Question

我有一个相当简单的应用程序，它接受用户的输入，然后将其设置为通知。用户可以创建他/她喜欢的任意数量的通知。我希望用户单击该通知并转到名为ResultActivity的新活动。 ResultActivity依次从通知意图中读取putExtras并将其显示给用户。下面的代码允许我做几乎我想要的一切，除非按下通知，我收到上次创建的通知的putExtra。

Intent notificationIntent = new Intent(ctx, MainActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(ctx, i,notificationIntent,PendingIntent.FLAG_CANCEL_CURRENT);

NotificationManager nm = (NotificationManager) ctx.getSystemService(Context.NOTIFICATION_SERVICE);

Resources res = ctx.getResources();
NotificationCompat.Builder builder = new NotificationCompat.Builder(ctx);
builder.setContentIntent(contentIntent)
    .setSmallIcon(R.drawable.ic_launcher)
    .setLargeIcon(BitmapFactory.decodeResource(res,R.drawable.ic_launcher))
    .setTicker("Remember to " + text.getText())
    .setWhen(System.currentTimeMillis()).setAutoCancel(true)
    .setContentTitle(text.getText());

// Creates an explicit intent for an Activity in your app
Intent resultIntent = new Intent(this, ResultActivity.class);
String pass = text.getText().toString();

resultIntent.putExtra("title", pass);
resultIntent.putExtra("uid", i);

TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
// Adds the back stack for the Intent (but not the Intent itself)
stackBuilder.addParentStack(ResultActivity.class);
// Adds the Intent that starts the Activity to the top of the stack
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,PendingIntent.FLAG_UPDATE_CURRENT);

new Uri.Builder().scheme("data").appendQueryParameter("text", "my text").build();
builder.setContentIntent(resultPendingIntent);

Notification n = builder.build();
n.flags = Notification.FLAG_NO_CLEAR;
nm.notify(i++, n);
text.setText(null);

打开应用程序
输入“One”
点击确定
发送通知
打开应用程序
输入“两个”
点击确定
发送通知

现在您有两个通知。一个说“一个”，一个说“两个”。如果您点击通知“两个”，它会转到一个显示“两个”的屏幕。完美！

如果您单击通知“One”，则会转到显示“Two”的屏幕。 BROKEN！

ResultActivity.java

public class ResultActivity extends Activity {
    String title = null;
    TextView text;

    int i=0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity);
        text = (TextView) findViewById(R.id.textView1);



        title = getIntent().getStringExtra("title");
         i = getIntent().getIntExtra("uid", 0);


        text.setText(title);

    }

Answer 1

我知道这是很久以前的事了，但我觉得答案没有说明代码中的问题。所以问题就在这里 PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,PendingIntent.FLAG_UPDATE_CURRENT);

所以你从stackbuilder创建一个pendingIntent，其中包含update_current的标志。如果你看一下FLAG_UPDATE_CURRENT，就说

 /**
 * Flag indicating that if the described PendingIntent already exists,
 * then keep it but replace its extra data with what is in this new
 * Intent. For use with {@link #getActivity}, {@link #getBroadcast}, and
 * {@link #getService}. <p>This can be used if you are creating intents where only the
 * extras change, and don't care that any entities that received your
 * previous PendingIntent will be able to launch it with your new
 * extras even if they are not explicitly given to it.
 */
public static final int FLAG_UPDATE_CURRENT = 1<<27;

所以在你的用例中发生的事情是你从stackbuilder创建两个相同的pendingintents，第二个intent重写第一个。实际上你永远不会创建第二个你只是更新第一个的额外内容。

所以遗憾的是，你的用例没有可用的标志，但它周围有一个很好的黑客。你可以做的是使用你的resultIntent的setAction并放置一个随机字符串或一个对你的应用有意义的字符串。

例如。 resultIntent.setAction("dummy_action_" + notification.id);

这将使您的resultIntent足够独特，以便pendingIntent将创建它而不是更新前一个。

Answer 2

您创建了多个混合的意图。我清理了代码（但没有测试它）

    NotificationManager nm = (NotificationManager) ctx
            .getSystemService(Context.NOTIFICATION_SERVICE);

    Resources res = ctx.getResources();

    // Creates an explicit intent for an Activity in your app
    Intent resultIntent = new Intent(this, ResultActivity.class);
    String pass = text.getText().toString();
    resultIntent.setData(new Uri.Builder().scheme("data")
            .appendQueryParameter("text", "my text").build());
    resultIntent.putExtra("title", pass);
    resultIntent.putExtra("uid", i);

    TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
    // Adds the back stack for the Intent (but not the Intent itself)
    stackBuilder.addParentStack(ResultActivity.class);
    // Adds the Intent that starts the Activity to the top of the stack
    stackBuilder.addNextIntent(resultIntent);
    PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,
            PendingIntent.FLAG_UPDATE_CURRENT);

    NotificationCompat.Builder builder = new NotificationCompat.Builder(ctx);
    builder.setSmallIcon(R.drawable.ic_launcher)
            .setLargeIcon(
                    BitmapFactory.decodeResource(res,
                            R.drawable.ic_launcher))
            .setTicker("Remember to " + text.getText())
            .setWhen(System.currentTimeMillis()).setAutoCancel(true)
            .setContentTitle(text.getText())
            .setContentIntent(resultPendingIntent);

    Notification n = builder.build();
    n.flags = Notification.FLAG_NO_CLEAR;
    nm.notify(i++, n);

    text.setText(null);

Answer 3

设置不同的requestCode可以帮助我创建和更新当前意图。

val pendingIntent = PendingIntent.getActivity(
  this,
  notificationID,
  intent,
  PendingIntent.FLAG_UPDATE_CURRENT
)

Answer 4

使用一些随机的requestCode分隔两个通知

PendingIntent pendingIntent = PendingIntent.getActivity(context, CommonTools.getRandomNumber(1, 100),
            notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);

public int getRandomNumber(int min, int max) {
    // min (inclusive) and max (exclusive)
    Random r = new Random();
    return r.nextInt(max - min) + min;
}

Android多个通知和多个意图

ResultActivity.java

4 个答案: