Android 接收推送消息跳转到指定页面的方法

<style name="AlertDialogActivityTheme" parent="Theme.AppCompat.Dialog">
  <item name="windowActionBar">false</item>
  <item name="android:windowFrame">@null</item>
  <item name="windowNoTitle">true</item> //去掉标题
  <item name="android:windowBackground">@android:color/transparent</item> //背景透明
  <item name="android:windowCloseOnTouchOutside">true</item> //设置触摸弹框外面是否会消失
  <item name="android:windowIsFloating">true</item>
  <item name="android:windowContentOverlay">@null</item>
  <item name="android:windowIsTranslucent">true</item>
</style>

<activity
  android:name=".getui.AlertDialogActivity"
  android:theme="@style/AlertDialogActivityTheme">
</activity>

<item name="android:windowNoTitle">true</item>

public class AlertDialogActivity extends AppCompatActivity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.dialog_activity);
    
    //设置弹框大小，此处宽度为屏幕宽度减去160像素
    getWindow().setLayout(DeviceUtil.getDisplayParametersW(this)-160, ViewGroup.LayoutParams.WRAP_CONTENT);
    getWindow().setGravity(Gravity.CENTER);

    initView();
  }
}

//关键的地方
PendingIntent contentIntent = PendingIntent.getActivities(context, 0, intents, PendingIntent.FLAG_UPDATE_CURRENT);

NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
    //省略其他的一些设置
    .setContentIntent(contentIntent)
    //省略其他的一些设置
    
Notification notification = builder.build();
notification.flags = Notification.FLAG_AUTO_CANCEL;
mNotificationManager.notify((int) System.currentTimeMillis() / 1000, notification);

Intent[] intents = new Intent[2];
Intent intent_main = new Intent(getApplicationContext(), MainActivity.class);
Intent intent_target = new Intent(getApplicationContext(), TargetActivity.class);

intents[0] = intent_main;
intents[1] = intent_target;

<activity
  android:name=".ui.main.MainActivity"
  android:launchMode="singleInstance" />