

尝试使launchMode = Single，但是当我单击按钮时单击按钮没有任何区别，这意味着如果我将启动模式设置为 SINGLE ，则不会进行函数调用而不是 STANDARD 。

MAIN_ACTIVITY CODE SNIPPET

//NOTIFICATION RELATED CLASSES
    private NotificationCompat.Builder builder;
    private NotificationManager notificationManager;
    //private int notification_id;
    private RemoteViews remoteViews;
    Context context;
    Intent notification_intent;

    final int notification_id =545816666;

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


        boolean attachMedia = getIntent().getBooleanExtra("attachMedia",false);
        if (attachMedia) {
            attachMediaActivity();
        }

        //CODE DE NOTIFICATION
        context =this;

        notification_intent=new Intent(context,MainActivity.class);

        notificationManager=(NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        remoteViews=new RemoteViews(getPackageName(),R.layout.custom_notification);

        remoteViews.setImageViewResource(R.id.notif_icon,R.mipmap.ic_launcher);
        remoteViews.setTextViewText(R.id.notif_title,"BOOM");
        remoteViews.setTextViewText(R.id.button,"Button");
 Intent button_intent= new Intent("player_control_clicked");
        button_intent.putExtra("id",notification_id);

        PendingIntent p_button_intent=PendingIntent.getBroadcast(context,123,button_intent,0);
        remoteViews.setOnClickPendingIntent(R.id.button,p_button_intent);


        tview=(TextView) findViewById(R.id.playerText);
        btn=(Button) findViewById(R.id.playerButton);

        if(!mediaPlayer.isPlaying())
        {
            tview.setText("Press play");
            btn.setText("Play");
        }
        else
        {
            tview.setText("Playing");
            btn.setText("Stop");
        }

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                //Intent notification_intent=new Intent(context,MainActivity.class);

                //THIS CODE UPDATES OLD NOTIFICATION
                PendingIntent pendingIntent=PendingIntent.getActivity(context,0,notification_intent,PendingIntent.FLAG_UPDATE_CURRENT);

                builder =new NotificationCompat.Builder(context);

                builder.setSmallIcon(R.mipmap.ic_launcher)
                        .setCustomBigContentView(remoteViews)
                        .setContentIntent(pendingIntent)
                        .setOngoing(true);

                notificationManager.notify(notification_id,builder.build());


               if(!mediaPlayer.isPlaying())
               {
                   //tview.setText("Playing");
                   btn.setText("Stop");
                   playStream();
               }
                else
                {
                    tview.setText("Stopped");
                    btn.setText("Play");
                    mediaPlayer.stop();
                    mediaPlayer.reset();
                }
            }
        });

    }

    public void attachMediaActivity()
    {
        //CODE DE NOTIFICATION
        context =this;

        notification_intent=new Intent(context,MainActivity.class);

        notificationManager=(NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        remoteViews=new RemoteViews(getPackageName(),R.layout.custom_notification);

        remoteViews.setImageViewResource(R.id.notif_icon,R.drawable.stream_icon);
        remoteViews.setTextViewText(R.id.notif_title,"Stopped");
        remoteViews.setTextViewText(R.id.button,"STOPA");

        Intent button_intent= new Intent("player_control_clicked");
        button_intent.putExtra("id",notification_id);

        /*PendingIntent p_button_intent=PendingIntent.getBroadcast(context,123,button_intent,0);
        remoteViews.setOnClickPendingIntent(R.id.button,p_button_intent);*/
        PendingIntent pendingIntent=PendingIntent.getActivity(context,0,notification_intent,PendingIntent.FLAG_UPDATE_CURRENT);

        builder =new NotificationCompat.Builder(context);

        builder.setSmallIcon(R.mipmap.ic_launcher)
                .setCustomBigContentView(remoteViews)
                .setContentIntent(pendingIntent)
                .setOngoing(true);

        notificationManager.notify(notification_id,builder.build());


        if (mediaPlayer.isPlaying())
        {
            mediaPlayer.stop();
        }
        else
        {
            playStream();
        }
    }

用于通知按钮的广播听众点击通过直接调用活动

public class Button_listener extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        NotificationManager manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        manager.cancel(intent.getExtras().getInt("id"));
        Toast.makeText(context, "GENERATED BY NOTIFICATION", Toast.LENGTH_SHORT).show();
        intent= new Intent(context, MainActivity.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        //intents.addExtra("attachMedia",true); // Extra info
        intent.putExtra("attachMedia",true);
        context.startActivity(intent);
    }
}

MY MANIFEST

<activity android:name=".MainActivity"
    android:screenOrientation="portrait"
    android:launchMode="singleTop"
    android:noHistory="true">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />

        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

<receiver android:name="Button_listener">
    <intent-filter>
        <action android:name="player_control_clicked"/>
    </intent-filter>
</receiver>

提前致谢 PS：在堆叠上尝试每一个可能的答案

Answer 1

问题在于你的意图标志

你添加了标志intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);，将其更改为intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

如需更多参考，请阅读此https://developer.android.com/reference/android/content/Intent.html

在通知按钮上单击意图开始新活动而不是恢复

1 个答案: